LM79L12ACZ National Semiconductor, LM79L12ACZ Datasheet

LM79L12ACZ

Manufacturer Part Number

LM79L12ACZ

Description

IC,VOLT REGULATOR,FIXED,-12V,BIPOLAR,SIP,3PIN,PLASTIC

Manufacturer

National Semiconductor

Datasheets

1.LM79L12ACZ.pdf (8 pages)

2.LM79L12ACZ.pdf (8 pages)

3.LM79L12ACZ.pdf (8 pages)

Specifications of LM79L12ACZ

Rohs Compliant

45AB

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LM320L/LM79LXXAC/LM13121 Series

3-Terminal Negative Regulators

General Description

The LM320L/LM79LXXAC/LM13121 dual marked series of

3-terminal negative voltage regulators features fixed output

voltages of −5V, −12V, and −15V with output current capa-

bilities in excess of 100mA. These devices were designed

using the latest computer techniques for optimizing the pack-

aged IC thermal/electrical performance. The LM79LXXAC

series, even when combined with a minimum output com-

pensation capacitor of 0.1µF, exhibits an excellent transient

response, a maximum line regulation of 0.07% V

maximum load regulation of 0.01% V

The LM320L/LM79LXXAC/LM13121 series also includes, as

self-protection circuitry: safe operating area circuitry for out-

put transistor power dissipation limiting, a temperature inde-

pendent short circuit current limit for peak output current

limiting, and a thermal shutdown circuit to prevent excessive

junction temperature. Although designed primarily as fixed

voltage regulators, these devices may be combined with

simple external circuitry for boosted and/or adjustable volt-

ages and currents. The LM79LXXAC series is available in

Typical Applications

*Required if the regulator is located far from the power supply filter. A 1µF

aluminum electrolytic may be substituted.

Connection Diagrams

Required for stability. A 1µF aluminum electrolytic may be substituted.

Fixed Output Regulator

6-Bump micro SMD

Bump Side Down

00774820

/mA.

DS007748

/V, and a

00774801

the 3-lead TO-92 package, 8-lead SOIC package, and the

6-Bump micro SMD package. The LM320L series is avail-

able in the 3-lead TO-92 package.

For output voltage other than −5V, −12V and −15V, the

LM137L series provides an output voltage range from 1.2V

to 47V.

Features

n Preset output voltage error is less than

n Specified at an output current of 100mA

n Easily compensated with a small 0.1µF output

n Internal short-circuit, thermal and safe operating area

n Easily adjustable to higher output voltages

n Maximum line regulation less than 0.07% V

n Maximum load regulation less than 0.01% V

n See AN-1112 for micro SMD considerations

−V

5V/R1

line and temperature

protection

capacitor

= −5V − (5V/R1 + I

3 I

Adjustable Output Regulator

TO-92 Plastic Package (Z)

) • R2,

Bottom View

00774802

5% overload,

January 2003

www.national.com

OUT

/mA

00774803

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