August 2004

1

M9999-080204

MIC2211

Micrel

MIC2211

Dual

µµµµµCap LDO in 3mm ××××× 3mm MLF™

General Description

The MIC2211 is a dual

µCap, low dropout regulator. The first

regulator is capable of sourcing 150mA, while the second

regulator can source up to 300mA.

Ideal for battery operated applications, the MIC2211 offers

1% accuracy, extremely low dropout voltage (80mV @

100mA), and extremely low ground current, only 48

µA total.

Equipped with TTL logic compatible enable pins, the MIC2211

can be put into a zero-off-mode current state, drawing no

current when disabled. Separate enable pins allow individual

control of each output voltage.

The MIC2211 is a

µCap design, operating with very small

ceramic output capacitors for stability, reducing required

board space and component cost.

The MIC2211 is available in fixed output voltages in the

10-pin 3mm

× 3mm MLF™ leadless package.

Typical Application

VIN

EN1

OFF ON

OFF ON

EN2

CBYP

Baseband

µProcessor

VOUT1

VOUT2

0.01

µF

1

µF

Ceramic

1

µF

GND

MIC2211-xxBML

MIC2211 Typical Cell Phone Application

Features

• Input voltage range: 2.25V to 5.5V

• Stable with ceramic output capacitor

• 2 LDO outputs

• Output 1 - 150mA output current

• Output 2 - 300mA output current

• Low dropout voltage of 80mV @ 100mA

• Ultra-low quiescent current of 48

µµµµµA total (24µµµµµA/LDO)

• High output accuracy:

• +1.0% initial accuracy

• +2.0% over temperature

• Thermal shutdown protection

• Current limit protection

• Tiny 10-pin 3mm

××××× 3mm MLF™ package

Applications

• Cellular phones

• Wireless modems

• PDAs

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com