CAT37 Description
The CAT37 is a DC/DC step up converter that delivers a regulated output current. Operation at a constant switching frequency of 1.2 MHz allows the device to be used with very small value external inductor and ceramic capacitors. The CAT37 is targeted to drive multiple white light−emitting diodes (LEDs) connected in series and provides the necessary regulated current to control the brightness and the color purity.
CAT37 Key Features
- Low Quiescent Ground Current (0.5 mA Typical)
- Power Efficiency Over 80%
- patible Pinout with LT1937
- Adjustable Output Current (up to 40 mA)
- High Frequency 1.2 MHz Operation
- Input Voltage Operation down to 2.5 V
- Low Resistance (0.5 W) Power Switch
- Drives up to 4 White LEDs in Series
- Shutdown Current Less than 1 mA
- Load Fault Protection Against Open-circuits