Texas Instruments LM3500
The LM3500 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 intergrated synchronous switching (no external schottky diode required) and a low feedback voltage (500mV), power efficiency of the LM3500 circuit has been optimized for lighting applications in wireless phones and other portable products (single cell Li-Ion or 3-cell NiMH battery supplies). The LM3500 operates with a fixed 1MHz switching frequency.| Part No. | LM3500 |
|---|---|
| Datasheet | LM3500 Download |
| Manufacturer |  Texas Instruments |
| Description | Synchronous Step-up DC/DC Converter |
| Buy | Stock & Price |
APPLICATIONS
Check for Samples: LM3500FEATURES
1●2 Synchronous Rectification, High Efficiency and no External Schottky Diode Required
● Uses Small Surface Mount Components
● Can Drive 2-5 White LEDs in Series – (May Function With More Low-VF LEDs)
● 2.7V to 7V Input Range
● Internal Output Over-Voltage Protection (OVP) Circuitry, with no External Zener Diode Required – LM3500-16: 15.5V OVP; LM3500-21: 20.5V OVP.
● True Shutdown Isolation
● Input Undervoltage Lockout
● Requires Only Small Ceramic Capacitors at the Input and Output
● Thermal Shutdown
● 0.1µA Shutdown Current
● Small 8-Bump Thin DSBGA Package
APPLICATIONS
● LCD Bias Supplies● White LED Backlighting
● Handheld Devices
● Digital Cameras
● Portable
APPLICATIONS
DESCRIPTION
When used with ceramic input and output capacitors, the LM3500 provides a small, low-noise, low-cost solution. Typical Application Circuit VIN 2.7V - 5.5V L 22 PH CIN 1PF Ceramic >1.1V <0.3V B1 VIN C2 VSW A3 NC LM3500-16 VOUT C1 A2 SHDN FB B3 AGND GND A...
