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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

LP2954, LP2954A

SNVS096E – JUNE 1999 – REVISED JULY 2016

LP2954, LP2954A 5-V and Adjustable Micropower LDOs

1

1 Features

1

•

5-V Output within 1.2% Over Temperature

(A Grade)

•

Adjustable 1.23-V to 29-V Output Voltage

Available (LP2954IM and LP2954AIM)

•

Ensured 250-mA Output Current

•

Extremely Low Quiescent Current

•

Low Dropout Voltage

•

Reverse Battery Protection

•

Extremely Tight Line and Load Regulation

•

Very Low Temperature Coefficient

•

Current and Thermal Limiting

•

Pin Compatible with LM2940 and LM340

(5-V Version Only)

•

Adjustable Version Adds ERROR Flag to Warn of

Output Drop and a Logic-Controlled Shutdown

2 Applications

•

High-Efficiency Linear Regulator

•

Low Dropout Battery-Powered Regulator

3 Description

The LP2954 is a 5-V micropower LDO with very low

quiescent current (90 μA typical at 1-mA load) and

very low dropout voltage (typically 60 mV at light

loads and 470 mV at 250-mA load current).

The quiescent current increases only slightly at

dropout (120 μA typical), which prolongs battery life.

The LP2954 with a fixed 5-V output is available in

three-pin TO-220 and DDPAK/TO-263 packages. The

adjustable LP2954 is provided in an 8-pin, small-

outline SOIC package. The adjustable version also

provides a resistor network which can be pin

strapped to set the output to any voltage from to

1.23 V to 29 V.

Reverse battery protection is provided for the IN pin.

The tight line and load regulation (0.04% typical), as

well as very low output temperature coefficient make

the LP2954 well suited for use as a low-power

voltage reference.

Output accuracy is ensured at both room temperature

and over the entire operating temperature range.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

LP2954

SOIC (8)

4.90 mm × 3.91 mm

DDPAK/TO-263 (3)

10.18 mm × 8.41 mm

TO-220 (3)

14.986 mm × 10.16 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic