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TPS7B81

ACTIVE

150-mA, off-battery (40-V), ultra-low-IQ, low-dropout (LDO) voltage regulator with enable

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Data sheet

TPS7B81

ACTIVE
Data sheet Order now

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 (µVrms) 450 Iq (typ) (mA) 0.0027 Thermal resistance θJA (°C/W) 63.9, 72.8 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 1.5 PSRR at 100 KHz (dB) 60 Dropout voltage (Vdo) (typ) (mV) 270 Operating temperature range (°C) -40 to 125
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 (µVrms) 450 Iq (typ) (mA) 0.0027 Thermal resistance θJA (°C/W) 63.9, 72.8 Rating Catalog Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable Accuracy (%) 1.5 PSRR at 100 KHz (dB) 60 Dropout voltage (Vdo) (typ) (mV) 270 Operating temperature range (°C) -40 to 125
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 WSON (DRV) 6 4 mm² 2 x 2
  • 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)

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

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

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.

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.

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Technical documentation

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* Data sheet TPS7B81 150-mA, 40-V, Ultra-Low-IQ, Low-Dropout Regulator datasheet PDF | HTML 23 Apr 2020
White paper Understanding the Foundations of Quiescent Current in Linear Power Systems 18 Feb 2021
EVM User's guide TPS7B81EVM-025 Evaluation Module User's Guide 15 Feb 2019

Design & development

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Evaluation board

TPS7B81EVM-025 — TPS7B81 150-mA, off-battery (40-V), ultra-low-IQ LDO voltage regulator evaluation module

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 (...)

User guide: PDF
Not available on TI.com
Reference designs

TIDA-010253 — Battery control unit reference design for energy storage systems

This reference design is a central controller for a high-voltage Lithium-ion (Li-ion), lithium iron phosphate (LiFePO4) battery rack. This design provides driving circuits for high-voltage relay, communication interfaces, (including RS-485, controller area network (CAN), daisy chain, and Ethernet), (...)
Design guide: PDF
Package Pins CAD symbols, footprints & 3D models
HVSSOP (DGN) 8 Ultra Librarian
WSON (DRV) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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