Product details

Number of supplies monitored 1, 2 Threshold voltage 1 (Typ) (V) 0.8 Features Detection time delay, Manual reset capable, Reset time delay, Separate VDD & sense, Undervoltage and overvoltage monitor, Wide input voltage Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-high, Active-low, Open-drain, Push-pull Time delay (ms) Programmable TI functional safety category Functional Safety-Capable Rating Catalog Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125
Number of supplies monitored 1, 2 Threshold voltage 1 (Typ) (V) 0.8 Features Detection time delay, Manual reset capable, Reset time delay, Separate VDD & sense, Undervoltage and overvoltage monitor, Wide input voltage Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-high, Active-low, Open-drain, Push-pull Time delay (ms) Programmable TI functional safety category Functional Safety-Capable Rating Catalog Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125
WSON (DSK) 10 6 mm² 2.5 x 2.5
  • Wide supply voltage range: 2.7 V to 65 V
  • SENSE and RESET pins are 65 V graded
  • Low quiescent current: 1 µA (typical)
  • Flexible and wide voltage threshold options Table 13-1
    • 2.7 V to 36 V (1.5% maximum accuracy)
    • 800 mV option (1% maximum accuracy)
  • Built-in hysteresis (VHYS)
    • Percentage options: 2% to 13% (1% steps)
    • Fixed options: VTH < 8 V = 0.5 V, 1 V, 1.5 V, 2 V, 2.5 V
  • Programmable reset time delay
    • 10 nF = 12.8 ms, 10 µF = 12.8 s
  • Programmable sense time delay
    • 10 nF = 1.28 ms, 10 µF = 1.28 s
  • Manual Reset (MR) feature
  • Output reset latching feature
  • Output topology: Open-Drain or Push-Pull
  • Wide supply voltage range: 2.7 V to 65 V
  • SENSE and RESET pins are 65 V graded
  • Low quiescent current: 1 µA (typical)
  • Flexible and wide voltage threshold options Table 13-1
    • 2.7 V to 36 V (1.5% maximum accuracy)
    • 800 mV option (1% maximum accuracy)
  • Built-in hysteresis (VHYS)
    • Percentage options: 2% to 13% (1% steps)
    • Fixed options: VTH < 8 V = 0.5 V, 1 V, 1.5 V, 2 V, 2.5 V
  • Programmable reset time delay
    • 10 nF = 12.8 ms, 10 µF = 12.8 s
  • Programmable sense time delay
    • 10 nF = 1.28 ms, 10 µF = 1.28 s
  • Manual Reset (MR) feature
  • Output reset latching feature
  • Output topology: Open-Drain or Push-Pull

The TPS37 is a family of wide input range and low quiescent current window supervisors for fast detection of overvoltage (OV) and undervoltage (UV) conditions. Each device includes a precision internal reference, two independent and configurable voltage comparators and integrated resistor dividers. The TPS37 can be connected directly to and monitor 12 V / 24 V supply rails in a variety of industrial applications including factory automation, motor drives, building automation and others. Built-in hysteresis on the SENSE pins prevents false reset signals when monitoring a supply voltage rail.

The separate VDD and SENSE pins allow redundancy sought by high-reliability systems. SENSE is decoupled from VDD and can monitor higher and lower voltages than VDD. Optional use of external resistors are supported by the high impedance input of the SENSE pins. CTSx and CTRx pins allow delay adjustability on the rising and falling edges of the RESET signals. Also, CTSx functions as a debouncer by ignoring voltage glitches on the monitored voltage rails; CTRx operates as a manual reset (MR) that can be used to force a system reset.

TPS37 is available in a WSON or SOT-23 package. The central pad is non-conductive to increase the creepage between VDD and GND per guidelines in IEC60664. TPS37 operates over –40°C to +125°C TA.

The TPS37 is a family of wide input range and low quiescent current window supervisors for fast detection of overvoltage (OV) and undervoltage (UV) conditions. Each device includes a precision internal reference, two independent and configurable voltage comparators and integrated resistor dividers. The TPS37 can be connected directly to and monitor 12 V / 24 V supply rails in a variety of industrial applications including factory automation, motor drives, building automation and others. Built-in hysteresis on the SENSE pins prevents false reset signals when monitoring a supply voltage rail.

The separate VDD and SENSE pins allow redundancy sought by high-reliability systems. SENSE is decoupled from VDD and can monitor higher and lower voltages than VDD. Optional use of external resistors are supported by the high impedance input of the SENSE pins. CTSx and CTRx pins allow delay adjustability on the rising and falling edges of the RESET signals. Also, CTSx functions as a debouncer by ignoring voltage glitches on the monitored voltage rails; CTRx operates as a manual reset (MR) that can be used to force a system reset.

TPS37 is available in a WSON or SOT-23 package. The central pad is non-conductive to increase the creepage between VDD and GND per guidelines in IEC60664. TPS37 operates over –40°C to +125°C TA.

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Technical documentation

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Type Title Date
* Data sheet TPS37 Wide VIN 65 V Dual Channel Overvoltage & Undervoltage (OV & UV) Detector with Programmable Sense and Reset Delay Function datasheet (Rev. D) 28 Sep 2021
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Functional safety information TPS37 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 12 May 2021
Application note High Voltage – Fast Power Fault Detection by Monitoring 24V AC Systems Using TPS 12 Apr 2021
User guide TPS37AQ1EVM User's Guide 27 Aug 2020

Design & development

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Evaluation board

TPS37AQ1EVM — TPS37 evaluation module for 65-V window supervisor with ultra-low IQ and time-delay function

The TPS37 evaluation module (EVM) is a platform for evaluating the TPS37 and TPS38 family of products. These products offer operation up to 65 V while maintaining low quiescent current, and offer adjustable voltage thresholds, adjustable reset, sense time delays, and configurable manual reset.

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Simulation model

TPS37 and TPS37-Q1 PSpice Transient Model

SNVMC68.ZIP (662 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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SON (DSK) 10 View options

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