onsemi CAT3603
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. The CAT3603 drives 3 white LEDs in parallel and provides tightly matched regulated current to achieve uniform brightness in LCD backlighting applications. 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.| Part No. | CAT3603 |
|---|---|
| Datasheet | CAT3603 Download |
| Manufacturer |  onsemi |
| Description | 3-Channel LED Driver |
| Buy | Stock & Price |
DESCRIPTION
Operation at a constant switching frequency of 1 MHz allows the use of very small value ceramic capacitors. An external resistor, RSET, controls the output current level. 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 3 mm x 3 mm package with a max height of 0.8 mm.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 Device is Pb−Free, Hal...
