MP8794集成電路（IC）的穩(wěn)壓器-DC-DC開關穩(wěn)壓器規(guī)格書PDF中文資料

DESCRIPTION

The MP8794 is a fully integrated, highfrequency,

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 opendrain

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 RDS(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 VIN,

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