LM3519
Overview
The LM3519 drives up to 4 white LEDs with constant current to provide LCD backlighting in handheld devices. The LED current is internally set to 20mA.
- 2 Drives 2 to 4 LEDs at 20mA
- Up to 30kHz PWM Dimming Control Capability
- >80% Peak Efficiency
- Up to 8MHz Switching Frequency
- Small External Components: 1µH -
- 3µH(typ.2.2μH) Inductor and 1µF Output Capacitor
- True Shutdown Isolation
- Over-Voltage Protection
- Wide Input Voltage Range: 2.7V to 5.5V
- Small Footprint SOT-23 Package
