TLE4254数据手册集成电路（IC）的线性+开关稳压器规格书PDF

描述 Description

The TLE4254EJ A is a monolithic integrated low-dropout voltage tracking regulator with high accuracy in small PG- DSO-8 packages. The IC is designed to supply off-board systems, e.g. sensors in powertrain management systems under the severe conditions of automotive applications. Therefore, the IC is equipped with additional protection functions against reverse polarity and short circuit to GND and battery. With supply voltages up to 40 V, the output voltage follows a reference voltage applied at the adjust input with very high accuracy. The reference voltage applied directly to the adjust input or by an e.g. external resistor divider can be 2.0 V minimum. The output is able to drive loads up to 70 mA while the device follows with high accuracy the e. g. 5 V output of a main voltage regulator acting as a reference.

特性 Features

·70 mA output current capability
·Very tight output tracking tolerance to reference
·Output voltage adjustable down to 2.0 V
·Stable operation with 1 µF ceramic output capacitor
·Flexibility of output voltage adjust higher or lower than reference, proportional to the reference voltage (version GA / EJ A)
·Status output to indicate short circuits at the output (version GS / EJ S)
·Very low dropout voltage of typ. 0.2 V @ maximum output current
·Combined reference / enable input
·Very low current consumption in OFF mode
·Wide input voltage range -20 V ≤ V I  ≤ +45 V
·Wide temperature range: -40 °C ≤ T j  ≤ 150 °C
·Output protected against short circuit to GND and battery
·Input protected against reverse polarity
·Overtemperature protection
·Green product (RoHS compliant)
·AEC qualified

应用 Application

·Sensor Supply
·Heat distribution
·Secondary µcontroller supply

简介

TLE4254属于集成电路（IC）的线性+开关稳压器。由制造生产的TLE4254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。