2

Rev.1.2

10 -

■Block diagram

Reference

Generator

Gate

DRV

Control

logic

+

-

PWM

Comp.

Soft start

Current

Amp.

+

-

-

+

-

Error

Amp.

RAMP

OTP

-

+

-

+

LX

VCC

5

6

2

VSEN

1

GND

Vss

0.4V

1.18V

8

COMP

1.18V

7

OVP

4

3

ISEN-

ISEN+

■Pin configuration

Pin No.

Pin name

Pin description

1

GND

GND

2

VSEN

The voltage sense input

3

ISEN-

The current sense negative input

4

ISEN+ The current sense positive input

5

LX

Regulator output

6

VCC

The input supply voltage

7

OVP

The over-voltage sense input

8

COMP The E/A output pin for frequency compensation

SOP-8(TOP VIEW)

4

3

2

1

5

6

7

8