SP7121 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'SP7121' PDF : 10 Pages View PDF
January 2010
SP7121
2-Channel Adjustable Low Dropout High Side Linear
LED Driver
Rev. 2.0.0
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 to .04μA typical.
The SP7121 is available in a small footprint
RoHS compliant, lead-free and green/halogen
free 6-pin SOT23 packages.
APPLICATIONS
• Mobile Phones
• PDA, DSC, MP3 Players
• Handheld Computers
• Keypads and Displays Backlight
FEATURES
• LED Driver for Common Cathode
Parallel Connected LEDs
• Ultra Low Dropout Voltage
of 300mV @ 25mA
• No EMI, no Switching Noise
• Integrated Current Matching
• PWM Brightness Control
• Enable/Shutdown Control
• Shutdown Current < 1μA
• Adjustable Output Current up to 30mA
per Channel
• RoHS Compliant, Lead Free and
Halogen Free SOT23-6 Packages
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP7121 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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