SP7121 Datasheet, PDF (1/11 Pages) Sipex Corporation – 2-Channel Adjustable Low Dropout High Side Linear LED Driver

SP7121
2-Channel Adjustable Low Dropout
High Side Linear LED Driver
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
• Available in RoHS Compliant, Lead Free
Package: Small footprint SOT23-6
TYPICAL APPLICATION
• Mobile Phones
• PDA, DSC, MP3 players
• Handheld Computers
• Keypads and display backlight
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 driver is available in a small footprint 6-pin SOT23-6 package.
TYPICAL APPLICATION
Sept 11 - 07 Rev E
SP7121 Low Dropout LED Driver
Page 1
© 2007 Sipex Corporation