TPS7A2045PDQNR集成電路（IC）的線性+開關穩(wěn)壓器規(guī)格書PDF中文資料

TPS7A2045PDQNR屬于集成電路（IC）的線性+開關穩(wěn)壓器。由德州儀器制造生產的TPS7A2045PDQNR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換為熱量。對于大多數應用而言，雖然這種穩(wěn)壓器的效率低于開關模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應用。

1 Features

? Low output voltage noise: 7 μVRMS

– No noise-bypass capacitor required

? High PSRR: 95 dB at 1 kHz

? Very low IQ: 6.5 μA

? Input voltage range: 1.6 V to 6.0 V

? Output voltage range: 0.8 V to 5.5 V

? Output voltage tolerance: ±1.5% (max)

? Very low dropout:

– 140 mV (max) at 300 mA (VOUT = 3.3 V)

– 145 mV (max) at 300 mA (VOUT = 3.3 V, DBV)

? Low inrush current

? Smart enable pulldown

? Stable with 1-μF minimum ceramic output

capacitor

? Packages:

– 1-mm × 1-mm X2SON

– 0.616-mm × 0.616-mm DSBGA

– 2.90-mm × 1.60-mm SOT23-5

2 Applications

? Smartphones and tablets

? IP network cameras

? Portable medical equipment

? Smart meters and field transmitters

? Motor drives

? Wearables

3 Description

The TPS7A20 is an ultra-small, low-dropout (LDO)

linear regulator that can source 300 mA of output

current. The TPS7A20 is designed to provide low

noise, high PSRR, and excellent load and line

transient performance that can meet the requirements

of RF and other sensitive analog circuits. Using

innovative design techniques, the TPS7A20 offers an

ultra-low noise performance without the addition of a

noise bypass capacitor. The TPS7A20 also provides

the advantage of low quiescent current, which can be

ideal for battery-powered applications. With an input

voltage range of 1.6 V to 6.0 V and an output range of

0.8 V to 5.5 V, the TPS7A20 can be used for a wide

variety of applications. The device uses a precision

reference circuit to provide a maximum accuracy of

1.5% over load, line, and temperature variations.

The TPS7A20 features an internal soft-start to lower

the inrush current, thus minimizing the input voltage

drop during start up. The device is stable with

small ceramic capacitors, allowing for a small overall

solution size.

The TPS7A20 has a smart enable input circuit with an

internally controlled pulldown resistor that keeps the

LDO disabled even when the EN pin is left floating

and helps eliminate the external components used to

pulldown the EN pin.