SC121中文资料低电压同步升压调节器数据手册Semtech规格书

描述 Description

The SC121 is a high efficiency, low noise, synchronous step-up DC-DC converter that provides boosted voltage levels in low-voltage handheld applications. The wide input voltage range allows use in systems with single NiMH or alkaline battery cells as well as in systems with higher voltage battery supplies.

特性 Features

·Input voltage — 0.7V to 4.5V
·Minimum start-up voltage — 0.85V
·Output voltage — fixed at 3.3V; adjustable from 1.8V to 5.0V
·Peak input current limit — 1.2A
·Output current at 3.3 VOUT — 80mA with VIN = 1.0V,
·190mA with VIN = 1.5V
·Forced PWM operation at all loads
·Efficiency up to 94%
·Internal synchronous rectifier
·No forward conduction path during shutdown
·Switching frequency — 1.2MHz
·Soft-start startup current limiting
·Shutdown current — 0.1μA (typ)
·Ultra-thin 1.5 x 2.0 x 0.6 (mm) MLPD-UT-6 package
·Lead-free and halogen-free
·WEEE and RoHS compliant

应用 Application

·MP3 players
·Smart phones and cellular phones
·Palmtop computers and handheld instruments
·PCMCIA cards and memory cards
·Digital cordless phones
·Personal medical products
·Wireless VoIP phones
·Small motors