LP2951-50

1

2

3

4

8

7

6

5

V

OUT

SENSE

SHUTDOWN

GND

FEEDBACK

V

TAP

1 PF

V

330 k

ERROR

V

IN

1 PF

V

LP2950, LP2951

SLVS582I – APRIL 2006 – REVISED NOVEMBER 2014

www.ti.com

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The LP295x devices are used as low-dropout regulators with a wide range of input voltages.

8.2 Typical Application

Figure 33. 12-V to 5-V Converter

8.2.1 Design Requirements

A 1-

μF (tantalum, ceramic, or aluminum) electrolytic capacitor should be placed locally at the input of the LP2950

or LP2951 device if there is, or will be, significant impedance between the ac filter capacitor and the input; for

example, if a battery is used as the input or if the ac filter capacitor is located more than 10 in away. There are

no ESR requirements for this capacitor, and the capacitance can be increased without limit.

As with most PNP LDOs, stability conditions require the output capacitor to have a minimum capacitance and an

ESR that falls within a certain range.

16

Submit Documentation Feedback

Copyright © 2006–2014, Texas Instruments Incorporated

Product Folder Links: LP2950 LP2951