TLV1117LV25DCYT集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TLV1117LV25DCYT属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的TLV1117LV25DCYT稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

1 Features

• Typical accuracy: 1.5%

• Low IQ: 100 μA (maximum)

– 500 times lower than standard 1117 devices

• VIN: 2 V to 5.5 V

– Absolute maximum VIN: 6 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 specified 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

• For drop-in replacement with upgraded

functionality, see the TLV761

• Available in a SOT-223 package

– See the Mechanical, Packaging, and Orderable

Information section at the end of this document

for a complete list of available voltage options.

2 Applications

• Set-top boxes

• TVs and monitors

• PC peripherals, notebooks, motherboards

• Modems and other communication products

• Switching power supply post-regulation

3 Description

The TLV1117LV low-dropout (LDO) linear regulator is

a low input voltage version of the popular TLV1117

voltage regulator.

The TLV1117LV is an extremely low-power device

that consumes 500 times lower quiescent current

than traditional 1117 voltage regulators, making the

device designed for applications that mandate very

low standby current. The TLV1117LV LDO is also

stable with 0 mA of load current; there is no

minimum load requirement, making the device a

good choice for applications where the regulator must

power very small loads during standby in addition

to large currents on the order of 1 A during normal

operation. The TLV1117LV offers excellent line and

load transient performance, resulting in very small

magnitude undershoots and overshoots of output

voltage 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 (PSRR) enables use of the device 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 costeffective,

small-size ceramic capacitors. Cost-effective

capacitors that have higher bias voltages and

temperature derating can also be used if desired.

The TLV1117LV is available in a SOT-223 package.