CAT3603 datasheet(1/12 Pages) CATALYST

部品番号	CAT3603

部品情報	3-Channel LED Driver in 3x3mm Package

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メーカー	CATALYST [Catalyst Semiconductor]

ホームページ	http://www.catalyst-semiconductor.com

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CAT3603

1

Doc. No. 5017 Rev. C

Characteristics subject to change without notice

3-Channel LED Driver in 3x3mm Package

FEATURES

Drives up to 3 LEDs

Current setting resistor

Compatible with supply voltage of 3V to 5.5V

Power efficiency up to 91%

Output Current up to 30mA per LED

Fractional pump 1x/1.5x

Low noise input ripple

Fixed High Frequency Operation 1MHz

“Zero” Current Shutdown Mode

Soft start and current limiting

Short circuit protection

12-lead TDFN 3mm x 3mm package

APPLICATION

LCD Display Backlight

Cellular Phones

Digital Still Cameras

Handheld Devices

ORDERING INFORMATION

Part

Number

Package

Quantity

per Reel

Package

Marking

CAT3603HV2 TDFN-12 3x3

Green*

2000

HABB

* Lead Finish Matte-Tin

For Ordering Information details, see page 11.

DESCRIPTION

The CAT3603 is a charge pump LED driver

operating in either 1x (LDO) mode or 1.5x fractional

mode regulating current through each of the 3 LED

pins. Operation at a constant switching frequency of

1MHz allows the use of very small value ceramic

capacitors.

The CAT3603 drives 3 white LEDs in parallel and

provides tightly matched regulated current to achieve

uniform brightness in LCD backlighting applications.

An external resistor, RSET, controls the output

current level. The device can deliver up to 30mA over

an input voltage supply range from 3V to 5.5V,

making it ideal for battery-powered applications

LED dimming can be accomplished using several

methods; using a DC voltage to set the RSET pin

current, applying a PWM signal on the EN pin, or

adding a switched resistor in parallel with RSET. The

EN input pin allows the device to be placed in power-

down mode with “near-zero” quiescent current.

The device is available in the tiny 12-lead thin DFN

3mm x 3mm package with a max height of 0.8mm.

PIN CONFIGURATION

TYPICAL APPLICATION CIRCUIT

12-lead TDFN 3mm (Top view)

Note: Unused LED channels must be connected to VOUT.

同様の部品番号 - CAT3603

メーカー	部品番号	データシート	部品情報
ON Semiconductor	CAT3603	168Kb / 11P	3-Channel LED Driver in 3 x 3 mm Package January, 2010 ??Rev. 5
	CAT3603HV2	381Kb / 12P	3-Channel LED Driver in 3 x 3mm Package Doc. No. MD-5017 Rev. F
	CAT3603HV2	168Kb / 11P	3-Channel LED Driver in 3 x 3 mm Package January, 2010 ??Rev. 5

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