SC122 Datasheet PDF - Semtech Corporation

Description
The SC122 is a high efficiency, low noise, synchronous step-up DC-DC converter. It produces a fixed 3.3V output from a single cell alkaline or NiMH battery. It features an internal 1.2A switch and synchronous rectifier to achieve high efficiency and to eliminate the need for an external Schottky diode.

FEATUREs
■ Input voltage — 0.7V to 1.6V
■ Minimum start-up voltage — 0.85V
■ Output voltage fixed at 3.3V
■ Peak input current limit — 350mA typically
■ Output current 95mA at VIN = 1.6V, 50mA at VIN = 0.9V
■ Efficiency up to 80%
■ Internal synchronous rectifier
■ Switching frequency — 1.2MHz
■ Power save (voltage hysteretic) control
■ Anti-ringing circuit
■ Operating supply current (measured at OUT) — 40μA
■ No forward conduction path during shutdown
■ MLPD-UT-6 1.5 × 2.0 × 0.6 (mm) package
■ Lead-free and halogen-free
■ WEEE and RoHS compliant

APPLICATIONs
■ Electric toothbrushes
■ Personal medical products
■ Single-cell alkaline, NiCd, or NiMH applications