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

Rev.1.3 Nov.26, 2019

AX3518



BLOCK DIAGRAM

FB

EN

SGND

SVIN

PVIN

SW

PGND

Over-Temperature

and Short - Circuit

Protection

REF

Soft-Star

+

-

-

+

Icomp

Isense

AMP

OSC

SLOPE

COMP

PWM

LOGIC

Izero

COMP

NON -OVERLAP

CONTROL

RESET

SET

Enable Logic

REF

SVIN

I



PIN ASSIGNMENT

The packages of AX3518 are SOP-8L-EP and TDFN-8L; the pin assignment is given by:

(Top View )

1

2

3

4

8

7

6

5

EN

SVIN

SOP-8L-EP

REF

PVIN

PGND

SW

FB

SGND

Exposed

Pad

(SGND)

AX3518

Name

Description

SVIN Signal Supply Input Pin

REF

Reference output pin

SGND Signal Ground Pin

FB

Output Feedback pin

EN

Enable pin, Internal pull-high

function.

H：normal operation

L：Shutdown

PGND Power Ground Pin

SW

Switch

output

pin.

Connect

external inductor here. Minimize

trace area at this pin to reduce

EMI.

PVIN Power Supply Input Pin

TDFN-8L (3*3)

1

2

3

4

5

6

7

8

(GND)

AX3518J8

SVIN

SGND

FB

REF

PVIN

SW

PGND

EN