MPQ8623

16V, 6A, High Efficiency, Synchronous,

Step-Down Converter with

Adjustable Current Limit

MPQ8623 Rev. 1.01

www.MonolithicPower.com

1

10/2/2018

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

© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MPQ8623 is a fully integrated, high-

frequency, synchronous, buck converter. The

MPQ8623 offers a very compact solution that

achieves up to 6A of output current with excellent

load and line regulation over a wide input supply

range. The MPQ8623 operates at high efficiency

over a wide output current load range.

The

MPQ8623

adopts

an

internally

compensated constant-on-time (COT) control

that provides fast transient response and eases

loop stabilization.

The operating frequency can be set to 600kHz,

1100kHz,

or

2000kHz

easily

with

MODE

configuration, allowing the MPQ8623 frequency

to remain constant regardless of the input and

output voltages.

The output voltage start-up ramp is controlled by

an internal 1.5ms timer, which can be increased

by adding a capacitor on TRK/REF. An open-

drain power good (PGOOD) signal indicates if

the output is within its nominal voltage range.

PGOOD is clamped to around 0.7V with an

external pull-up voltage when the input supply

fails to power the MPQ8623.

Full protection features include over-current

protection

(OCP),

over-voltage

protection

(OVP), under-voltage protection (UVP), and

over-temperature protection (OTP).

The MPQ8623 requires a minimal number of

readily available, standard, external components

and is available in a QFN-14 (2mmx3mm)

package.

FEATURES

 Wide Input Voltage Range

o

2.85V to 16V with External 3.3V VCC

Bias

o

4V to 16V with Internal VCC Bias or

External 3.3V VCC Bias

 6A Output Current

 Programmable Accurate Current Limit Level

 Low R

 Proprietary Switching Loss Reduction

Technique

 Adaptive Constant-On-Time (COT) for

Ultrafast Transient Response

 Stable with Zero ESR Output Capacitor

 0.5% Reference Voltage Over 0°C to

+70°C Junction Temperature Range

 1% Reference Voltage Over -40°C to

+125°C Junction Temperature Range

 Selectable Forced CCM or Pulse-Skip

Operation

 Excellent Load Regulation

 Output Voltage Tracking

 Output Voltage Discharge

 PGOOD Active Clamped at Low Level

during Power Failure

 Programmable Soft-Start Time from 1.5ms

and Up

 Pre-Bias Start-Up

 Selectable Switching Frequency from

600kHz, 1100kHz, and 2000kHz

 Latch-Off for OCP, OVP, UVP, OTP, and

UVLO

 Output Adjustable from 0.9V to 0.9 x VIN Up

to 6V Max

Package

APPLICATIONS

 Telecom and Networking Systems

 Servers, Cloud-Computing, Storage

 Base Stations

 General Purpose Point-of-Load (PoL)

 12V Distribution Power Systems

 High-end TV

 Game Consoles and Graphic Cards

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.