MP8794

16V, 20A, Synchronous, Step-Down

Converter with Adjustable Current Limit,

Configurable Frequency, and Voltage Tracking

MP8794 Rev. 1.0

www.MonolithicPower.com

1

12/2/2019

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

© 2019 MPS. All Rights Reserved.

DESCRIPTION

The

MP8794

is

a

fully

integrated,

high-

frequency, synchronous, buck converter. The

MP8794

offers

a

compact

solution

that

achieves up to 20A of output current with

excellent load and line regulation over a wide

input supply range. The MP8794 operates at

high efficiency over a wide output current load

range.

The device adopts an internally compensated

constant-on-time

(COT)

control

mode

that

provides fast transient response and eases loop

stabilization.

The operating frequency can be set to 600kHz,

800kHz, or 1000kHz with MODE configuration,

allowing the MP8794 frequency to remain

constant regardless of the input and output

voltages.

The output voltage start-up ramp is controlled

by an internal 1ms timer that can be increased

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

drain power good (PGOOD) signal indicates

whether the output is within its nominal voltage

range. PGOOD is clamped at about 0.7V with

an external pull-up voltage when the input

supply fails to power the MP8794.

Full protection features include over-current

protection

(OCP),

over-voltage

protection

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

over-temperature protection (OTP).

The MP8794 requires a minimal number of

readily available, standard external components.

It

is available in a QFN-21 (3mmx4mm)

package.

FEATURES

 Wide Input Voltage Range

o

2.7V to 16V with External 3.3V VCC

Bias

o

4V to 16V with Internal Bias or External

3.3V VCC Bias

 Differential Output Voltage Remote Sense

 Configurable Accurate Current Limit Level

 20A Output Current

 Low R

DS(ON) Integrated Power MOSFETs

 Adaptive COT for Ultra-Fast Transient

Response

 Stable with Zero-ESR Output Capacitor

 Output Voltage Discharge

 Excellent Load Regulation

 Output Voltage Tracking

 PGOOD Active Clamped at Low Level

during Power Failure

 Programmable Soft-Start Time from 1ms

 Pre-Bias Start-Up

 Selectable Switching Frequency from

600kHz, 800kHz, and 1000kHz

 Non-Latch OCP, OVP, UVP, UVLO, and

Thermal Shutdown

 Adjustable Output from 0.6V to 90% of V

IN,

up to 5.5V Max

 Available in a QFN-21 (3mmx4mm)

Package

 The MPL-AY1265 Inductor Series Matches

Best Performance

APPLICATIONS

 FPGAs

 Flat-Panel Televisions and Monitors

 Multi-Functional Printers

 Access Points and Routers

 Optical Modules

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”, the MPS logo, and “Simple, Easy Solutions” are

trademarks of Monolithic Power Systems, Inc. or its subsidiaries.