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Rev.1.9 Aug.05, 2010

AX3101



BLOCK DIAGRAM

Vcc

Oscillation

Circuit

Reference Voltage

Source with Soft Start

+

-

Vss

VEN

EN

OCSET

FB

SW

Thermal

Shutdown

110uA

-

PWM Switched

Control Circuit



PIN ASSIGNMENT

The package of AX3101 is SOP-8L; the pin assignment is given by:

Name

Description

FB

Feedback pin

EN

Power-off pin

H：normal operation(Step-down)

L：Step-down operation stopped

(All circuits deactivated)

OCSE

T

Add an external resistor to set max

switch output current.

VCC

IC power supply pin

VSS

GND pin

SW

Switch pin. Connect external

inductor and diode here.



ORDER/MARKING INFORMATION

Order Information

Top Marking

Package Type

S: SOP-8L

AX3101 X X X

Packing

Blank : Tube

A : Taping

Frequency

Blank : 330Khz

Logo

Y

AX3

Part number

ID code:internal

WW: 01~52

Year: 10=2010

11=2011

1 01

YWW X