MPM3686

18V 20A Step-Down Power Module

in 12x15x4mm QFN

MPM3686 Rev. 1.02

www.MonolithicPower.com

1

10/13/2016

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© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MPM3686 is an easy-to-use fully integrated

20A step-down DC/DC power module. It

integrates the DC/DC converter, power inductor,

input/output capacitors and the necessary

resistors/capacitors

in

a

compact

QFN

12mmX15mmX4mm package. This total power

solution needs as few as two external

components (one resistor and one capacitor) to

work. MPM3686 can deliver 20A output current

over a wide input supply voltage range with

excellent load and line regulation.

The MPM3686 uses Constant-On-Time (COT)

control to provide fast transient response and

ease the loop stabilization.

The default under voltage lockout threshold is

internally set around 4.1V, but a resistor

network on the enable pin can increase this

threshold. The MPM3686 has an internal LDO

to power the control circuits and the integrated

power devices. This LDO can be disabled by an

external 5V to boost the efficiency.

The MPM3686 has an internal about 3ms soft

start (SS) timer. It can be increased with an

extra SS capacitor. An open drain power good

signal indicates that the output voltage is within

nominal voltage range.

The MPM3686 has fully integrated protection

features that include over-current protection,

over-voltage protection and thermal shutdown.

FEATURES

 Complete 20A DC-to-DC Solution

 Wide Input Voltage Range from 2.5V:

-- 2.5V to 18V with External 5V Bias

-- 4.5V to 18V with Internal Bias

 1% Reference Voltage Over 0˚C to 70˚C

Junction Temperature Range

 Adaptive

COT

Control

for

Ultrafast

Transient Response

 Programmable Switching Frequency from

200KHz to 1MHz

 Support Pre-Bias Start Up

 Programmable Soft-Start Time with Default

3ms

 Non-latch

OCP,

OVP

and

Thermal

Shutdown

 Output Adjustable from 0.65V to 5V

 QFN-65 (12mmx15mmx4mm) Package

APPLICATIONS

 Telecom and Networking Systems

 Base Stations

 Servers

 Personal Video Recorders

 Flat Panel Television and Monitors

 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.