LM3501 Description
The LM3501 is a fixed-frequency step-up DC/DC converter that is ideal for driving white LEDs for display backlighting and other lighting functions. With fully integrated synchronous switching (no external schottky diode required) and a low feedback voltage (515 mV), power efficiency of the LM3501 circuit has been optimized for lighting applications in wireless phones and other portable products (single cell Li-Ion...
LM3501 Key Features
- 2 Synchronous Rectification, High Efficiency and no External Schottky Diode required
- Uses Small Surface Mount ponents
- Can Drive 2-5 White LEDs in Series (May
- 2.7V to 7V Input Range
- True Shutdown Isolation, no LED Leakage
- DC Voltage LED Current Control
- Input Undervoltage Lockout
- Internal Output Over-Voltage Protection (OVP)
- Requires Only a Small 16V (LM3501-16) or 25V (LM3501-21) Ceramic Capacitor at the Input and Output
- Thermal Shutdown