AX3701



BLOCK DIAGRAM

Bandgap

0.6V

FB

PWM

HSON

LSON

SW

GND

M1

REFSS

Modulation

Ramp

Control

Logic

REFSS

Constant

On-time

ON

VIN

SW

IN

SW

M2

OVLD

ILIMT

Current

Limit

&

Over-load

Detection

EA

EN

IN

SoftStart



PIN ASSIGNMENT

The packages of AX3701 are SOT-23-5L and TDFN-6L, the pin assignment is given by:

(Top View)

EN

GND

SW

VIN

FB

1

2

3

4

SOT-23-5L

5

SOT-23-5L (A-Type)

TDFN-6L (2*2)

VIN

FB

SW

1

2

3

4

5

6

EN

GND

NC

GND

Name

Description

EN

Enable pin

H：normal operation

L：Shutdown

GND

Ground Pin

SW

Switch output pin. Connect external inductor here. Minimize trace area at this

pin to reduce EMI.

VIN

Power Supply Input Pin

FB

Output Feedback pin

2/17

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

Rev1.6 Sep.30, 2021