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TPS7B4255-Q1

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Automotive, 70-mA 40-V voltage-tracking low-dropout (LDO) regulator with 5-mV tracking tolerance

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Data sheet

TPS7B4255-Q1

ACTIVE
Data sheet Order now

Product details

Output options Tracking Output Iout (max) (A) 0.07 Vin (max) (V) 40 Vin (min) (V) 3 Vout (max) (V) 40 Vout (min) (V) 2 Rating Automotive Noise (µVrms) 150 Iq (typ) (mA) 0.031 Thermal resistance θJA (°C/W) 127, 176 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection 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) 40 Vout (min) (V) 2 Rating Automotive Noise (µVrms) 150 Iq (typ) (mA) 0.031 Thermal resistance θJA (°C/W) 127, 176 TI functional safety category Functional Safety-Capable Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection 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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Technical documentation

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* Data sheet TPS7B4255-Q1 Automotive, 70-mA, 40-V, Voltage-Tracking LDO With 5-mV Tracking Tolerance datasheet (Rev. A) PDF | HTML 23 Aug 2023
Functional safety information TPS7B4255-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 13 Feb 2023

Design & development

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Evaluation board

TPS7B4255EVM-062 — TPS7B4255 evaluation module for 70-mA 40-V voltage-tracking low-dropout (LDO) regulator

TPS7B4255EVM-062 evaluation module (EVM) is used to evaluate the operation and performance of the TPS7B4255-Q1 linear regulator for use in circuit applications.

This particular EVM configuration contains a 70-mA, high-voltage, voltage-tracking, low-dropout (LDO) regulator for automotive (...)

User guide: PDF | HTML
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Simulation model

TPS7B4255-Q1 PSpice Transient Model (Rev. A)

SBVM991A.ZIP (18 KB) - PSpice Model
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Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 5 Ultra Librarian
SOT-23 (DYB) 5 Ultra Librarian
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