Product details

Output options Adjustable Output, Tracking Output Iout (Max) (A) 0.07 Vin (Max) (V) 40 Vin (Min) (V) 3 Vout (Max) (V) 40 Vout (Min) (V) 2 Noise (uVrms) 150 Iq (Typ) (mA) 0.031 Thermal resistance θJA (°C/W) 127 TI functional safety category Functional Safety-Capable Rating Catalog 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 Adjustable Output, Tracking Output Iout (Max) (A) 0.07 Vin (Max) (V) 40 Vin (Min) (V) 3 Vout (Max) (V) 40 Vout (Min) (V) 2 Noise (uVrms) 150 Iq (Typ) (mA) 0.031 Thermal resistance θJA (°C/W) 127 TI functional safety category Functional Safety-Capable Rating Catalog 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
  • 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 voltage range (–40 V to +40 V):
    • Absolute maximum input range: –40 V to +45 V
  • Wide output voltage range: 2 V to 40 V
  • Very-tight, output-tracking tolerance: 5 mV (max)
  • Low dropout voltage: 500 mV (max) at 70 mA
  • Reverse polarity protection
  • Reverse current protection (short to battery)
  • Combined reference and enable input
  • Low quiescent current at light load: 35 µA
  • Extreme, wide ESR range:
    • Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESR
  • Overtemperature protection
  • Output short-circuit proof to ground and supply
  • Packages: 5-pin, SOT-23 DBV and 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 voltage range (–40 V to +40 V):
    • Absolute maximum input range: –40 V to +45 V
  • Wide output voltage range: 2 V to 40 V
  • Very-tight, output-tracking tolerance: 5 mV (max)
  • Low dropout voltage: 500 mV (max) at 70 mA
  • Reverse polarity protection
  • Reverse current protection (short to battery)
  • Combined reference and enable input
  • Low quiescent current at light load: 35 µA
  • Extreme, wide ESR range:
    • Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESR
  • Overtemperature protection
  • Output short-circuit proof to ground and supply
  • Packages: 5-pin, SOT-23 DBV and 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. The device provides integrated protection features such as reverse polarity, output short to battery and ground, and 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 maintain a 45-V (absolute maximum) input voltage to sustain the load dump transient conditions.

A reference voltage applied at the ADJ/EN pin effectively buffers the voltage with high accuracy for loads up to 70 mA. The high tracking accuracy provides accurate power supply to the off-board modules and enables better accuracy when measuring ratiometric sensors.

By setting the ADJ/EN input pin low, the TPS7B4255-Q1 switches to standby mode and reduces the quiescent current to the minimum value.

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. The device provides integrated protection features such as reverse polarity, output short to battery and ground, and 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 maintain a 45-V (absolute maximum) input voltage to sustain the load dump transient conditions.

A reference voltage applied at the ADJ/EN pin effectively buffers the voltage with high accuracy for loads up to 70 mA. The high tracking accuracy provides accurate power supply to the off-board modules and enables better accuracy when measuring ratiometric sensors.

By setting the ADJ/EN input pin low, the TPS7B4255-Q1 switches to standby mode and reduces the quiescent current to the minimum value.

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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 PDF | HTML 30 Jun 2022

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 (...)

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(DYB) 5 View options
SOT-23 (DBV) 5 View options

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