LT3022_12 Datasheet, PDF (1/20 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 _{Fixed Output Voltages: 1.2V, 1.5V, 1.8V}
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/LT3022-1.2
LT3022-1.5/LT3022-1.8
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 protection circuitry
includes reverse-battery protection, current limiting, ther-
mal limiting with hysteresis and reverse-current protection.
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.
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
3022fb
1