MP20249

Dual, Ultra-Low Noise, High PSRR

200mA Linear Regulator

MP20249 Rev1.0

www.MonolithicPower.com

1

12/15/2010

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© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP20249 is a dual-channel, ultra-low noise,

low dropout and high PSRR linear regulator.

Fixed output voltage options are available

between 1.2V to 3.3V with 1% accuracy by

operating from a +2.3V to +6.0V input. It is

designed to deliver up to 200mA of load current

at each channel. Dropout voltage is only 75mV at

full

load.

The

MP20249

uses

internal

PMOSFETS as pass elements, which consume

125µA supply current (both LDOs on) at no load

condition. With new innovative design techniques,

the MP20249 can achieve an output voltage

noise as low as 16µVRMS without using a

bypass capacitor at each channel. The MP20249

is designed and optimized to work with small-

value, low-cost ceramic capacitors, making it

ideal for applications with space-constraints. It

typically requires only 1µF of output capacitance

for stability with any load at each channel.

The EN1 and EN2 pins control each output

respectively. When both channels shutdown

simultaneously, the chip is turned off and

consumes nearly zero operation current, which is

suitable for battery-power devices. The MP20249

features current limit and over-temperature

protection.

The MP20249 also has an output discharge

function that controls the quick discharging of the

output capacitor.

It is available in a miniature 6-ball WLCSP

package.

FEATURES

• Input Voltage Range: 2.3V to 6.0V

• Two LDOs in a 1.0x1.5mm WLCSP Package

• Up to 200mA Output Current (Per Channel)

• Dual Enable Pins Control Each Output

• 16µVRMS

Output

Noise

(100Hz-1kHz)

Bandwidth

with

No

Bypass

Capacitor

required

• High PSRR: 65dB @ 1kHz

• Low dropout: 60mV @ 150mA Load

• Stable with 1µF Ceramic Capacitor for Any

Load (Per Channel)

• Very Fast Line and Load Transient Response

• Output Discharge Function

• Current Limit and Thermal Protection

APPLICATIONS

• Cellular Mobile Phones

• Digital Cameras

• Handheld and Battery-powered Equipment

• Wireless LAN

• Post DC-to-DC Regulation

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

Monolithic Power Systems, Inc.

ADAM (Analog Digital Adaptive Modulation), AAM (….) areTrademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP20249

EN1

EN2

GND

VIN

VOUT1

VOUT2

1uF

1uF

1uF

A1

A2

B1

B2

C1

C2

VIN=2.3V to 6V

VOUT1=1.2V to 3.3V

VOUT2=1.2V to 3.3V