LM2991QML

www.ti.com

SNVS392A – MARCH 2006 – REVISED OCTOBER 2011

LM2991QML Negative Low Dropout Adjustable Regulator

Check for Samples: LM2991QML

1

FEATURES

DESCRIPTION

The LM2991 is a low dropout adjustable negative

2

•

Output Voltage Adjustable From

−2V to −25V

regulator with a output voltage range between

−2V to

•

Output Current in Excess of 1A

−25V. The LM2991 provides up to 1A of load current

•

Dropout Voltage Typically 0.6V at 1A Load

and features a On /Off pin for remote shutdown

capability.

•

Low Quiescent Current

•

Internal Short Circuit Current Limit

The LM2991 uses new circuit design techniques to

provide a low dropout voltage, low quiescent current

•

Internal Thermal Shutdown with Hysteresis

and low temperature coefficient precision reference.

•

TTL, CMOS Compatible ON/OFF Switch

The dropout voltage at 1A load current is typically

•

Functional Complement to the LM2941 Series

0.6V and a ensured worst-case maximum of 1V over

the

entire

operating

temperature

range.

The

quiescent current is typically 1 mA with a 1A load

APPLICATIONS

current and an input-output voltage differential greater

•

Post Switcher Regulator

than 3V. A unique circuit design of the internal bias

•

Local, On-card, Regulation

supply limits the quiescent current to only 9 mA

(typical) when the regulator is in the dropout mode

•

Battery Operated Equipment

The LM2991 is short-circuit proof, and thermal

shutdown

includes

hysteresis

to

enhance

the

reliability of the device when inadvertently overloaded

for extended periods.

CONNECTION DIAGRAMS

Package Number NAC0016A (Top View)

16-Lead CLGA Package

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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 © 2006–2011, 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.