TPS7B82-Q1 Automotive 300-mA high-voltage ultra-low-IQ low-dropout (LDO) linear regulator |

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Automotive 300-mA high-voltage ultra-low-IQ low-dropout (LDO) linear regulator



In automotive battery-connected applications, low quiescent current (IQ) is important to save power and extend battery lifetime. It is especially necessary to have ultralow IQ for always-on systems.

The TPS7B82-Q1 is a low-dropout linear regulator designed to operate with a wide input-voltage range from 3 V to 40 V (45-V load dump protection). Operation down to 3 V allows the TPS7B82-Q1 to continue operating during cold-crank and start and stop conditions. With only 2.7-µA typical quiescent current at light load, this device is an optimal solution for powering microcontrollers (MCUs) and 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 uses a thermally conductive package to enable sustained operation despite significant dissipation across the device. Because of these features, the device is well suited as a power supply for various automotive applications.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C ≤ TA ≤ 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • Extended Junction Temperature Range:
    –40°C ≤ TJ ≤ 150°C
  • Low Quiescent Current IQ:
    • 300-nA Shutdown IQ
    • 2.7 µA Typical at Light Loads
    • 5 µA Maximum at Light Loads
  • 3-V to 40-V Wide VIN Input Voltage Range With up to 45-V Transient
  • Maximum Output Current: 300 mA
  • 2% Output-Voltage Accuracy
  • Maximum Dropout Voltage: 700 mV at 200-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 and 3.3-V Output Voltage
  • Thermal Resistance (RθJA): 63.9°C/W
  • Packages:
    • 8-Pin HVSSOP, RθJA = 63.9°C/W
    • 6-Pin WSON, RθJA = 72.8°C/W
    • 5-Pin TO-252, RθJA = 38.8°C/W

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Thermal calculator

Estimate the LDO IC temperature at your design conditions:
Part number
Vin  V
Vout  V
Iout  A
Ambient temp  °C
Package option
Voltage option
PCB construction
Enhanced Thermal = single thermal spreading plane of 1 oz Cu
Minimum Thermal = single thermal spreading plane of 1/2 oz Cu
View the user guide for more details.

Junction temperature vs. PCB copper coverage area
These are estimated power dissipation and thermal results.
Care must be taken to ensure that device junction temperature
does not exeed the maximum ratings as indicated in the datasheet.

This calculator uses the PCB copper area to estimate the device junction temperature. See notes on usage and calculation method.


Compare all products in Linear regulators (LDO) Email Download to Excel
Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Fixed output options (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Noise (uVrms) Approx. price (US$) Rating PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7B82-Q1 Order now Fixed Output     0.3     40     3     5     3.3     3.3
TO-252 | 5
WSON | 6    
Enable     1     -40 to 150     59     450     0.65 | 1ku     Automotive     25     2     400     0.003     8HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 8)
5TO-252: 67 mm2: 10.11 x 6.6 (TO-252 | 5)
6WSON: 4 mm2: 2 x 2 (WSON | 6)    
TPS7A66-Q1 Order now Adjustable Output
Fixed Output    
0.15     40     4     5.5     1.5     3.3
HVSSOP | 8     Enable
Power Good    
1     -40 to 125     63       0.60 | 1ku     Automotive     40     2     300     0.012     8HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 8)    
TPS7A6650H-Q1 Order now Fixed Output     0.05     40     4     5     5     5     HVSSOP | 8     Enable
Power Good
Soft Start    
1     -40 to 150     63       1.40 | 1ku     Automotive     50     2     130     0.012     8HVSSOP: 15 mm2: 4.9 x 3 (HVSSOP | 8)    
TPS7A69-Q1 Order now Fixed Output     0.15     40     4     5     3.3