MP8903

Low Dropout

150mA Linear Regulator

MP8903 Rev. 1.11

www.MonolithicPower.com

1

4/4/2011

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© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP8903 is a 150mA low-dropout linear

regulator that can operate from 2.7V to 6.5V

input. It regulates the output with 2% accuracy

and comes with preset 2.5V, 2.85V or 3.3V

output. An external resistor divider may be used

to adjust the output voltage from 1.25V to 5V.

The MP8903 has thermal protection to guard

against harsh operating conditions, and is

available in small QFN8 (2x2mm) and 5-pin

TSOT23 packages.

FEATURES

• 2.7V to 6.5V Input Voltage Range

• Fixed Output Voltage Options of 2.5V,

2.85V or 3.3V

• Adjustable Output Voltage from 1.25V to 5V

using an External Resistor Divider

• Low 100mV Dropout at 100mA Output

• 2% Accurate Output Voltage

• Stable With Low-ESR Output Capacitors

• Thermal Protection

• Available in Tiny QFN8 (2x2mm) and

TSOT23-5 Packages

APPLICATIONS

• 802.11 PC Cards

• Mobile Handset PLL Power

• Audio Codec Power

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“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP8903DX-X.X

FB

OUT

GND

EN

IN

OUTPUT

1.25V to 5V

2.7V to 6.5V

EN (Pin3)

may be connected

to IN (Pin 1) directly

The sum of

R1 and R2

should not

exceed 100k

R1

R2

160

140

120

100

80

60

40

20

0

0

20 40 60 80 100 120 140 160