MP8864

High-Efficiency, 4 A, 21 V, Synchronous

MP8864 Rev. 1.02

www.MonolithicPower.com

1

1/18/2018

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

© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MP8864 is a high-frequency, synchronous,

rectified,

step-down,

switch-mode

converter

compact solution to achieve a 4 A continuous

output current with excellent load and line

regulation over a wide input supply range. The

MP8864 has synchronous-mode operation for

higher efficiency over the output load range.

The

reference

voltage

level

is

controlled,

on-the-fly

through

a

3.4

Mbps

serial

interface. The voltage range can be adjusted

from 0.6 V to 1.87 V in 10 mV 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 MP8864 requires a minimal number of

readily available, standard external components

and

is

available

in

a

15-pin

QFN15

(3mm x 3mm) package.

FEATURES

 Wide 4.5 V to 21 V Operation Input Range

 50 mΩ/23 mΩ Low R

MOSFETs

 1% VOUT Accuracy

Range from 0.6 V to 1.87 V in 10 mV Steps

with Slew-Rate Control

600 kHz Switching Frequency

 Programmable Output Voltage

 Power Good Indication

 OCP in Hiccup Mode

 External Soft-Start

 Available in a QFN 3mm x 3mm Package

APPLICATIONS

 SoC and Media Processors

 General Consumer

 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

MP8864

VIN

PG

ADD

SS

SDA

SCL

BST

SW

VOUT

VCC

PGND

AGND

FB

EN/SYNC

C1

0.22 μF

R4

100 kΩ

R2

34 kΩ

R3

33 kΩ

C5

47 uF

C2

22 uF x 2

R1

34 kΩ

L1

1 uH

C7

22 nF

VIN

4.5 V-21 V

PG

SDA

SCL

VOUT

1.2 V/4 A

EN

R9

100 kΩ

R8

10 Ω

C4

0.1 uF