SLVSHA1D
September 2024 – July 2026
TPS1685
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
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
Electrical Characteristics
6.6
Logic Interface
6.7
Timing Requirements
6.8
Switching Characteristics
6.9
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Undervoltage Protection
7.3.2
Insertion Delay
7.3.3
Overvoltage Protection
7.3.4
Inrush Current, Overcurrent, and Short-Circuit Protection
7.3.4.1
Slew Rate (dVdt) and Inrush Current Control
7.3.4.1.1
Start-Up Time Out
7.3.4.2
Steady-State Overcurrent Protection (Circuit-Breaker)
7.3.4.3
Active Current Limiting During Start-Up
7.3.4.4
Short-Circuit Protection
7.3.5
Analog Load Current Monitor (IMON)
7.3.6
Mode Selection (MODE)
7.3.7
Parallel Device Synchronization (SWEN)
7.3.8
Stacking Multiple eFuses for Unlimited Scalability
7.3.8.1
Current Balancing During Start-Up
7.3.9
Analog Junction Temperature Monitor (TEMP)
7.3.10
Overtemperature Protection
7.3.11
Fault Response and Indication (FLT)
7.3.12
Power Good Indication (PG)
7.3.13
Output Discharge
7.3.14
FET Health Monitoring
7.3.15
Single Point Failure Mitigation
7.3.15.1
IMON Pin Single Point Failure
7.3.15.2
IREF Pin Single Point Failure
7.3.15.3
ITIMER Pin Single Point Failure
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.1.1
Single Device, Standalone Operation
8.1.2
Multiple Devices, Parallel Connection
8.2
Typical Application: 54V Power Path Protection in Data Center Servers
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.3
Application Curves
8.3
Power Supply Recommendations
8.3.1
Transient Protection and Other Design Considerations
8.3.2
Output Short-Circuit Measurements
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Documentation Support
9.1.1
Related Documentation
9.2
Receiving Notification of Documentation Updates
9.3
Support Resources
9.4
Trademarks
9.5
Electrostatic Discharge Caution
9.6
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
4
Device Comparison Table
PART NUMBER
FAULT BEHAVIOR
FIXED FAST TRIP THRESHOLD (FFT)
TPS16850
Auto-retry
73A
TPS16851
Latch-off
73A
TPS16850A
Auto-retry
83A
TPS16851A
Latch-off
83A