TPS721 - 低输入电压、150mA 低压降线性稳压器

TPS721是TI德州仪器公司的一款单通道LDO产品，TPS721是低输入电压、150mA 低压降线性稳压器，本站介绍了TPS721的封装应用图解、特点和优点、功能等，并给出了与TPS721相关的TI元器件型号供参考。

TPS721 - 低输入电压、150mA 低压降线性稳压器 - 单通道LDO - 线性稳压器(LDO) - 德州仪器

产品描述

The TPS721xx family of LDO regulators is available in fixed voltage options that are commonly used to power the latest DSPs and microcontrollers with an adjustable option ranging from 1.22 V to 2.5 V. These regulators can be used in a wide variety of applications ranging from portable, battery-powered equipment to PC peripherals. The family features operation over a wide range of input voltages (1.8 V to 5.5 V) and low dropout voltage (150 mV at full load). Therefore, compared to many other regulators that require 2.5-V or higher input voltages for operation, these regulators can be operated directly from two AAA batteries. Also, the typical quiescent current (ground pin current) is low, starting at 85 µA during normal operation and 1 µA in shutdown mode. These regulators can be operated very efficiently and, in a battery-powered application, help extend the longevity of the device.

Similar LDO regulators require 1-µF or larger output capacitors for stability. However, this regulator uses an internal compensation scheme that stabilizes the feedback loop over the full range of input voltages and load currents with output capacitances as low as 0.1-µF. Ceramic capacitors of this size are relatively inexpensive and available in small footprints.

This family of regulators is particularly suited as a portable power supply solution due to its minimal board space requirement and 1.8-V minimum input voltage. Being able to use two off-the-shelf AAA batteries makes system design easier and also reduces component cost. Moreover, the solution will be more efficient than if a regulator with a higher input voltage is used.

产品特性

150-mA LDO
Available in 1.5-V, 1.6-V, 1.8-V Fixed-Output and Adjustable (1.2-V to 2.5-V) Versions
Low Input Voltage Requirement (Down to 1.8 V)
Small Output Capacitor, 0.1-µF
Dropout Voltage Typically 200 mV at 150 mA
Less Than 1 µA Quiescent Current in Shutdown Mode
Thermal Protection
Over Current Limitation
5-Pin SOT-23 (DBV) Package
APPLICATIONS
- Portable Communication Devices
- Battery Powered Equipment
- PCMCIA Cards
- Personal Digital Assistants
- Modems
- Bar Code Scanners
- Backup Power Supplies
- SMPS Post Regulation
- Internet Audio

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