cat3636 Catalyst Semiconductor, cat3636 Datasheet

cat3636

Manufacturer Part Number

cat3636

Description

6-channel Quad-modetm Fractional Led Driver In Tqfn3x3

Manufacturer

Catalyst Semiconductor

Datasheet

1.CAT3636.pdf (16 pages)

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6-Channel Quad-Mode

PIN CONFIGURATION

Characteristics subject to change without notice

FEATURES

APPLICATIONS

ORDERING INFORMATION

Notes: (1) Matte-Tin Plated Finish (RoHS-compliant)

CAT3636HV3-GT2

CAT3636HV3-T2

High efficiency 1.33x charge pump

Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x

Drives up to 6 LEDs at 32mA each

1-wire EZDim

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 3mm x 3mm, 16-lead TQFN package

LCD Display Backlight

Color RGB LEDs

Cellular Phones

Digital Still Cameras

Handheld Devices

Part Number

(2) NiPdAu Plated Finish (RoHS-compliant).

LED current programming

TQFN-16

Package

(1)

(2)

Quantity

per Reel

2000

Fractional LED Driver in TQFN3x3

Package

Marking

JAAA

JAAR

TYPICAL APPLICATION CIRCUIT

DESCRIPTION

The CAT3636 is a high efficiency quad-mode fractional

charge

programmable by a one wire digital interface.

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 2.5V to 5.5V.

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

0.25mA and 32mA.

The device is available in a tiny 16-lead TQFN 3mm x

3mm package with a max height of 0.8mm.

Catalyst Semiconductor’s Quad-Mode

pump switching architecture is patented.

For Ordering Information details, see page 15.

pump

that

can

drive

Doc. No. MD-5020 Rev. D

CAT3636

1.33x charge

six

LEDs

The

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