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线性和低压降 (LDO) 稳压器

TPS7B4255

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具有 5mV 跟踪容差的 70mA 40V 电压跟踪低压降 (LDO) 稳压器

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TPS7B4255

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产品详情

Output options Tracking Output Iout (max) (A) 0.07 Vin (max) (V) 40 Vin (min) (V) 3 Vout (max) (V) 30 Vout (min) (V) 2 Noise (µVrms) 150 Iq (typ) (mA) 0.031 Thermal resistance θJA (°C/W) 127 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection PSRR at 100 KHz (dB) 70 Dropout voltage (Vdo) (typ) (mV) 500 Operating temperature range (°C) -40 to 125
Output options Tracking Output Iout (max) (A) 0.07 Vin (max) (V) 40 Vin (min) (V) 3 Vout (max) (V) 30 Vout (min) (V) 2 Noise (µVrms) 150 Iq (typ) (mA) 0.031 Thermal resistance θJA (°C/W) 127 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection PSRR at 100 KHz (dB) 70 Dropout voltage (Vdo) (typ) (mV) 500 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • 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)
  • 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)

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.

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.
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* 数据表 TPS7B4255 70-mA, 40-V, Voltage-Tracking LDO With Voltage-Buffering Capability 数据表 PDF | HTML 2022年 12月 14日

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评估板

TPS7B4255EVM-062 — TPS7B4255 70mA、40V 电压跟踪低压降 (LDO) 稳压器评估模块

TPS7B4255EVM-062 评估模块 (EVM) 用于评估 TPS7B4255-Q1 线性稳压器在电路应用中使用时的运行情况和性能。

此特定 EVM 配置包含一个适用于汽车应用的 70mA、高电压、低压降 (LDO) 电压跟踪稳压器，以及一个针对超低寄生测量进行优化的板载负载瞬态电路。该稳压器能够以 3mV 的跟踪容差提供高达 70mA 的电流、并且具有高达 40V 的宽输入电压 (VIN) 范围和高达 45V 的瞬态电压。为了确保 TPS7B4255-Q1 的稳定性，请使用等效串联电阻 (ESR) 小于 3Ω 的 1µF（或更大）的输出电容器。

用户指南: PDF | HTML
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仿真模型

TPS7B4255-Q1 PSpice Transient Model (Rev. A)

SBVM991A.ZIP (18 KB) - PSpice Model
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包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
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  • 制造厂地点
  • 封装厂地点

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