ZHCSOF5A May   2022  – September 2022 TPS25985

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 说明（续）
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Logic Interface
    7. 7.7 Timing Requirements
    8. 7.8 Switching Characteristics
    9. 7.9 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Undervoltage Protection
      2. 8.3.2  Insertion Delay
      3. 8.3.3  Overvoltage Protection
      4. 8.3.4  Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 8.3.4.1 Slew rate (dVdt) and Inrush Current Control
          1. 8.3.4.1.1 Start-Up Time Out
        2. 8.3.4.2 Steady-State Overcurrent Protection (Circuit-Breaker)
        3. 8.3.4.3 Active Current Limiting During Start-Up
        4. 8.3.4.4 Short-Circuit Protection
      5. 8.3.5  Analog Load Current Monitor (IMON)
      6. 8.3.6  Mode Selection (MODE)
      7. 8.3.7  Parallel Device Synchronization (SWEN)
      8. 8.3.8  Stacking Multiple eFuses for Unlimited Scalability
        1. 8.3.8.1 Current Balancing During Start-Up
      9. 8.3.9  Analog Junction Temperature Monitor (TEMP)
      10. 8.3.10 Overtemperature Protection
      11. 8.3.11 Fault Response and Indication (FLT)
      12. 8.3.12 Power Good Indication (PG)
      13. 8.3.13 Output Discharge
      14. 8.3.14 General Purpose Comparator
      15. 8.3.15 FET Health Monitoring
      16. 8.3.16 Single Point Failure Mitigation
        1. 8.3.16.1 IMON Pin Single Point Failure
        2. 8.3.16.2 ILIM Pin Single Point Failure
        3. 8.3.16.3 IREF Pin Single Point Failure
        4. 8.3.16.4 ITIMER Pin Single Point Failure
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Single Device, Standalone Operation
      2. 9.1.2 Multiple Devices, Parallel Connection
    2. 9.2 Typical Application: 12-V, 3.6-kW Power Path Protection in Datacenter Servers
      1. 9.2.1 Application
      2. 9.2.2 Design Requirements
      3. 9.2.3 Detailed Design Procedure
      4. 9.2.4 Application Performance Plots
    3. 9.3 Multiple eFuses, Parallel Connection with PMBus
    4. 9.4 Digital Telemetry Using External Microcontroller
    5. 9.5 What to Do and What Not to Do
  10. 10Power Supply Recommendations
    1. 10.1 Transient Protection
    2. 10.2 Output Short-Circuit Measurements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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6 Pin Configuration and Functions

GUID-20211230-SS0I-W0TG-NCDF-8PJ8QG1TTKVJ-low.gifFigure 6-1 TPS25985x RQP Package 26-pin QFN Top View
Table 6-1 Pin Functions

PIN

TYPE

DESCRIPTION

NAME

NO.

CMPOUT

1

O

General purpose comparator open-drain output

CMPM

2

I

General purpose comparator negative input

CMPP

3

I

General purpose comparator positive input

DVDT

4

I/O

Start-up output slew rate control pin. Leave this pin open to allow fastest start-up. Connect capacitor to ground to slow down the slew rate to manage inrush current.

TEMP

5

O

Die junction temperature monitor analog voltage output. Can be tied together with TEMP outputs of multiple devices in a parallel configuration to indicate the peak temperature of the chain.

ITIMER

6

I/O

A capacitor from this pin to GND sets the overcurrent blanking interval during which the output current can temporarily exceed the overcurrent threshold (but lower than fast-trip threshold) during steady-state operation before the device overcurrent response takes action.

IMON

7

O

An external resistor from this pin to GND sets the overcurrent protection threshold and fast-trip threshold during steady-state. This pin also acts as a fast and accurate analog output load current monitor signal during steady-state. Do not leave floating.

ILIM

8

O

An external resistor from this pin to GND sets the current limit threshold and fast-trip threshold during start-up. This also sets the active current sharing threshold during steady-state. Do not leave floating.

IREF

9

I/O

Reference voltage for overcurrent, short-circuit protection and active current sharing blocks. Can be generated using internal current source and resistor on this pin, or can be driven from external voltage source. Do not leave floating.

OUT

10, 11, 12, 13

P

Power output. Must be soldered to output power plane uniformly to ensure proper heat dissipation and to maintain optimal current distribution through the device.

GND

14

G

Device ground reference pin. Connect to system ground.

DNC

15

X

Do not connect anything to this pin.

DNC

16

X

Do not connect anything to this pin.

MODE

17

I

MODE selection pin. Leave the pin floating for standalone and primary mode of operation. Connect the pin to GND to configure device as a secondary device in a parallel chain.

EN/UVLO

18

I

Active high enable input. Connect resistor divider from input supply to set the undervoltage threshold. Do not leave floating.

PG

19

I/O

Open-drain active high Power Good indication

FLT

20

O

Open-drain active low fault indication

SWEN

21

I/O

Open-drain signal to indicate and control power switch ON/OFF status. This pin facilitates active synchronization between multiple devices in a parallel chain.

VDD

22

P

Controller power input pin. Can be used to power the internal control circuitry with a filtered and stable supply which is not affected by system transients. Connect this pin to VIN through a series resistor and add a decoupling capacitor to GND.

IN

23, 24, 25, 26

P

Power input. Must be soldered to input power plane uniformly to ensure proper heat dissipation and to maintain optimal current distribution through the device.
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