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TPS35-Q1

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Automotive, nano-quiescent-current, precision supervisor with timeout watchdog

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Data sheet

TPS35-Q1

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Data sheet Order now

Product details

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) Programmable & Fixed Features Manual reset capable, Reset time delay, Undervoltage monitor only, Watchdog disable, Watchdog timer Reset threshold accuracy (%) 1.2 Iq (typ) (mA) 0.00025 Output driver type/reset output Active-low, Open-drain Supply voltage (min) (V) 0.7 Supply voltage (max) (V) 6 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) Programmable & Fixed Features Manual reset capable, Reset time delay, Undervoltage monitor only, Watchdog disable, Watchdog timer Reset threshold accuracy (%) 1.2 Iq (typ) (mA) 0.00025 Output driver type/reset output Active-low, Open-drain Supply voltage (min) (V) 0.7 Supply voltage (max) (V) 6 Rating Catalog Watchdog timer WDI (s) Programmable Operating temperature range (°C) -40 to 125
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • Input voltage range: VDD = 1.04 V to 6.0 V
  • Fixed threshold voltage (VIT-): 1.05 V to 5.4 V
    • Threshold voltage available in 50 mV steps
    • 1.2% Voltage threshold accuracy (maximum)
    • Built-in hysteresis (VHYS): 5% (Typical)
  • Ultra low supply current: IDD = 250 nA (typical)
  • Factory programmed or user-programmable watchdog timeout
    • ±10% Accurate timer (maximum)
    • Factory programmed: 1 msec to 100 sec
  • Factory programmed or user-programmable reset delay
    • ±10% Accurate timer (maximum)
    • Factory programmed option: 2 msec to 10 sec
  • Open-drain, push-pull; active-low outputs
  • Various programmability options:
    • Watchdog enable-disable
    • Watchdog startup delay: no delay to 10 sec
    • On the fly timer extension: 1X to 256X
    • Latched output option
  • MR functionality support
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range
  • Input voltage range: VDD = 1.04 V to 6.0 V
  • Fixed threshold voltage (VIT-): 1.05 V to 5.4 V
    • Threshold voltage available in 50 mV steps
    • 1.2% Voltage threshold accuracy (maximum)
    • Built-in hysteresis (VHYS): 5% (Typical)
  • Ultra low supply current: IDD = 250 nA (typical)
  • Factory programmed or user-programmable watchdog timeout
    • ±10% Accurate timer (maximum)
    • Factory programmed: 1 msec to 100 sec
  • Factory programmed or user-programmable reset delay
    • ±10% Accurate timer (maximum)
    • Factory programmed option: 2 msec to 10 sec
  • Open-drain, push-pull; active-low outputs
  • Various programmability options:
    • Watchdog enable-disable
    • Watchdog startup delay: no delay to 10 sec
    • On the fly timer extension: 1X to 256X
    • Latched output option
  • MR functionality support

The TPS35-Q1 is an ultra-low power consumption (250 nA typical) device offering a precision voltage supervisor with a programmable watchdog timer. The TPS35-Q1 supports wide threshold levels for undervoltage supervision with 1.2% accuracy across the specified temperature range.

The TPS35-Q1 offers a high accuracy watchdog timer with a host of features for a wide variety of applications. The watchdog timer can be factory programmed or user programmed using an external capacitor. The timer value can be changed on-the-fly using a combination of logic pins. The watchdog feature can be enabled or disabled using a dedicated pin or combination of timer extension pins. The device also offers start-up delay options to disable watchdog monitoring for fixed time immediately after host power up or a RESET event. The TPS35-Q1 offers a pinout option with an independent WDO pin. This helps determine the nature of the fault condition.

The RESET or WDO delay can be set by factory-programmed default delay settings or programmed by an external capacitor. The device also offers a latched output operation where the output is latched until the supervisor or watchdog fault is cleared.

The TPS35-Q1 is available in a small 8-pin SOT23 package.

The TPS35-Q1 is an ultra-low power consumption (250 nA typical) device offering a precision voltage supervisor with a programmable watchdog timer. The TPS35-Q1 supports wide threshold levels for undervoltage supervision with 1.2% accuracy across the specified temperature range.

The TPS35-Q1 offers a high accuracy watchdog timer with a host of features for a wide variety of applications. The watchdog timer can be factory programmed or user programmed using an external capacitor. The timer value can be changed on-the-fly using a combination of logic pins. The watchdog feature can be enabled or disabled using a dedicated pin or combination of timer extension pins. The device also offers start-up delay options to disable watchdog monitoring for fixed time immediately after host power up or a RESET event. The TPS35-Q1 offers a pinout option with an independent WDO pin. This helps determine the nature of the fault condition.

The RESET or WDO delay can be set by factory-programmed default delay settings or programmed by an external capacitor. The device also offers a latched output operation where the output is latched until the supervisor or watchdog fault is cleared.

The TPS35-Q1 is available in a small 8-pin SOT23 package.
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NEW TPS3435-Q1 PREVIEW Automotive nano-quiescent-current precision watchdog timer TPS3435-Q1 is the timeout-watchdog-only version of TPS35-Q1.

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* Data sheet TPS35-Q1 Automotive Nano IQ Precision Voltage Supervisor with Precision Watchdog Timer datasheet PDF | HTML 15 Jun 2021

Design & development

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Evaluation board

TPS36Q1EVM — TPS36 evaluation module for nano-quiescent-current precision supervisor

The TPS36Q1EVM is an evaluation module (EVM) for the TPS3435-Q1, TPS3436-Q1, TPS35-Q1 and TPS36-Q1 voltage supervisors. This family of automotive-grade products has support for undervoltage-supervisor and watchdog functionality. Please refer to each product's data sheet for specific functions.

(...)

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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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