SC120集成電路（IC）的穩(wěn)壓器-線性規(guī)格書PDF中文資料

SC120屬于集成電路（IC）的穩(wěn)壓器-線性。由Semtech Corporation制造生產(chǎn)的SC120穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。

Description

The SC120 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. It features an internal 1.2A switch and synchronous rectifi er to achieve up to 94 efficiency and to eliminate the need for an external Schottky diode. The output voltage can be set to 3.3V with internal feedback, or to any voltage within the specified range using a standard resistor divider.

Features

■ Input voltage — 0.7V to 4.5V

■ Minimum input startup voltage — 0.865V

■ 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

■ Efficiency up to 94

■ Internal synchronous rectifier

■ Switching frequency — 1.2MHz

■ Automatic power save

■ Anti-ringing circuit

■ Operating supply current (measured at OUT) — 50μA

■ Shutdown current — 0.1μA (typ)

■ No forward conduction path during shutdown

■ Available in ultra-thin 1.5 × 2.0 × 0.6 (mm) MLPD-UT-6 and SOT23-6 packages

■ Lead-free and halogen-free

■ WEEE and RoHS compliant

Applications

■ MP3 players

■ Smart Phones and cellular phones

■ Palmtop computers and handheld Instruments

■ PCMCIA cards

■ Memory cards

■ Digital cordless phones

■ Personal medical products

■ Wireless VoIP phones

■ Small motors