Home Power management Linear & low-dropout (LDO) regulators
Home
Power management
Linear & low-dropout (LDO) regulators

TPS7B4255-Q1

ACTIVE

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

Order now
Data sheet

TPS7B4255-Q1

ACTIVE
Data sheet Order now

Product details

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.
filter Find other Linear & low-dropout (LDO) regulators
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 7
Top documentation Type Title Format options Date
* 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
Product overview Robust Tracking LDOs for Powering Off Board Sensors PDF | HTML 01 Oct 2025
Functional safety information TPS7B4255-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 13 Feb 2023
Application brief Automotive Off-Board Sensor Power Considerations 20 Sep 2018
More literature Fundamentals of designing with LDOs in auto battery direct connect applications 27 Feb 2017
Application note Using Tracking LDOs as High-Side Switch (for Low-Current Applications) 28 Oct 2016
Application note Various Applications for Voltage-Tracking LDO 03 Aug 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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
Not available on TI.com
Simulation model

TPS7B4255-Q1 PSpice Transient Model (Rev. A)

SBVM991A.ZIP (18 KB) - PSpice Model
Download
Reference designs

TIDA-050071 — Off-battery processor power reference design for ADAS and infotainment applications

The automotive off-battery processor power reference design provides a versatile protected power tree for supplying common Advanced Driver Assistance Systems (ADAS) and infotainment processors, such as TDA4x-Q1 and AM6x-Q1. The processors described work with sensor fusion systems, camera modules (...)
Design guide: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 5 Ultra Librarian
SOT-23 (DYB) 5 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos