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線性與低壓差 (LDO) 穩壓器

TPS7B4255-Q1

現行

具 5-mV 追蹤公差的車用、70-mA、40-V 電壓追蹤低壓降 (LDO) 穩壓器

立即訂購
產品規格表

TPS7B4255-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Vin (max) (V) 40 Vin (min) (V) 3 Iout (max) (A) 0.07 Output options Tracking Output Vout (max) (V) 40 Vout (min) (V) 2 Noise (µVrms) 150 Iq (typ) (mA) 0.031 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection Thermal resistance θJA (°C/W) 127, 176 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Dropout voltage (Vdo) (typ) (mV) 500 Operating temperature range (°C) -40 to 125
Rating Automotive Vin (max) (V) 40 Vin (min) (V) 3 Iout (max) (A) 0.07 Output options Tracking Output Vout (max) (V) 40 Vout (min) (V) 2 Noise (µVrms) 150 Iq (typ) (mA) 0.031 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection Thermal resistance θJA (°C/W) 127, 176 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 1 Regulated outputs (#) 1 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 SOT-23 (DYB) 5 7.911 mm² 2.93 x 2.7
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • Junction temperature: –40°C to +150°C, TJ
  • Wide input operating voltage range (3 V to 40 V):
    • Absolute maximum input voltage range: –40 V to +45 V
  • Wide output voltage range: 2 V to 40 V
  • Maximum output current: 70 mA
  • Very-tight, output-tracking tolerance: 5 mV (max)
  • Low dropout voltage: 500 mV (max) at 70 mA
  • Combined reference and enable functionalities
  • Low quiescent current at light load: 35 µA
  • Wide COUT and ESR range:
    • Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESR
  • Integrated protection features:
    • Reverse current protection
    • Reverse polarity protection
    • Overtemperature protection
    • Protection against output short-circuit to ground and supply
  • Available in two 5-pin SOT-23 packages:
    • Standard SOT-23 (DBV)
    • Thermally enhanced SOT-23 (DYB)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • Junction temperature: –40°C to +150°C, TJ
  • Wide input operating voltage range (3 V to 40 V):
    • Absolute maximum input voltage range: –40 V to +45 V
  • Wide output voltage range: 2 V to 40 V
  • Maximum output current: 70 mA
  • Very-tight, output-tracking tolerance: 5 mV (max)
  • Low dropout voltage: 500 mV (max) at 70 mA
  • Combined reference and enable functionalities
  • Low quiescent current at light load: 35 µA
  • Wide COUT and ESR range:
    • Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESR
  • Integrated protection features:
    • Reverse current protection
    • Reverse polarity protection
    • Overtemperature protection
    • Protection against output short-circuit to ground and supply
  • Available in two 5-pin SOT-23 packages:
    • Standard SOT-23 (DBV)
    • Thermally enhanced SOT-23 (DYB)

The TPS7B4255-Q1 is a low-dropout (LDO) voltage-tracking regulator, with high tracking accuracy and excellent load and line transient response. The device is available in two 5-pin, SOT-23 packages (DBV and DYB). The TPS7B4255-Q1 is designed to supply off-board sensors in automotive applications such as powertrain systems. Because the risk of failure in cables that deliver off-board power is high, the device comes with integrated protection features against fault conditions such as reverse current (short to battery), reverse polarity, output short to ground (current limit), and overtemperature (thermal shutdown). The device is designed to handle a 45-V (absolute maximum) input voltage and survive the automotive load dump transient conditions.

A reference voltage applied at the ADJ/EN pin is effectively tracked at the OUT pin with very tight tolerance for loads up to 70 mA. The TPS7B4255-Q1 can therefore deliver the power-supply voltage to the off-board sensors with high precision, which can help improve the reliability and accuracy of measurements made using ratiometric sensors.

By setting the ADJ/EN input pin low, the TPS7B4255-Q1 switches to standby mode and reduces the quiescent current of the LDO to less than 3.25 µA.

The TPS7B4255-Q1 is a low-dropout (LDO) voltage-tracking regulator, with high tracking accuracy and excellent load and line transient response. The device is available in two 5-pin, SOT-23 packages (DBV and DYB). The TPS7B4255-Q1 is designed to supply off-board sensors in automotive applications such as powertrain systems. Because the risk of failure in cables that deliver off-board power is high, the device comes with integrated protection features against fault conditions such as reverse current (short to battery), reverse polarity, output short to ground (current limit), and overtemperature (thermal shutdown). The device is designed to handle a 45-V (absolute maximum) input voltage and survive the automotive load dump transient conditions.

A reference voltage applied at the ADJ/EN pin is effectively tracked at the OUT pin with very tight tolerance for loads up to 70 mA. The TPS7B4255-Q1 can therefore deliver the power-supply voltage to the off-board sensors with high precision, which can help improve the reliability and accuracy of measurements made using ratiometric sensors.

By setting the ADJ/EN input pin low, the TPS7B4255-Q1 switches to standby mode and reduces the quiescent current of the LDO to less than 3.25 µA.
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類型 標題 日期
* Data sheet TPS7B4255-Q1 Automotive, 70-mA, 40-V, Voltage-Tracking LDO With 5-mV Tracking Tolerance datasheet (Rev. A) PDF | HTML 2023年 8月 23日
Product overview Robust Tracking LDOs for Powering Off Board Sensors PDF | HTML 2025年 10月 1日
Functional safety information TPS7B4255-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 2023年 2月 13日
Application brief Automotive Off-Board Sensor Power Considerations 2018年 9月 20日
More literature Fundamentals of designing with LDOs in auto battery direct connect applications 2017年 2月 27日
Application note Using Tracking LDOs as High-Side Switch (for Low-Current Applications) 2016年 10月 28日
EVM User's guide LDO Parallel Design Evaluation Module User's Guide 2016年 9月 14日
Application note Various Applications for Voltage-Tracking LDO 2016年 8月 3日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

TPS7B4255EVM-062 — 適用 70-mA、40-V 電壓追蹤低壓降 (LDO) 穩壓器的 TPS7B4255 評估模組

TPS7B4255EVM-062 評估模組 (EVM) 可用來評估 TPS7B4255-Q1 線性穩壓器的運作及性能，以在電路應用中使用。

此特定 EVM 配置包含適合汽車應用的 70-mA、高電壓、電壓追蹤、低壓降 (LDO) 穩壓器，以及適合超低寄生測量的板載負載暫態電路。該穩壓器可提供最高 70-mA 和 3-mV 追蹤公差，並具備高達 40 V 及 45 V 暫態的廣泛輸入電壓 (V IN) 範圍。為確保 TPS7B4255-Q1 的穩定性，請使用具小於 3-Ω 同等串聯電阻 (ESR) 的 1-µF (或更大) 輸出電容器。

使用指南: PDF | HTML
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模擬型號

TPS7B4255-Q1 PSpice Transient Model (Rev. A)

SBVM991A.ZIP (18 KB) - PSpice Model
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參考設計

TIDA-050071 — 車用離電池處理器電源參考設計，適用於 ADAS 與資訊娛樂系統

此車用離電池處理器電源參考設計提供多功能受保護的電源樹狀架構，可為常見的 ADAS 與資訊娛樂處理器 (如 TDA4x-Q1、AM6x-Q1) 供電。上述處理器可搭配感測融合系統、攝影機模組及域控制器運作。詳細設計指南協助工程師建立受保護的電源系統。提供額外電源軌以支援 DDR 記憶體與輔助負載。設計內建 MSPM0 微控制器 (MCU)，可用於設定電源軌電壓與時序。
Design guide: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
SOT-23 (DYB) 5 Ultra Librarian
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