FN8941 Rev.0.00

Page 3 of 15

Mar 22, 2018

ISL78219

1. Overview

1.3

Pin Configuration

ISL78219

(10 Ld TDFN)

Top View

1.4

Pin Descriptions

Pin Number

Pin Name

Description

1

COMP

Compensation pin. Output of the internal error amplifier. Capacitor and resistor from COMP pin to

ground.

2

FB

3

EN

Enable control pin. Pull the pin high to turn the device ON.

4, 5

GND

Power ground.

6, 7

LX

Power switch pin. Connected to the drain of the internal power MOSFET.

8

VIN

Analog power supply input pin.

9

FREQ

Frequency select pin. When the FREQ pin is set low, the switching frequency is set to 640kHz.

When set high, the switching frequency is set to 1.22MHz.

10

SS

Soft-start control pin. Connect a capacitor to control the converter output slew rate.

2

3

4

1

9

8

7

10

COMP

FB

EN

GND

SS

FREQ

VIN

LX

5

6

LX

GND