TLE4253集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TLE4253属于集成电路（IC）的线性+开关稳压器。由英飞凌科技股份公司制造生产的TLE4253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。

Functional Description

The TLE4253 is a monolithic integrated low-dropout voltage tracking regulator in small PG-DSO-8 packages. The exposed pad (EP) package variant PG-DSO-8 exposed pad offers extremely low thermal resistance. The IC is designed to supply off-board systems, e. g. sensors in engine 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 high accuracy. The reference voltage applied directly to the adjust input or by an e. g. external resistor divider can be 2.0 V at minimum.

The output is able to drive loads up to 250 mA at minimum while the device follows the e. g. 5 V output of a main voltage regulator acting as reference with high accuracy.

The TLE4253 tracker can be set into shutdown mode in order to reduce the quiescent current to an extremly low value. This makes the IC suitable to low power battery applications.

特性 Features

• Tight output tracking tolerance to reference

• Output voltage adjust down to 2.0 V

• Stable with ceramic output capacitor

• Flexibility of output voltage adjust higher or lower than reference, proportional to the reference voltage

• 250 mA output current capability

• Low dropout voltage

• Combined tracking / enable input

• Very low current consumption in OFF mode

• PG-DSO-8 packages with lowest thermal resistance

• Wide input voltage range -42 V ≤ VI ≤ 45 V

• Wide temperature range: -40 °C ≤ Tj ≤ 150 °C

• Output protected against short circuit to GND and battery

• Overtemperature protection

• Reverse polarity proof

• Suitable for use in automotive electronics

• Green Product (RoHS compliant)

• AEC Qualified