1FEATURES

2• Preset Output Voltage Error is Less than ±5%

Over Load, Line and Temperature

• Specified at an Output Current of 100mA

• Easily Compensated with a Small 0.1μF Output

Capacitor

• Internal Short-Circuit, Thermal and Safe

Operating Area Protection

• Easily Adjustable to Higher Output Voltages

• Maximum Line Regulation Less than 0.07%

VOUT/V

• Maximum Load Regulation Less than 0.01%

VOUT/mA

• See AN-1112 (SNVA009) for DSBGA

Considerations

DESCRIPTION

The LM79LXXAC series of 3-terminal negative

voltage regulators features fixed output voltages of

−5V, −12V, and −15V with output current capabilities

in excess of 100mA. These devices were designed

using the latest computer techniques for optimizing

the packaged IC thermal/electrical performance. The

LM79LXXAC series, when combined with a minimum

output capacitor of 0.1μF, exhibits an excellent transient response, a maximum line regulation of

0.07% VO/V, and a maximum load regulation of

0.01% VO/mA.

The LM79LXXAC series also includes, as self-

protection circuitry: safe operating area circuitry for

output transistor power dissipation limiting, a

temperature independent 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

voltages and currents. The LM79LXXAC series is

available in the 3-lead TO package, the 8-lead SOIC

package, and the 6-Bump DSBGA package.

For output voltages other than the pre-set -5V, -12V

and -15V, the LM137L series provides an adjustable

output voltage range from -1.2V to -47V.