MP1469 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

MP1469 Rev. 1.01

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8

8/26/2013

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PIN FUNCTIONS

Package

Pin #

Name

Description

1

IN

Supply Voltage. The MP1469 operates from a 4.7V-to-16V input rail. Requires C1 to

decouple the input rail. Connect using a wide PCB trace.

2

GND

System Ground. Reference ground of the regulated output voltage: requires extra care

during PCB layout. Connect to GND with copper traces and vias.

3

SW

Switch Output. Connect using wide PCB trace.

4

BST

Bootstrap. Connect a capacitor and a resistor between SW and BS pins to form a floating

supply across the high-side switch driver. Recommend to use 1uF BST capacitor.

5

EN

resistor.

6

FB

Feedback. Set the output voltage with from the tap of an external resistor divider running

from the output to GND. The frequency fold-back comparator lowers the oscillator

frequency when the FB voltage is below 200mV to prevent current-limit runaway during a

short circuit fault.