SP6691

® SP6691 Micro Power Boost Regulator Series White LED Driver FEATURES ■ Drives up to 6 LED's @ 25mA ■ Drives up to 8 LED's @ 20mA ■ High Output Voltage: Up to 34V ■ Optimized for Single Supply, 2.7V - 4.2V Applications ■ Operates Down to 1V ■ High Efficiency: Greater Than 75% ■ Low Quiescent Current: 20µA ■ Ultra Low Shutdown Current: 10nA ■ Single Battery Cell Operation ■ Programmable Output Voltage ■ 1Ω switch (350mV at 350mA) ■ Available in 8 Pin DFN, 5 Pin TSOT or 5 Pin SOT23 NC FB NC SW 1 2 3 4 8 GND SP6691 8 Pin DFN 7 VIN 6 VEN 5 NC Now Available in Lead Free Packaging APPLICATIONS ■ White LED Driver ■ High Voltage Bias ■ Digital Cameras ■ Cell Phone ■ Battery Backup ■ Handheld Computers DESCRIPTION The SP6691 is a micro power boost regulator that is specifically designed for powering series configuration white LED. The part utilizes fixed off time architecture and consumes only 10nA quiescent current in shutdown. Low voltage operation, down to 1V, fully utilizes maximal battery life. The SP6691 is offered in a 8 Pin DFN, 5-pin SOT-23 or 5 Pin TSOT package and enables the construction of a complete regulator occupying < 0.2 in2 board space. TYPICAL APPLICATION CIRCUIT 10µH 2.7 to 4.2V L1 D1 SW ® VIN SP6691 SHDN 4.7µF GND C1 FB C2 2.2 µF Rb Date: 5/25/04 SP6691 Micro Power Boost Regualtor, Series White LED Driver © Copyright 2004 Sipex Corporation5 1 ABSOLUTE MAXIMUM RATINGS VIN ....................................................................... 1...