2/20

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

Rev.1.5 Nov.06, 2019

AX5510



BLOCK DIAGRAM

VCC

SS

LX

SGND

Control and

Driver Logic

EN

COMP

1.238V

Reference

Soft

Start

Current

Sense

Slope

Compensation

Oscillator

FB

Error Amplifier

Summing

Comparator

Thermal

Shutdown

7uA

Enable/

Disable

PGND

N-MOS

FREQ



PIN ASSIGNMENT

The packages of AX5510 are MSOP-10L-EP, TDFN-10L, SOP-8L-EP and MSOP-8L-EP; the

pin assignment is given by:

( Top view )

MSOP-10L-EP

LX

SGND

VCC

COMP

PGND

SS

FREQ

EN

1

2

3

4

5

6

7

8

9

10

FB

LX

Exposed

Pad

(SGND)

( Top View)

1

2

3

4

8

7

6

5

EN

GND

SOP/MSOP-8L-EP

AX5913

COMP

FB

SS

FREQ

LX

VCC

Exposed

Pad

(GND)

TDFN-10L (3*3)

COMP

LX

1

PGND

10

2

3

4

5

6

7

8

9

FB

EN

SGND

LX

VCC

FREQ

SS

Exposed

Pad

(SGND)

TOP View

Name

Description

VCC Power Input pin

EN Enable Pin

COMP Compensation Pin

FB Feedback Pin

SS

Soft start Pin. Connect a capacitor to

GND

GND Ground Pin

SGND Signal Ground

PGND Power Ground

LX Switch Output Pin

FREQ

Frequency select pin. The power

switch operates at 680kHz if FREQ

is connected to GND and at

1.2MHz if FREQ is connected to

VCC