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Axelite Confidential Materials, do not copy or distribute without written consent.

Rev.1.3 Oct.31, 2019

AX3531



BLOCK DIAGRAM

FB

EN

VIN

SW

GND

Over-Temperature and

Short-Circuit Protection

REF

Soft-Star

0.6V

+

-

-

+

Icomp

Isense

AMP

OSC

SLOPE

COMP

PWM

LOGIC

NON-OVERLAP

CONTROL

RESET

SET

Enable Logic



PIN ASSIGNMENT

The package of AX3531 is TSOT-23-6L; the pin assignment is given by:

(Top View)

EN

GND

SW

VIN

FB

1

2

3

4

5

TSOT-23-6L

6

GND

Name

Description

EN

Enable pin

H：normal operation

L：Shut own

VIN

Power Supply Input Pin

SW

Switch output pin. Connect

external inductor here. Minimize

trace area at this pin to reduce

EMI.

GND

Ground Pin

FB

Output Feedback pin



ORDER/MARKING INFORMATION

Order Information

Top Marking (TSOT-23-6L)

Package Type

AX3531

Packing

Blank : Bag

XX X

CT: TSOT-23-6L

A : Taping

GG

WW: 01~26(A~Z)

27~52(a~z)

ID code: internal

AX3531

Y W X

Year: 8=2018

9=2019

B=2020

C=2021

D=2022

:

Z=2044