LM2940QML, LM2940QML-SP

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SNVS389B – MAY 2010 – REVISED MAY 2013

LM2940QML 1A Low Dropout Regulator

Check for Samples: LM2940QML, LM2940QML-SP

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FEATURES

DESCRIPTION

The LM2940 positive voltage regulator features the

2

•

Available with Radiation Ensure

ability to source 1A of output current with a dropout

–

ELDRS Free 100 krad(Si)

voltage of typically 0.5V and a maximum of 1V over

•

the

entire

temperature

range.

Furthermore,

a

quiescent current reduction circuit has been included

•

Output Current in Excess of 1A

which

reduces

the

ground

current

when

the

•

Output Voltage Trimmed Before Assembly

differential between the input voltage and the output

•

Reverse Battery Protection

voltage exceeds approximately 3V. The quiescent

current with 1A of output current and an input-output

•

Internal Short Circuit Current Limit

differential of 5V is therefore only 30 mA. Higher

•

Mirror Image Insertion Protection

quiescent currents only exist when the regulator is in

Designed also for vehicular applications, the LM2940

and all regulated circuitry are protected from reverse

battery installations or 2-battery jumps. During line

transients, such as load dump when the input voltage

can momentarily exceed the specified maximum

operating voltage, the regulator will automatically shut

down to protect both the internal circuits and the load.

The LM2940 cannot be harmed by temporary mirror-

image insertion. Familiar regulator features such as

short circuit and thermal overload protection are also

provided.

CONNECTION DIAGRAMS

Figure 1. 16-Lead Ceramic Surface-Mount Package (CFP) Top View

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PRODUCTION DATA information is current as of publication date.

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Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.