Texas Instruments LM3557
Step-Up Converter
| Part No. | LM3557 |
|---|---|
| Datasheet | LM3557 Download |
| Manufacturer |  Texas Instruments |
| Description | Step-Up Converter |
| Buy | Stock & Price |
APPLICATIONS
Check for Samples: LM3557FEATURES
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 ground during shutdown
● Low Profile Package: <1 mm Height -8 Pin WSON
● No External Compensation
APPLICATIONS
● White LED Display Lighting● Cellular Phones
● PDAs
DESCRIPTION
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 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.
