MP24893 – STEP DOWN WLED DRIVER WITH WIDE 6V-TO-36V INPUT VOLTAGE
MP24893 Rev.1.02 www.MonolithicPower.com 4
12/7/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
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
(V
EN/DIM
=1.28V).
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.
