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

Rev.1.5 Oct.15, 2019

AX3113A



APPLICATION CIRCUIT

C2

470uF

C4

470uF

1

2

L1

33uH

R1

6.8K

R2

1.3K

VIN+12V

ON/OFF

VOUT = 5V/2A

R4

100K

D1

B340

C8

0.1uF

FB

EN

NC

VCC

SW

SW

VSS

VSS

AX3113A

C3

0.1uF

C6

0.1uF

R1

R2

VFB = 0.8V ; R2 suggest 0.8K ~ 6k

VOUT = VFB x (1 +

)

L1 recommend value (VIN=12V ,IOUT=2A)

VOUT

1.8 V

2.5V

3.3V

5V

L1 Value

18uH

22uH

27uH

33uH



FUNCTION DESCRIPTIONS

PWM Control

The AX3113A consists of DC/DC converters that employ a pulse-width modulation

(PWM) system. In converters of the AX3113A, the pulse width varies in a range from 0 to

100%, according to the load current. The ripple voltage produced by the switching can

easily be removed through a filter because the switching frequency remains constant.

Therefore, these converters provide a low-ripple power over broad ranges of input voltage

and load current.