LM3508 Description
The LM3508 is a synchronous boost converter (no external Schottky diode required) that provides a constant current output. It is designed to drive up to 4 series white LEDs at 30mA from a single-cell Li-Ion battery. A single low power external resistor is used to set the maximum LED current.
LM3508 Key Features
- 2 Drives 4 Series White LEDs with up to 30mA
- >80% Peak Efficiency
- Up to 100kHz PWM Brightness Control
- Accurate ±5% LED Current Regulation across
- Internal Synchronous PFET (No Schottky
- True Shutdown Isolation
- Output Short-Circuit Protection
- 17.5V Over-Voltage Protection
- Internal Soft-Start Eliminates Inrush Current
- Wide Input Voltage Range: 2.7V to 5.5V