SC122中文资料低电压同步升压转换器数据手册Semtech规格书

描述 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.

特性 Features

·Input voltage - 0.7V to 1.6V
·Minimum start-up voltage - 0.85V
·Output voltage fi xed 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 x 2.0 x 0.6 (mm) package
·Lead-free and halogen-free WEEE and RoHS compliant

应用 Application

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