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TPS7B81-Q1

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

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Data sheet

TPS7B81-Q1

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) 2.5, 3.3, 5 Noise (µVrms) 450 Iq (typ) (mA) 0.0027 Thermal resistance θJA (°C/W) 31.1, 63.9, 72.8 TI functional safety category Functional Safety-Capable Rating Automotive 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 150
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) 2.5, 3.3, 5 Noise (µVrms) 450 Iq (typ) (mA) 0.0027 Thermal resistance θJA (°C/W) 31.1, 63.9, 72.8 TI functional safety category Functional Safety-Capable Rating Automotive 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 150
HVSSOP (DGN) 8 14.7 mm² 3 x 4.9 TO-252 (KVU) 5 66.726 mm² 6.6 x 10.11 WSON (DRV) 6 4 mm² 2 x 2
  • 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
  • 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

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.

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.
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Technical documentation

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Type Title Date
* Data sheet TPS7B81-Q1 150-mA, Off-Battery, Ultra-Low-IQ (3-μA), Low-Dropout Regulator datasheet (Rev. D) 30 Jun 2020
Functional safety information TPS7B81-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 21 Sep 2022
Functional safety information TPS7B81-Q1 Functional Safety FIT Rate and Failure Mode Distribution 17 Dec 2019
EVM User's guide TPS7B81EVM-025 Evaluation Module User's Guide 15 Feb 2019

Design & development

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Package Pins CAD symbols, footprints & 3D models
HVSSOP (DGN) 8 Ultra Librarian
TO-252 (KVU) 5 Ultra Librarian
WSON (DRV) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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