SP7648
Low Reference High Efficiency Boost
Regulator
November 2012
GENERAL DESCRIPTION
The SP7648 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for single cell Li-Ion or dual cell alkaline battery applications to drive various LEDs.
The SP7648 combines low quiescent current and excellent light-load efficiency of PFM control.
The SP7648 features synchronous rectification, a 0.
3Ω charging switch, an anti-ringing inductor switch, under-voltage lockout and programmable inductor peak current.
The device can be shut down by a 1nA active LOW shutdown pin.
A very low 0.
288V reference voltage is optimized for driving a constant current load.
APPLICATIONS LED Dr...