升压芯片之TPS61020_DataSheet.pdf

TPS61020, TPS61024 (3,25 mm x 3,25 mm) TPS61025, TPS61027 SLVS451A – SEPTEMBER 2003 – REVISED APRIL 2004 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH FEATURES DESCRIPTION • 96% Efficient Synchronous Boost Converter The TPS6102x devices provide a power supply – 200-mA Output Current From 0.9-V Input solution for products powered by either a one-cell, – 500-mA Output Current From 1.8-V Input two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Output currents • Output Voltage Remains Regulated When In- can go as high as 200 mA while using a single-cell put Voltage Exceeds Nominal Output Voltage alkaline, and discharge it down to 0.9 V. It can also • Device Quiescent Current: 25-µA (Typ) be used for generating 5 V at 500 mA from a 3.3-V • Input Voltage Range: 0.9-V to 6.5-V rail or a Li-Ion battery. The boost converter is based on a fixed frequency, pulse-width-modulation (PWM) • Fixed and Adjustable Output Voltage Options controller using a synchronous rectifier to obtain Up to 5.5-V maximum efficiency. At low load currents the con- • Power S