MIC5265

150mA µCap LDO Regulator

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

April 2005

M9999-041505

(408) 955-1690

General Description

The MIC5265 is a 150mA LDO in lead-free Thin SOT-23-5

packaging ideal for applications where cost is the priority.

The MIC5265 is ideal for any application in portable

electronics, including both RF and Digital applications.

With low output noise and high PSRR, the MIC5265 is

ideal for noise sensitive applications such as RF. While

the fast transient response and active shutdown circuitry

makes it well-suited for powering digital circuitry.

The MIC5265 has a 2.7V to 5.5V input operating voltage

range, making it ideal for operation from a single cell

lithium ion battery or fixed 3.3V and 5V systems.

The

MIC5265 come with an enable pin and can be put into a

zero off-mode current state.

The MIC5265 offers low dropout voltage (210mV at

150mA), low output noise (57µVrms), high PSRR and

integrates an active shutdown circuit on the output of each

regulator to discharge the output voltage when disabled.

Data sheets and supporting documentation can be found

on Micrel’s web site at: www.micrel.com

Features

•

2.7V to 5.5V supply voltage.

•

Low 75µA quiescent current per LDO.

•

Thin SOT-23-5 package.

•

Low Noise – 57µVrms.

•

High PSRR – 60dB at 1kHz.

•

Low dropout voltage – 210mV at 150mA.

•

Stable with ceramic output capacitors.

•

Fast transient response.

•

Active shutdown.

Applications

•

Cellular Telephones

•

PDAs

•

GPS Receivers

____________________________________________________________________________________________________________

Typical Application

MIC5265-xxYD5

VIN

VOUT

BYP

GND

EN

Rx/Synth

RF Receiver

0.01µF

1µF

1µF

RF Power Supply

0

-10

-20

-40

-50

-60

-70

0.01 0.1

1

10

100

1000

FREQUENCY (kHz)

Power Supply

Rejection Ratio

-30

-80

BYP = 0.1µF