High Performance LDOs Selector Card Datasheet by Analog Devices Inc.

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Linear Technology’s high performance low dropout linear regulators (LDOs) offer very low dropout, fast
transient response, ultralow noise, ultrahigh PSRR, excellent line and load regulation and have a very wide input voltage range,
from 0.9V to 80V. Output currents range from 100mA to 10A, with positive, negative and multiple outputs. LDO+™ devices provide
additional functionality and features beyond the basic linear regulator performance. Functionality may include voltage, current
and temperature monitoring, diagnostic information and features such as programmable current limit, active output discharge
or the ability to control an upstream supply powering the LDO (VIOC).
LT
®
3042 – 20V, 200mA, Ultralow Noise,
Ultrahigh PSRR RF Linear Regulator
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Ultralow RMS Noise: 0.8μVRMS (10Hz to 100kHz)
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Ultralow Spot Noise: 2nV/√Hz at 10kHz
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Ultrahigh PSRR: 79dB at 1MHz
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Wide Input Voltage Range: 1.8V to 20V
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Single Capacitor Improves Noise and PSRR
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100μA SET Pin Current: ±1% Initial Accuracy
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10-Lead MSOP and 3mm × 3mm DFN Packages
Ultralow Noise, Ultrahigh PSRR LDOs
High Performance Low Dropout
Linear Regulators (LDOs)
LT3045 – 20V, 500mA, Ultralow Noise,
Ultrahigh PSRR RF Linear Regulator
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Ultralow RMS Noise: 0.8μVRMS (10Hz to 100kHz)
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Ultralow Spot Noise: 2nV/√Hz at 10kHz
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Ultrahigh PSRR: 76dB at 1MHz
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Wide Input Voltage Range: 1.8V to 20V
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Single Capacitor Improves Noise and PSRR
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100μA SET Pin Current: ±1% Initial Accuracy
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12-Lead MSOP and 3mm × 3mm DFN Packages
(DFN is Pin Compatible with LT3042)
Part
Number VIN Range VOUT Range IOUT
Dropout
Voltage PSRR at 1MHz Output Noise Spot Noise Packages
LT3042 1.8V − 20V 0V − 15V 200mA 350mV 79dB 0.8µVRMS 2nV/√Hz MSOP-10, 3 × 3 DFN-10*
LT3045 1.8V – 20V 0V − 15V 500mA 280mV 76dB 0.8µVRMS 2nV/√Hz MSOP-12, 3 × 3 DFN-10*
* Pin Compatible.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and LDO+ is a
trademark of Analog Devices, Inc. All other trademarks are the property of their respective owners.
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LDO+ Family – High Performance with Extra Features
LDO+ devices provide additional functionality and features beyond the basic linear regulator performance. Functionality may include
wide safe operating area (SOA), voltage, current and temperature monitoring, diagnostic information and features such as programmable
current limit, active output discharge or the ability to control an upstream supply powering the LDO (VIOC).
LT3086 − 40V, 2.1A Low Dropout Adjustable
Linear Regulator with Monitoring and
Cable Drop Compensation
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Wide Input Voltage Range: 1.4V to 40V
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1 Resistor Sets Output Voltage: 0.4V to 32V
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±2% Tolerance Over Line, Load and Temperature
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Output Current Monitor: IMON = IOUT/1000
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Temperature Monitor with Programmable Thermal Limit
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Programmable Cable Drop Compensation
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Parallel Multiple Devices for Higher Current
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Dropout Voltage: 330mV
LT3081 − 1.5A Single Resistor Rugged Linear
Regulator with Monitors
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Extended Safe Operating Area (SOA)
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Stable with or without Input/Output Capacitors
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Wide Input Voltage Range: 1.2V to 36V
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Single Resistor Sets Output Voltage
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Output Current Monitor: IMON = IOUT/5000
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Junction Temperature Monitor: 1μA/°C
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Output Adjustable to 0V
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50μA SET Pin Current: 1% Initial Accuracy
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Output Voltage Noise: 27μVRMS
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Parallel Multiple Devices for Higher Current or Heat Spreading
Part
Number
VIN
Min
(V)
VIN
Max
(V)
Output
Current
(A)
Output
Voltage
Dropout
Voltage
(V) Typ Features Packages
LT3050 1.6 45 0.1 Adj, 3.3, 5 0.34 Output Current Monitor, Shutdown 3 × 2 DFN-12, MSOP-12E
LT3061 1.6 45 0.1 Adj 0.25 Active Output Discharge, Shutdown 2 × 3 DFN-8, MSOP-8E
LT3042 1.8 20 0.2 Adj 0.35 Ultralow Noise, Ultrahigh PSRR, Current Source Reference, Output Current
Monitor, Power Good, Shutdown
3 × 3 DFN-10, MSOP-10E
LT3045 1.8 20 0.5 Adj 0.26 Ultralow Noise, Ultrahigh PSRR, Current Source Reference, Output Current
Monitor, Power Good, Shutdown
3 × 3 DFN-10, MSOP-12E
LT3063 1.6 45 0.2 Adj 0.3 Active Output Discharge, Shutdown 2 × 3 DFN-8, MSOP-8E
LT3055 2 45 0.5 Adj 0.35 Power Good, Output Current Monitor, Temperature Monitor, Shutdown 4 × 3 DFN-16, MSOP-16E
LT3066 1.8 45 0.5 Adj 0.3 Active Output Discharge, Shutdown 4 × 3 DFN-12, MSOP-12E
LT3090 –36 –1.5 0.6 –Adj 0.3 Current Source Reference, Output Current Monitor, Cable Drop Compensation, Shutdown 3 × 3 DFN-10, MSOP-12E
LT3089 1.2 36 0.8 Adj 1.47 Current Source Reference, Cable Drop Compensation, Temperature Monitor,
Output Current Monitor
4 × 4 DFN-12, DDPAK-7, TSSOP-16E
LT3081 1.2 36 1.5 Adj 1.21 Current Source Reference, Cable Drop Compensation, Temperature Monitor,
Output Current Monitor
4 × 4 DFN-12, DDPAK-7, TO-220, TSSOP-16E
LT3091 –36 –1.5 1.5 –Adj 0.3 Current Source Reference, Cable Drop Compensation, Output Current Monitor, Shutdown 4 × 3 DFN-14, DDPAK-7, TO-220, TSSOP-16E
LT3086 1.4 40 2.1 Adj 0.33 Current Source Reference, Power Good, Output Current Monitor, Temperature
Monitor, Cable Drop Compensation, Shutdown
5 × 4 DFN-16, DDPAK-7, TO-220, TSSOP-16E
LT3070 0.95 3 5 Adj 0.085 Digitally Programmable, Margining, Separate Bias Pin, Power Good 4 × 5 QFN-28
LT3071 0.95 3 5 Adj 0.085 Digitally Programmable, Margining, Separate Bias Pin, Power Good, Output
Current Monitor
4 × 5 QFN-28
GND
IN OUT
SET
CABLE
COMP
RPWRGD
PWRGD
SHDN
TEMP
TRACK
IMON
ILIM PWRGD
To ADC
L
O
A
D
CABLE
VOUT
RLINE1
RLINE2
VLOAD: 0.4V to
32V@2.1A
VIN: 2V to 40V
Tight Output Regulation
±2% Over Everything
Temp. Monitor
10mV/°C
LT3086
Cable Drop
Compensation
Current
Monitor mA/A Power Good
RMON
350
93k
82k 100k
CDC
SET
0916
www.linear.com/HPLDOs n 1-800-4-LINEAR