ML3406 datasheet(2/12 Pages) ETC1

2 / 12 page

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Rev. E, Sep 2005

ML3406

Pin Configuration

Marking Rule

Description

Symbol

1 Product Name: DC-DC Step Down

2 Product Series: 01:ML3406

Vout=FB

Vout=1.5V

3 Item

Vout=1.8V

Pin Functions

Run (Pin1):

Run control Input. Forcing this pin above 1.5V enables the

part. Forcing this pin below 0.3V shuts down the device. In

shutdown, all functions are disabled drawing <1µA supply

current. Do not leave RUN floating.

GND (Pin 2):

Ground Pin.

SW (Pin 3):

Switch Node Connection to Inductor. This pin connects to

the drains of the internal main and synchronous power

MOSFET switches.

Vin (Pin 4):

Main Supply Pin. Must be closely decoupled to GND, Pin 2,

with a 2.2µF or greater ceramic capacitor.

VFB (Pin 5) (ML3406-FB):

Feedback Pin. Receives the feedback voltage from an

external resistive divider across the output.

Vout (Pin5) (ML3406-1.5V, 1.8V)

Output voltage Feedback Pin. An internal resistive divider

divides the output voltage down for comparison to the

internal reference voltage

ML3406 Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers