MIC5159 Datasheet by Microchip Technology

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MIC5159
Programmable Current Limit µCap LDO
Regulator Controller
IttyBitty is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2006
M9999-062706
General Description
Micrel’s MIC5159 is a precision-voltage regulator
controller. Used with an external P-Channel MOSFET, the
MIC5159 forms a two-chip low-dropout regulator capable
of driving a wide range of output currents.
The MIC5159 operates from an input of 1.65V to 5.5V. The
low input voltage allows the MIC5159 to operate off of high
power 1.8V rails to generate lower voltages such as 1.5V.
Features of the MIC5159 include enable input and current-
limit protection. As a µCap design, the MIC5159 is stable
with ceramic output capacitors.
The MIC5159 is packaged in the IttyBitty
®
SOT-23-6, and
is offered in fixed and adjustable output voltages. Junction
temperature range of the MIC5159 is from –40°C to
+125°C.
Features
Fast transient response
Input voltage range: V
IN
1.65V to 5.5V
±1.0% initial output tolerance
Fixed 1.8V or adjustable output voltage down to 1.25V
Stable with ceramic output capacitor
Capable up to 10A
Excellent line and load regulation specifications
Logic-controlled shutdown
Programmable current limit
Current-limit protection
IttyBitty
®
SOT-23-6 package
Available temperature range:–40°C to +125°C
Applications
Ultra-high current, ultra-low dropout voltage regulator
High-efficiency linear power supplies
Low-voltage distributed power
Fixed telecom
Multimedia and PC power supplies
Battery chargers
Low-voltage DSP, microprocessor and microcontroller
power supplies
Typical Application
GATE
EN
FB
V
IN
IN
IS
V
OUT
GND
U1 MIC5159BM6/YM6
Q1–Q4
SUB15P01–52 × 4
R1
5
1
3
GND
C1
R2
GND
C1 C1
Adjustable Output Voltage
V
IN
= 3.3V
V
OUT
= 2.5V
C
OUT
= 200µF
10A
100mA
|:||:||:| |:||:||:|
Micrel, Inc. MIC5159
June 2006
2
M9999-062706
Ordering Information
Part Number
Standard Pb-Free
Marking Voltage* Junction
Temp. Range Package
MIC5159BM6 MIC5159YM6 LZAA Adj. –40° to +125°C SOT-23-6
MIC5159-1.8BM6 MIC5159-1.8YM6 LZ18 1.8V. –40° to +125°C SOT-23-6
MIC5159-3.0BM6 MIC5159-3.0YM6 LZ30 3.0V –40° to +125°C SOT-23-6
Note:
Other Voltage available. Contact Micrel for details.
Pin Configuration
IN GND
GATE
IS
13
46
ADJ
LZAA
5
EN
2
Pin 1
Index
IN GND
GATE
IS
13
46
OUT
LZxx
5
EN
2
Pin 1
Index
SOT-23-6 (M6)
Adjustable Voltage Version
SOT-23-6 (M6)
Fixed Voltage Version
Pin Description
Pin Number Pin Name Pin Function
1 IN Input Voltage.
2 GND Ground.
3 IS Current Sense: IS must be tied to VIN pin if the current limit feature is not used.
4 GATE Gate drive of the external P-Channel MOSFET.
5 EN Enable Input: Logic Level ON/OFF control. Logic high = ON; logic low = OFF.
ADJ Adjustable Regulator Feedback Input: Connect to resistor voltage divider.
6 OUT Output Voltage: Connect to drain of P-Channel MOSFET to regulate output to
proper voltage.
Micrel, Inc. MIC5159
June 2006
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Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
)....................................................+6.0V
Enable Input Voltage (V
EN
)..........................................+6.0V
Power Dissipation (P
D(max)
) ........................................ Note 3
Storage Temperature (T
s
) .........................–65°C to +150°C
Lead Temperature (soldering, 5 sec.)........................ 260°C
EDS Rating
(4)
.................................................................. 2kV
Operating Ratings
(2)
Supply voltage (V
IN
) ................................... +1.65V to +5.5V
Enable Input Voltage (V
EN
)................................ 0V to +5.5V
Junction Temperature (T
J
) ..................–40°C T
J
+125°C
Package Thermal Resistance
SOT-23-6 (
JA
).................................................235°C/W
Electrical Characteristics
(5)
T
A
= 25°C with V
IN
= V
OUT
+ 1V; V
EN
= 1.2V, C
IN
= C
OUT
= 10µF, ceramic, I
OUT
= 10mA; bold values indicate –40°C < T
J
< +125°C;
unless otherwise specified, Note 3
Parameter Condition Min Typ Max Units
At 25°C –1 +1 % Output Voltage Accuracy
Over temperature range –2 +2 %
Output Voltage Line Regulation V
IN
= V
OUT
+ 1.0V to 5.5V –0.1 0.007 +0.1 %/V
Output Voltage Load Regulation I
L
= 10mA to 1.0A 0.2 1.0 %
V
EN
0.2V (MIC5159 OFF) 15 30 µA
Ground Pin Current
(6)
V
EN
1.2V (MIC5159 ON) 10 20 mA
Adjust Pin Bias Current 1 µA
(PFET fully ON); V
IN
= 5.0V 4.5 V
(PFET fully ON); V
IN
= 3.3V 3.1 V
Maximum V
GS
(PFET fully ON); V
IN
= 2.5V 2.3 V
Current-Limit Threshold V
IN
– V
IS
40 50 65 mV
Start-up Time V
EN
= V
IN
30
150 µs
Enable Input
Regulator enabled 1.2 V
Regulator shutdown 0.2 V
Enable Input Threshold
Enable hysteresis 20 50 250 mV
Independent of state 0.01 nA Enable Pin Input Current
1 µA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. P
D(max)
= (T
J(max)
– TA) ÷
JA
, where
JA
depends upon the printed circuit layout, see “Applications Information.”
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
.
Micrel, Inc. MIC5159
June 2006
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M9999-062706
Typical Characteristics
1.220
1.225
1.230
1.235
1.240
1.245
1.250
1.65
2.15
2.65
3.15
3.65
4.15
4.65
5.15
5.65
REFERENCE VOLTAGE (V)
INPUT VOLTAGE (V)
Reference Voltage
vs. Input Voltage
1.230
1.231
1.232
1.233
1.234
1.235
1.236
1.237
1.238
1.239
1.240
-40 -20 0 20 40 60 80 100 120
REFERENCE VOLTAGE (V)
TEMPERATURE (°C)
Reference Voltage
vs. Temperature
V
IN
=3.3V
1.230
1.231
1.232
1.233
1.234
1.235
1.236
1.237
1.238
1.239
1.240
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
OUTPUT VOLTAGE (V)
LOAD (A)
Output Voltage
vs. Load
V
IN
=2.5V
0
1
2
3
4
5
6
7
8
9
10
1.65
2.15
2.65
3.15
3.65
4.15
4.65
5.15
5.65
QUIESCENT CURRENT (mA)
INPUT VOLTAGE (V)
Quiescent Current
vs. Input Voltage
I
LOAD
=10mA
0
1
2
3
4
5
6
7
8
9
10
-40 -20 0 20 40 60 80 100 120
QUIESCENT CURRENT (mA)
TEMPERATURE (°C)
Quiescent Current
vs. Temperature
V
IN
=3.3V
0
1
2
3
4
5
6
7
8
9
10
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
QUIESCENT CURRENT (mA)
LOAD (A)
Quiescent Current
vs. Load
V
IN
=2.5V
40
42
44
46
48
50
52
54
56
58
60
1.65
2.15
2.65
3.15
3.65
4.15
4.65
5.15
5.65
CURRENT LIMIT THRESHOLD (mV)
INPUT VOLTAGE (V)
Current Limit Threshold
vs. Input Voltage
40
42
44
46
48
50
52
54
56
58
60
-40 -20 0 20 40 60 80 100 120
CURRENT LIMIT THRESHOLD (mV)
TEMPERATURE (°C)
Current Limit Threshold
vs. Temperature
0
100
200
300
400
500
600
700
800
-40 -20 0 20 40 60 80 100 120
ENABLE THRESHOLD (mV)
TEMPERATURE (°C)
Enable Threshold
vs. Temperature
EN on
EN off
0
100
200
300
400
500
600
700
1.65
2.15
2.65
3.15
3.65
4.15
4.65
5.15
5.65
ENABLE THRESHOLD (mV)
INPUT VOLTAGE (V)
Enable Threshold
vs. Input Voltage
EN on
EN off
0
2
4
6
8
10
12
14
16
18
20
1.65
2.15
2.65
3.15
3.65
4.15
4.65
5.15
5.65
SHUTDOWN CURRENT (µA)
INPUT VOLTAGE (V)
Shutdown Current
vs. Input Voltage
85°C
25°C
-4C
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Micrel, Inc. MIC5159
June 2006
5
M9999-062706
Functional Characteristics
V
IN
= 1.8V
V
OUT
= 1.5V
C
OUT
= 100µF
2A
10mA
V
IN
= 3.3V
V
OUT
= 1.8V
EN Vour EN GATE Enab‘e June 2006
Micrel, Inc. MIC5159
June 2006
6
M9999-062706
Functional Diagram
EN
IN
GATE
GND
V
OUT
V
OUT
V
REF
V
REF
V
IN
R
S
I
S
Enable
I
SNS
Amplifier
Buffer
S
Block Diagram – Fixed Output Voltages
EN
IN
GATE
ADJ.
V
OUT
V
REF
V
REF
V
IN
R
S
I
S
Enable
I
SNS
Amplifier
R1
R2
Buffer
S
Block Diagram – Adjustable Output Voltages
Micrel, Inc. MIC5159
June 2006
7
M9999-062706
Application Information
The MIC5159 is a high performance voltage regulator
controller. When used with an external P-Channel
MOSFET and a tiny ceramic output capacitor, it forms a
wide variety of simple, inexpensive ultra-low-dropout
voltage regulators.
Current Sense Resistor Selection
A current sense resistor placed between the input and
the current sense pin (IS) allows for programmability of
the current limit. This resistor can simply be calculated
by:
=
OUT
SENSE
I
50mV
R
Where I
OUT
is the maximum output current. For example,
the current sense resistor for a 2.5V
IN
to 1.8V
OUT
, 5A,
linear regulator calculates as follows:
=5A
50mV
R
SENSE
R
SENSE
= 10m
P-Channel MOSFET Selection
The P-Channel MOSFET selected for use with the
MIC5159 must satisfy the following requirements:
Input voltage
Gate threshold
Load current
Dropout voltage (input-to-output differential)
Thermal performance
To prevent damage to the P-Channel MOSFET, the
maximum input voltage (V
IN(max)
) must be less than its
drain-source breakdown voltage (BV
DS
). In addition, the
minimum input voltage (V
IN(min)
) must be greater than or
equal to the gate threshold voltage (V
GS
) of the P-
Channel MOSFET. For a given output current and
dropout requirement, the ON-resistance (R
DS(ON)
) of the
P-Channel MOSFET must also be determined. The
minimum R
DS(ON)
of the P-Channel MOSFET is
calculated as follows:
()
SENSE
OUT(MAX)
OUTIN(MIN)
DS(ON)
R
I
VV
R
=
Where I
OUT(max)
is the maximum output current and
R
SENSE
is the current sense resistor.
For example, the MIC5159-1.8BM6 is used with an
external MOSFET to form a 5A LDO with an input of
2.5V. Either a 2.5V or 1.8V gate threshold MOSFET can
be selected. The minimum R
DS(ON)
is calculated as:
(
)
m10
5A
V8.12.5V
R
DS(ON)
=
R
DS(ON)
= 130m
According to the above calculation, the minimum R
DS(ON)
is 130m for a 2.5V to 1.8V LDO with 5A of output
current. For this design, the R
DS(ON)
for the FETs should
maintain better than 130m over the required
temperature, current, and voltage conditions.
Placing two or more P-Channel FETs in parallel can
reduce the total R
DS(ON)
of the regulator. This also aids
thermal dissipation by sharing the current and heat
between the multiple FETs.
Thermal Considerations
Linear regulators are simple to use. The most
complicated design parameters to consider are thermal
characteristics. Since the MIC5159 offers no thermal
protection, thermal design requires the following
application-specific parameters:
Maximum ambient temperature (T
A
)
Output current (I
OUT
)
Output voltage (V
OUT
)
Input voltage (V
IN
)
First, calculate the maximum power dissipation of the
regulator:
P
D
= (V
IN
– V
OUT
) × I
OUT
Ground current can generally be ignored. The amount of
power dissipated by ground current and input voltage is
minimal. Minimum
JA
for the MOSFET can be
calculated using the following formula:
(
)
=
D
AJ(MAX)
JA P
TT
Where T
J(max)
is equal to the maximum die temperature
of the P-Channel.
JA
=
JC
+
CS
+
SA
Example
For the same regulator, 2.5V
IN
to 1.8V
OUT
at 5A with an
ambient temperature of 60°C:
P
D
= (2.5V–1.8V) × 5A
P
D
= 3.5W
Where V
IN
is the maximum V
IN
and I
OUT
is the maximum
I
OUT
.
The P-Channel MOSFET must be able to dissipate
3.5W. The minimum
JA
to maintain a maximum T
J
of
150°C (max.) T
J
according to a typical MOSFET data
sheet is as follows:
(
)
3.5W
C60C150
JA
°°
=
vuu 1m R 15?) A LLL Rsz sz 25mm 0 10M — June 2006
Micrel, Inc. MIC5159
June 2006
8 M9999-062706
JA
= 25.71°C/W
The heatsink and MOSFET must have a combined
thermal resistance to meet the above criteria.
The typical thermal resistance from the junction to the
case (
JC
) of a TO-263 (D
2
pack) is 6°C/W. Adding
0.2°C/W for case to sink thermal resistance (
CS
), the
heatsink must have a sink to ambient thermal resistance
(
SA
) of:
SA
=
JA
– (
JC
+
CS
)
SA
= 25.71°C/W – (6°C/W + 0.2°C/W)
SA
= 19.51°C/W
According to the calculations, the heatsink must have a
SA
of 19.51°C/W or better.
For a full discussion of heat sinking and thermal effects
on voltage regulators, refer to the “Regulator Thermals
section of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook.
Short-Circuit Current Limit
The above thermal design calculations apply to normal
operation. In the case where the P-Channel MOSFET
must survive extended periods of short-circuit current,
another approach for thermal design must be
considered. Due to the fact that the MIC5159 delivers
constant current limiting, power dissipated by the
MOSFET is equal to the input voltage multiplied by the
maximum output current.
Figure 1 shows a simple, inexpensive circuit that allows
the current limiting to be re-entrant. This reduces power
dissipation in current limited conditions. As the output
voltage begins to drop, the differential voltage across the
input and output increases. This pulls the current sense
voltage lower, reducing the amount of output current to
maintain 50mV across the sense resistor. This reduction
in output current equates to a reduction in power
dissipation in the MOSFET. Figures 2 and 3 show a
comparison of linear current limiting versus the re-
entrant current limiting scheme implemented in Figure 1.
MIC5159-1.8BM6/YM6
R
VOUT
R
SENSE
C1
10µF
3.3 V
IN
R
VIN
Q1,2,3
Si4433DYx3
ISENSE
VIN
GATE
ADJ
C2
47µF
1.8 V
OUT
1.5
A
Figure 1. Re-Entrant Current Limit
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Constant Current Limit
Re-Entrant
Current Limit
Figure 2. Output Voltage Characteristics
Re-Entrant Current Limit
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0 0.5 1 1.5
POWER DISSIPATION (W)
OUTPUT VOLTAGE (V)
Re-Entrant
Current Limiting
Constant Current
Limiting
Figure 3. Power Dissipation
vs. Output Voltage
Enable/Shutdown
The MIC5159 comes with an active-high enable pin that
allows the regulator to be disabled. Forcing the enable
pin low disables the regulator and sends it into a low off-
mode-current state. Forcing the enable pin high enables
the output voltage. This part is CMOS and the enable pin
cannot be left floating; a floating enable pin may cause
an indeterminate state on the output.
Output Capacitor
The MIC5159 requires an output capacitor to maintain
stability and improve transient response. Proper
selection is important to ensure proper operation. The
MIC5159 output capacitor selection is highly dependent
upon the components and the application. With a very
high gate charge (gate capacitance) MOSFET, the
output requires a much larger valued ceramic capacitor
for stability. As an alternative to a large valued ceramic
capacitor, a smaller-valued tantalum capacitor can be
used to provide stability. At higher load currents, lower
R
DS(ON)
MOSFETs are used; these MOSFETs typically
having much larger gate charge. If the application does
not require ultra-low-dropout voltage, smaller values of
ceramic capacitance may be used.
d be as close eclively. Trace the MOSFET esistance will f a factor al een the gate MOSFET gate reate a small e capacitance y tank circult. gate may be E R; R2 M99997062706
Micrel, Inc. MIC5159
June 2006
9 M9999-062706
Input Capacitor
An input capacitor of 1.0µF or greater is recommended
when the device is more than 4 inches away from the
bulk AC supply capacitance or when the supply is a
battery. Small, surface mount, ceramic capacitors can be
used for bypassing the input to the regulator, further
improving the integrity of the output voltage. Larger input
capacitors may be required depending on the
impedance of the source and the output load
requirements.
Layout Considerations
Input and output capacitor placement should be as close
as possible to the input and output, respectively. Trace
resistance between the current sense and the MOSFET
source should be minimized. Trace resistance will
increase dropout voltage. This is more of a factor at
higher output currents.
Also, a minimum amount of distance between the gate
pin, on the MIC5159, and the P-Channel MOSFET gate
is recommended. A long trace can create a small
parasitic inductor. This, coupled to the gate capacitance
of the MOSFET, can create a high frequency tank circuit.
A small 50 resistor in series with the gate may be
required to eliminate high-frequency noise.
Adjustable Regulator Design
The MIC5159 allows programming the output voltage
anywhere between 1.235V to V
IN
. Two resistors are
used. See Figure 4. The resistor values are calculated
by:
×= 1
1.235
V
R2R1
OUT
Where V
OUT
is the desired output voltage.
VIN RS
R1
R2
VOUT
COUT = 10µF
ceramic
Si3445
IS
ADJIN
EN GND
GATE
MIC5159-x.x
Figure 4. Adjustable Regulator Design
Micrel, Inc. MIC5159
June 2006
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M9999-062706
Designing with MIC5159
The following section details:
Application examples of possible input/output
configurations with related schematics
designator.
Schematics with “Bill of Materials”
recommendation, dropout performance and
maximum output current for each FET
combination.
Further advice on MOSFET selection.
3.3V
IN
to 2.5V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
1.0A 10µF Si4433DY SO-8 C
2.5A 22µF Si4433DY x2 SO-8 D
2.5A 10µF SUB15P01-52 D2PAK H
3.5A 44µF Si4433DY x3 SO-8 E
5.0A 44µF Si4433DY x4 SO-8 F
5.0A 22µF SUB15P01-52 x2 D2PAK I
7.5A 44µF SUB15P01-52 x3 D2PAK J
10.0A 44µF SUB15P01-52 x4 D2PAK K
3.3V
IN
to 1.8V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
0.6A 10µF Si4433DY SO-8 C
1.25A 22µF Si4433DY x2 SO-8 D
1.25A 10µF SUB15P01-52 D2PAK H
2.0A 44µF Si4433DY x3 SO-8 E
2.5A 44µF Si4433DY x4 SO-8 F
2.5A 22µF SUB15P01-52 x2 D2PAK I
3.75A 44µF SUB15P01-52 x3 D2PAK J
5.0A 44µF SUB15P01-52 x4 D2PAK K
3.3V
IN
to 1.5V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
0.5A 10µF Si4433DY SO-8 C
1.0A 22µF Si4433DY x2 SO-8 D
1.0A 10µF SUB15P01-52 D2PAK H
1.5A 44µF Si4433DY x3 SO-8 E
2.0A 44µF Si4433DY x4 SO-8 F
2.0A 22µF SUB15P01-52 x2 D2PAK I
3.0A 44µF SUB15P01-52 x3 D2PAK J
4.25A 44µF SUB15P01-52 x4 D2PAK K
3.3V
IN
to 1.25V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
0.4A 10µF Si4433DY SO-8 C
0.75A 22µF Si4433DY x2 SO-8 D
0.75A 10µF SUB15P01-52 D2PAK H
1.25A 44µF Si4433DY x3 SO-8 E
1.75A 44µF Si4433DY x4 SO-8 F
1.75A 22µF SUB15P01-52 x2 D2PAK I
2.75A 44µF SUB15P01-52 x3 D2PAK J
3.75A 44µF SUB15P01-52 x4 D2PAK K
2.5V
IN
to 1.8V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
1.25A 10µF Si4433DY SO-8 C
2.5A 22µF Si4433DY x2 SO-8 D
2.5A 10µF SUB15P01-52 D2PAK H
4.0A 44µF Si4433DY x3 SO-8 E
5.5A 44µF Si4433DY x4 SO-8 F
5.5A 22µF SUB15P01-52 x2 D2PAK I
8.0A 44µF SUB15P01-52 x3 D2PAK J
11.0A 44µF SUB15P01-52 x4 D2PAK K
2.5V
IN
to 1.5V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
1.0A 10µF Si4433DY SO-8 C
2.0A 22µF Si4433DY x2 SO-8 D
2.0A 10µF SUB15P01-52 D2PAK H
3.0A 44µF Si4433DY x3 SO-8 E
4.0A 44µF Si4433DY x4 SO-8 F
4.0A 22µF SUB15P01-52 x2 D2PAK I
6.0A 44µF SUB15P01-52 x3 D2PAK J
8.0A 44µF SUB15P01-52 x4 D2PAK K
2.5V
IN
to 1.25V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
0.75A 10µF Si4433DY SO-8 C
1.5A 22µF Si4433DY x2 SO-8 D
1.5A 10µF SUB15P01-52 D2PAK H
2.0A 44µF Si4433DY x3 SO-8 E
3.0A 44µF Si4433DY x4 SO-8 F
3.0A 22µF SUB15P01-52 x2 D2PAK I
4.5A 44µF SUB15P01-52 x3 D2PAK J
6.0A 44µF SUB15P01-52 x4 D2PAK K
Micrel, Inc. MIC5159
June 2006
11
M9999-062706
1.8V
IN
to 1.5V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
2.0A 10µF Si3445DV TSOP-6 A
4.0A 22µF Si3445DV x2 TSOP-6 B
6.0A 200µF Si4403DY x2 SO-8 G
7.0A(1) 44µF SUB15P01-52 x4 D2PAK K
Note:
1. For space constrained designs, a DPAK equivalent can be used in
this application (SUD15P01-52). This is due to R
DS(ON)
limitation NOT
power dissipation.
1.8V
IN
to 1.25V
OUT
Conversion
I
OUT
C
OUT
MOSFET Package Schematic
1.0A 10µF Si3445DV TSOP-6 A
1.5A 10µF Si4433DY SO-8 C
3.0A 22µF Si4433DY x2 SO-8 D
3.0A 10µF SUB15P01-52 D2PAK H
4.5A 44µF Si4433DY x3 SO-8 E
6.0A 44µF Si4433DY x4 SO-8 F
6.5A 22µF SUB15P01-52 x2 D2PAK I
9.0A 88µF SUB15P01-52 x3 D2PAK J
13.0A 88µF SUB15P01-52 x4 D2PAK K
SGMSDV vWY D LLL E R3 m 7 7 5 Q 49 9;; mks: EN GATE 1 F , 595v ‘ IN FB 5 3 Is GND 2 1cm: 7 REA 6.3V D a GNU Q7 GND
Micrel, Inc. MIC5159
June 2006
12
M9999-062706
Schematic A
Input/Output Combination Examples
Input Output Maximum Current
1.8V 1.5V 2A
1.8V 1.25V 1A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0 0.5 1 1.5 2 2.5 3
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si3445DV SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1
C2 C2012X5RR0J106M Murata 10µF, 6.3V Ceramic MLCC, Size 0805 1
R1 CRCW08051002 Vishay Dale
(2)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76k Resistor, Size 0805
(3)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(3)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(3)
1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(3)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1 Si3445DV Vishay Siliconix
(4)
P-Channel MOSFET TSOP-6 1
U1 MIC5159BM6/YM6 Micrel, Inc.
(5)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. Vishay Dale Tel: 402-563-6866
3. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
4. Vishay Siliconix Tel: 402-563-6866
5. Micrel, Inc. Tel: 408-944-0800
m 02 5‘3“st 5‘3“an Vw D— / Vow 4a as m f4 9 ‘ m EN GATE 9 g D um 5 av 02 22,.F R2. 6 avnov u a 5m GND
Micrel, Inc. MIC5159
June 2006
13
M9999-062706
Schematic B
Input/Output Combination Examples
Input Output Maximum Current
1.8V 1.5V 4A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0123456
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si3445DV x2 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1 C1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 1 C2
C2012X5RR0J106M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1, Q2 Si3445DV Vishay Siliconix
(5)
P-Channel MOSFET TSOP-6 2
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
Q1 v W smaanv VW R3 R1 5 EN GATE , 49 99 1am ‘ 5 IN FB ca 3 IS GND 2 IMF _‘ R2‘ :: ‘ :1 GND J7 6ND
Micrel, Inc. MIC5159
June 2006
14
M9999-062706
Schematic C
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 1A
3.3V 1.8V 0.6A
3.3V 1.5V 0.5A
3.3V 1.25V 0.4A
2.5V 1.8V 1.25A
2.5V 1.5V 1A
2.5V 1.25V 0.75A
1.8V 1.25V 1.5A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0 0.5 1 1.5 2
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si34433DY SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1
C2 C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805 1
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1 Si4433DY Vishay Siliconix
(5)
P-Channel MOSFET SO-8 1
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
01 Q2 s‘manv smaauv Von 6 av c2 22% a awwv GND cm) m m) x‘s‘
Micrel, Inc. MIC5159
June 2006
15
M9999-062706
Schematic D
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 2.5A
3.3V 1.8V 1.25A
3.3V 1.5V 1A
3.3V 1.25V 0.75A
2.5V 1.8V 2.5A
2.5V 1.5V 2A
2.5V 1.25V 1.5A
1.8V 1.5V 2A
1.8V 1.25V 3A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
01234
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si34433DY x2 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1 C1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 1 C2
C3225X5R1A226M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.3V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1, Q2 Si4433DY Vishay Siliconix
(5)
P-Channel MOSFET SO-8 2
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
OI Q2 0: smAaaDv swmanv smasnv Vw Vow 4:! m— EN GATE 10 F 6§v IN (:2 IS 22% R2. sawmv : :1 GND GND m m) x‘s‘
Micrel, Inc. MIC5159
June 2006
16
M9999-062706
Schematic E
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 3.5A
3.3V 1.8V 2A
3.3V 1.5V 1.5A
3.3V 1.25V 1.25A
2.5V 1.8V 4A
2.5V 1.5V 3A
2.5V 1.25V 2A
1.8V 1.25V 4.5A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0123456
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si34433DY x3 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1 C1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 1 C2
C3225X5R1A226M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1,Q2,
Q3
Si4433DY Vishay Siliconix
(5)
P-Channel MOSFET SO-8 3
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
iOuF 53v 0‘ 02 smazov SIMJHDV 03 04 smaanv smaanv R? Vow 44a 1:2 ZZMF 4[7fL?3w‘ov H ?' GND a ”s
Micrel, Inc. MIC5159
June 2006
17
M9999-062706
Schematic F
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 5A
3.3V 1.8V 2.5A
3.3V 1.5V 2A
3.3V 1.25V 1.75A
2.5V 1.8V 5.5A
2.5V 1.5V 4A
2.5V 1.25V 3A
1.8V 1.25V 6.5A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
02468
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si34433DY x4 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1 C1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 1 C2
C3225X5R1A226M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76k Resistor, Size 0805(4) 1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805(4) 1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805(4) 1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805(4) 1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1,Q2,
Q3,Q4
Si4433DY Vishay Siliconix
(5)
P-Channel MOSFET SO-8 4
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
01 02 smoauv smwanv Vw D7 an —c| R3 m EN GATE L $9 9:. 10m IOuF == 6 av 02 ca‘ 04‘ cs‘ cs nuns RZ‘ I: u GND GND
Micrel, Inc. MIC5159
June 2006
18
M9999-062706
Schematic G
Input/Output Combination Examples
Input Output Maximum Current
1.8V 1.5V 6A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
012345678910
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit Si34403DY x2 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1 C1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
C2,C3 GRM43 ER60J476K Murata 47µF, 6.3V Ceramic MLCC, Size 1812 1
C4,C5,C6 C4532X5R0J476M TDK 47µF, 6.3V Ceramic MLCC, Size 1812
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1,Q2 Si4403DY Vishay Siliconix
(5)
P-Channel MOSFET SO-8 2
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
0| V‘N su 31901752 Vow D LLL E R3 R‘ 5 ‘ 49.951 10kg 01 EN GATE 160$; ‘ IN FB 5 3 Is END 2 10W R2. 6 3v D I] EVD GND
Micrel, Inc. MIC5159
June 2006
19
M9999-062706
Schematic H
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 2.5A
3.3V 1.8V 1.25A
3.3V 1.5V 1A
3.3V 1.25V 0.75A
2.5V 1.8V 2.5A
2.5V 1.5V 2A
2.5V 1.25V 1.5A
1.8V 1.25V 3A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0 0.5 1 1.5 2 2.5 3 3.5 4
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit SUB15P01-52 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1
C2 C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805 1
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76K Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5K Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
R2
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1 SUB15P01-52 Vishay Siliconix
(5)
P-Channel MOSFET TO-263 1
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
0‘ oz sua‘spmrsz sustsPovsz Vw Van 4:! am 5 av c2 22”; s avnov n :1 SN D emu
Micrel, Inc. MIC5159
June 2006
20
M9999-062706
Schematic I
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 5A
3.3V 1.8V 2.5A
3.3V 1.5V 2A
3.3V 1.25V 1.75A
2.5V 1.8V 5.5A
2.5V 1.5V 4A
2.5V 1.25V 3A
1.8V 1.25V 6.5A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
012345678
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit SUB15P01-52 x2 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
C2 GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 1
C3225X5R1A226M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
R2 CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76K Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5K Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1,Q2 SUB15P01-52 Vishay Siliconix
(5)
P-Channel MOSFET TO-263 2
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
02 sua‘spursz 01 SUBIGPolrsz 03 SUBIGFDIVSZ Vam 4n (:2 22V; flaw av ‘5 GND 1, 11703 Hz' mm: 5 3V GND GND m m m) x‘s‘
Micrel, Inc. MIC5159
June 2006
21
M9999-062706
Schematic J
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 7.5A
3.3V 1.8V 3.75A
3.3V 1.5V 3A
3.3V 1.25V 2.75A
2.5V 1.8V 8A
2.5V 1.5V 6A
2.5V 1.25V 4.5A
1.8V 1.25V 9.5A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
024681012
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit SUB15P01-52 x3 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
C2, C3 GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 1
C3225X5R1A226M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
R2 CRCW08059761 Vishay Dale Output Voltage:2.5V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1,Q2
Q3
SUB15P01-52 Vishay Siliconix
(5)
P-Channel MOSFET TO-263 3
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
02 GA sua‘sponsz sua‘sponsz m 03 suatwaraz SUE‘SPOLsz/ Vw ‘ A E Vow a $3 “é 499!) mm u SEN GATE flawmv um A 53v m FE Ms (ND 11%;} R2' u savnvv E :1 GND GND m m m) X‘s;
Micrel, Inc. MIC5159
June 2006
22
M9999-062706
Schematic K
Input/Output Combination Examples
Input Output Maximum Current
3.3V 2.5V 10A
3.3V 1.8V 5A
3.3V 1.5V 4.25A
3.3V 1.25V 3.75A
2.5V 1.8V 11A
2.5V 1.5V 8A
2.5V 1.25V 6A
1.8V 1.5V 7A
1.8V 1.25V 13A
U1 MIC5159BM6/YM6
0
1
2
3
4
5
6
0 2.5 5 7.5 10 12.5 15
INPUT–OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Dropout
Max. Power
Dissipation at 60°C T
A
Application Circuit SUB15P01-52 x4 SOA
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 GRM40 X7R 106 6.3 Murata
(1)
10µF, 6.3V Ceramic MLCC, Size 0805 1
C2012X5RR0J106M TDK
(2)
10µF, 6.3V Ceramic MLCC, Size 0805
C2, C3 GRM42-2 X5R 226K 6.3 Murata 22µF, 6.3V Ceramic MLCC, Size 1210 2
C3225X5R1A226M TDK 22µF, 10V Ceramic MLCC, Size 1210
R1 CRCW08051002 Vishay Dale
(3)
10k Resistor, Size 0805 1
R2 CRCW08059761 Vishay Dale
Output Voltage:2.5V; 9.76k Resistor, Size 0805
(4)
1
CRCW08052152 Vishay Dale Output Voltage:1.8V; 21.5k Resistor, Size 0805
(4)
1
CRCW08054642 Vishay Dale Output Voltage:1.5V; 46.4k Resistor, Size 0805
(4)
1
CRCW08058253 Vishay Dale Output Voltage:1.25V; 825k Resistor, Size 0805
(4)
1
R3 CRCW080549R9 F Vishay Dale 49.9 Resistor, Size 0805 1
Q1, Q2
Q3, Q4
SUB15P01-52 Vishay Siliconix
(5)
P-Channel MOSFET TO-263 4
U1 MIC5159BM6/YM6 Micrel, Inc.
(6)
Programmable Current Limit µCap LDO Regulator 1
Notes:
1. Murata Tel: 949-916-4000
2. TDK Tel: 1-888-835-6646
3. Vishay Dale Tel: 402-563-6866
4. To calculate other output voltage values:
1
1.235
OUT
V
R1
R2
=
5. Vishay Siliconix Tel: 402-563-6866
6. Micrel, Inc. Tel: 408-944-0800
29mm 10 4% (1950 (£0950 E H E ' Pm m g, , Ma'm,,,,A, H H _ ”WM EH a snow) (5 runs) mu /£\ 1 5m; 75 u an Nan) 2 50:0 an anwzu :2 an) 51m New 1 mmmm. “a mum“. .r. u pg msx vnsm 1952 2 mm: Inrlnu: u. m- mm mm, :| We ,. «mug up m mom I)” .. ”mg dawn m tnm/lorm‘ )2 reverse mm/mm A m lnwucnglh menial-mg H mm m. m WE. pm. mum & Dxmcnlmn m: cxcmsm a! meld (lash Ac an: burr <2 m.)="" m="" «h="" m="" d15="" (max)="">
Micrel, Inc. MIC5159
June 2006
23
M9999-062706
Package Information
6-Pin SOT-23 (M6)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2004 Micrel, Incorporated.

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