D52LC datasheet(4/8 Pages) MPS

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MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER

MP2105 Rev. 1.3

www.MonolithicPower.com

5/11/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

TYPCIAL PERFORMANCE CHARACTERISTICS (continued)

VIN = 3.3V, VOUT = 1.8V, L1 = 4.7µH, C1 = 4.7µF, C3 = 10µF, TA = +25°C, unless otherwise noted.

MP2105-TPC09

Short Circuit Protection

(No Load)

MP2105-TPC07

Heavy Load Operation

IOUT = 800mA

MP2105-TPC10

Short Circuit Recovery

(No Load)

MP2105-TPC08

Startup from Shutdown

VOUT

10mV/div.

0.2A/div.

IL=0

2V/div.

VOUT

1V/div.

0.5A/div.

VOUT

1V/div.

0.5A/div.

VEN

2V/div.

VOUT

1V/div.

0.5A/div.

PIN FUNCTIONS

Pin # Name Description

Regulator Enable Control Input. Drive EN above 1.5V to turn on the MP2105. Drive EN below

0.3V to turn it off (shutdown current < 0.1µA).

GND

Ground

Power Switch Output. Inductor connection to drains of the internal PFET and NFET switches.

Supply Input. Bypass to GND with a 2.2µF or greater ceramic capacitor.

Feedback Input. Connect FB to the center point of the external resistor divider. The feedback

threshold voltage is 0.6V.

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