MIC5309-1.5YD6 View Datasheet(PDF) - Micrel

Part Name

Description

MFG CO.

MIC5309-1.5YD6

Low VIN/VOUT 300mA High PSRR ULDO™ with Ultra-Low IQ

Micrel 

MIC5309

Low VIN/VOUT 300mA High PSRR

ULDO™ with Ultra-Low IQ

General Description

The MIC5309 is a high performance, µCap low dropout

regulator, offering ultra-low operating current while

maintaining very fast transient response. The MIC5309

can source up to 300mA of output current and can

regulate down from a low input supply voltage to increase

system efficiency.

Ideal for battery operated applications; the MIC5309 offers

extremely low dropout voltage 100mV typically @ 300mA

load, and low ground current at all load conditions

(typically 23µA). The MIC5309 can also be put into a zero-

off-mode current state, drawing virtually no current when

disabled.

The MIC5309 is available in fixed output voltages in the

tiny 6-pin 1.6mm x 1.6mm thin MLF® leadless package as

well as the 6-pin TSOT-23 for cost sensitive applications.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• Input voltage range: 1.7V to 5.5V

• Guaranteed 300mA over temperature

• Ultra Low dropout voltage of 100mV typical 300mA

• High PSRR, up to 90dB @ 1kHz

• Output Voltage range: 0.8V to 2.0V

• Very low ground current – 23µA under full load

• Bias supply voltage range: 2.5V to 5.5V

• Stable with 1µF ceramic output capacitor

• 300mA maximum output current at 1.7V input voltage

• Very fast transient response – ideal for digital loads

• Thermal shutdown and current limit protection

• Tiny 6-pin 1.6mm x 1.6mm Thin MLF® package

• Cost effective 6-pin TSOT-23 package

Applications

• Mobile Phones

• PDAs

• GPS Receivers

• Portable Electronics

___________________________________________________________________________________________________________

Typical Application

Li-Ion

2.7V to 4.2V

MIC23050

DC-to-DC

Converter

CBIAS

CIN

1µF

1µF

MIC5309

BIAS

VIN VOUT

EN

GND

BYP

CBYP

10nF

COUT

1µF

ULDO is a trademark of Micrel, Inc.

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

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

May 2008

M9999-051508-D

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