TPS38

ACTIVE

65-V dual-channel supervisor with ultra-low quiescent current and time-delay function

Product details

Number of supplies monitored 1, 2 Threshold voltage 1 (typ) (V) 2.9, 7.5, adjustable Features Detection time delay, Manual reset capable, Overvoltage monitor only, Reset time delay, Separate VDD & sense, Undervoltage monitor only, Wide input voltage Reset threshold accuracy (%) 1.5 Iq (typ) (mA) 0.001 Output driver type/reset output Active-high, Active-low, Open-drain, Push-Pull Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 65 TI functional safety category Functional Safety-Capable Rating Catalog Operating temperature range (°C) -40 to 125
Number of supplies monitored 1, 2 Threshold voltage 1 (typ) (V) 2.9, 7.5, adjustable Features Detection time delay, Manual reset capable, Overvoltage monitor only, Reset time delay, Separate VDD & sense, Undervoltage monitor only, Wide input voltage Reset threshold accuracy (%) 1.5 Iq (typ) (mA) 0.001 Output driver type/reset output Active-high, Active-low, Open-drain, Push-Pull Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 65 TI functional safety category Functional Safety-Capable Rating Catalog Operating temperature range (°C) -40 to 125
WSON (DSK) 10 6.25 mm² 2.5 x 2.5
  • Wide supply voltage range: 2.7 V to 65 V
  • Functional Safety-Capable targeted
    • Documentation available to aid functional safety system design
  • SENSE and RESET pins are 65 V graded
  • Low quiescent current: 1 µA (typical)
  • Flexible and wide voltage threshold options
    • 2.7 V to 36 V (1.5% maximum accuracy)
    • 800 mV option (1% maximum accuracy)
  • Built-in hysteresis (V HYS)
    • Percentage options: 2% to 13% (1% steps)
    • Fixed options: V TH < 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 topology:
    • Channel 1: Open-Drain or Push-Pull
    • Channel 2: Open-Drain
  • Wide supply voltage range: 2.7 V to 65 V
  • Functional Safety-Capable targeted
    • Documentation available to aid functional safety system design
  • SENSE and RESET pins are 65 V graded
  • Low quiescent current: 1 µA (typical)
  • Flexible and wide voltage threshold options
    • 2.7 V to 36 V (1.5% maximum accuracy)
    • 800 mV option (1% maximum accuracy)
  • Built-in hysteresis (V HYS)
    • Percentage options: 2% to 13% (1% steps)
    • Fixed options: V TH < 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 topology:
    • Channel 1: Open-Drain or Push-Pull
    • Channel 2: Open-Drain

The TPS38 is a 65 V input voltage detector with 1 µA I DD, 1% accuracy, and with a fast 10 µs detection time. This device can be connected directly to 12 V / 24 V automotive battery system for continuous monitoring of over (OV) or 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. 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.

The TPS38 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. TPS38 operates over –40°C to +125°C T A.

The TPS38 is a 65 V input voltage detector with 1 µA I DD, 1% accuracy, and with a fast 10 µs detection time. This device can be connected directly to 12 V / 24 V automotive battery system for continuous monitoring of over (OV) or 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. 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.

The TPS38 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. TPS38 operates over –40°C to +125°C T A.

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Technical documentation

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* Data sheet TPS38 Wide VIN 65 V Dual Channel Overvoltage or Undervoltage (OV or UV) Detector with Programmable Sense and Reset Function datasheet (Rev. A) PDF | HTML 08 Sep 2023
Application note Common Applications of Wide VIN Overvoltage and Undervoltage Supervisors PDF | HTML 19 Sep 2023
Application brief Using Voltage Supervisors in High Voltage Applications (Rev. B) PDF | HTML 20 Feb 2023

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

TPS38 and TPS38-Q1 PSpice Transient Model

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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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WSON (DSK) 10 View options

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