LM2936

Ultra-Low Quiescent Current LDO Voltage Regulator

General Description

The LM2936 ultra-low quiescent current regulator features

low dropout voltage and low current in the standby mode.

With less than 15 µA quiescent current at a 100 µA load, the

LM2936 is ideally suited for automotive and other battery

operated systems. The LM2936 retains all of the features

that are common to low dropout regulators including a low

dropout PNP pass device, short circuit protection, reverse

battery protection, and thermal shutdown. The LM2936 has

a 40V maximum operating voltage limit, a −40˚C to +125˚C

ance over the entire output current, input voltage, and tem-

perature range. The LM2936 is available in a TO-92 pack-

age, SO-8 and SOT–23 surface mount packages, and a

TO-252 surface mount power package.

Features

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Ultra low quiescent current (I

Q

≤ 15 µA for I

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Fixed 3.0V, 3.3V or 5.0V with 50 mA output

2% Initial output tolerance

3% Output tolerance over line, load, and temperature

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Reverse battery protection

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−50V reverse transient protection

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Internal short circuit current limit

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Internal thermal shutdown protection

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40V operating voltage limit

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60V operating voltage limit for LM2936HV

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Shutdown Pin available with LM2936BM package

Typical Application

00975901

* Required if regulator is located more than 2" from power supply filter capacitor.

** Required for stability. See Electrical Characteristics for required values. Must be rated over intended operating temperature range. Effective series

resistance (ESR) is critical, see curve. Locate capacitor as close as possible to the regulator output and ground pins. Capacitance may be increased

without bound.

October 2006

© 2006 National Semiconductor Corporation

DS009759

www.national.com