LT3022 Datasheet, PDF (1/16 Pages) Linear Technology – 1A, 0.9V to 10V, Very Low Dropout Linear Regulator

Features
n _{VIN Range: 0.9V to 10V}
n _{Dropout Voltage: 145mV Typical}
n _{Output Current: 1A}
n _{Adjustable Output (VREF = VOUT(MIN) = 200mV)}
n _{Stable with Low ESR, Ceramic Output Capacitors}
(10µF Minimum)
n _{0.05% Typical Load Regulation from 1mA to 1A}
n _{Quiescent Current: 400µA Typical}
n _{7.5µA Typical Quiescent Current in Shutdown}
n _{Current Limit Protection}
n _{Reverse-Battery Protection with No Reverse Current}
n _{Thermal Limiting with Hysteresis}
n _{16-Lead (5mm × 3mm) DFN and MSOP Packages}
Applications
n _{High Efficiency Linear Regulators}
n _{Battery-Powered Systems}
n _{Logic Supplies}
n _{Post Regulator for Switching Supplies}
n _{Wireless Modems}
n _{FPGA Core Supplies}
LT3022
1A, 0.9V to 10V,
Very Low Dropout
Linear Regulator
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. Other LT3022 features include 0.05% typical line
regulation and 0.05% typical load regulation. In shutdown,
quiescent current typically drops to 7.5µA. Internal protec-
tion circuitry includes reverse-battery protection, current
limiting, thermal limiting with hysteresis and reverse-cur-
rent protection.
The LT3022 is available as an adjustable device with an
output voltage range down to the 200mV reference. The
LT3022 regulator is available in the thermally enhanced
low profile (0.75mm) 16-lead (5mm × 3mm) DFN and
MSOP packages.
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.
Typical Application
1.2V to 0.9V, 1A VLDO Regulator
V_IN
1.2V
IN
OUT
10µF
LT3022
698Ω
1%
V_OUT
0.9V
10µF ^1A
SHDN ADJ
GND
200Ω
1%
3022 TA01a
Minimum Input Voltage
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–50 –25
I_L = 1A
0 25 50 75
TEMPERATURE (°C)
100 125
3022 TA01b
3022f