
CAT3636
6-Channel Quad-Mode [
Fractional LED Driver in
TQFN 3x3
Description
The CAT3636 is a high efficiency Quad ? Mode fractional charge
pump that can drive up to six LEDs programmable by a one wire
digital interface. The inclusion of a 1.33x fractional charge pump
mode increases device efficiency by up to 10% over traditional 1.5x
charge pumps with no added external capacitors.
Low noise input ripple is achieved by operating at a constant
switching frequency which allows the use of small external ceramic
capacitors. The multi ? fractional charge pump supports a wide range of
input voltages from 2.5 V to 5.5 V.
The EN/SET logic input functions as a chip enable and a “1 ? wire”
addressable interface for control and current setting of all LEDs. Three
groups of two LEDs can be configured with independent LED currents
http://onsemi.com
TQFN ? 16
HV3 SUFFIX
CASE 510AD
PIN CONNECTIONS
between 0.25 mA and 32 mA.
The device is available in a tiny 16 ? lead TQFN 3 mm x 3 mm
package with a max height of 0.8 mm.
ON Semiconductor ’s Quad ? Mode ? 1.33x charge pump switching
architecture is patented.
LEDC2
LEDC1
LEDB2
LEDB1
1
C2 ?
C2+
C1 ?
C1+
2,000/
Features
? High Efficiency 1.33x Charge Pump
? Quad ? Mode Charge Pump: 1x, 1.33x, 1.5x, 2x
? Drives up to 6 LEDs at 32 mA Each
? 1 ? Wire EZDim t LED Current Programming
? Power Efficiency up to 92%
? Low Noise Input Ripple in All Modes
? “Zero” Current Shutdown Mode
? Soft Start and Current Limiting
? Short Circuit Protection
? Thermal Shutdown Protection
? Tiny 3 mm x 3 mm, 16 ? lead TQFN Package
? These Devices are Pb ? Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
? LCD Display Backlight
? Color RGB LEDs
? Cellular Phones
? Digital Still Cameras
? Handheld Devices
(Top View)
MARKING DIAGRAMS
JAAA JAAR
AXXX AXXX
YWW YWW
JAAA = CAT3636HV3 ? T2
JAAR = CAT3636HV3 ? GT2
A = Assembly Location
XXX = Last Three Digits of Assembly Lot Number
Y = Production Year (Last Digit)
WW = Production Week (Two Digits)
ORDERING INFORMATION
Device Package Shipping
CAT3636HV3 ? T2 TQFN ? 16
(Note 1) (Pb ? Free)
CAT3636HV3 ? GT2
(Note 2)
TQFN ? 16
(Pb ? Free)
Tape & Reel
1. Matte ? Tin Plated Finish (RoHS ? compliant).
2. NiPdAu Plated Finish (RoHS ? compliant).
? Semiconductor Components Industries, LLC, 2010
May, 2010 ? Rev. 7
1
Publication Order Number:
CAT3636/D