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TPS7B4254-Q1

ACTIVE

Automotive 150-mA, off-battery (40-V), adjustable voltage-tracking low-dropout voltage regulator

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TPS7B4258-Q1 ACTIVE Automotive, 150mA 40V voltage-tracking low-dropout regulator with feedback Improved line/load transient, Lower quiescent current and faster response time.

TPS7B4254-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Vin (max) (V) 40 Vin (min) (V) 4 Iout (max) (A) 0.15 Output options Tracking Output Vout (max) (V) 40 Vout (min) (V) 2 PSRR at 100 KHz (dB) 43 Iq (typ) (mA) 0.06 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection Thermal resistance θJA (°C/W) 45 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Dropout voltage (Vdo) (typ) (mV) 160 Operating temperature range (°C) -40 to 125
Rating Automotive Vin (max) (V) 40 Vin (min) (V) 4 Iout (max) (A) 0.15 Output options Tracking Output Vout (max) (V) 40 Vout (min) (V) 2 PSRR at 100 KHz (dB) 43 Iq (typ) (mA) 0.06 Features Reverse Current Protection, Reverse voltage protection, Short-to-battery protection Thermal resistance θJA (°C/W) 45 Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Dropout voltage (Vdo) (typ) (mV) 160 Operating temperature range (°C) -40 to 125
HSOIC (DDA) 8 29.4 mm² (4.9 mm × 6 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • Device HBM ESD classification level 3A
    • Device CDM ESD classification level C6
  • Wide input voltage range: –40V to 45V (max)
  • Output voltage adjust range: 2V to 40V
  • Output current capability: 150mA
  • Very low output-tracking tolerance: ±4mV
  • Low-dropout voltage: 160mV for IOUT = 100mA
  • Low quiescent current (I(Q)):
    • < 4µA when ADJ = low
    • 60µA typical at light load
  • Extremely wide ESR range:
    • 10µF to 500µF ceramic output capacitor
    • ESR range from 1mΩ to 20Ω
  • Reverse polarity protection
  • Current-limit and thermal-shutdown protection
  • Output short-circuit-proof to ground and supply
  • Inductive clamp at OUT pin
  • 8-pin HSOIC PowerPAD™ package with exposed thermal pad
  • For a newer drop-in alternative in the HSOIC package, see the TPS7B4258-Q1 device.
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
    • Device HBM ESD classification level 3A
    • Device CDM ESD classification level C6
  • Wide input voltage range: –40V to 45V (max)
  • Output voltage adjust range: 2V to 40V
  • Output current capability: 150mA
  • Very low output-tracking tolerance: ±4mV
  • Low-dropout voltage: 160mV for IOUT = 100mA
  • Low quiescent current (I(Q)):
    • < 4µA when ADJ = low
    • 60µA typical at light load
  • Extremely wide ESR range:
    • 10µF to 500µF ceramic output capacitor
    • ESR range from 1mΩ to 20Ω
  • Reverse polarity protection
  • Current-limit and thermal-shutdown protection
  • Output short-circuit-proof to ground and supply
  • Inductive clamp at OUT pin
  • 8-pin HSOIC PowerPAD™ package with exposed thermal pad
  • For a newer drop-in alternative in the HSOIC package, see the TPS7B4258-Q1 device.

For automotive off-board sensors and low-current off-board modules, the power supply is through a long cable from the main board. In such cases, protection is required in the power devices for the off-board loads to prevent the onboard components from damage during a short to GND or short to battery caused by a broken cable. Off-board sensors require a power supply as consistent as that for onboard components to secure high accuracy of data acquisition.

The TPS7B4254-Q1 is designed for automotive applications with a 45V load dump. The device can either be used as one tracking low-dropout (LDO) regulator or as a voltage tracker to build one closed power loop for off-board sensors with an onboard main supply. The output of the device is accurately regulated by a reference voltage at the ADJ pin.

To provide an accurate power supply to the off-board modules, the device offers a 4mV ultra-low tracking tolerance between the ADJ and FB pins across temperature. The back-to-back PMOS topology eliminates the need for an external diode under a reverse-polarity condition. The TPS7B4254-Q1 also includes thermal shutdown, inductive clamp, overload, and short-to-battery protection to prevent damage to onboard components during extreme conditions.

For automotive off-board sensors and low-current off-board modules, the power supply is through a long cable from the main board. In such cases, protection is required in the power devices for the off-board loads to prevent the onboard components from damage during a short to GND or short to battery caused by a broken cable. Off-board sensors require a power supply as consistent as that for onboard components to secure high accuracy of data acquisition.

The TPS7B4254-Q1 is designed for automotive applications with a 45V load dump. The device can either be used as one tracking low-dropout (LDO) regulator or as a voltage tracker to build one closed power loop for off-board sensors with an onboard main supply. The output of the device is accurately regulated by a reference voltage at the ADJ pin.

To provide an accurate power supply to the off-board modules, the device offers a 4mV ultra-low tracking tolerance between the ADJ and FB pins across temperature. The back-to-back PMOS topology eliminates the need for an external diode under a reverse-polarity condition. The TPS7B4254-Q1 also includes thermal shutdown, inductive clamp, overload, and short-to-battery protection to prevent damage to onboard components during extreme conditions.
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Technical documentation

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* Data sheet TPS7B4254-Q1 Automotive, 150mA, 40V, Voltage-Tracking LDO With 4mV Tracking Tolerance datasheet (Rev. C) PDF | HTML Nov 4, 2025
Product overview Robust Tracking LDOs for Powering Off Board Sensors PDF | HTML Oct 1, 2025
Functional safety information TPS7B4254-Q1 Functional Safety FIT Rate, FMD and Pin FMA (Rev. A) PDF | HTML Apr 28, 2023
Application brief Automotive Off-Board Sensor Power Considerations Sep 20, 2018
More literature Fundamentals of designing with LDOs in auto battery direct connect applications Feb 27, 2017
Application note Using Tracking LDOs as High-Side Switch (for Low-Current Applications) PDF | HTML Oct 28, 2016
Application note Various Applications for Voltage-Tracking LDO Aug 3, 2016

Design & development

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Evaluation board

TPS7B4254EVM — TPS7B4254-Q1 Voltage-Tracking LDO Regulator Evaluation Module

TPS7B4254-Q1 evaluation modules (EVM) help designers evaluate the operation and performance of TPS7B4254QDDARQ1 voltage-tracking LDO. The TPS7B4254-Q1 is a monolithic integrated low dropout voltage tracker in HSOIC-DDA package. It is designed to supply off-board sensors in automotive environment. (...)
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Simulation model

TPS7B4254 PSpice Transient Model (Rev. A)

SLVMBJ6A.ZIP (96 KB) - PSpice model
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Simulation model

TPS7B4254-Q1 TINA-TI Transient Reference Design (Rev. A)

SLVMBR5A.TSC (45 KB) - TINA-TI reference design
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TPS7B4254-Q1 TINA-TI Transient Spice Model (Rev. A)

SLVMBR8A.ZIP (18 KB) - TINA-TI Spice model
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Simulation model

TPS7B4254-Q1 Unencrypted PSpice Transient Model

SLVMC86.ZIP (3 KB) - PSpice model
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