MCP16311SLASH2 datasheet(17/40 Pages) MICROCHIP

Part #	MCP16311/2

Description	30V Input, 1A Output, High-Efficiency, Integrated Synchronous Switch Step-Down Regulator

PDF	40 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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17 / 40 page

 2013-2019 Microchip Technology Inc.

DS20005255C-page 17

MCP16311/2

4.2.5

HIGH-SIDE DRIVE

The MCP16311/2 features an integrated high-side

N-Channel MOSFET for high-efficiency step-down

power conversion. An N-Channel MOSFET is used for

its low resistance and size (instead of a P-Channel

MOSFET). The N-Channel MOSFET gate must be

driven above its source to fully turn on the device,

resulting in a gate-drive voltage above the input to turn

on the high-side N-Channel. The high-side N-channel

source is connected to the inductor and boost cap or

switch node. When the high-side switch is off and the

low-side switch is on, the inductor current flows through

the low-side switch, providing a path to recharge the

boost cap from the boost voltage source. The voltage

for the boost cap is supplied from the internal regulator

(VCC). An internal boost blocking diode is used to

prevent current flow from the boost cap back into the

regulator during the internal switch-on time.

MCP16311/2 Datasheet(PDF) 17 Page - Microchip Technology