MP24893 – STEP DOWN WLED DRIVER WITH WIDE 6V-TO-36V INPUT VOLTAGE

MP24893 Rev.1.02

www.MonolithicPower.com

4

12/7/2012

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PIN FUNCTIONS

TSOT23-5

Pin#

QFN6

(3x3mm)

Pin#

Name

Description

1

1

SW

Drain of Internal MOSFET. Connect the inductor common terminal and

Schottky anode to this pin.

2

2

GND

Ground.

3

5

EN/DIM

Enable/Dimming Command Input. For PWM dimming, apply a square wave

signal to this pin. For analog dimming, apply a 0.3V-to-2.5V DC voltage to

linearly control the LED current range from 25% to 200%. Turn off the output

current when pulling this pin below 0.2V. Leave it open for normal operation

4

4

RS

LED Current Sense Input. Connect a current-sense resistor to program the

LED average current to IN pin.

5

3

IN

Input Supply Pin. Connect an appropriate decoupling capacitor from the IN

pin to GND.

6

N/C

Not Connected.