MP2240 datasheet(10/16 Pages) MPS

No de pièce	MP2240

Description	High-Efficiency, 3A, 16V, 800kHz Synchronous, Step-Down Converter

PDF	16 Pages

Scroll/Zoom	100%

Fabricant	MPS [Monolithic Power Systems]

Site Internet	http://www.monolithicpower.com

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10 / 16 page

MP2240 – SYNCHRONOUS STEP-DOWN CONVERTER

MP2240 Rev. 1.1

www.MonolithicPower.com

8/20/2013

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

exceeds 5V, U1 will regulate M1 to maintain a

5V BST voltage across C4. A 20Ω resistor

placed between SW and BST cap. is strongly

recommended to reduce SW spike voltage.

VIN

BST

VOUT

Figure 2: Internal Bootstrap Charging Circuit

Startup and Shutdown

If VIN exceeds its 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 a stable supply for the remaining

circuitries.

Three events can shut down the chip: VIN low,

and thermal shutdown. During 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.

MP2240 Fiches technique(PDF) 10 Page - Monolithic Power Systems