EV2109DQ-00A 데이터 시트보기 (PDF) - Monolithic Power Systems

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EV2109DQ-00A

Dual 1.2MHz, 800mA Synchronous Step-Down Converter

Monolithic Power Systems 

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

PIN FUNCTIONS

Pin # Name Description

1

EN1

Channel 1 Enable Control Input. Drive EN1 above 1.5V to turn on the Channel 1. Drive EN1

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

2

FB1

Channel 1 Feedback Input. Connect FB1 to the center point of the external resistor divider. The

feedback voltage is 0.6V.

3

IN2 Channel 2 Supply Input. Bypass to GND with a 2.2µF or greater ceramic capacitor.

4 GND2 Ground 2.

5

SW2

Channel 2 Power Switch Output. Inductor connection to drains of the internal PFET and NFET

switches.

6

EN2

Channel 2 Enable Control Input. Drive EN2 above 1.5V to turn on the Channel 2. Drive EN2

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

7

FB2

Channel 2 Feedback Input. Connect FB2 to the center point of the external resistor divider. The

feedback voltage is 0.6V.

8

IN1 Channel 1 Supply Input. Bypass to GND with a 2.2µF or greater ceramic capacitor.

9 GND1 Ground 1.

10

SW1

Channel 1 Power Switch Output. Inductor connection to drains of the internal PFET and NFET

switches.

MP2109 Rev.1.4

www.MonolithicPower.com

4

10/16/2006

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© 2006 MPS. All Rights Reserved.

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