MP92265

– 18V, 5A, SYNCHRONOUS, STEP-DOWN CONVERTER

MP92265 Rev. 1.0

www.MonolithicPower.com

8

11/29/2016

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PIN FUNCTIONS

Pin #

Name

Description

1

AAM

Advanced asynchronous mode. Connect to the tap of two resistor dividers from VCC to

GND to force the MP92265 into non-synchronous mode under light loads. Drive AAM high

(i.e.: connect to VCC) to force the MP92265 into continuous conduction mode (CCM).

2

IN

Supply voltage. The MP92265 operates from a 6V to 18V input rail. A capacitor (C1) is

required to decouple the input rail. Connect IN using a wide PCB trace.

3

SW

Switch output. Connect SW using a wide PCB trace.

4

GND

Power ground. GND requires special consideration during PCB layout. Connect GND with

copper traces and vias.

5

BST

Bootstrap. A capacitor is required between SW and BST to form a floating supply across

the high-side switch driver.

6

SS

Soft start. Connect an external capacitor to SS to program the soft-start time for the switch-

mode regulator.

7

VCC

Bias supply. Decouple VCC with a 0.1

μF to 0.22μF capacitor.

8

FB

Feedback. Connect FB to the tap of an external resistor divider from the output to GND to

set the output voltage. The frequency foldback comparator lowers the oscillator frequency

when the FB voltage is below 480mV to prevent current limit runaway during a short-circuit

fault condition.