ML4818

PRODUCT SPECIFICATION

2

REV. 1.0.3 6/21/01

Pin Configuration

Pin Description

Pin

Name

Function

1

GND

Ground

Timing capacitor for oscillator

3

RAMP

Non-inverting input to main comparator. Connected to current sense resistor for

current mode

Current limit sense pin. Normally connected to current sense resistor

5

E/A OUT

Output of error amplifier and input to PWM comparator

6,7

GND

Ground and substrate

8

INV

Inverting input to error amp

9

SOFT START

Normally connected to soft start capacitor

10

SHUTDOWN

Pulling this pin low puts the IC into a power down mode and turns off all outputs.

11

Resistor which sets discharge current for oscillator timing capacitor

12

Timing elements for Integrating fault detection and reset delay circuits

13

CLOCK

Oscillator output

14

Resistor to ground on this pin programs the amount of delay from the time an

output turns off until its complementary output turns on

15

GND

Ground

16

A2 OUT

High current totem pole output A1

17

A1 OUT

High current totem pole output A2

18,19

GND

Ground and substrate

20

Positive supply for the IC

21

B2 OUT

High current totem pole output B1

22

B1 OUT

High current totem pole output B2

23

GND

Ground

24

Buffered output for the 5V voltage reference

GND

B1 OUT

B2 OUT

GND

GND

A1 OUT

A2 OUT

GND

CLOCK

GND

RAMP

E/A OUT

GND

GND

INV

SOFT START

SHUTDOWN

24

23

22

21

20

19

18

17

16

15

14

13

1

2

3

4

5

6

7

8

9

10

11

12

TOP VIEW

24-Pin Power DIP (P24)