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线性和低压降 (LDO) 稳压器

TPS798-Q1

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具有反向电流保护功能的汽车类 50mA、电池供电运行 (50V)、低压降稳压器

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TPS798-Q1

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产品详情

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.05 Vin (max) (V) 50 Vin (min) (V) 3 Vout (max) (V) 28 Vout (min) (V) 1.275 Fixed output options (V) 5 Noise (µVrms) 100 Iq (typ) (mA) 0.04 Thermal resistance θJA (°C/W) 57 Rating Automotive Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Reverse Current Protection, Reverse voltage protection, Short-to-battery protection Accuracy (%) 3 PSRR at 100 KHz (dB) 36 Dropout voltage (Vdo) (typ) (mV) 300 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.05 Vin (max) (V) 50 Vin (min) (V) 3 Vout (max) (V) 28 Vout (min) (V) 1.275 Fixed output options (V) 5 Noise (µVrms) 100 Iq (typ) (mA) 0.04 Thermal resistance θJA (°C/W) 57 Rating Automotive Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Reverse Current Protection, Reverse voltage protection, Short-to-battery protection Accuracy (%) 3 PSRR at 100 KHz (dB) 36 Dropout voltage (Vdo) (typ) (mV) 300 Operating temperature range (°C) -40 to 125
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
  • Wide input voltage range: 3V to 50V
  • Low quiescent current: 40µA (typical)
  • Low dropout voltage: 300mV (typical)
  • Output current: 50mA
  • No input protection diodes needed
  • Adjustable output: From 1.275V to 28V
  • Quiescent current in shutdown: 1µA
  • Stable with 1µF output capacitor
  • Stable with aluminum, tantalum, or ceramic capacitors
  • Reverse input-battery protection
  • Reverse output current flow protection
  • Thermal limiting
  • Available in an 8-pin HVSSOP PowerPAD device package
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
  • Wide input voltage range: 3V to 50V
  • Low quiescent current: 40µA (typical)
  • Low dropout voltage: 300mV (typical)
  • Output current: 50mA
  • No input protection diodes needed
  • Adjustable output: From 1.275V to 28V
  • Quiescent current in shutdown: 1µA
  • Stable with 1µF output capacitor
  • Stable with aluminum, tantalum, or ceramic capacitors
  • Reverse input-battery protection
  • Reverse output current flow protection
  • Thermal limiting
  • Available in an 8-pin HVSSOP PowerPAD device package

The TPS798-Q1 is the first device in a line of 50V high-voltage micropower low-dropout (LDO) linear regulators. This device is capable of supplying 50mA output current with a dropout voltage of only 300mV. Created for low quiescent current, high-voltage (50V) applications, the 40µA operating and 1µA quiescent current in shutdown makes the TPS798-Q1 designed for battery-powered or high-voltage systems. Quiescent current is also well-controlled in dropout.

Other features of the TPS798-Q1 include the ability to operate with low equivalent series resistance (ESR) ceramic output capacitors. This device is stable with only 1µF on the output; most older devices require from 10µF to 100µF tantalum capacitors for stability. Small ceramic capacitors can be used without the necessary addition of ESR, as is common with other regulators. Internal protection circuitry includes reverse input-battery protection, reverse output current protection, current limiting, and thermal limiting to protect the device in various fault conditions.

This device is available in a fixed output voltage of 5V (TPS79850) and with an adjustable output voltage with a 1.275V reference voltage (TPS79801). The TPS798-Q1 regulator is available in a 8-pin HVSSOP PowerPAD (DGN) package with an exposed pad for enhanced thermal management capability.

The TPS798-Q1 is the first device in a line of 50V high-voltage micropower low-dropout (LDO) linear regulators. This device is capable of supplying 50mA output current with a dropout voltage of only 300mV. Created for low quiescent current, high-voltage (50V) applications, the 40µA operating and 1µA quiescent current in shutdown makes the TPS798-Q1 designed for battery-powered or high-voltage systems. Quiescent current is also well-controlled in dropout.

Other features of the TPS798-Q1 include the ability to operate with low equivalent series resistance (ESR) ceramic output capacitors. This device is stable with only 1µF on the output; most older devices require from 10µF to 100µF tantalum capacitors for stability. Small ceramic capacitors can be used without the necessary addition of ESR, as is common with other regulators. Internal protection circuitry includes reverse input-battery protection, reverse output current protection, current limiting, and thermal limiting to protect the device in various fault conditions.

This device is available in a fixed output voltage of 5V (TPS79850) and with an adjustable output voltage with a 1.275V reference voltage (TPS79801). The TPS798-Q1 regulator is available in a 8-pin HVSSOP PowerPAD (DGN) package with an exposed pad for enhanced thermal management capability.
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* 数据表 TPS798-Q1 Automotive, 50mA, 3V to 50V, Micropower, Low-Dropout Linear Regulator 数据表 (Rev. F) PDF | HTML 2024年 4月 24日

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参考设计

TIDA-010261 — 10BASE-T1L 采用数据线供电的单线对以太网传感器参考设计

该参考设计展示了单线对以太网 (SPE) 通信后端的实现，包括数据线供电 (PoDL)。该设计使用 Sitara™ AM2434 MCU，一侧连接模拟前端，另一侧连接以太网物理 (PHY) 层。功能强大的 MCU 不仅可以将传感器数据转发到以太网，还可以在边缘执行数据处理。
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