MP2307 데이터 시트보기 (PDF) - Monolithic Power Systems

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MP2307

3A, 23V, 340KHz Synchronous Rectified Step-Down Converter

Monolithic Power Systems 

MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER

5) Connect IN, SW, and especially GND

respectively to a large copper area to cool

the chip to improve thermal performance

and long-term reliability.

TOP Layer

External Bootstrap Diode

An external bootstrap diode may enhance the

efficiency of the regulator, the applicable

conditions of external BS diode are:

z VOUT is 5V or 3.3V; and

z Duty cycle is high: D= VOUT >65%

VIN

In these cases, an external BS diode is

recommended from the output of the voltage

regulator to BS pin, as shown in Figure3

BS

MP2307

External BST Diode

IN4148

CBST

SW

5V or 3.3V

L COUT

Figure 3—Add Optional External Bootstrap

Diode to Enhance Efficiency

The recommended external BS diode is IN4148,

and the BS cap is 0.1~1µF.

Bottom Layer

Figure 2―PCB Layout (Double Layer)

MP2307 Rev. 1.9

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10

5/28/2008

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