TPS72748YFFT屬于集成電路（IC）的線(xiàn)性+開(kāi)關(guān)穩(wěn)壓器。由美國(guó)德州儀器公司制造生產(chǎn)的TPS72748YFFT穩(wěn)壓器 - 線(xiàn)性線(xiàn)性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無(wú)論負(fù)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(gè)最小量，并且在工作時(shí)會(huì)將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對(duì)于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開(kāi)關(guān)模式的穩(wěn)壓器，但它們通常更適合對(duì)噪聲高度敏感的應(yīng)用。

1 Features

1? Very Low Dropout:

– 65 mV Typical at 100 mA

– 130 mV Typical at 200 mA

– 163 mV Typical at 250 mA

? 2% Accuracy Over Load, Line, Temperature

? Ultralow IQ: 7.9 μA

? Excellent Load Transient Performance:±50 mV for

200 mA Loading and Unloading Transient chip?

Available in Fixed-Output Voltages From 0.9 V to

5 V Using Innovative Factory EEPROM

Programming

? High PSRR: 70 dB at 1 kHz

? Stable with a 1.0-μF Ceramic Capacitor

? Thermal Shutdown and Overcurrent Protection

? Available in 4-Ball, 0.4-mm Pitch Wafer-Level

Chip Scale and 1.5-mm × 1.5-mm SON Packages

2 Applications

? Wireless Handsets, Smart Phones, PDAs

? MP3 Players and Other Handheld Products

? Wireless LAN, Bluetooth?, Zigbee?

? Remote Controls

? Portable Consumer Products

3 Description

The TPS727 family of low-dropout (LDO) linear

regulators are ultralow quiescent current LDOs with excellent line and ultra-fast load transient

performance and are designed for power-sensitive

applications. The LDO output voltage level is preset

by the use of innovative factory EEPROM programming. A precision band-gap and error

amplifier provides overall 2% accuracy over load, line,

and temperature extremes. The TPS727 family is

available in 1.5-mm × 1.5-mm SON and wafer chip?

scale (WCSP) packages that make the devices ideal

for handheld applications. This family of devices is fully specified over a temperature range of TJ =

–40°C to +125°C.