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

應(yīng)用 Application

·Sensor Supply
·Heat distribution
·Secondary μcontroller supply

簡介

TLE4254屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的TLE4254穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。