MP2918

4V to 40V Input, Current Mode,

Synchronous, Step-Down Controller

MP2918 Rev. 1.02

www.MonolithicPower.com

1

5/31/2017

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

© 2017 MPS. All Rights Reserved.

DESCRIPTION

The MP2918 is a high-voltage, synchronous,

step-down, switching controller that can directly

step down voltages from up to 40V. The

MP2918 uses PWM current control architecture

with accurate cycle-by-cycle current limit and is

capable of driving dual N-channel MOSFET

switches.

Advanced Asynchronous Mode (AAM) enables

non-synchronous operation to optimize light-

load efficiency.

The operating frequency of the MP2918 can be

programmed

by

an

external

resistor

or

synchronized to an external clock for noise-

sensitive applications. Full protection features

include precision output over-voltage protection

(OVP), output over-current protection (OCP),

and thermal shutdown.

The MP2918 is available in TSSOP20-EP and

QFN-20 (3mmx4mm) packages.

APPLICATIONS

 Automotive

 Industrial Control Systems

FEATURES

 Wide 4V to 40V Operating Input Range

 Dual N-Channel MOSFET Driver

 0.8V

Voltage

Reference

with

±1.5%

Accuracy Over Temperature

 Low Dropout Operation: Maximum Duty

Cycle at 99.5%

 Programmable Frequency Range: 100kHz -

1000kHz

 External Sync Clock Range: 100kHz-

1000kHz

 180°Out-of-Phase SYNCO Pin

 Programmable Soft Start (SS)

 Power Good (PG) Output Voltage Monitor

 Selectable Cycle-by-Cycle Current Limit

 Output Over-Voltage Protection (OVP)

 Hiccup Over-Current Protection (OCP)

 Internal LDO with External Power Supply

Option

 Programmable Forced CCM and AAM

 Available

TSSOP20-EP

and

QFN-20

(3mmx4mm) Packages

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

MP2918

4-40V

IN

VCC1

EN/SYNC

PG

PGND

FB

BG

TG

BST

SS

COMP

VOUT

VIN

FREQ

SENSE+

SW

CCM/AAM

SENSE-

SGND

VCC2

SYNCO

ILIM

VCC1

VCC1