MP8715 – 4A, 21V, 500kHz, STEP DOWN CONVERTER WITH 100% DUTY CYCLE OPERATION

MP8715 Rev. 1.01

www.MonolithicPower.com

9

6/13/2013

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BLOCK DIAGRAM

HS

Driver

VCC

GND

FB

SS

EN/SYNC

IN

BST

SW

Error Amplifier

PWM Comparator

Current Limit

Comparator

Current Sense

Amplifer

LS ILIM

Comparator

LS

Driver

BOOST

Regulator

VCC

VCC

Charge

Pump

Regulator

Oscillator

Reference

-

+

-

+

+

-

LOGIC

+

1MEG

POK

POK Comparator

Figure 1—Functional Block Diagram