PACKAGE PIN DESCRIPTION

FUNCTION

FUNCTION

COMP

GND

Output

R/ C

T

T

This pin is Error Amplifier output and is made available for loop compensation.

This pin is the combined control circuitry and power ground.

This pin is the positive supply of the control integrated circuit (IC)

This is the inverting input of the Error Amplifier. It is normally connected to the

switching power supply output through a resistor divider.

This output directly drives the gate of a power MOSFET. Peak current up to 1.0A

are sourced and sunk by this pin.

A voltage proportional to inductor current connected to this input. The PWM

uses this information to terminate the output switch conduction.

Oscillator frequency and maximum Output cycle are programmed by connecting

resistor

to V

and capacitor C to ground.

REF

T

PIN lead

1

5

7

2

6

8

3

4

3

PARAMETER

SYMBOL

VALUE

UNIT

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (low impedance source)

Output Current, Source or Sink *

Input Voltage (analog inputs pins 2)

Maximum Power Dissipation (T = 25°C)

A

Error Amp Output Sink Current

Storage Temperature Range

Lead Temperature (soldering 5 sec.)

30

±1.0

- 0.3 to + 5.5

10

V

A

°C

°C

V

CC

I

O

V

I

P

D

I

SINK(E.A)

T

stg

T

L

1.0

- 65 to + 150

260

W

mA

V

* Note: Maximum Package Power Dissipation Limits must be observed.