© Semiconductor Components Industries, LLC, 2010

February, 2010 − Rev. 1

1

Publication Order Number:

CAT3604/D

CAT3604

4-Channel Regulated

Charge Pump White LED

Driver

Description

The CAT3604 is a charge pump operating in either 1x (LDO) mode

or 1.5x fractional mode regulating current through each of the 4 LED

pins. Operation at a fixed high frequency of 1 MHz typical allows the

use of very small value ceramic capacitors.

The CAT3604 drives white light-emitting diodes (LEDs) connected

in parallel and provides tightly matched regulated current to achieve

uniformity of brightness in LCD backlighting applications. An

of up to 30 mA are supported over a range of input supply voltages

from 3 V to 5.5 V, making the device ideal for battery-powered

applications.

LED dimming can be accomplished by several methods including

using a DC voltage to set the RSET pin current, applying a PWM

signal on the Control signals, or adding a switched resistor in parallel

with RSET. The Enable input pin allows the device to be placed in

power-down mode with “zero” quiescent current.

The CAT3604 features short circuit and overcurrent limiting

protection. The device is available in a 16−pad TQFN package with a

max height of 0.8 mm.

Features

Compliant

Applications

http://onsemi.com

TQFN−16

HV4 SUFFIX

CASE 510AE

G364

MARKING DIAGRAMS

Device

Package

Shipping

ORDERING INFORMATION

CAT3604HV4−T2

TQFN−16

(Note 2)

2,000/

Tape & Reel

G364 = CAT3604HV4−T2

CDBA = CAT3604HV4−GT2

1. The package exposed pad is electrically connec-

ted inside the package to GND and to pin 12.

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

3. NiPdAu Plated Finish (RoHS−compliant).

GND

C2+

C2−

C1−

EN

CTR0

CTR1

CTR2

1

(4 x 4 mm) (Top View)

CDBA

CAT3604HV4−GT2

TQFN−16

(Note 3)

GND