lt3021es8-trpbf Linear Technology Corporation, lt3021es8-trpbf Datasheet

lt3021es8-trpbf

Manufacturer Part Number

lt3021es8-trpbf

Description

500ma, Low Voltage, Very Low Dropout Linear Regulator

Manufacturer

Linear Technology Corporation

Datasheet

1.LT3021ES8-TRPBF.pdf (16 pages)

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APPLICATIO S

FEATURES

■

TYPICAL APPLICATIO

Low Current Regulators

Battery-Powered Systems

Cellular Phones

Pagers

Wireless Modems

Dropout Voltage: 160mV Typical

Output Current: 500mA

Adjustable Output (V

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-Lead

SO Packages

1.8V

Range: 0.9V to 10V

1.8V to 1.5V, 500mA VLDO Regulator

3.3µF

SHDN

REF

LT3021-1.5

GND

= V

SENSE

OUT

OUT(MIN)

3021 TA01

= 200mV)

3.3µF

1.5V

500mA

OUT

DESCRIPTIO

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 3.3µF. 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 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.

is a trademark of Linear Technology Corporation. All other trademarks are the property of

their respective owners.

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. VLDO

3021 is a very low dropout voltage (VLDO

500mA, Low Voltage,

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

–50

LT3021-1.5/LT3021-1.8

= 500mA

Very Low Dropout

–25

Minimum Input Voltage

LT3021/LT3021-1.2/

Linear Regulator

TEMPERATURE (°C)

100

3021 TA02

125

) linear

3021fb

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