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Rev.2.8 Oct.18, 2019

AX3503



BLOCK DIAGRAM



PIN ASSIGNMENT

The packages of AX3503 are SOT-23-5L and TDFN-6L (2*2); the pin assignment is given by:

(Top View)

EN

GND

SW

VIN

FB

1

2

3

4

5

SOT-23-5L

TDFN-6L (2*2) A Type

VIN

FB

SW

1

2

3

4

5

6

EN

GND

NC

GND

Name

Description

EN

Enable pin

H：normal operation

L：Shutdown

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

TDFN-6L (2*2) B Type

FB

VIN EN

1

2

3

4

5

6

NC

GND

SW

GND