© Semiconductor Components Industries, LLC, 2010

May, 2010 − Rev. 7

1

Publication Order Number:

CAT3636/D

CAT3636

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

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.

architecture is patented.

Features

Compliant

Applications

http://onsemi.com

TQFN−16

HV3 SUFFIX

CASE 510AD

PIN CONNECTIONS

C2−

C2+

C1−

C1+

LEDC2

LEDC1

LEDB2

LEDB1

1

(Top View)

JAAA

AXXX

YWW

MARKING DIAGRAMS

Device

Package

Shipping

ORDERING INFORMATION

CAT3636HV3−T2

(Note 1)

TQFN−16

(Pb−Free)

2,000/

Tape & Reel

1. Matte−Tin Plated Finish (RoHS−compliant).

2. NiPdAu Plated Finish (RoHS−compliant).

JAAR

AXXX

YWW

CAT3636HV3−GT2

(Note 2)

TQFN−16

(Pb−Free)

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)