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TPS3808E

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Low-quiescent current supervisor with programmable delay and manual reset

Product details

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.67, 3.08, Adjustable Features Manual reset capable, Reset time delay, Separate VDD & sense, Undervoltage monitor only Iq (typ) (mA) 0.0006 Output driver type/reset output Active-low, Open-drain Supply voltage (min) (V) 1.7 Supply voltage (max) (V) 6.5 Rating Catalog Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.67, 3.08, Adjustable Features Manual reset capable, Reset time delay, Separate VDD & sense, Undervoltage monitor only Iq (typ) (mA) 0.0006 Output driver type/reset output Active-low, Open-drain Supply voltage (min) (V) 1.7 Supply voltage (max) (V) 6.5 Rating Catalog Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Undervoltage monitoring for power rails
    • Reliable monitoring with high threshold accuracy (1% typical)
    • Fixed voltage threshold options from 0.9V to 5V
    • Adjustable voltage option available (0.405)
    • Separate Sense pin for monitoring and VDD pin for power
    • Device temperature grade 1: -40°C to +125°C
  • Miniature solution with ultra-low power consumption
    • 0.6µA typical quiescent current
    • Compact 6-pin SOT-23 package (2.99mm x 1.6mm)
  • Highly configurable reset time delay to prevent unsafe power on
    • Adjustable from 1.25ms to 10s
  • Separate Manual Reset Input (MR) to assert RESET output on demand
  • Undervoltage monitoring for power rails
    • Reliable monitoring with high threshold accuracy (1% typical)
    • Fixed voltage threshold options from 0.9V to 5V
    • Adjustable voltage option available (0.405)
    • Separate Sense pin for monitoring and VDD pin for power
    • Device temperature grade 1: -40°C to +125°C
  • Miniature solution with ultra-low power consumption
    • 0.6µA typical quiescent current
    • Compact 6-pin SOT-23 package (2.99mm x 1.6mm)
  • Highly configurable reset time delay to prevent unsafe power on
    • Adjustable from 1.25ms to 10s
  • Separate Manual Reset Input (MR) to assert RESET output on demand

The TPS3808E family of microprocessor supervisory circuits monitors system voltages from 0.4V to 5V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds.

The TPS3808E device uses a precision reference to achieve 0.5% threshold accuracy. The reset delay time can be set to 20ms by disconnecting the CT pin, 300ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CT pin to an external capacitor. The TPS3808E device has a very low typical quiescent current of 0.6µA, and is designed for battery-powered applications. The TPS3808E is available in the SOT-23 (6) , and is fully specified over a temperature range of –40°C to 125°C (TJ).

The TPS3808E family of microprocessor supervisory circuits monitors system voltages from 0.4V to 5V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds.

The TPS3808E device uses a precision reference to achieve 0.5% threshold accuracy. The reset delay time can be set to 20ms by disconnecting the CT pin, 300ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CT pin to an external capacitor. The TPS3808E device has a very low typical quiescent current of 0.6µA, and is designed for battery-powered applications. The TPS3808E is available in the SOT-23 (6) , and is fully specified over a temperature range of –40°C to 125°C (TJ).

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* Data sheet TPS3808E Low-Quiescent-Current, Programmable-Delay Supervisory Circuit datasheet (Rev. B) PDF | HTML 16 Jan 2024
Application brief Using Voltage Supervisors in High Voltage Applications (Rev. B) PDF | HTML 20 Feb 2023

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Evaluation board

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SOT-23 (DBV) 6 View options

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