Sept 11 - 07 Rev E

SP7121 Low Dropout LED Driver

© 2007 Sipex Corporation

Page 1

FEATURES

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LED Driver for common cathode parallel

connected LEDs

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Ultra Low Dropout Voltage of 300mV @ 25mA

•

No EMI, no switching noise

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Integrated current matching

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PWM brightness control

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Enable/Shutdown control

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Shutdown current < 1µA

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Adjustable Output current up to 30mA per

channel

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Available in RoHS Compliant, Lead Free

Package: Small footprint SOT23-6

GENERAL DESCRIPTION

The SP7121 LED driver provides a simple solution for a matched current source for any color common

cathode LEDs. The common cathode connection allows the user to increase the LED power dissipation

by having the cathodes heat sinked to the ground plane of the circuit board. The SP7121 output current

value is set by an external resistor. At shutdown mode (EN pin is LOW), the supply current drops

TYPICAL APPLICATION

SP7121

2-Channel Adjustable Low Dropout

High Side Linear LED Driver

TYPICAL APPLICATION

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Mobile Phones

•

PDA, DSC, MP3 players

•

Handheld Computers

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Keypads and display backlight