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



Product details


Output options Adjustable Output, Tracking Output Iout (Max) (A) 0.15 Vin (Max) (V) 40 Vin (Min) (V) 4 Vout (Max) (V) 40 Vout (Min) (V) 2 Iq (Typ) (mA) 0.06 Thermal resistance θJA (°C/W) 45 Load capacitance (Min) (µF) 10 Rating Automotive Regulated outputs (#) 1 Features Reverse Current Protection, Reverse Voltage Protection, Short-to-Battery Protection PSRR @ 100 KHz (dB) 43 Dropout voltage (Vdo) (Typ) (mV) 160 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other Linear regulators (LDO)


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 3A
    • Device CDM ESD Classification Level C6
  • –40-V to 45-V Wide Input-Voltage Range (Maximum)
  • Output-Voltage Adjust Range: 2 V to 40 V
  • 150-mA Output Current Capability
  • Very Low Output-Tracking Tolerance, ±4 mV
  • 160-mV Low-Dropout Voltage When IOUT = 100 mA
  • Low Quiescent Current (I(Q)):
    • < 4 µA When ADJ = LOW
    • 60 µA Typical at Light Load
  • Extremely Wide ESR Range
    • 10-µF to 500-µF Ceramic Output Capacitor
    • ESR Range from 1 mΩ to 20 Ω
  • Reverse Polarity Protection
  • Current-Limit and Thermal-Shutdown Protection
  • Output Short-Circuit-Proof to Ground and Supply
  • Inductive Clamp at OUT Pin
  • 8-Pin SO PowerPAD Package With Exposed Thermal Pad
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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 device is designed for automotive applications with a 45-V 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 4-mV ultralow 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 device 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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Type Title Date
* Data sheet TPS7B4254-Q1 150-mA 40-V Voltage-Tracking LDO With 4-mV Tracking Tolerance datasheet (Rev. B) Jul. 19, 2016
Technical article What’s not in the power MOSFET data sheet part 2: voltage-dependent leakage currents Jul. 23, 2021
Application note TPS7B4254-Q1 Functional Safety Failure In Time (FIT) Rates Mar. 25, 2020
Application note Automotive Off-Board Sensor Power Considerations Sep. 20, 2018
Technical article LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical article LDO Basics: Preventing reverse current Jul. 25, 2018
Technical article LDO basics: introduction to quiescent current Jun. 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) Oct. 28, 2016
Application note Various Applications for Voltage-Tracking LDO Aug. 03, 2016
User guide TPS7B4254-Q1 Evaluation Module User's Guide Jun. 27, 2016

Design & development

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Hardware development

document-generic User guide
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 (...)
  • Very low output voltage tracking tolerance, max 4mV
  • -40V to 50V wide maximum input input voltage range
  • 150mA output current
  • 160mV low dropout voltage when IOUT=100mA

Design tools & simulation

SLVMBJ6A.ZIP (96 KB) - PSpice Model
SLVMBR5A.TSC (45 KB) - TINA-TI Reference Design
SLVMBR8A.ZIP (18 KB) - TINA-TI Spice Model
SLVMC86.ZIP (3 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

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