1

LT3021/LT3021-1.2/

LT3021-1.5/LT3021-1.8

3021fa

TEMPERATURE (

°C)

–50

1.1

1.0

0.9

0.8

0.6

0.7

0.5

0.4

0.3

0.2

0.1

0

3021 TA02

25

0

–25

50

75

125

100

APPLICATIO S

FEATURES

TYPICAL APPLICATIO

DESCRIPTIO

500mA, Low Voltage,

Very Low Dropout

Linear Regulator

■

Output Current: 500mA

■

Stable with Low ESR, Ceramic Output Capacitors

(3.3

µF Minimum)

■

Quiescent Current: 120

µA (Typ)

µA Typical Quiescent Current in Shutdown

■

Reverse-Battery Protection

■

16-Pin DFN (5mm

× 5mm) and 8-Lead

SO Packages

1.8V to 1.5V, 500mA VLDO Regulator

■

Battery-Powered Systems

■

Wireless Modems

The LT

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 3.3

µF. Other LT3021 features include 0.05%

typical line regulation and 0.2% typical load regulation. In

shutdown, quiescent current typically drops to 3

µA.

Internal protection circuitry includes reverse-battery pro-

tection, current limiting, thermal limiting with hysteresis,

and reverse-current protection. The LT3021 is available as

an adjustable output device with an output range down to

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 ex-

posed pad and the 8-lead SO package.

IN

SHDN

SENSE

3.3

µF

3021 TA01

OUT

1.8V

GND

LT3021-1.5

1.5V

500mA

3.3

µF

Minimum Input Voltage

, LTC and LT 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.