TPS7B4255数据手册TI中文资料规格书

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):
• Absolute maximum input range: –40 V to +45 V

• Wide output voltage range: 2 V to 30 V
• Very-tight, output-tracking tolerance: 5 mV (max)
• Low dropout voltage: 500 mV (max) at 70 mA
• Reverse polarity protection
• Reverse current protection
• Combined reference and enable input
• Low quiescent current at light loads (100-µA load):
• 50 µA (max)

• Wide ESR range:
• Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESR

• Overtemperature protection
• Output short-circuit protection to ground and supply
• Junction temperature: –40°C to +150°C, TJ
• Available in 5-pin SOT-23 DBV package
• Buffers signals up to 1 kHz (see the Signal-Buffering LDO section)