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

Rev.1.5 Oct.16, 2019

AX3121



BLOCK DIAGRAM

PVcc

Oscillation

Circuit

0.62V

PGND

VEN

EN/SS

COMP

FB

SW

Thermal

Shutdown

-

PWM Switched

Control Circuit

PMOS

NMOS

CLM

6uA

3.5V

Soft-Start

SGND

SVcc



PIN ASSIGNMENT

The package of AX3121 is SOP-8L-EP; the pin assignment is given by:

( Top View )

1

2

3

4

8

7

6

5

FB

COMP

SOP-8L-EP

Exposed

Pad

(SW)

PVcc

EN/SS

SVcc

SGND

SW

PGND

Name

Description

FB

Feedback pin

EN/SS

ON/OFF Shutdown and Soft-start

pin

COMP Compensation pin

PVCC

Driver power supply pin

SVcc IC power supply pin

SW

Switch pin. Connect external

inductor here.

PGND Power ground pin

SGND Signal ground pin



ORDER/MARKING INFORMATION

Order Information

Top Marking (SOP-8L-EP)

Package Type

ES: SOP-8L-EP

AX3121 XX X

Packing

Blank : Tube

A : Taping

Logo

Y

AX 3

Part number

ID code:internal

WW : 01~52

1 2 1

Y WW X

Year : 18=2018

19=2019

20=2020

21=2021

22=2022

:

45=2045