DESCRIPTION
The UTC Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The output capacitor can be as small as 0.22 F, saving space and cost versus alternative solutions. A low 95mV feedback voltage minimizes power loss in the current setting resistor for better efficiency. 3 5 4 SOT-25 1 FEATURES
* Inherently Matched LED Current * High Efficiency: 84% Typical * Drives Up to Four LEDs from a 3.2V Supply * Drives Up to Six LEDs from a 5V Supply * 36V Rugged Bipolar Switch * Fast 1.2MHz Switching Frequency * Uses Tiny 1mm Tall Inductors * Requires Only 0.22 F Output Capacitor SOT-363 *Pb-free plating product number: L1937L APPLICATIONS
* Marking code: LTCG * Cellular Phones * PDAs, Handheld Computers * Digital Cameras * MP3 Players * GPS Receivers PIN FUNCTION PIN NO. PIN NO. PIN NAME (SOT-25) (SOT-363). 1 2 3 4 5 6 5 Switch Ground Feedback Shutdown Input Supply Ground SYMBOL SW GND FB FUNCTION Connect inductor/diode here.
Unisonic Technologies
