© Semiconductor Components Industries, LLC, 2010

January, 2010 − Rev. 3

1

Publication Order Number:

CAT3606/D

CAT3606

6-Channel Low Noise

Charge Pump White LED

Driver

Description

The CAT3606 controls up to four LEDs for the main display and

two LEDs for the sub-display in cellular phones. The device is capable

of operating in either 1x (LDO) mode or 1.5x charge pump mode. All

LED pin currents are regulated and tightly matched to achieve

uniformity of brightness across the LCD backlight. An external

The device can deliver as much as 20 mA per channel during low

voltage operation (3 V), and 30 mA per channel during nominal

operation (3.3 V). A constant high-frequency switching scheme

(1 MHz) provides low noise and allows the use of very small value

ceramic capacitors.

A “zero” quiescent current mode can be achieved via the chip enable

pin EN. The Main and Sub LEDs each have their own dedicated

ON/OFF control pins ENM, ENS. Dimming can be achieved using

PWM signal on the ENM and ENS pins.

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

G366

MARKING DIAGRAMS

Device

Package

Shipping

ORDERING INFORMATION

CAT3606HV4−T2

TQFN−16

(Note 2)

2,000/

Tape & Reel

G366 = CAT3606HV4−T2

CDBB = CAT3606HV4−GT2

1. The “exposed pad” under the package must be

connected to the ground plane on the PCB.

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

3. NiPdAu Plated Finish (RoHS−compliant).

LED1

C2+

C2−

C1−

LED6

EN

ENM

ENS

1

(4 x 4 mm) (Top View)

CDBB

CAT3606HV4−GT2

TQFN−16

(Note 3)

GND