Product details


Output options Fixed Output Iout (Max) (A) 0.15 Vin (Max) (V) 40 Vin (Min) (V) 3 Vout (Max) (V) 5 Vout (Min) (V) 3.3 Fixed output options (V) 3.3, 5 Noise (uVrms) 450 Iq (Typ) (mA) 0.0027 Thermal resistance θJA (°C/W) 59 TI functional safety category Functional Safety-Capable Load capacitance (Min) (µF) 1 Rating Automotive Regulated outputs (#) 1 Features Enable Accuracy (%) 1.5 PSRR @ 100 KHz (dB) 25 Dropout voltage (Vdo) (Typ) (mV) 400 Operating temperature range (C) -40 to 150 open-in-new Find other Linear & low-dropout (LDO) regulators

Package | Pins | Size

HVSSOP (DGN) 8 9 mm² 3 x 3 TO-252 (KVU) 5 67 mm² 6.6 x 10.11 WSON (DRV) 6 4 mm² 2 x 2 open-in-new Find other Linear & low-dropout (LDO) regulators


  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to 125°C, TA
  • Device junction temperature range: –40°C to 150°C
  • 3-V to 40-V wide VIN input voltage range with up to 45-V transient
  • Maximum output current: 150 mA
  • Low quiescent current IQ:
    • 300 nA typical when EN = low (shutdown mode)
    • 2.7 µA typical at light loads
    • 4.5 µA maximum at light loads
  • 1.5% output-voltage accuracy over line, load and temperature
  • Maximum dropout voltage: 540 mV at 150-mA load current for fixed 5-V output version
  • Stable with low-ESR (0.001-Ω to 5-Ω) ceramic output-stability capacitor (1 µF to 200 µF)
  • Fixed 5-V, 3.3-V and 2.5-V output voltage
  • Integrated fault protection:
    • Thermal shutdown
    • Short-circuit and overcurrent protection
  • Packages:
    • DGN (8-pin HVSSOP), RθJA = 63.9°C/W
    • DRV (6-pin WSON), RθJA = 72.8°C/W
    • KVU (5-pin TO-252), RθJA = 38.8°C/W
open-in-new Find other Linear & low-dropout (LDO) regulators


In automotive battery-connected applications, low quiescent current (IQ) is important to conserve energy and to extend battery lifetime. Always-on systems must have ultralow IQ over an extended temperature range to enable sustained operation when the vehicle ignition is off.

The TPS7B81-Q1 is a low-dropout (LDO) linear regulator designed for up to 40-V VIN applications. With only a 2.7-µA typical quiescent current at light load, the device is an optimal solution for powering microcontrollers and controller area network and local interconnect network (CAN/LIN) transceivers in standby systems.

The device features integrated short-circuit and overcurrent protection. This device operates in ambient temperatures from –40°C to +125°C and with junction temperatures from –40°C to +150°C. Additionally, this device is available in several packages of varying size and thermal conductivity. The small WSON package facilitates the most compact PCB design and the TO-252 package enables sustained operation despite significant dissipation across the device. These features make the device well suited as a power supply for various battery-connected automotive applications.

open-in-new Find other Linear & low-dropout (LDO) regulators

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 3
Type Title Date
* Data sheet TPS7B81-Q1 150-mA, Off-Battery, Ultra-Low-IQ (3-μA), Low-Dropout Regulator datasheet (Rev. D) Jun. 30, 2020
Functional safety information TPS7B81-Q1 Functional Safety FIT Rate and Failure Mode Distribution Dec. 17, 2019
User guide TPS7B81EVM-025 Evaluation Module User's Guide Feb. 15, 2019

Design & development

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

Hardware development

document-generic User guide
The BQ25170EVM is designed to help the user evaluate and test the various operating modes of the BQ25170 device. The user’s guide includes setup instructions for the hardware, a schematic diagram, a bill of materials (BOM), and PCB layout drawings for the evaluation module. 
  • Complete solution for evaluation of the small form factor linear charger capable of providing up to 800 mA to a single li-ion or LiFePO4 battery
  • Popular configuration can be selected using the switches
  • Adjustments for charge current over a wide range along with TS sensing
document-generic User guide

The TPS7B81EVM-025 evaluation module (EVM) is designed for a typical configuration to evaluate the operation and performance of the TPS7B81, which is a 150-mA, high-voltage, ultra-low-IQ, low-dropout (LDO) linear regulator.

The EVM circuit board is configured to be a reference design for engineering (...)

  • Supports input voltages from 3 V to 40 V
  • Low quiescent current (IQ): 5 µA (typ)
  • Dropout voltage (max): 525 mV at 150 mA
  • Device operating junction temperature range: -40ºC to 150ºC
  • Integrated fault protection
document-generic User guide

The TPS7B8250EVM evaluation module (EVM) lets you evaluate the operation and performance of the TPS7B82-Q1 device. The TPS7B82-Q1 device is a low-dropout (LDO) linear regulator designed for up to 40-V VIN with a 300-mA (maximum) output current. With only 2.7-μA typical quiescent current at (...)

  • Wide input voltage (VIN) range from 3 V to 40 V, with up to 45-V transient
  • Maximum output current of 300 mA
  • Low quiescent current

Design tools & simulation

SBVM946.ZIP (45 KB) - IBIS Model
SLVMC70.ZIP (2 KB) - PSpice Model
SLVMC71.ZIP (58 KB) - PSpice Model
SLVMCR0.ZIP (2 KB) - PSpice Model
SLVMCR1.ZIP (60 KB) - PSpice Model

Reference designs

参考设计 Download
Automotive 12-V to 24-V engine load interface reference design
TIDA-060030 This reference design is a 3-phase 1/2 H-Bridge Motor Drive solution with independent FET capability that interfaces with solenoid loads found in Gasoline and Diesel Engine Platforms such as automotive solenoids, bidirectional Brushed- or Brushless-DC motors, unidirectional Brushed-DC motors, and (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
HVSSOP (DGN) 8 View options
TO-252 (KVU) 5 View options
WSON (DRV) 6 View options

Ordering & quality

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

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. ​​​​​​​​​​​​​​