LT3021

Features:

VIN Range: 0.9V to 10V
Dropout Voltage: 160mV Typical
Output Current: 500mA
Adjustable Output (VREF = VOUT(MIN) = 200mV)
Fixed Output Voltages: 1.2V, 1.5V, 1.8V
Stable with Low ESR, Ceramic Output Capacitors(3.3µF Minimum)
0.2% Load Regulation from 0mA to 500mA
Quiescent Current: 120µA (Typ)
3µA Typical Quiescent Current in Shutdown
Current Limit Protection
Reverse-Battery Protection
No Reverse Current
Thermal Limiting with Hysteresis
16-Pin DFN (5mm * 5mm) and 8-LeadSO Packages


Application

Low Current Regulators
Battery-Powered Systems
Cellular Phones
Pagers
Wireless Modems


Specifications

IN Pin Voltage ........................................................ ±10V
OUT Pin Voltage .................................................... ±10V
Input-to-Output Differential Voltage ....................... ±10V
ADJ/SENSE Pin Voltage ........................................ ±10V
SHDN Pin Voltage ................................................. ±10V
Output Short-Circut Duration.......................... Indefinite
Operating Junction Temperature Range
(Notes 2, 3) .......................................... 40°C to 125°C
Storage Temperature Range
DH .................................................... 65°C to 125°C
S8 ..................................................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C

Description

The LT®3021 is a very low dropout voltage (VLDOTM) linear regulator that operates from input supplies down to 0.9V.
This device supplies 500mA of output current with a typical dropout voltage of 160mV. The LT3021 is ideal for
low input voltage to low output voltage applications, providing comparable electrical efficiency to that of a
switching regulator. The LT3021 regulator optimizes stability and transient
response with low ESR, ceramic output capacitors as small as 3.3µF. Other LT3021 features include 0.05%
typical line regulation and 0.2% typical load regulation. In shutdown, quiescent current typically drops to 3µA.

Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting with hysteresis,
and reverse-current protection. The LT3021 is available as an adjustable output device with an output range down
the 200mV reference. Three fixed output voltages, 1.2V, 1.5V and 1.8V, are also available.
The LT3021 regulator is available in the low profile (0.75mm) 16-pin (5mm × 5mm) DFN package with exposed
pad and the 8-lead SO package.