LP2978IM5X-3.8 Datasheet

IC型號(hào)：
LP2978IM5X-3.8
PDF描述：
Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout Regulator
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106.28KB
PDF頁(yè)數(shù)：
7頁(yè)
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NSC

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LP2978 Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout Regulator

July 2000

LP2978

Micropower SOT, 50 mA Low-Noise Ultra Low-Dropout

Regulator

Designed for Use with Very Low ESR Output Capacitors

General Description

The LP2978 is a 50 mA, fixed-output voltage regulator de-

signed to provide ultra low-dropout and low noise in battery

powered applications.

Using an optimized VIP

鈩?/div>

(Vertically Integrated PNP) pro-

cess, the LP2978 delivers unequalled performance in all

specifications critical to battery-powered designs:

Dropout Voltage:

Typically 120 mV

50 mA load, and 7 mV

1 mA load.

Ground Pin Current:

Typically 350 碌A(chǔ)

50 mA load, and

75 碌A(chǔ)

1 mA load.

Enhanced Stability:

The LP2978 is stable with output ca-

pacitor ESR as low as 5 m鈩? which allows the use of ceramic

capacitors on the output.

Sleep Mode:

Less than 1 碌A(chǔ) quiescent current when

ON/OFF pin is pulled low.

Smallest Possible Size:

SOT-23 package uses absolute

minimum board space.

Precision Output:

1% tolerance output voltages available

(A grade).

Low Noise:

By adding a 10 nF bypass capacitor, output

noise can be reduced to 30 碌V (typical).

Features

Ultra low dropout voltage

Smallest possible size (SOT-23 Package)

Requires minimum external components

Stable with low-ESR output capacitor

1 碌A(chǔ) quiescent current when shut down

Low ground pin current at all loads

Output voltage accuracy 1% (A Grade)

High peak current capability

Wide supply voltage range (16V max)

Low Z

OUT

: 0.3鈩?typical (10 Hz to 1 MHz)

Overtemperature/overcurrent protection

鈭?0藲C to +125藲C junction temperature range

Custom voltages available

Applications

Cellular Phone

Palmtop/Laptop Computer

Personal Digital Assistant (PDA)

Camcorder, Personal Stereo, Camera

Block Diagram

DS100935-1

VIP

鈩?/div>

is a trademark of National Semiconductor Corporation.

漏 2000 National Semiconductor Corporation

DS100935

www.national.com

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