AP3019A

Document number: DS41298 Rev. 3 - 2

2 of 12

www.diodes.com

August 2018

© Diodes Incorporated

AP3019A

Typical Applications Circuit

22

H

1

F

0.22

F

10



V

IN

SW

V

OUT

FB

GND

CTRL

AP3019A

Control

Signal

V

IN

3V

L

C

IN

C

OUT

1

6

4

5

2

3

C: X5R or X7R dielectric

L: SUMIDA CDRH5D28R-220NC or equivalent

This circuit can work in full temperature

Pin Descriptions

Pin Number

Pin Name

Function

1

SW

Switch pin. Connect external inductor

2

GND

Ground

3

FB

Voltage feedback pin. Reference voltage is 200mV

4

CTRL

Shutdown and dimming pin. Connect to 1.8V or higher to enable device; Connect to 0.5V or less to

disable device; Connect to a PWM signal to achieve LEDs brightness dimming

5

Output pin. Connect to the cathode of internal Schottky diode

6

Input supply pin. Must be connected to a local bypass capacitor