LM2990T-5.2 National Semiconductor, LM2990T-5.2 Datasheet

LM2990T-5.2

Manufacturer Part Number

LM2990T-5.2

Description

IC,VOLT REGULATOR,FIXED,-5.2V,BIPOLAR,SIP,3PIN,PLASTIC

Manufacturer

National Semiconductor

Datasheets

1.LM2990S-12.pdf (13 pages)

2.LM2990S-12.pdf (12 pages)

3.LM2990S-12.pdf (12 pages)

Specifications of LM2990T-5.2

Rohs Compliant

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LM2990

Negative Low Dropout Regulator

General Description

The LM2990 is a three-terminal, low dropout, 1 ampere

negative voltage regulator available with fixed output volt-

ages of −5, −5.2, −12, and −15V.

The LM2990 uses new circuit design techniques to provide

low dropout and low quiescent current. The dropout voltage

at 1A load current is typically 0.6V and a guaranteed worst-

case maximum of 1V over the entire operating temperature

range. The quiescent current is typically 1 mA with 1A load

current and an input-output voltage differential greater than

3V. A unique circuit design of the internal bias supply limits

the quiescent current to only 9 mA (typical) when the regu-

lator is in the dropout mode (V

voltage accuracy is guaranteed to

perature extremes.

The LM2990 is short-circuit proof, and thermal shutdown

includes hysteresis to enhance the reliability of the device

when overloaded for an extended period of time. The

Typical Application

*Required if the regulator is located further than 6 inches from the power supply filter capacitors. A 1 µF solid tantalum or a 10 µF aluminum electrolytic

capacitor is recommended.

**Required for stability. Must be at least a 10 µF aluminum electrolytic or a 1 µF solid tantalum to maintain stability. May be increased without bound to

maintain regulation during transients. Locate the capacitor as close as possible to the regulator. The equivalent series resistance (ESR) is critical, and

should be less than 10Ω over the same operating temperature range as the regulator.

Ordering Information and Connection Diagrams

Temperature

−40˚C to

−55˚C to

+125˚C

Range

LM2990WG5.0-QML

5962-9571101QEA

5962-9571101QXA

LM2990J-5.0-QML

LM2990T-5.0

LM2990S-5.0

-5.0

OUT

5% over load, and tem-

− V

DS010801

LM2990T-5.2

≤ 3V). Output

-5.2

Output Voltage

5962-9571001QEA

LM2990J-12-QML

LM2990 is available in a 3-lead TO-220 package and is rated

for operation over the automotive temperature range of

−40˚C to +125˚C.

Features

n 5% output accuracy over entire operating range

n Output current in excess of 1A

n Dropout voltage typically 0.6V at 1A load

n Low quiescent current

n Internal short circuit current limit

n Internal thermal shutdown with hysteresis

n Functional complement to the LM2940 series

Applications

n Post switcher regulator

n Local, on-card, regulation

n Battery operated equipment

LM2990S-12

LM2990T-12

-12

01080101

5962-9570901QEA

LM2990J-15-QML

LM2990S-15

LM2990T-15

-15

www.national.com

June 2005

Package

WG16A

TO-220

TO-263

J16A

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