TPS73218DBVR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS73218DBVR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TPS73218DBVR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

• Stable with no output capacitor or any value or

type of capacitor

• Input voltage range: 1.7V to 5.5V

• Ultra-low dropout voltage: 40mV typical at 250mA

• Excellent load transient response—with or without

optional output capacitor

• NMOS topology provides low reverse leakage

current

• Low noise: 30μVRMS typical (10kHz to 100kHz)

• 0.5% initial accuracy

• 1% overall accuracy (line, load, and temperature)

• Less than 1μA maximum IQ in shutdown mode

• Thermal shutdown and specified min and max

current limit protection

• Available in multiple output voltage versions:

– Fixed outputs of 1.2V to 5V

– Adjustable outputs from 1.2V to 5.5V

– Custom outputs available

2 Applications

• Portable and battery-powered equipment

• Post-regulation for switching supplies

• Noise-sensitive circuitry such as VCOs

• Point of load regulation for DSPs, FPGAs, ASICs,

and microprocessors

3 Description

The TPS732 low-dropout (LDO) voltage regulator

uses an NMOS pass transistor in a voltage-follower

configuration. This topology is stable using output

capacitors with low equivalent series resistance

(ESR), and even allows operation without a capacitor.

The device also provides high reverse blockage (low

reverse current) and ground pin current that is nearly

constant over all values of output current.

The TPS732 uses an advanced BiCMOS process

to yield high precision while delivering very low

dropout voltages and low ground pin current. Current

consumption, when not enabled, is less than 1μA and

designed for portable applications. The extremely low

output noise (30μVRMS with 0.1μF CNR) is designed

for powering VCOs. This device is protected by

thermal shutdown and foldback current limit.