MP1567 – 1.2A SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER

MP1567 Rev. 2.3

www.MonolithicPower.com

9

1/3/2006

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© 2006 MPS. All Rights Reserved.

TM

External Boost Diode

For 5V input or output applications, it is

recommended that an external boost diode be

added. This will help improve the regulator

efficiency. The diode can be a low cost diode

such as an IN4148 or BAT54.

MP1567

SW

BS

1

3

5V

BOOST

DIODE

10nF

MP1567_F02

Figure 2—External Boost Diode

This diode is also recommended for high duty

cycle operation (when

IN

OUT

V

V

>65%) and high

TYPICAL APPLICATION CIRCUITS

MP1567

SW

IN

BS

FB

BP

SS

COMP

SGND PGND

EN

1

3

7

9

8

4

5

6

10

2

1.8V/1.2A

INPUT

6V

OPEN IF

NOT USED

MP1567_F03

OFF ON

C6

10nF

C4

OPEN

C7

10nF

C3

1nF

C5

10nF

Figure 3—6V Input Application Circuit