2.22F

SHDN

GND

IN

OUT

FAULT

100k

2.22F

CERAMIC

CC

33n

F

LP3982

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SNVS185D – FEBRUARY 2002 – REVISED APRIL 2013

LP3982 Micropower, Ultra Low-Dropout, Low-Noise, 300 mA CMOS Regulator

Check for Samples: LP3982

1

FEATURES

DESCRIPTION

The

LP3982

low-dropout

(LDO)

CMOS

linear

2

•

MAX8860 Pin, Package and Spec. Compatible

regulator is available in 1.8V, 2.5V, 2.77V, 2.82V,

•

WSON Space Saving Package

3.0V, 3.3V, and adjustable versions. They deliver 300

•

300 mA Output Current

mA of output current. Packaged in an 8-Pin VSSOP,

the LP3982 is pin and package compatible with

•

120 mV Typical Dropout @ 300 mA

Maxim's MAX8860. The LM3982 is also available in

•

90

μA Typical Quiescent Current

the small footprint WSON package.

•

1 nA Typical Shutdown Mode

The

LP3982

suits

battery-powered

applications

•

60 dB Typical PSRR

because of its shutdown mode (1nA typ), low

•

2.5V to 6V Input Range

quiescent current (90

μA typ), and LDO voltage (120

mV typ). The low dropout voltage allows for more

•

120

μs Typical Turn-on Time

utilization of a battery’s available energy by operating

•

Stable with Small Ceramic Output Capacitors

closer to its end-of-life voltage. The LP3982's PMOS

•

37

μV RMS Output Voltage Noise (10 Hz to 100

output transistor consumes relatively no drive current

kHz)

compared to PNP LDO regulators.

•

Over-Temperature/Over-Current Protection

This PMOS regulator is stable with small ceramic

•

±2% Output Voltage Tolerance

capacitive loads (2.2

μF typ).

These devices also include regulation fault detection,

APPLICATIONS

a bandgap voltage reference, constant current limiting

and thermal overload protection.

•

Wireless Handsets

•

DSP Core Power

•

Battery Powered Electronics

•

Portable Information Appliances

Application Circuit

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.