MP8902

– LOW DROPOUT, 250mA LINEAR REGULATOR

MP8902 Rev. 1.0

www.MonolithicPower.com

5

9/4/2017

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© 2017 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

Description

1, 2

OUT

Regulator Output. OUT is the output of the linear regulator. Bypass OUT to GND with a 1

μF

or greater capacitor.

3

FB

Feedback Input. Connect a resistive voltage divider from OUT to FB to set the output

voltage. OUT feedback threshold is 1.222V.

4

GND,

Exposed

Pad

The exposed pad and GND pin must be connected to the same ground plane.

5

EN

Enable Input. Drive EN high to turn on the MP8902, drive EN low to turn it off. For automatic

startup, connect EN to IN.

6

NC

No Connect.

7, 8

IN

Power Source Input. IN supplies the internal power to the MP8902 and is the source of the

pass transistor. Bypass IN to GND with a 1

μF or greater capacitor.

OPERATION

The

MP8902

is

a

low-current,

low-noise,

high-PSRR, low-dropout, linear regulator. It is

intended for use in devices that require very low

noise power supplies and high-PSRR such as

PLL VCO supplies for mobile handsets and

802.11 PC Cards, as well as audio codecs and

microphones. The MP8902 uses a PMOS pass

element and features internal thermal shutdown.

As shown in Figures 1 and 2, optional feed-

FB and OUT pins for an improved transient

response.

Figure 1

—Ultra-Low-Noise Fixed Output Regulator

Figure 2

—Ultra-Low-Noise Adjustable Regulator: V