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TPS38-Q1

ACTIVE

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

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Data sheet

TPS38-Q1

ACTIVE
Data sheet Order now

Product details

Number of supplies monitored 1, 2 Threshold voltage 1 (typ) (V) 0.8, 4.8, 5.1, 5.8, 9.5, adjustable Features Detection time delay, Latching, Manual reset capable, Overvoltage monitor only, Reset time delay, Separate VDD & sense, Undervoltage and overvoltage monitor, Undervoltage monitor only, Wide VIN, Wide input voltage Reset threshold accuracy (%) 1, 1.5 Iq (typ) (mA) 0.0007, 0.001 Output driver type/reset output Active-high, Active-low, Open-drain, Push-Pull Time delay (ms) 40, 90, 100 Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 65 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
Number of supplies monitored 1, 2 Threshold voltage 1 (typ) (V) 0.8, 4.8, 5.1, 5.8, 9.5, adjustable Features Detection time delay, Latching, Manual reset capable, Overvoltage monitor only, Reset time delay, Separate VDD & sense, Undervoltage and overvoltage monitor, Undervoltage monitor only, Wide VIN, Wide input voltage Reset threshold accuracy (%) 1, 1.5 Iq (typ) (mA) 0.0007, 0.001 Output driver type/reset output Active-high, Active-low, Open-drain, Push-Pull Time delay (ms) 40, 90, 100 Supply voltage (min) (V) 2.7 Supply voltage (max) (V) 65 TI functional safety category Functional Safety-Capable Rating Automotive Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
SOT-23-THN (DYY) 14 13.692 mm² 4.2 x 3.26 WSON (DSK) 10 6.25 mm² 2.5 x 2.5
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature T A
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C7B
  • 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
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature T A
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C7B
  • 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-Q1 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 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-Q1 is available in WSON or SOT-23 package. The WSON package has wettable flanks allowing the facilitation 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.

The TPS38-Q1 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 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-Q1 is available in WSON or SOT-23 package. The WSON package has wettable flanks allowing the facilitation 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.
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Technical documentation

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Type Title Date
* Data sheet TPS38-Q1 Wide VIN 65 V Dual Channel Overvoltage or Undervoltage (OV or UV) Detector with Programmable Sense and Reset Function for Automotive datasheet (Rev. E) PDF | HTML 20 Jul 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
Functional safety information TPS3x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 08 Jul 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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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User guide: PDF | HTML
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Simulation model

TPS38 and TPS38-Q1 PSpice Transient Model

SNVMC72.ZIP (277 KB) - PSpice Model
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Design tool

TPS37-ADJ-CALC — TPS37, TPS38, and TPS3760 adjustable-resistor and time-delay calculator

This calculator tool guides the user through the design process for the adjustable variants of the TPS37/38 dual-channel supervisors. The default voltage threshold and hysteresis level for these devices are set to 800 mV and 2% respectively, but can be adjusted through the addition of resistors. (...)
Supported products & hardware

Supported products & hardware

Products
Supervisor & reset ICs
TPS37 — 65-V window supervisor with ultra-low quiescent current and time-delay function TPS37-Q1 — Automotive 65-V window supervisor with ultra-low quiescent current and time-delay function TPS38-Q1 — Automotive 65-V dual-channel supervisor with ultra-low quiescent current and time-delay function TPS3760 — 65-V overvoltage or undervoltage supervisor with sense, ultra-low quiescent current and delay TPS3760-Q1 — Automotive 65-V overvoltage or undervoltage supervisor with sense, ultra-low IQ and delay
Hardware development
Evaluation board
TPS37AQ1EVM — TPS37 evaluation module for 65-V window supervisor with ultra-low IQ and time-delay function TPS3760EVM — TPS3760 evaluation module for 65-V overvoltage or undervoltage supervisor with sense, IQ and delay
Launch
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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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SOT-23-THN (DYY) 14 Ultra Librarian
WSON (DSK) 10 Ultra Librarian
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