LT3022/LT3022-1.2
LT3022-1.5/LT3022-1.8
1A, 0.9V to 10V,
Very Low Dropout
Linear Regulator
FEATURES
DESCRIPTION
The LT®3022 is a very low dropout voltage (VLDO™) linear
regulator that operates from single input supplies down to
0.9V. The device supplies 1A output current with 145mV
typical dropout voltage. The LT3022 is ideal for low input
voltage to low output voltage applications, providing
comparable electrical efficiency to a switching regulator.
The regulator optimizes stability and transient response
with low ESR ceramic output capacitors as small as 10µF.
OtherLT3022featuresinclude0.05%typicallineregulation
and0.05%typicalloadregulation. Inshutdown, quiescent
currenttypicallydropsto7.5µA.Internalprotectioncircuitry
includes reverse-battery protection, current limiting, ther-
mallimitingwithhysteresisandreverse-currentprotection.
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V Range: 0.9V to 10V
IN
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Dropout Voltage: 145mV Typical
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Output Current: 1A
Adjustable Output (V
Fixed Output Voltages: 1.2V, 1.5V, 1.8V
Stable with Low ESR, Ceramic Output Capacitors
(10µF Minimum)
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= V
= 200mV)
OUT(MIN)
REF
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0.05% Typical Load Regulation from 1mA to 1A
Quiescent Current: 400µA Typical
7.5µA Typical Quiescent Current in Shutdown
Current Limit Protection
Reverse-Battery Protection with No Reverse Current
Thermal Limiting with Hysteresis
16-Lead (5mm × 3mm) DFN and MSOP Packages
The LT3022 is available as an adjustable device with
an output voltage range down to the 200mV reference.
Three fixed output voltages, 1.2V, 1.5V and 1.8V are also
offered. The LT3022 regulator is available in the thermally
enhanced low profile (0.75mm) 16-lead (5mm × 3mm)
DFN and MSOP packages.
APPLICATIONS
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High Efficiency Linear Regulators
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Battery-Powered Systems
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Logic Supplies
Post Regulator for Switching Supplies
Wireless Modems
FPGA Core Supplies
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. VLDO is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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TYPICAL APPLICATION
Minimum Input Voltage
1.1
I
= 1A
L
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1.2V to 0.9V, 1A VLDO Regulator
V
0.9V
1A
OUT
V
IN
IN
OUT
ADJ
1.2V
698Ω
1%
10µF
10µF
LT3022
SHDN
GND
200Ω
1%
3022 TA01a
–50
0
25
50
75 100 125
–25
TEMPERATURE (°C)
3022 TA01b
3022fb
1