TPS7A1485PYBKR集成電路（IC）的線性+開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

TPS7A1485PYBKR屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由德州儀器制造生產(chǎn)的TPS7A1485PYBKR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(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

? Ultra-low input voltage range: 0.7 V to 2.2 V

? High efficiency:

– Dropout voltage at 1 A: 70 mV (max, YBK)

– Specified for VIN = VOUT +100 mV

? Excellent load transient response:

– 20 mV for ILOAD = 3 mA to 600 mA in 20 μs

? Accuracy over load, line, and temperature: 1%

? High PSRR:

– 80 dB at 1 kHz (VOUT = 0.8 V, IOUT = 500 mA)

? Available in fixed-output voltages:

– 0.5 V to 2.0 V (in 25-mV steps)

? VBIAS range: 2.2 V to 5.5 V

? Packages:

– 6-pin DSBGA: 0.71 mm × 1.16 mm

– 6-pin WSON: 2 mm × 2 mm

? Active output discharge

2 Applications

? Camera modules

? Wireless headphones and earbuds

? Smart watch and fitness trackers

? Smart phones and tablets

? Portable medical devices

? Solid state drives (SSDs)

3 Description

The TPS7A14 is a small, ultra low-dropout regulator

(LDO) with excellent transient response. This device

can source 1 A with outstanding ac performance (load

and line transient responses). The input voltage range

is 0.7 V to 2.2 V, and the output range is 0.5 V to

2.0 V with a very high accuracy of 1% over load, line,

and temperature.

The primary power path is through the IN pin and can

be connected to a power supply as low as 50 mV

above the output voltage. All electrical characteristics

(including excellent output voltage tolerance, transient

response, and PSRR) are specified for input voltages

100 mV greater than the output voltage, thereby

yielding high practical efficiency. This regulator

supports very low input voltages with the use of a

higher, externally supplied VBIAS rail that is used to

power the internal circuitry of the LDO. For example,

the supply voltage to the IN pin can be the output

of a high-efficiency, DC/DC step-down regulator and

the BIAS pin supply voltage can be a rechargeable

battery.

The TPS7A14 is equipped with an active pulldown

circuit to quickly discharge the output when disabled,

and provides a known start-up state.

The TPS7A14 is available in a 2-mm × 2-mm, 6-pin

WSON package and an ultra-small 0.71-mm × 1.16-

mm, 6-bump WCSP package.