Automotive 50-mA, off-battery (40-V), adjustable voltage-tracking low-dropout voltage regulator



Product details


Output options Adjustable Output, Tracking Output Iout (Max) (A) 0.05 Vin (Max) (V) 40 Vin (Min) (V) 4 Vout (Max) (V) 18 Vout (Min) (V) 1.5 Iq (Typ) (mA) 0.04 Thermal resistance θJA (°C/W) 172 TI functional safety category Functional Safety-Capable Load capacitance (Min) (µF) 1 Rating Automotive Regulated outputs (#) 1 Features Reverse Current Protection, Reverse Voltage Protection, Short-to-Battery Protection PSRR @ 100 KHz (dB) 60 Dropout voltage (Vdo) (Typ) (mV) 250 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 SOT-23 (DBV) 5 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
  • –20-V to 45-V Wide, Maximum Input Voltage Range
  • Output Current, 50 mA
  • Very-Low Output-Tracking Tolerance,
    5 mV (max)
  • 150-mV Low Dropout Voltage When
    IOUT = 10 mA
  • Combined Reference and Enable Input
  • 40-µA Low Quiescent Current at Light Load
  • Extreme, Wide ESR Range.
    • Stable with 1-µF to 50-µF Ceramic Output Capacitor, ESR 1 mΩ to 20 Ω
  • Reverse Polarity Protection
  • Overtemperature Protection
  • Output Short-Circuit Proof to Ground and Supply
  • SOT-23 Package

All trademarks are the property of their respective owners.

open-in-new Find other Linear regulators (LDO)


The TPS7B4250-Q1 device is a monolithic, integrated low-dropout voltage tracker. The device is available in a SOT-23 package. The TPS7B4250-Q1 device is designed to supply off-board sensors in an automotive environment. The IC has integrated protection for overload, over temperature, reverse polarity, and output short-circuit to the battery and ground.

A reference voltage applied at the adjust-input pin, ADJ, regulates supply voltages up to VIN = 45 V with high accuracy and loads up to 50 mA.

By setting the adjust/enable input pin, ADJ/EN, to low, the TPS7B4250-Q1 device switches to standby mode which reduces the quiescent current to the minimum value.

For all available packages, see the orderable addendum at the end of the data sheet.
open-in-new Find other Linear regulators (LDO)

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 14
Type Title Date
* Datasheet TPS7B4250-Q1 50-mA 40-V Voltage-Tracking LDO With 5-mV Tracking Tolerance datasheet (Rev. C) Sep. 28, 2016
Functional safety information TPS7B4250-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 Short-Circuit Reliability Test for TPS7B4250-Q1 Nov. 16, 2016
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
Application note TPS7B4250-Q1 Pin FMEA Sep. 23, 2015
More literature LDO Family Flyer Jul. 11, 2014
User guide TPS7B4250 Evaluation Module Oct. 17, 2013

Design & development

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

Hardware development


The TPS7B4250 is a monolithic integrated low dropout voltage tracker in SOT-23 package. It is designed to supply off-board sensors in automotive environment. The IC has integrated protection for overload, over temperature, reverse polarity as well as output short circuit to battery and ground

Supply (...)

  • 50mA Output current
  •  -20V to 45V wide maximum input voltage range
  •  Very low output tracking tolerance, max 5mV
  •  150mV low dropout voltage when Iout=10mA
  •  40uA low quiescent current at light load

Design tools & simulation

SLVM976.ZIP (20 KB) - PSpice Model
SLVMC72.ZIP (7 KB) - TINA-TI Spice Model
SLVMC73.TSC (502 KB) - TINA-TI Reference Design
SLVMC87.ZIP (1 KB) - PSpice Model

Reference designs

65W Active clamp flyback with Si FETs reference design for a high power density 5-20V AC/DC adapter
PMP21479 — This reference design uses the UCC28780 active clamp flyback controller to generate a 20-V/15-V/9-V/5-V adjustable output voltage. The maximum power rating is 65 W at 20-V output and up to 3 A at all other output voltage settings. This design reaches a peak efficiency of over 93% using silicon FETs (...)
document-generic Schematic
65-W USB Type-C ZVS-flyback reference design
PMP21552 — This reference design is a low-cost, high-density USB adapter that uses the UCC28780 active-clamp flyback controller and UCC5304 isolated driver in a ZVS-flyback topology. The maximum power rating is 65 W at 20-V output but is adjustable for 20-V/15-V/9-V/5-V output voltage and 3 A.  This (...)
document-generic Schematic
Automotive HVAC control reference design with HMI
TIDA-020010 — This reference design offers a cost-effective solution for a heating, ventilation, and air conditioning (HVAC) human-machine interface (HMI) application. This reference design incorporates a synchronous step-down converter, multiple channel half-bridge motor driver for brushed DC motors (BDC (...)
document-generic Schematic
22-W/in3, 93.1% peak efficiency, 100-W USB-PD 3.0 AC/DC adapter reference design with Si MOSFET
TIDA-010047 — This fully-tested reference design is a high-efficiency, high-power-density, AC/DC adapter solution with a wide input voltage range (100- to 240-V AC) for laptop adapters and smartphone charger applications. This design consists of a front-end transition-mode (TM) power factor correction (PFC (...)
document-generic Schematic
Automotive Radio USB Power Port (5V@2.1A) and LED Backlight Driver Reference Design
PMP11136 — The PMP11136 reference design supplies cable drop compensated USB outputs of 5V @ 2.1A and 5V @ 1A. Additionally, there is a buck converter output of 3.3V @ 2.5A and a 12V @ 0.163A current regulated LED boost converter.
document-generic Schematic
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

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 5 View options

Ordering & quality

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

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. ​​​​​​​​​​​​​​


Related videos