Automotive 300-mA, off-battery (40-V), adjustable voltage-tracking low-dropout voltage regulator



Product details


Output options Adjustable Output, Tracking Output Iout (Max) (A) 0.3 Vin (Max) (V) 40 Vin (Min) (V) 4 Vout (Max) (V) 40 Vout (Min) (V) 1.5 Iq (Typ) (mA) 0.04 Thermal resistance θJA (°C/W) 45 TI functional safety category Functional Safety-Capable Load capacitance (Min) (µF) 10 Rating Automotive Regulated outputs (#) 1 Features Enable, Reverse Current Protection, Reverse Voltage Protection, Short-to-Battery Protection PSRR @ 100 KHz (dB) 60 Dropout voltage (Vdo) (Typ) (mV) 350 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 HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 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 to 45-V Wide Input-Voltage Range (Maximum)
  • Output Voltage Adjusts Down to:
    • 1.5 to 40 V (HTSSOP)
    • 2 to 40 V (SO PowerPAD™)
  • 300-mA Output Current Capability
  • Very-Low Output Tracking Tolerance, ±4 mV
  • 320-mV Low Dropout Voltage when IOUT = 200 mA
  • Separate Pins for Enable and Tracking Inputs (HTSSOP only)
  • Low Quiescent Current (IQ):
    • < 4 µA when EN = LOW
    • 60 µA (Typical) at Light Loads
  • Extremely Wide ESR Range.
    • Stable With 10- to 500-µF Ceramic Output Capacitor, ESR 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
  • Available in the Following Packages:
    • 8-Pin SO PowerPAD Package
    • 20-Pin HTSSOP Package
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For automotive off-board sensors and small 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 consistent power supply as onboard components to secure high accuracy of data acquisition.

The TPS7B4253-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 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 reverse polarity condition. The TPS7B4253-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

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet TPS7B4253-Q1 300-mA 40-V Low-Dropout Voltage-Tracking LDO With 4-mV Tracking Tolerance datasheet (Rev. C) Jul. 22, 2016
Functional safety information TPS7B4253-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 17, 2019
Application note Automotive Off-Board Sensor Power Considerations Sep. 20, 2018
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
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
User guide LDO Parallel Design Evaluation Module User's Guide Sep. 14, 2016
Application note Various Applications for Voltage-Tracking LDO Aug. 03, 2016
Application note TPS7B4253-Q1 Pin FMEA Dec. 21, 2015
User guide TPS7B4253-Q1 Evaluation Module Dec. 11, 2014

Design & development

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

Hardware development

This LDO Parallel Solution evaluation modules (EVM) help designers evaluate the operation and performance of TPS7B4253-Q1 and TPS7B6750-Q1 parallel application. This EVM uses a very low-tolerance, voltagetracking LDO TPS7B4253-Q1 to demonstrate the
implementation of LDO parallel solution for high (...)
  • Expanded Output Current, Up to 900 mA
  • Good Thermal Performance Under Large Load Conditions
  • 4- to 40-V input voltage range


TPS7B4253 evaluation modules (EVM) help designers evaluate the operation and performance of TPS7B4253QPWPRQ1 tracking LDO. The TPS7B4253 is a monolithic integrated low dropout voltage tracker in HSOIC-DDA package. It is designed to supply off-board sensors in automotive environment. The IC has (...)


  • 300-mA output current
  • –40-V to 45-V wide maximum input voltage range
  • Very-low output tracking tolerance of 5 mV maximum
  • 350-mV low-dropout voltage when IOUT is 200 mA
  • 40-µA low quiescent current at light loads


Design tools & simulation

SLVMB36C.ZIP (89 KB) - PSpice Model
SLVMC48.ZIP (20 KB) - TINA-TI Spice Model
SLVMC49.TSC (163 KB) - TINA-TI Reference Design
SLVMC85.ZIP (3 KB) - PSpice Model

Reference designs

15-W System-Level Power Reference Design for Automotive Body Control Module
TIDA-00745 TIDA-00745 is a 14-W system-optimized (CISPR25 Class 4) SMPS design for an automotive body control module. All buck converters used in this design are switching at 2.1 MHz. 

The design is divided into four major blocks:

  1. EMI filter: Common mode and a differential filter for conducted EMI suppression
  2. (...)
document-generic Schematic
LDO Parallel Solution Reference Design with TPS7B4253-Q1
TIDA-00863 This TI design uses a very-low tolerance, voltage-tracking LDO TPS7B4253-Q1 to demonstrate the implementation of LDO parallel solution for high output current and low IQ requirements.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 20 View options
SO PowerPAD (DDA) 8 View options

Ordering & quality

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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring

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

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