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Rev.1.5 Nov.06, 2019

AX5510A



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 AX5510A 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

AX

FB

GND

(GND)

Exposed

Pad

SOP/MSOP-8L-EP

COMP

EN

SS

FREQ

VCC

LX

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