1002AS datasheet(3/8 Pages) MPS

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MP2109 – DUAL 1.2MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER

MP2109 Rev.1.3

www.MonolithicPower.com

2/21/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

TYPICAL PERFORMANCE CHARACTERISTICS

VIN1/IN2 = 3.3V, VOUT1 = 1.8V, VOUT2 = 1.2V, L1/2 = 4.7µH, CIN1/IN2 = 4.7µF, COUT1/OUT2 = 10µF, TA = +25°C,

unless otherwise noted.

MP2109-TPC07

Short Circuit Protection

(No Load)

MP2109-TPC08

Short Circuit Recovery

(No Load)

MP2109-TPC06

Startup from Shutdown

VOUT

1V/div

0.5A/div

VOUT

1V/div

0.5A/div

VEN

2V/div

VOUT

1V/div

0.5A/div

400ns/div

MP2109-TPC03

Load Transient

(IOUT=0mA to 500mA Step)

Medium Load Operation

(IOUT=400mA)

MP2109-TPC04

VOUT AC

100mV/div.

ILOAD

0.5A/div.

VSW

2V/div.

VOUT AC

20mV/div.

200mA/div.

VSW

2V/div.

VOUT AC

20mV/div.

500mA/div.

400ns/div

MP2109-TPC05

Heavy Load Operation

(IOUT=800mA)

0.606

0.604

0.602

0.600

0.598

0.596

0.594

-40

+20

-20

+40 +60 +80 +100

TEMPERATURE (

°C)

MP2109-TPC02

Feedback Voltage vs

Temperature

100

0.0

0.4

0.2

0.6

0.8

LOAD CURRENT (A)

MP2109-TPC01

Efficiency vs

Load Current

VOUT1=1.8V

VOUT2=1.2V

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