MIC2103 datasheet(25/42 Pages) MICROCHIP

Part #	MIC2103

Description	75V Synchronous Buck Controllers Featuring Adaptive ON-Time Control

PDF	42 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

Logo

25 / 42 page

 2017 Microchip Technology Inc.

DS20005899A-page 25

MIC2103/4

the gate voltage with minimal droop for the power

stroke (high-side switching) cycle, i.e., ∆BST = 10 mA

x 3.33 μs/0.1 μF = 333 mV. When the low-side

MOSFET is turned back on, CBST is recharged through

D1. A small resistor RG, which is in series with CBST,

can be used to slow down the turn-on time of the

high-side N-channel MOSFET.

The drive voltage is derived from the VDD supply

voltage. The nominal low-side gate drive voltage is VDD

and the nominal high-side gate drive voltage is

approximately VDD – VDIODE, where VDIODE is the

voltage drop across D1. An approximate 30 ns delay

between the high-side and low-side driver transitions is

used to prevent current from simultaneously flowing

unimpeded through both MOSFETs.

MIC2103 Datasheet(PDF) 25 Page - Microchip Technology