Description
The CAT4003B and CAT4004B provide respectively three and four
matched low dropout current sources to drive LEDs.The CAT400XB requires no external RSET resistor.The LED current is internally set to 25 mA when the device is first enabled.Each LED channel includes an individual control loop allowing the device to handle a wide range of LED forward voltages while still maintaining tight current matching.The EN/DIM logic input supports the device enable and a digital dimming interface for setting.
Features
- 3, 4 LED Current Sinks with Tight Matching.
- 32 Dimming Levels.
- Low Dropout Driver 75 mV at 20 mA.
- No Switching Noise.
- Shutdown Current less than 1 mA.
- 25 mA Max LED Current per Channel.
- Dimming via 1-wire EZDim Interface.
- Thermal Shutdown Protection.
- RoHS Compliant.
- 6-lead TSOT-23, TSOP, SC-70, and 8-pad UDFN 2 mm x 2 mm
Packages
Typical.
