MP2233 datasheet(12/18 Pages) MPS

部品番号	MP2233

部品情報	High-Efficiency, 3A, 16V, 1.4MHz Synchronous, Step-Down Converter

PDF	18 Pages

Scroll/Zoom	100%

メーカー	MPS [Monolithic Power Systems]

ホームページ	http://www.monolithicpower.com

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12 / 18 page

MP2233 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

MP2233 Rev. 1.01

www.MonolithicPower.com

12/6/2012

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

Startup and Shutdown

If both VIN and EN exceed their respective

thresholds, the chip starts. The reference block

starts first, generating stable reference voltage

and currents, and then the internal regulator is

enabled. The regulator provides stable supply

for the remaining circuitries. The frequency

needs to fold-back linearly with FB so that VOUT

starts up smoothly.

Three events can shut down the chip: EN low,

VIN low, and thermal shutdown. For the

shutdown procedure, the signaling path is first

blocked to avoid any fault triggering. The

COMP voltage and the internal supply rail are

then pulled down. The floating driver is not

subject to this shutdown command.

MP2233 データシート(PDF) 12 Page - Monolithic Power Systems