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Rev.1.1 Nov.01, 2019

AX3703A



PIN ASSIGNMENT

The package of AX3703A ; the pin assignment is given by:

1

4

5

3

2

FB

VIN

EN

GND

SW

1

4

6

3

2

FB

VIN

EN

GND

SW

5

PG

1

3

2

VIN

EN

FB

6

7

8

SW

PG

GND

4

5

AGND

NC

EXPOSED PAD ON BACKSIDE

EP

Top View

Pin Description

SOT235

Pin No.

OT236

Pin No.

DFN2x2_8L

Pin No.

Symbol

Description

1

1

7

EN

Regulator Enable Control Input with accurate 1.21V enable threshold which

can be used to build precision R-C turn-on delay and input under-voltage

lockout.

Don’t float this pin. This pin has a pull-down resistor of typically 1MΩ to

GND.

 Drive EN above 1.21V to turn on the converter

 Drive EN below 1.11V to turn off the converter and discharge output

2

2

4, EP

GND

Ground

3

3

6

SW

Power Switch Node

4

4

3

VIN

Input Supply Voltage

-

5

2

PG

Power Good Open-

drain Output. Connect a 100kΩ pull-up resistor to V

IN or

VOUT.

5

6

1

FB

Voltage Feedback Input. Connect a resistor divider between output and FB

to program the output voltage. VFB is regulated to 0.6V.

-

8

AGND

Analog Ground