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CAT3603 - 3-Channel LED Driver

General 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 1 MHz allows the use of very small value ceramic capacitors.

Key Features

  • Drives up to 3 LEDs.
  • Current Setting Resistor.
  • Compatible with Supply Voltage of 3 V to 5.5 V.
  • Power Efficiency up to 91%.
  • Output Current up to 30 mA per LED.
  • Fractional Pump 1x/1.5x.
  • Low Noise Input Ripple.
  • Fixed High Frequency Operation 1 MHz.
  • “Zero” Current Shutdown Mode.
  • Soft Start and Current Limiting.
  • Short Circuit Protection.
  • 12.
  • lead TDFN 3 mm x 3 mm Package.
  • This.

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Datasheet Details

Part number CAT3603
Manufacturer onsemi
File Size 224.37 KB
Description 3-Channel LED Driver
Datasheet download datasheet CAT3603 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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CAT3603 3-Channel LED Driver in 3 x 3 mm Package 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 1 MHz 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 30 mA over an input voltage supply range from 3 V to 5.5 V, making it ideal for battery− powered applications.