®
SP6644/6645
Single/Dual Alkaline Cell, High Efficiency Boost DC-DC
Regulator
■ 90mA Output Current at 1.
3V Input ■ 190mA Output Current at 2.
6V Input ■ +2V to +5.
5V Output Range ■ 0.
88V Guaranteed Start-Up ■ 92% High Efficiency ■ 1.
6µA Quiescent Supply Current at VBATT ■ Reverse Battery Protection ■ Internal Synchronous Rectifier ■ 5nA Logic Controlled Shutdown Current
From VBATT ■ Low-Battery Detection Active LOW Output
VBAT 1 BATTL0 2
RLIM 3 SHDN 4
SP6644 SP6645
8 Pin MSOP
8 V OUT 7 LX 6 GND 4 FB
Now Available in Lead Free Packaging ■ Small 8 Pin MSOP Package ■ No External FETs ■ Flexibility to Optimize Inductor Type
with Programmable Peak Current Control
DESCRIPTION
The SP6644/...