MP9928

4V-60V Input, Current Mode,

Synchronous Step-Down Controller

MP9928 Rev. 1.0

www.MonolithicPower.com

1

5/20/2016

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

© 2016 MPS. All Rights Reserved.

DESCRIPTION

The MP9928 is a high-voltage, synchronous

step-down switching regulator controller that

can directly step down voltages from up to 60V.

The

MP9928

uses

PWM

current

control

architecture

with

accurate

cycle-by-cycle

current limiting. It is capable of driving dual N-

channel MOSFET switches.

AAM Mode (Advanced asynchronous mode)

enables non-synchronous operation and PFM

mode to optimize light load efficiency.

The operating frequency of MP9928 can be

programmed

by

an

external

resistor

or

synchronized to an external clock for noise-

sensitive applications. Fault protections are

available including a precision output over

voltage protection (OVP), output over current

protection (OCP), and thermal shutdown.

The MP9928 is available in TSSOP20-EP

package and QFN-20 (3mmx4mm) package.

FEATURES

• Wide 4V to 60V Operating Input Range

• Dual N-Channel MOSFET Driver

• Low Dropout Operation: Maximum Duty

Cycle at 99.5%

• Programmable Frequency Range: 100kHz -

1000kHz

• 180º Out-of-Phase SYNCO

• External Soft-Start and PG Pin

• Selectable Cycle-by-Cycle Current Limit

• Output Over Voltage Protection

• Internal LDO with Externally Power Supply

Option

• Programmable CCM and AAM Pulse-

Skipping Mode

• Accuracy Over Temperature Protection

• TSSOP20-EP package and QFN-20

(3mmx4mm) Package

APPLICATIONS

• PD Power Supply in PoE System

• USB Dedicated Charging Port (DCP)

• Industrial Control Systems

• Power Supply for Linear Chargers

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

MP9928

4-60V

IN

VCC1

EN/SYNC

PG

PGND

FB

BG

TG

BST

SS

COMP

VOUT

VIN

FREQ

SENSE+

SW

CCM/AAM

SENSE-

SGND

VCC2

SYNCO

ILIM