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.