FEATURES

•

High accuracy output voltage

•

Guaranteed 100mA output

•

Very low quiescent current

•

Low dropout voltage

•

Extremely tight load and line regulation

•

Very low temperature coefficient

•

Needs only 1

µF for stability

•

Error Flag warns of output dropout

•

Logic-Controlled electronic shutdown

•

Output programmable from 1.24 to 29V

APPLICATIONS

• Battery powered systems

• Cordless telephones

• Radio control systems

• Portable/Palm top/Notebook computers

• Portable consumer equipment

• Portable Instrumentation

• Avionics

• Automotive Electronics

• SMPS Post-Regulator

• Voltage Reference

PRODUCT DESCRIPTION

The LP2950-XX/LP2951-XX is a low power voltage regulator. This device excellent choice for use in battery powered application such as c

ordless telephone, radio control systems, and portable computers.

The LP2950-XX/LP2951-XX features very low quiescent current (75

µA Typ.) and very low drop output voltage (Typ.

40mV at light load and 380mV at 100mA). This includes a tight initial tolerance of 0.5% typ., extremely good load

and line regulation of 0.05% typ., and very low output temperature coefficient, making the LP2950-XX/LP2951-XX

useful as a low-power voltage reference.

The error flag output feature is used as power-on reset for warn of a low output voltage, due to following batteries on input. Other feature i

s the logic-compatible shutdown input which enable the regulator to be switched on and off.

The LP2951-XX is available in 8-pin plastic packages. The regulator output voltage may be pin-strapped for a -XX volt or programmed from

1.24 volt to 29 volts with external pair of resistors.

The LP2950-XX is offered in 3-pin TO-92 package compatible with other fixed regulator.

Absolute Maximum Ratings

Power Dissipation

Internally Limited

Lead Temperature

(Soldering, 5 seconds)

260

°C

Storage Temperature Range

-65

°C to+150°C

Operating Junction Temperature Range

-55

°C to +150°C

Input Supply Voltage

-0.3 to +30V

Feedback Input Voltage

-1.5 to +30V

Shutdown Input Voltage

-0.3 to +30V

Error Comparator Output

-0.3 to +30V

Pin Connection

LP2951-XX

Top View

TO-92 Plastic Package

(LP2950-XX only)

Bottom View

Device Selection Guide

Vout

, V

olts

Device

2.85*

LP2950-2.85, LP2951-2.85

3.0

LP2950-3.0, LP2951-3.0

3.3

LP2950-3.3, LP2951-3.3

5.0

LP2950-5.0, LP2951-5.0

* - other versions are also available

Vout = 2.0V to 5.0V. Please consult factory for

more information

Figure 1. Adjustable Regulator

LP2950/LP2951 100mA Low Drop Out Voltage Regulators