Product details


Number of supplies monitored 1, 2 Threshold voltage 1 (Typ) (V) 0.8 Features Manual reset, Reset time delay, Sense delay, Undervoltage and overvoltage monitor, Wide input voltage Reset threshold accuracy (%) 1.5 Output driver type/reset output Active-low, Open-drain Time delay (ms) Programmable Rating Catalog Watchdog timer WDI (sec) None Operating temperature range (C) -40 to 125 open-in-new Find other Supervisor & reset ICs

Package | Pins | Size

WSON (DSK) 10 open-in-new Find other Supervisor & reset ICs


  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C7B
  • VDD: 2.7 V to 65 V (VPOR = 1.4 V)
  • SENSE and RESET pins are 65 V graded
  • Low supply current: 1 µA (Typ.)
  • Flexible voltage options Table 14-2
    • 2.7 V to 36 V (1.5% max accuracy)
    • 800 mV option (1% max 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 feature
  • Output reset latching feature
  • Output topology:
    • Channel 1: Open-Drain or Push-Pull topologies
    • Channel 2: Open-Drain
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The TPS37x-Q1 is a 65 V-input voltage detector with 1 µA IDD, 1% accuracy, and 10 µs detection time in a 6.25 mm2 package. This device can be connected directly to 12 V / 24 V automotive battery system for continous monitoring of over (OV) and under (UV) voltage conditions; with its internal resistor divider, it offers the smallest total solution size. Wide hysteresis voltage options are available to ignore cold crank, start-stop and various car battery voltage transients. Built-in hysteresis on the SENSE pins prevents false reset signals when monitoring a supply voltage rail.

The separate VDD and SENSE pins allow for the redundancy sought by high-reliability automotive systems and SENSE can monitor higher and lower voltages than VDD. Optional use of external resistors are supported by the high impedance input of the SENSE pins. Both CTSx and CTRx provide 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.

The TPS37x-Q1 is available in a small 2.5-mm×2.5-mm×0.1-mm WSON 10-pin wettable flanks package allowing the facillitation for Automatic Optical Inspection (AOI) and low resolution X-ray inspection. The central pad is non-conductive to increase the creepage between VDD and GND per guidelines in IEC60664. TPS37x-Q1 operates over –40°C to +125°C (TA).

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Technical documentation

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Type Title Date
* Data sheet TPS37x-Q1 (65 V & 2 µA) Over & Undervoltage Detector with Delay Function datasheet (Rev. A) Jan. 21, 2021
Technical article Monitoring 12-V automotive battery systems: Load-dump, cold-crank and false-reset management Mar. 24, 2021
User guide TPS37AQ1EVM User's Guide Aug. 27, 2020

Design & development

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Hardware development

document-generic User guide

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.


  • 10-pin compact DSK package
  • Programmable reset and sense delay
  • Overvoltage and undervoltage monitor
  • Open-drain/push-pull output topology
  • Configurable manual reset

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