April 2004

1

M9999-042704

MIC2215

Micrel

MIC2215

Triple High PSRR, Low Noise

General Description

The MIC2215 is a high performance, triple LDO voltage

regulator, with each regulator capable of providing 250mA

continuous output current.

Ideal for battery operated applications, the MIC2215 offers

1% initial accuracy, extremely low dropout voltage (100mV@

150mA), and low ground current at light load (typically 110

µA

per regulator). Equipped with a noise bypass pin and featur-

ing very high power supply ripple rejection (PSRR) of up to

80dB, the MIC2215 provides the lowest noise and highest

efficiency solution for RF applications in portable electronics

such as cellular phones and wireless LAN applications.

Equipped with TTL logic-compatible enable pins, each of the

regulators in the MIC2215 can be put into a zero current off

mode where the supply current is much less than 1

µA when

all the regulators are disabled. The MIC2215 is a

µCap

design, which enables a stable output with small ceramic

output capacitors, reducing both cost and required board

space for output bypassing.

The MIC2215 is available in the miniature 16-pin, 4mm

× 4mm

MLF™ package.

All support documentation can be found on Micrel’s web site

at www.micrel.com.

Typical Application

VIN1

VIN2

VIN3

VOUT3

EN1

EN2

EN3

Ceramic

Ceramic

CBYP

VOUT1

VOUT2

GND

MIC2215-xxxBML

OFF ON

OFF ON

OFF ON

Rx Chain

Tx Chain

Synth/TCXO/VCO

Features

• Input voltage range: +2.25V to +5.5V

• 70dB PSRR

• Stable with ceramic output capacitor

• High output accuracy:

–

±1.0% initial accuracy

–

±2.0% over temperature

• Low dropout voltage of 100mV@150mA

• Low quiescent current: 110

µA per regulator

• Fast turn-on time: 30

µs

• Zero off-mode current

• Thermal shutdown protection

• Current-limit protection

• Tiny 16-pin (4mm

× 4mm) MLF™ package

Applications

• Cellular phones

• PCs and peripherals

• Wireless LAN cards

• PDAs

• GPS

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