TLV117112DCYR屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由美國德州儀器公司制造生產(chǎn)的TLV117112DCYR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。

1FEATURES

2? Accuracy: 1.5% (typ)

? Low IQ: 100 μA (max)

– 500x Lower Than Standard 1117 Devices

? VIN: 2.0 V to 5.5 V

– Absolute Maximum VIN: 6.0 V

? Stable with 0-mA Output Current

? Low Dropout: 455 mV at 1 A for VOUT = 3.3 V

? High PSRR: 65 dB at 1 kHz

? Minimum Ensured Current Limit: 1.1 A

? Stable with Cost-Effective Ceramic Capacitors:

– With 0-Ω ESR

? Temperature Range: –40°C to +125°C

? Thermal Shutdown and Overcurrent Protection

? Available Package: SOT223

– See the Package Option Addendum at the

end of this document for a complete list of

available voltage options.

APPLICATIONS

? Set Top Boxes

? TVs and Monitors

? PC Peripherals, Notebooks, and Motherboards

? Modems and Other Communication Products Cost?

Switching Power-Supply Post-Regulation

DESCRIPTION

The TLV1171 low-dropout (LDO) linear regulator is a

low input voltage version of the popular 1117 voltage

regulator.

The TLV1171 is an extremely low-power device that

consumes 500x lower quiescent current than the

traditional 1117 voltage regulator, making the

TLV1171 suitable for applications that mandate very

low standby current. The TLV1171 LDO is also stable

with 0 mA of load current; there is no minimum load

requirement, making the device an ideal choice for

applications where the regulator is required to power

very small loads during standby in addition to large currents on the order of 1 A during normal operation.

The TLV1171 offers excellent line and load transient

performance, resulting in very small magnitude output

voltage undershoots and overshoots when the load

current requirement changes from less than 1 mA to

more than 500 mA.

A precision band gap and error amplifier provides

1.5% accuracy. A very high power-supply rejection

ratio enables the device to be used for postregulation

after a switching regulator. Other valuable

features include low output noise and low-dropout

voltage.

The device is internally compensated to be stable

with 0-Ω equivalent series resistance (ESR)

capacitors. These key advantages enable the use of

cost-effective, small-size ceramic capacitors. Cost?

effective capacitors that have higher bias voltages

and temperature derating can also be used if desired.

The TLV1171 is available in a SOT223 package. For

alternate pin outs of the device, refer to the

TLV1117LV.