SNVSCF5A
June 2023 – December 2023
TPS35
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Device Comparison
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Thermal Information
6.6
Electrical Characteristics
6.7
Timing Requirements
6.8
Switching Characteristics
6.9
Timing Diagrams
6.10
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagrams
7.3
Feature Description
7.3.1
Voltage Supervisor
7.3.2
Timeout Watchdog Timer
7.3.2.1
tWD Timer
7.3.2.2
Watchdog Enable Disable Operation
7.3.2.3
tSD Watchdog Start Up Delay
7.3.2.4
SET Pin Behavior
7.3.3
Manual RESET
7.3.4
RESET and WDO Output
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.1.1
Output Assert Delay
8.1.1.1
Factory-Programmed Output Assert Delay Timing
8.1.1.2
Adjustable Capacitor Timing
8.1.2
Watchdog Timer Functionality
8.1.2.1
Factory-Programmed Timing Options
8.1.2.2
Adjustable Capacitor Timing
8.2
Typical Applications
8.2.1
Design 1: Monitoring a Microcontroller Supply Voltage and Watchdog Timer
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Setting the Voltage Threshold
8.2.1.2.2
Meeting the Watchdog Timeout Period
8.2.1.2.3
Setting the Reset Delay
8.2.1.2.4
Setting the Startup Delay and Output Topology
8.2.1.2.5
Calculating the RESET Pullup Resistor
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Receiving Notification of Documentation Updates
9.2
Support Resources
9.3
Trademarks
9.4
Electrostatic Discharge Caution
9.5
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DSE|6
MPDS287A
DDF|8
MPDS569D
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvscf5a_oa
snvscf5a_pm
1
Features
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
Input voltage range: V
DD
= 1.04 V to 6.0 V
Fixed threshold voltage (V
IT-
): 1.05 V to 5.4 V
Threshold voltage available in 50 mV steps
1.2% Voltage threshold accuracy (maximum)
Built-in hysteresis (V
HYS
): 5% (typical)
Ultra low supply current: I
DD
= 250 nA (typical)
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