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Reset & watchdog ICs

TPS3808

ACTIVE

Low-quiescent current supervisor with programmable delay & manual reset

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Data sheet

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TPS3808E ACTIVE 600nA ultra-low quiescent current supervisor with programmable delay and manual reset TPS3808E offers superior accuracy to help optimize system reset timing, and a 4-fold reduction in quiescent current.

TPS3808

ACTIVE
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Product details

Rating Catalog Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.405, 0.84, 1.12, 1.16, 1.4, 1.67, 1.77, 2.33, 2.79, 3.07, 4.65, Adjustable Features Manual reset capable Reset threshold accuracy (%) 2 Iq (typ) (mA) 0.0024 Output driver type/reset output Active-low, Open-drain Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
Rating Catalog Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.405, 0.84, 1.12, 1.16, 1.4, 1.67, 1.77, 2.33, 2.79, 3.07, 4.65, Adjustable Features Manual reset capable Reset threshold accuracy (%) 2 Iq (typ) (mA) 0.0024 Output driver type/reset output Active-low, Open-drain Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 6 8.12 mm² (2.9 mm × 2.8 mm) WSON (DRV) 6 4 mm² (2 mm × 2 mm)
  • Power-on reset generator with adjustable delay time: 1.25 ms to 10 s
  • Very low quiescent current: 2.4 µA typical
  • High threshold accuracy: 0.5% typical
  • Fixed threshold voltages for standard voltage rails from 0.9 V to 5 V and adjustable voltage down to 0.4 V are available
  • Manual reset ( MR) input
  • Open-drain RESET output
  • Temperature range: –40°C to 125°C
  • Small SOT-23 and 2-mm × 2-mm WSON packages
  • Power-on reset generator with adjustable delay time: 1.25 ms to 10 s
  • Very low quiescent current: 2.4 µA typical
  • High threshold accuracy: 0.5% typical
  • Fixed threshold voltages for standard voltage rails from 0.9 V to 5 V and adjustable voltage down to 0.4 V are available
  • Manual reset ( MR) input
  • Open-drain RESET output
  • Temperature range: –40°C to 125°C
  • Small SOT-23 and 2-mm × 2-mm WSON packages

The TPS3808 family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5 V, 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 TPS3808 device uses a precision reference to achieve 0.5% threshold accuracy for VIT ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 device has a very low typical quiescent current of 2.4 µA, so it is well-suited to battery-powered applications. It is available in the SOT-23 and 2-mm × 2-mm WSON packages, and is fully specified over a temperature range of –40°C to 125°C (TJ).

The TPS3808 family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5 V, 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 TPS3808 device uses a precision reference to achieve 0.5% threshold accuracy for VIT ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 device has a very low typical quiescent current of 2.4 µA, so it is well-suited to battery-powered applications. It is available in the SOT-23 and 2-mm × 2-mm WSON packages, and is fully specified over a temperature range of –40°C to 125°C (TJ).
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS3808 Low-Quiescent-Current, Programmable-Delay Supervisory Circuit datasheet (Rev. M) PDF | HTML Mar 4, 2023
Application note Voltage and Processor Monitoring Solutions in Factory Automation and Control App (Rev. A) Aug 5, 2021
Application note Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) Mar 17, 2020
Selection guide Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) Feb 28, 2020
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics Jun 28, 2019
Application note Comparing Voltage and Processor Monitoring Solutions Apr 5, 2019
Application brief Latching a Voltage Supervisor (Reset IC) (Rev. A) Apr 5, 2019
Application brief Mitigating the Voltage Glitch on the Output of a Voltage Supervisor (Reset IC) D Jun 27, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun 25, 2018
Design guide Using the TMS320C6657 to Implement Efficient OPUS Codec Solution Design Guide Jun 16, 2015
Application note Setting the SVS Voltage Monitor Threshold May 23, 2012
Application note Choosing an Appropriate Pull-up/Pull-down Resistor for Open Drain Outputs Sep 19, 2011
Application note Sensitivity Analysis for Power Supply Design Sep 6, 2011
Application note Power Two Xilinx(TM) LX240 Virtex-6(TM) Devices Apr 20, 2010
White paper Spartan 6 LX150T Modular Solution Oct 14, 2009
User guide Virtex 6 LX130T Module design Aug 27, 2009

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SOT-23 (DBV) 6 Ultra Librarian
WSON (DRV) 6 Ultra Librarian
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