MAX1910 Description
The MAX1910/MAX1912 power LEDs with a regulated output voltage or current (up to 120mA) from an unregulated input supply (2.7V to 5.3V). These are plete DC-DC converters requiring only four small ceramic capacitors and no inductors. Input ripple is minimized by a unique regulation scheme that maintains a fixed 750kHz switching frequency over a wide load range.
MAX1910 Key Features
- High-Efficiency 1.5x/2x Charge Pumps
- Low Input Ripple with 750kHz Operation
- 200mV Current-Sense Threshold Reduces Power Loss
- Current- or Voltage-Regulated Charge Pump
- Up to 120mA Output Current
- No Inductors Required
- Small Ceramic Capacitors
- Regulated ±5% LED Current
- Load Disconnected in Shutdown
- 1µA Shutdown Current