TPS7B4255中文资料70-mA 40-V voltage-tracking low-dropout (LDO) regulator with 5-mV tracking tolerance数据手册TI规格书

描述 Description

The TPS7B4255 is a low-dropout (LDO) voltage-tracking regulator, with high tracking accuracy and excellent load and line transient response. The device is available in a 5-pin, SOT-23 (DBV) package. The TPS7B4255 is designed to supply off-board sensors in industrial applications such as condition monitoring sensor systems. The device provides integrated protection features such as reverse polarity, output short to supply and ground, current limit, and thermal shutdown to protect against the high risk of cable failures in an off-board power system. The device is designed to survive a 45-V (absolute maximum) input voltage during extreme transient events.

A reference voltage applied at the ADJ/EN pin is effectively tracked with high accuracy for loads up to 70 mA. The high tracking accuracy provides accurate power supply to off-board modules and enables better accuracy when making measurements using ratiometric sensors.

By setting the ADJ/EN input pin low, the TPS7B4255 switches to standby mode and reduces the quiescent current to the minimum value.

特性 Features

• Wide input operating voltage range (3 V to 40 V):
• Wide output voltage range: 2 V to 30 V
• Low dropout voltage: 500 mV (max) at 70 mA
• Reverse current protection
• Low quiescent current at light loads (100-µA load):
• Wide ESR range:
• Overtemperature protection
• Junction temperature: –40°C to +150°C, TJ
• Buffers signals up to 1 kHz (see the Signal-Buffering LDO section)