MP2235 datasheet(16/21 Pages) MPS

Part #	MP2235

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

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Manufacturer	MPS [Monolithic Power Systems]

Direct Link	http://www.monolithicpower.com

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16 / 21 page

MP2235

– SYNCHRONOUS STEP-DOWN CONVERTER

MP2235 Rev. 1.0

www.MonolithicPower.com

16

5/16/2013

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

External Bootstrap Diode

An external bootstrap diode can enhance the

efficiency of the regulator given the following

conditions:

 VOUT is 5V or 3.3V; and

 Duty cycle is high: D=

IN

OUT

V

>65%

In these cases, add an external BST diode from

the VCC pin to BST pin, as shown in Figure 8.

Figure 8: Optional External Bootstrap Diode to

Enhance Efficiency

The recommended external BST diode is

IN4148, and the BST capacitor value is 0.1µF

to 1

μF.

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