DESCRIPTION
The LM1938 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current.
The device can drive up to 27 LEDs from a 5V supply.
Additional feature include output voltage limiting when LEDs are disconnected.

FEATURES
- Inherently Matched LED Current
- Drives Up to 27 LEDs from a 5V Supply
- 36V Rugged Bipolar Switch
- Fast 1.2MHz Switching Frequency
- Vovp(MAX) = 29V
- Moisture Sensitivity Level 3

APPLICATION
- Cellular Phones
- PDAs, Handheld Computers
- Digital Cameras
- MP3 Players
- GPS Receivers