Pin Assignments

Pin Definitions

Internal Block Diagram

Pin

Symbol

Function

Power Supply

2

EXT2

External gate drive pin (low when P-Ch FET is ON)

3

P-BST

P-Ch gate boost

4

S/D,

Output voltage sense pin for ILC6376/77SO-XX; 1V feedback pin for

ILC6376/77SO-ADJ

6

GND

Ground connection

7

EXT1

External gate drive pin (low when P-Ch FET is ON)

Inductor Switch Pin

ILC6376/77

(TOP VIEW)

3

4

5

1

2

6

7

8

FB

EXT1

S/D,

GND

P_BST

EXT2

ILC6376/77 SOXX

SO-8 Package

ILC6376/77

(TOP VIEW)

3

EXT1

4

5

S/D,

GND

1

2

6

7

8

P_BST

EXT2

ILC6376/77 SOADJ

SO-8 Package

PWM/PFM

Protection

L

X

GND

EXT1

RAMP WAVE

P_BST

GATE

DRIVER

GENERATOR,

OSCILLATOR

CONTROLLER

+

-

PWM

Comp

EXT2

+

-

Error

Amp

1

5

4

6

3

2

7

8

S/D,

Softstart,

Vref

S/D,

Vref

with

Soft-

start

ILC6376/77

2

©2001 Fairchild Semiconductor Corporation