SLVSHR6A July   2025  – November 2025 TPS1686

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 Logic Interface
    7. 6.7 Timing Requirements
    8. 6.8 Switching Characteristics
    9. 6.9 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Undervoltage Protection
      2. 7.3.2  Insertion Delay
      3. 7.3.3  Overvoltage Protection
      4. 7.3.4  Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 7.3.4.1 Slew Rate (dVdt) and Inrush Current Control
          1. 7.3.4.1.1 Start-Up Time Out
        2. 7.3.4.2 Steady-State Overcurrent Protection (circuit-breaker)
        3. 7.3.4.3 Active Current Limiting During Start-Up
        4. 7.3.4.4 Short-Circuit Protection
      5. 7.3.5  Analog Load Current Monitor (IMON)
      6. 7.3.6  Switch Enable Pin (SWEN)
      7. 7.3.7  Analog Junction Temperature Monitor (TEMP)
      8. 7.3.8  Overtemperature Protection
      9. 7.3.9  Fault Response and Indication (FLT)
      10. 7.3.10 Power Good Indication (PG)
      11. 7.3.11 Output Discharge
      12. 7.3.12 FET Health Monitoring
      13. 7.3.13 Single Point Failure Mitigation
        1. 7.3.13.1 IMON Pin Single Point Failure
        2. 7.3.13.2 IREF Pin Single Point Failure
        3. 7.3.13.3 ITIMER Pin Single Point Failure
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Single Device, Standalone Operation
    2. 8.2 Typical Application: 54V Fan Load Protection in Datacenter Servers
      1. 8.2.1 Application
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
      4. 8.2.4 Application Performance Plots
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Transient Protection
      2. 8.3.2 Output Short-Circuit Measurements
    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 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

5 Pin Configuration and Functions

Figure 5-1 NLM Package, 23-Pin VQFN (top view)
Table 5-1 Pin Functions
PINTYPE(1)DESCRIPTION
NAMENO.
ILIM1I/OOutputs a proportional current to the load current. Connect an external resistor from this pin to GND to monitor the load current.
IMON2I/OAn 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.
IREF3I/OReference 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.

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.

GND5GDevice ground reference pin. Connect to system ground.
SFT_SEL6I/OSelects the Scalable fast trip threshold multiplier during steady state. Connect a resistor from this pin to GND to select the SFT multiplier.
OUT7, 8PPower output. Must be soldered to the output power plane uniformly for proper heat dissipation.
VDD9PController 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.
IN10, 22, 23PPower input. Must be soldered to the input power plane uniformly for proper heat dissipation.
NC11, 17, 21-Do not connect anything to this pin.
DNC12IDo not force a voltage on this pin. Can be left floating or grounded.
FLT13OOpen drain active low fault output. Pull-up this pin to external supply voltage (≤ 5V) with a resistor.

ITIMER

14

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.

TEMP

15

I/O

Analog voltage output for junction temperature. Voltage proportional to internal temperature of the device

EN/UVLO

16

I

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

OVP

18

I

Sets the over-voltage set-point. Connect a resistor divider from VIN to this pin. Do not leave floating.

PGOOD

19

O

Open-drain active high power good output. This pin has weak internal pull-up to internal supply voltage.

SWEN20I/OOpen-drain signal to indicate and control power switch ON/OFF status. This pin has weak internal pull-up to internal supply voltage.
INPowerPad™PPower input. Must be soldered to the input power plane uniformly for proper heat dissipation.
(1) I = Input, O = Output, I/O = Input or Output, G = Ground, P = Power.