LM3508
FEATURES
- 2 Drives 4 Series White LEDs with up to 30m A
- >80% Peak Efficiency
- Up to 100k Hz PWM Brightness Control
- Accurate ±5% LED Current Regulation across
VIN range
- Internal Synchronous PFET (No Schottky
Diode Required)
- 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
- 850k Hz Fixed Frequency Operation
- Low Profile 9-Bump DSBGA Package
(1.514mm x 1.514mm x 0.6mm)
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 30m A from a single-cell Li-Ion battery. A single low power external resistor is used to set the maximum LED current. The LED current can be adjusted by applying a PWM signal of up to 100k Hz to the DIM pin. Internal soft-start circuitry is designed to eliminate high in-rush current at start-up. For...
