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TPS3850-Q1

ACTIVE

Automotive, window supervisor for OV & UV monitoring with window watchdog timer & programmable delay

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Data sheet

TPS3850-Q1

ACTIVE
Data sheet Order now

Product details

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.4, 0.864, 0.9, 0.936, 1.116, 1.152, 1.248, 1.284, 1.674, 1.8, 1.926, 2.325, 2.4, 2.6, 2.675, 3, 3.069, 3.168, 3.432, 3.531, 4.65, 5 Features Reset time delay, Separate VDD & sense, Timeout watchdog, Undervoltage and overvoltage monitor, Watchdog disable, Watchdog timer, Window watchdog Reset threshold accuracy (%) 1 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Open-drain Time delay (ms) 10, 200 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.4, 0.864, 0.9, 0.936, 1.116, 1.152, 1.248, 1.284, 1.674, 1.8, 1.926, 2.325, 2.4, 2.6, 2.675, 3, 3.069, 3.168, 3.432, 3.531, 4.65, 5 Features Reset time delay, Separate VDD & sense, Timeout watchdog, Undervoltage and overvoltage monitor, Watchdog disable, Watchdog timer, Window watchdog Reset threshold accuracy (%) 1 Iq (typ) (mA) 0.01 Output driver type/reset output Active-low, Open-drain Time delay (ms) 10, 200 Supply voltage (min) (V) 1.6 Supply voltage (max) (V) 6.5 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
VSON (DRC) 10 9 mm² 3 x 3
  • AEC-Q100 Qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-capable
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy (Maximum)
  • Low supply current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • User-programmable reset delay
  • Factory programmed precision watchdog and reset timers
  • Open-drain outputs
  • Precision over- and undervoltage monitoring:
    • Supports common rails from 0.9 V to 5.0 V
    • 4% and 7% Fault windows available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 10-Pin VSON package
  • AEC-Q100 Qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C4B
  • Functional Safety-capable
  • Input voltage range: VDD = 1.6 V to 6.5 V
  • 0.8% Voltage threshold accuracy (Maximum)
  • Low supply current: IDD = 10 µA (typical)
  • User-programmable watchdog timeout
  • User-programmable reset delay
  • Factory programmed precision watchdog and reset timers
  • Open-drain outputs
  • Precision over- and undervoltage monitoring:
    • Supports common rails from 0.9 V to 5.0 V
    • 4% and 7% Fault windows available
    • 0.5% Hysteresis
  • Watchdog disable feature
  • Available in a small 3-mm × 3-mm, 10-Pin VSON package

The TPS3850-Q1 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850-Q1 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds on the SENSE pin. The TPS3850-Q1 also includes accurate hysteresis on both thresholds, making the device ideal for use with tight tolerance systems. The supervisor RESET delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The factory-programmed RESET delay features a 9.5% accuracy, high-precision delay timing.

The TPS3850-Q1 includes a programmable window watchdog timer for a wide variety of applications. The dedicated watchdog output ( WDO) enables increased resolution to help determine the nature of fault conditions. The window watchdog timeouts can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3850-Q1 is available in a small 3.00-mm × 3.00-mm, 10-pin VSON package. The TPS3850-Q1 features wettable flanks for easy optical inspection.

The TPS3850-Q1 combines a precision voltage supervisor with a programmable window watchdog timer. The TPS3850-Q1 window comparator achieves 0.8% accuracy (–40°C to +125°C) for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds on the SENSE pin. The TPS3850-Q1 also includes accurate hysteresis on both thresholds, making the device ideal for use with tight tolerance systems. The supervisor RESET delay can be set by factory-programmed default delay settings, or programmed by an external capacitor. The factory-programmed RESET delay features a 9.5% accuracy, high-precision delay timing.

The TPS3850-Q1 includes a programmable window watchdog timer for a wide variety of applications. The dedicated watchdog output ( WDO) enables increased resolution to help determine the nature of fault conditions. The window watchdog timeouts can be set by factory-programmed default delay settings, or programmed by an external capacitor. The watchdog can be disabled via logic pins to avoid undesired watchdog timeouts during the development process.

The TPS3850-Q1 is available in a small 3.00-mm × 3.00-mm, 10-pin VSON package. The TPS3850-Q1 features wettable flanks for easy optical inspection.
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Type Title Date
* Data sheet TPS3850-Q1 Precision Voltage Supervisor with Programmable Window Watchdog Timer datasheet (Rev. B) PDF | HTML 20 May 2021
White paper Designing a Power Supply for a Safety MCU to Meet Functional Safety ASIL B PDF | HTML 15 Nov 2023
Functional safety information TPS3850-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 17 May 2021
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Technical article How voltage references and supervisors help achieve ASIL functional safety goals PDF | HTML 10 May 2019
Technical article How diagnostics help your ADAS design achieve higher levels of functional safety PDF | HTML 06 May 2019

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