MP8861 – 2.85V - 18V, 6A, SYNCHRONOUS, STEP-DOWN CONVERTER

MP8861 Rev. 1.1

www.MonolithicPower.com

35

5/28/2020

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TYPICAL APPLICATION CIRCUITS (continued)

MP8861

VIN

9

5

PG

A0

SS

SDA

SCL

BST

SW

VOUT

VCC

PGND

AGND

FB

EN

C5

0.47μF

RPG

100kΩ

C1

22µF

R2

13.7kΩ

R4

10kΩ

C2

22µF

C2A

22µF

C1A

22µF

C1B

0.1µF

R3

10Ω

C3

0.1µF

C2B

22µF

R1

80.6kΩ

L1

3.3µH

C4

22pF

C6

22nF

VIN

12V

PG

SDA

SCL

VOUT

5V/6A

13

7

4

3

6

14

8

12

11

10

2

1

C2C

22µF

EN

R5

499kΩ

RA0_up

RA0_down

NS

(I2C slave address setup

by A0 resistor divider)

VCC

Figure 21: VIN = 12V, VOUT = 5V, IOUT = 12A

NOTE:

10) All circuits are based on a 0.72V default reference voltage.