MIC803 Datasheet by Microchip Technology

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MIC803
3-Pin Microprocessor Supervisor Circuit
with Open-Drain Reset Output
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
August 3, 2015
Revision 1.2
General Description
The MIC803 is a single-voltage supervisor with open-drain
reset output that provides accurate power supply
monitoring and reset generation in microprocessor-based
systems. The function of the device is to assert a reset
signal if the power supply voltage drops below the reset
threshold voltage, and retain this reset for the reset
timeout period once the power supply increases above the
reset threshold voltage.
The MIC803 consumes only 4.5µA of supply current and
offers three reset delay periods of 20ms, 140ms, and
1120ms (minimum). It features factory-programmed reset
threshold levels from 2.63V to 4.63V to accommodate
3.0V, 3.3V, and 5.0V power supplies. It is available in the
compact 3-pin SC-70 and SOT-23 packages.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
4.5μA supply current (typical) at 3.6V
Open-drain /RESET output
/RESET remains valid with VCC as low as 1V
20ms, 140ms, or 1120ms (minimum) reset timeout
options
2.63V to 4.63V preset voltage threshold options
2.5% voltage threshold accuracy over temperature
3-pin SC70-3 package (2.0mm × 2.1mm)
3-pin SOT-23 package (2.3mm × 2.9mm)
-40˚C to +125˚C junction temperature range
Applications
Critical microcomputer power monitoring
Portable equipment
Solid state drives
Printers/computers
Embedded controllers
Typical Application
V
CC
100k
V
CC
RESET
V
CC
µPMIC803
GND GND
RESET
MIC803
August 3, 2015
2 Revision 1.2
Ordering Information(1)
Part Number Marking(2) Nominal
VTH (V) Minimum
tRESET(3) (ms) Junction Temperature Range Package
MIC803-46D2VC3 AS 4.63 20 40° to +125°C SC70-3
MIC803-44D2VC3 AP 4.38 20 40° to +125°C SC70-3
MIC803-41D2VC3 AK 4.10 20 40° to +125°C SC70-3
MIC803-40D2VC3 A2 4.00 20 40° to +125°C SC70-3
MIC803-31D2VC3 AG 3.08 20 40° to +125°C SC70-3
MIC803-30D2VC3 AV 3.00 20 40° to +125°C SC70-3
MIC803-29D2VC3 AD 2.93 20 40° to +125°C SC70-3
MIC803-26D2VC3 AA 2.63 20 40° to +125°C SC70-3
MIC803-46D3VC3 AT 4.63 140 40° to +125°C SC70-3
MIC803-44D3VC3 AQ 4.38 140 40° to +125°C SC70-3
MIC803-41D3VC3 AM 4.10 140 40° to +125°C SC70-3
MIC803-40D3VC3 A5 4.00 140 40° to +125°C SC70-3
MIC803-31D3VC3 A4 3.08 140 40° to +125°C SC70-3
MIC803-30D3VC3 AX 3.00 140 40° to +125°C SC70-3
MIC803-29D3VC3 AE 2.93 140 40° to +125°C SC70-3
MIC803-26D3VC3 AB 2.63 140 40° to +125°C SC70-3
MIC803-46D4VC3 AU 4.63 1120 40° to +125°C SC70-3
MIC803-44D4VC3 AR 4.38 1120 40° to +125°C SC70-3
MIC803-41D4VC3 AN 4.10 1120 40° to +125°C SC70-3
MIC803-40D4VC3 A6 4.00 1120 40° to +125°C SC70-3
MIC803-31D4VC3 AJ 3.08 1120 40° to +125°C SC70-3
MIC803-30D4VC3 AZ 3.00 1120 40° to +125°C SC70-3
MIC803-29D4VC3 A3 2.93 1120 40° to +125°C SC70-3
MIC803-26D4VC3 AC 2.63 1120 40° to +125°C SC70-3
MIC803-46D2VM3 AS 4.63 20 40° to +125°C SOT23-3
MIC803-44D2VM3 AP 4.38 20 40° to +125°C SOT23-3
MIC803-41D2VM3 AK 4.10 20 40° to +125°C SOT23-3
MIC803-40D2VM3 A2 4.00 20 40° to +125°C SOT23-3
MIC803-31D2VM3 AG 3.08 20 40° to +125°C SOT23-3
MIC803-30D2VM3 AV 3.00 20 40° to +125°C SOT23-3
MIC803-29D2VM3 AD 2.93 20 40° to +125°C SOT23-3
MIC803-26D2VM3 AA 2.63 20 40° to +125°C SOT23-3
MIC803-46D3VM3 AT 4.63 140 40° to +125°C SOT23-3
Note:
1. All devices available in tape and reel only. (Order entry PN, add TR. Example: MIC803-26D4VM3 TR)
Standard/full reel quantity is 3,000 pieces.
Reel diameter is 7 inches. Hub diameter is 2 inches. Width is 8mm.
2. Underbar symbol (_) may not be to scale.
3. 40° to +85°C temperature range.
MICBOGASDZVCC! TR [ vm DES‘GNATOR t 46 = 4 63V 44 = 435v 41 : mov 40 : 4 oov 31 = 3 08V 30 : 3 00v 29 : 293v 26 : 253v flL DESIGNATOR JUNCTION TEMPERATURE my D2 = 20m: RANGE —40“C TO *125°C D 14Dms D4 = 1120ms PACKAGE DESIGNATOR TAPE AND REEL DESIGNATOR C3 = 3570:! M3 : SOT23»3 TR = 3 000 PIECES/REEL
MIC803
August 3, 2015
3 Revision 1.2
Ordering Information(1) (Continued)
Part Number Marking(2) Nominal
VTH (V) Minimum
tRESET(3) (ms) Junction Temperature Range Package
MIC803-44D3VM3 AQ 4.38 140 40° to +125°C SOT23-3
MIC803-41D3VM3 AM 4.10 140 40° to +125°C SOT23-3
MIC803-40D3VM3 A5 4.00 140 40° to +125°C SOT23-3
MIC803-31D3VM3 A4 3.08 140 40° to +125°C SOT23-3
MIC803-30D3VM3 AX 3.00 140 40° to +125°C SOT23-3
MIC803-29D3VM3 AE 2.93 140 40° to +125°C SOT23-3
MIC803-26D3VM3 AB 2.63 140 40° to +125°C SOT23-3
MIC803-46D4VM3 AU 4.63 1120 40° to +125°C SOT23-3
MIC803-44D4VM3 AR 4.38 1120 40° to +125°C SOT23-3
MIC803-41D4VM3 AN 4.10 1120 40° to +125°C SOT23-3
MIC803-40D4VM3 A6 4.00 1120 40° to +125°C SOT23-3
MIC803-31D4VM3 AJ 3.08 1120 40° to +125°C SOT23-3
MIC803-30D4VM3 AZ 3.00 1120 40° to +125°C SOT23-3
MIC803-29D4VM3 A3 2.93 1120 40° to +125°C SOT23-3
MIC803-26D4VM3 AC 2.63 1120 40° to +125°C SOT23-3
Part Numbering Convention
GNDE RESET E GNDE RESET E EVCC
MIC803
August 3, 2015
4 Revision 1.2
Pin Configuration
3-Pin SC70
(Top View)
3-Pin SOT-23
(Top View)
Pin Description
Pin Number Pin Name Pin Function
1 GND Ground Pin.
2 /RESET /RESET goes low if VCC falls below the reset threshold (VTH), and remains asserted for one timeout
period after VCC exceeds VTH.
3 VCC Power Supply Input and Monitored Voltage.
MIC803
August 3, 2015
5 Revision 1.2
Absolute Maximum Ratings(4)
Supply Voltage (VCC) ...................................... 0.3V to 6.0V
Reset Output (/RESET) .................................. 0.3V to 6.0V
Input Current (VCC) ...................................................... 20mA
Output Current (/RESET) ............................................ 20mA
Rate of Rise (VCC) ................................................... 100V/µs
Junction Temperature (TJ)…………………………....+150°C
Lead Temperature (soldering, 10s) ............................ 260°C
Storage Temperature (TS) ......................... 65°C to +150°C
ESD Rating(6) .................................................................. 3kV
Operating Ratings(5)
Supply Voltage (VCC) ........................................ 1.0V to 5.5V
Reset Output Voltage (/RESET) ...................... 0.0V to 5.5V
Junction Temperature (TJ) ........................ 40°C to +125°C
Junction Thermal Resistance
3-Pin SC70 (θJA) .............................................. 260°C/W
3-Pin SOT-23 (θJA) ........................................... 203°C/W
Electrical Characteristics(7)
For typical values, VCC = 5.0V for MIC803-46/44/41/40, VCC = 3.3V for MIC803-31/30/29, VCC = 3.0V for MIC803-26; TJ = 25°C,
Bold values indicate 40°C TJ +125°C; unless noted.
Parameter Conditions Min. Typ. Max. Units
Power Supply Input
Operating Voltage Range (VCC) TJ = –40˚C to +85˚C 1.0 5.5 V
TJ = –40˚C to +125˚C 1.2 5.5
Supply Current (ICC)
TJ = –40˚C to +85˚C VCC = 5.5V, No Load 5.5 15
µA
VCC = 3.6V, No Load 4.5 10
TJ = +85˚C to +125˚C VCC = 5.5V, No Load 18
VCC = 3.6V, No Load 13
Voltage Threshold
Reset Threshold (VTH)
MIC803-46 TJ = –40˚C to +85˚C 4.50 4.63 4.75
V
TJ = –40˚C to +125˚C 4.44 4.82
MIC803-44 TJ = –40˚C to +85˚C 4.25 4.38 4.50
TJ = –40˚C to +125˚C 4.20 4.56
MIC803-41 TJ = –40˚C to +85˚C 4.00 4.10 4.20
TJ = -40˚C to +125˚C 3.97 4.24
MIC803-40 TJ = –40˚C to +85˚C 3.89 4.00 4.10
TJ = –40˚C to +125˚C 3.80 4.20
MIC803-31 TJ = –40˚C to +85˚C 3.00 3.08 3.15
TJ = –40˚C to +125˚C 2.95 3.21
Notes:
4. Exceeding the absolute maximum ratings may damage the device.
5. The device is not guaranteed to function outside its operating ratings.
6. Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5k in series with 100pF.
7. Specification for packaged product only.
MIC803
August 3, 2015
6 Revision 1.2
Electrical Characteristics(7) (Continued)
For typical values, VCC = 5.0V for MIC803-46/44/41/40, VCC = 3.3V for MIC803-31/30/29, VCC = 3.0V for MIC803-26; TJ = 25°C,
Bold values indicate 40°C TJ +125°C; unless noted.
Parameter Conditions Min. Typ. Max. Units
Voltage Threshold (Continued)
Reset Threshold (VTH)
MIC803-30 TJ = –40˚C to +85˚C 2.93 3.00 3.08
V
TJ = –40˚C to +125˚C 2.90 3.11
MIC803-29 TJ = –40˚C to +85˚C 2.82 2.93 3.00
TJ = –40˚C to +125˚C 2.81 3.05
MIC803-26 TJ = –40˚C to +85˚C 2.55 2.63 2.70
TJ = –40˚C to +125˚C 2.50 2.76
Reset Time
VCC to /RESET Delay (tD) VCC = VTH to (VTH100mV) 15 µs
Reset Timeout Period (tRESET)
D2 TJ = –40˚C to +85˚C 20 35 44
ms
TJ = –40˚C to +125˚C 16 48
D3 TJ = –40˚C to +85˚C 140 230 360
TJ = –40˚C to +125˚C 112 420
D4 TJ = –40˚C to +85˚C 1120 1800 2400
TJ = –40˚C to +125˚C 900 3200
Reset Output
/RESET Output Voltage (VOL)
VCC 4.0V, ISINK = 3.2mA 0.4 V
VCC > 2.5V, ISINK = 1.2mA 0.3 V
VCC 1.0V, ISINK = 50µA 0.3 V
/RESET Output Leakage VCC > VTH, /RESET Deasserted 1 μA
MIC803
August 3, 2015
7 Revision 1.2
Typical Characteristics
V
CC
Operating Supply Current
vs. Temperature
3
4
5
6
7
-50 -20 10 40 70 100 130
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
V
CC
= 3.6V
V
CC
to /RESET Delay
vs. Temperature
0
5
10
15
20
25
30
-50 -20 10 40 70 100 130
TEMPERATURE (°C)
V
CC
to /RESET DELAY (µs)
V
CC
= V
TH
to V
TH
-100mV
Reset Timeout Period (D3)
vs. Temperature
200
220
240
260
280
300
-50 -20 10 40 70 100 130
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
V
CC
= 5.5V
Normalized Reset Threshold
vs. Temperature
0.988
0.992
0.996
1.000
1.004
-50 -20 10 40 70 100 130
TEMPERATURE (°C)
NORMALIZED RESET
THRESHOLD (V)
VCC Operating Supply Current
vs. Supply Voltage
0
2
4
6
8
0123456
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
V
TH
= 2.93V
Maximum Transient Duration
vs Overdrive
0
10
20
30
40
50
0200 400 600 800 1000
OVERDRIVE VOLTAGE, V
TH
- V
CC
(mV)
MAXIMUM TRANSIENT
DURATION (µs)
V
TH
= 2.93V
MIC803
August 3, 2015
8 Revision 1.2
Timing Diagram
V
CC
V
TH
RESET
0V
V
OL
t
RESET
t
D
t
RESET
Functional Diagram
RESET
GENERATOR
V
CC
(3)
GND (1)
RESET (2)
MIC803
+
-
V
TH
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MIC803
August 3, 2015
9 Revision 1.2
Application Information
Microprocessor Reset
The /RESET pin is asserted whenever VCC falls below the
reset threshold voltage, VTH. The /RESET pin remains
asserted for the duration of the reset timeout period
(tRESET) after VCC has risen above the reset threshold
voltage. The reset function ensures the microprocessor is
properly reset and powers up in a known condition after a
power failure. /RESET will remain valid with VCC as low
as 1.0V.
The /RESET output is a simple open-drain N-channel
MOSFET structure. A pull-up resistor must be used to
pull this output up to some voltage. For most applications,
this voltage will be the same power supply that supplies
VCC to the MIC803. As shown in Figure 1, it is possible,
however, to tie this resistor to some other voltage. This
will allow the MIC803 to monitor one voltage while level-
shifting the /RESET output to some other voltage. The
pull-up voltage must be limited to 5.5V. The resistor must
be small enough to supply current to the inputs and
leakage paths that are driven by the /RESET output.
V
CC
100k
+3.3V
RESET
V
CC
µP
MIC803
GND GND
RESET
+5V
Figure 1. MIC803 Used in a Multiple Supply System
/RESET Valid at Low Voltage
As VCC drops to 0V, the MIC803 will no longer be able to
pull the /RESET output low, and the pull-up resistor will
pull the output high. The value of the pull-up resistor and
the voltage it is connected to will affect the point at which
this happens.
Figure 2. /RESET at Falling VCC
Wire ORing the /RESET Output
Since the /RESET output is open-drain, several reset
sources can be wire-ORed, in parallel, to allow resets
from multiple sources.
VCC Transients
The MIC803 is relatively immune to negative-going VCC
glitches below the reset threshold (see Typical
Characteristics, graph titled “Maximum Transient
Duration vs. Overdrive”). As shown in Figure 3, the
overdrive voltage is the difference between the threshold
voltage and the minimum point of the VCC glitch.
Typically, an overdrive of 100mV, with duration of 15μs or
less will not cause a reset. If additional transient immunity
is needed, a 0.1μF bypass capacitor can be placed as
close as possible to the MIC803 on the VCC pin.
Figure 3. VCC Threshold
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MIC803
August 3, 2015
10 Revision 1.2
Package Information and Recommended Landing Pattern(8)
3-Pin SC70 (MM)
Note:
8. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
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MIC803
August 3, 2015
11 Revision 1.2
Package Information and Recommended Landing Pattern(8)
3-Pin SOT-23 (MM)
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MIC803
August 3, 2015
12 Revision 1.2
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
Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high pe
rformance linear and power, LAN, and timing & comm
unications
markets. The Company’s products include advanced mixed
-signal, analog & power semiconductors; high-
performance communication, clock
management,
MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs.
Company customers
include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer produ
cts.
Corporation headquarters and state
-of-the-art wafer fabrication facilities are located in
San Jose, CA, with regional sales and support offices and
advanced technology design centers situated throughout the Americas, Europe
, and Asia. Additionally
, the Company maintains an extensive network
of distributors and reps worldwide.
Micrel makes no
representations or warranties with respect to the accuracy or completeness of the information furnished in this data
sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use.
Micrel reserves the right to
change circuitry,
specifications and descriptions at any time without notice.
No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights
is granted by this document. Except as provided in Micrel’s terms and
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whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including
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