MP8865

High-Efficiency, 6A, 21V, Synchronous

MP8865 Rev. 1.03

www.MonolithicPower.com

1

1/18/2018

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MP8865 is a high-frequency, synchronous,

rectified,

step-down,

switch-mode

converter

compact solution to achieve a 6A continuous

output current with excellent load and line

regulation over a wide input supply range. The

MP8865 has synchronous-mode operation for

higher efficiency over the output load range.

The reference voltage level can be controlled

on-the-fly

through

the

3.4Mbps

serial

interface. The voltage range can be adjusted

from 0.6V to 1.87V in 10mV steps. Also, the

voltage slew rate, switching frequency, enable,

and power-saving mode are selectable through

Current-mode operation provides fast transient

response and eases loop stabilization. Full

protection

features

include

over-current

protection

(OCP),

over-voltage

protection

(OVP), and thermal shutdown (TSD).

The MP8865 requires a minimal number of

readily

available,

standard,

external

components and is available in a QFN-15

3mm x 3mm package.

FEATURES

 Wide 4.5V to 21V Operation Input Range

 45mΩ/18mΩ Low R

MOSFETs

 1% VOUT Accuracy

Range from 0.6V to 1.87V in 10mV Steps

with Slew Rate Control

600kHz Switching Frequency.

 Programmable Output Voltage

 Power Good Indication

 OCP Protection in Hiccup Mode

 External Soft Start

 Available in a QFN-15 3mm x 3mm

Package

APPLICATIONS

 SoC and Media Processors

 General Consumers

 Distributed Power Systems

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For

MPS green status, please visit the MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP8865

VIN

PG

ADD

SS

SDA

SCL

BST

SW

VOUT

VCC

PGND

AGND

FB

EN/SYNC

C1

0.22

μF

R4

100k

Ω

R2

34k

Ω

R3

33k

Ω

C5

47

μF

C2

22

μFX2

R1

34k

Ω

L1

1

μH

C7

22nF

4.5V-21V

SDA

SCL

VOUT

1.2V/6A

R9

100k

Ω

R8

10

Ω

C4

0.1

μF