TPS72218DBVR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS72218DBVR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TPS72218DBVR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。

FEATURES

50-mA LDO

Available in 1.5-V, 1.6-V, and 1.8-V

Fixed-Output and Adjustable Versions

Low Input Voltage Requirement

Down to 1.8 V)

Small Output Capacitor, 0.1-μF

Dropout Voltage Typically 50 mV at 50 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

DESCRIPTION

The TPS722xx family of LDO regulators is available in

fixed voltage options that are commonly used to power

the latest DSP’s 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 (50 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. Thus, 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.