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

Rev.1.5 Nov.06, 2019

AX5201



APPLICATION CIRCUIT

VCC=5V

R4

11K

C2

0.47uF

C1

470uF

D1

B340A

C4

470uF

L1

22uH

Vout=12V

U1

AX5201

6

2

4

1

3

8

7

5

SW

Vcc

SS

EN

FB

SGND

PGND

SW

C7

0.1uF

C3

Option

R3

1K

R1

100K

0.47uF

C8

C5

4.7uF

VOUT = VFB

(1 +

R3

R4

), VFB = 1.0V, R3 = 1K ~ 3KΩ



FUNCTION DESCRIPTIONS

PWM Control

The AX5201 consists of DC/DC converters that employ a pulse-width modulation

(PWM) system. In converters of the AX5201, the pulse width varies in a range from 0 to

85%, 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.

Setting the Output Voltage

Application circuit item shows the basic application circuit with AX5201 adjustable

output version. The external resistor sets the output voltage according to the following

equation:











 





3

4

1

1.0

R

R

V

V

OUT