Product details

Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) 4.55 Features Battery backup switchover, Watchdog timer, PFI/PFO Reset threshold accuracy (%) 2 Output driver type/reset output Active-low, Push-pull Time delay (ms) 100 Rating Catalog Watchdog timer WDI (sec) 0.8 Operating temperature range (C) -40 to 85
Number of supplies monitored 1 Threshold voltage 1 (Typ) (V) 4.55 Features Battery backup switchover, Watchdog timer, PFI/PFO Reset threshold accuracy (%) 2 Output driver type/reset output Active-low, Push-pull Time delay (ms) 100 Rating Catalog Watchdog timer WDI (sec) 0.8 Operating temperature range (C) -40 to 85
VSSOP (DGK) 8 15 mm² 3 x 4.9
  • Supply Current of 40 µA (Max)
  • Battery Supply Current of 100 nA (Max)
  • Precision 5-V Supply Voltage Monitor, Other Voltage Options on Request
  • Backup-Battery Voltage Can Exceed VDD
  • Watchdog Timer With 800-ms Time-Out
  • Power-On Reset Generator With Fixed 100-ms Reset Delay Time
  • Voltage Monitor for Power-Fail or Low-Battery Monitoring
  • Battery Freshness Seal (TPS3617 Only)
  • 8-Pin MSOP Package
  • Temperature Range: -40° to +85°C
  • APPLICATIONS
    • Fax Machines
    • Set-Top Boxes
    • Advanced Voice Mail Systems
    • Portable Battery Powered Equipment
    • Computer Equipment
    • Advanced Modems
    • Automotive Systems
    • Portable Long-Time Monitoring Equipment
    • Point-of-Sale Equipment

  • Supply Current of 40 µA (Max)
  • Battery Supply Current of 100 nA (Max)
  • Precision 5-V Supply Voltage Monitor, Other Voltage Options on Request
  • Backup-Battery Voltage Can Exceed VDD
  • Watchdog Timer With 800-ms Time-Out
  • Power-On Reset Generator With Fixed 100-ms Reset Delay Time
  • Voltage Monitor for Power-Fail or Low-Battery Monitoring
  • Battery Freshness Seal (TPS3617 Only)
  • 8-Pin MSOP Package
  • Temperature Range: -40° to +85°C
  • APPLICATIONS
    • Fax Machines
    • Set-Top Boxes
    • Advanced Voice Mail Systems
    • Portable Battery Powered Equipment
    • Computer Equipment
    • Advanced Modems
    • Automotive Systems
    • Portable Long-Time Monitoring Equipment
    • Point-of-Sale Equipment

The TPS3617 and TPS3618 are battery-backup supervisors that monitor 5 V supplies. They provide a battery-backup function ideal for applications that require data retention of CMOS RAM during fault conditions. When the voltage at VDD drops below a preset threshold (VIT), the active low push-pull RESET output asserts, and VOUT switches from VDD to VBAT. When VDD rises above the trip threshold, VOUT switches immediately from VBAT to VDD. The RESET output remains low until the delay time (td) expires. During power on, RESET is asserted when the supply voltage (VDD or VBAT) goes higher than 1.1 V.

The PFI and PFO pins are provided if additional voltage monitoring is needed. If the voltage at PFI is less than 1.15 V, the push-pull PFO pin will assert low. When the voltage at PFI exceeds the threshold voltage, PFO will go high.

These devices also feature a watchdog timer pin (WDI) that monitors processor activity and asserts RESET if the the processor is inactive longer than the watchdog timeout period. If the watchdog timer is not used, the WDI pin should be left floating.

The TPS3617 and TPS3618 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of -40°C to +85°C.

The TPS3617 and TPS3618 are battery-backup supervisors that monitor 5 V supplies. They provide a battery-backup function ideal for applications that require data retention of CMOS RAM during fault conditions. When the voltage at VDD drops below a preset threshold (VIT), the active low push-pull RESET output asserts, and VOUT switches from VDD to VBAT. When VDD rises above the trip threshold, VOUT switches immediately from VBAT to VDD. The RESET output remains low until the delay time (td) expires. During power on, RESET is asserted when the supply voltage (VDD or VBAT) goes higher than 1.1 V.

The PFI and PFO pins are provided if additional voltage monitoring is needed. If the voltage at PFI is less than 1.15 V, the push-pull PFO pin will assert low. When the voltage at PFI exceeds the threshold voltage, PFO will go high.

These devices also feature a watchdog timer pin (WDI) that monitors processor activity and asserts RESET if the the processor is inactive longer than the watchdog timeout period. If the watchdog timer is not used, the WDI pin should be left floating.

The TPS3617 and TPS3618 are available in an 8-pin MSOP package and are characterized for operation over a temperature range of -40°C to +85°C.

Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet Battery-Backup Supervisor for RAM Retention datasheet (Rev. D) 10 Dec 2006
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note Optimizing Resistor Dividers at a Comparator (Rev. B) 30 Apr 2021
Certificate TPS36x UL Certification (File: E338656) 17 Apr 2020
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Application note Disabling the Watchdog Timer for TI's Family of Supervisors 30 Oct 2003

Design & development

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

Simulation tool

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 (...)
Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos