LM3557 Datasheet (Texas Instruments)

LM3557, Step-Up Converter

The LM3557 is a complete solution for white LED drive applications.

With minimal external component count, no DC current leakage paths to ground, cycleby-cycle current limit protection, and output overvoltage protection circuitry, the LM3557 offer superior performance and cost savings over standard

LM3557 Features

* 1

* 2 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 groun