SLVSGE8B November   2022  – August 2024 TPS35-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Timing Diagrams
    9. 6.9 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Voltage Supervisor
      2. 7.3.2 Timeout Watchdog Timer
        1. 7.3.2.1 tWD Timer
        2. 7.3.2.2 Watchdog Enable Disable Operation
        3. 7.3.2.3 tSD Watchdog Start Up Delay
        4. 7.3.2.4 SET Pin Behavior
      3. 7.3.3 Manual RESET
      4. 7.3.4 RESET and WDO Output
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 CRST Delay
        1. 8.1.1.1 Factory-Programmed watchdog Timing
        2. 8.1.1.2 Adjustable Capacitor Timing
      2. 8.1.2 Watchdog Timer Functionality
        1. 8.1.2.1 Factory-Programmed watchdog Timing
        2. 8.1.2.2 Adjustable Capacitor Timings
    2. 8.2 Typical Applications
      1. 8.2.1 Design 1: Monitoring a Microcontroller Supply Voltage and Watchdog Timer
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Setting the Voltage Threshold
          2. 8.2.1.2.2 Meeting the Watchdog Timeout Period
          3. 8.2.1.2.3 Setting the Reset Delay
          4. 8.2.1.2.4 Setting the Startup Delay and Output Topology
          5. 8.2.1.2.5 Calculating the RESET Pullup Resistor
        3. 8.2.1.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

6.5 Electrical Characteristics

At 1.04V ≤ VDD ≤ 6V, MR = Open, RESET pull-up resistor (Rpull-up) = 100kΩ to VDD, WDO pull-up resistor (Rpull-up) = 100kΩ to VDD, output load (CLOAD) = 10pF and over operating free-air temperature range –40℃ to 125℃, unless otherwise noted. VDD ramp rate ≤ 1V/µs. Typical values are at TA = 25℃
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
COMMON PARAMETERS
VDD Input supply voltage Active LOW output 1.04 6 V
VIT– Negative-going input threshold accuracy (1) VIT– = 1.05V to 1.95V –1.4 ±0.5 1.4 %
VIT– = 2.0V to 5.4V –1.2 ±0.5 1.2
VHYS Hysteresis VIT– pin VIT– = 1.05V to 5.4V 3 5 7 %
IDD Supply current into VDD pin (2) VDD = 2V
VIT– = 1.05V to 1.9V		 TA = –40℃ to 85℃  0.25 0.8 µA
0.25 3
VDD = 6V
VIT– = 1.05V to 5.4V		 TA = –40℃ to 85℃  0.25 0.8
0.25 3
VIL Low level input voltage WD–EN, WDI, SETx, MR(2) 0.3VDD V
VIH High level input voltage WD–EN, WDI, SETx, MR(2) 0.7VDD V
RMR Manual reset internal pull-up resistance 100 kΩ
RESET / WDO (Open-drain active-low)
VOL Low level output voltage
 		 VDD =1.5V, 1.55V ≤ VIT– ≤ 3.35V
IOUT(Sink) = 500µA		 300 mV
VDD = 3.3V, 3.4V ≤ VIT– ≤ 5.4V
IOUT(Sink) = 2mA		 300 mV
Ilkg(OD) Open-Drain output leakage current VDD = VPULLUP = 6V
TA = –40℃ to 85℃		 10 30 nA
VDD = VPULLUP = 6V 10 120 nA
RESET / WDO (Push-pull active-low)
VPOR Power on RESET voltage (3) VOL(max) = 300mV
IOUT(Sink) = 15µA		 900 mV
VOL Low level output voltage
 		 VDD = 0.9V, 1.05V ≤ VIT– ≤ 1.5V
IOUT(Sink) = 15µA		 300 mV
VDD = 1.5V, 1.55V ≤ VIT– ≤ 3.35V
IOUT(Sink) = 500µA		 300
VDD = 3.3V, 3.4V ≤ VIT– ≤ 5.4V
IOUT(Sink) = 2mA		 300
VOH High level output voltage
 		 VDD = 1.8V, 1.05V ≤ VIT– ≤ 1.4V
IOUT(Source) = 500µA		 0.8VDD V
VDD = 3.3V, 1.45V ≤ VIT– ≤ 3.0V
IOUT(Source) = 500µA		 0.8VDD
VDD = 6V, 3.05V ≤ VIT– ≤ 5.4V
IOUT(Source) = 2mA		 0.8VDD
(1) VIT– threshold voltage range from 1.05V to 5.4V in 50mV steps.
(2) If the logic signal driving MR is less than VDD, then additional current flows into VDD and out of MR.
(3) VPOR is the minimum VDD voltage level for a controlled output state