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) 63.9 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Enable Accuracy (%) 1.5 PSRR @ 100 KHz (dB) 55 Dropout voltage (Vdo) (Typ) (mV) 270 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

HVSSOP (DGN) 8 9 mm² 3 x 3 WSON (DRV) 6 4 mm² 2 x 2 open-in-new Find other Linear regulators (LDO)


  • Wide input voltage range: 3 V to 40 V
  • Output current: 150 mA
  • Ultra-low quiescent current (IQ):
    • 2.7 µA typical at light loads
    • 4.5 µA maximum at light loads
  • Accuracy: 1.5% over line, load, and temperature
  • Typical dropout voltage: 180 mV at 100 mA
  • Wide enable voltage range: 2 V to VIN (40 V max)
  • Input voltage transient tolerance: 45 V
  • Fixed 5-V and 3.3-V output options
  • Current limit and thermal shutdown protection
  • Stable with a wide range of capacitors (1 µF to 200 µF)(1)
  • Junction temperature range: –40°C to +150°C
  • High thermal performance packages:
    • DGN (8-pin HVSSOP), RθJA = 63.9°C/W
    • DRV (6-pin WSON), RθJA = 72.8°C/W


(1)See the output capacitor requirements in the Recomended Operation Conditions table

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


The TPS7B81 is a low-dropout (LDO) linear regulator that operates from input voltages up to 40 V and can supply up to 150 mA in current. With only 2.7 µA of quiescent current at light loads, the device is an excellent choice for wide input supply designs and high cell count battery applications that need very low standby power consumption. The 45-V transient tolerance provides additional headroom for applications where inductive kickback may be present, thereby reducing external circuitry for voltage suppression.

With integrated short-circuit and overcurrent limiting, the TPS7B81 protects the system during fault conditions. In addition to the low standby power consumption, the very low dropout voltage in light load conditions helps maintain regulation even when powered by depleted batteries.

The TPS7B81 is available in thermally enhanced, 8-pin HVSSOP and 6-pin WSON packages. Both packages offer high thermal conductivity, and their small size supports compact design, making them well suited for space-limited applications such as power tools or motor drive modules and battery packs.

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

Technical documentation

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Type Title Date
* Data sheet TPS7B81 150-mA, 40-V, Ultra-Low-IQ, Low-Dropout Regulator datasheet Apr. 23, 2020
White paper Understanding the Foundations of Quiescent Current in Linear Power Systems Feb. 18, 2021
User guide TPS7B81EVM-025 Evaluation Module User's Guide Feb. 15, 2019
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
Technical article LDO basics: noise – part 1 Jun. 14, 2017

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 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

CAD/CAE symbols

Package Pins Download
HVSSOP (DGN) 8 View options
WSON (DRV) 6 View options

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