The LM3557 is a complete solution for white LED drive applications. With minimal external component count, no DC current leakage paths to ground, cycle-by-cycle current limit protection, and output over-voltage protection circuitry, the LM3557 offer superior performance and cost savings over standard DC/DC boost component implementations.
●The LM3557 switches at a fixed-frequency of 1.25 MHz, which allows for the use of small external components. Also, the LM3557 has a wide input voltage range to take advantage of multi-cell input applications. With small external components, high fixed frequency operation, and wide input voltage range, the LM3557 is the most optimal choice for LED lighting applications.
● VIN Range: 2.7V–7.5V
● Small External Components
● 1.25 MHz Constant-Switching Frequency
● Output Over-Voltage Protection
● Input Under-Voltage Protection
● Cycle-By-Cycle Current Limit
● TRUE SHUTDOWN: No DC current paths to ground during shutdown
● Low Profile Package: <1 mm Height -8 Pin WSON
● No External Compensation
