SLVSET9G September   2018  – April 2026 TPS1663

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 Timing Requirements
    7. 6.7 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Hot Plug-In and In-Rush Current Control
        1. 8.3.1.1 Thermal Regulation Loop
      2. 8.3.2  Undervoltage Lockout (UVLO)
      3. 8.3.3  Overvoltage Protection (OVP)
      4. 8.3.4  Overload and Short Circuit Protection
        1. 8.3.4.1 Overload Protection
        2. 8.3.4.2 Short Circuit Protection
          1. 8.3.4.2.1 Start-Up With Short-Circuit On Output
      5. 8.3.5  Output Power Limiting, PLIM (TPS16632 and TPS16637)
      6. 8.3.6  Current Monitoring Output (IMON)
      7. 8.3.7  FAULT Response (FLT)
      8. 8.3.8  Power Good Output (PGOOD)
      9. 8.3.9  IN, P_IN, OUT and GND Pins
      10. 8.3.10 Thermal Shutdown
      11. 8.3.11 Low Current Shutdown Control (SHDN)
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Programming the Current-Limit Threshold R(ILIM) Selection
        2. 9.2.2.2 Undervoltage Lockout and Overvoltage Set Point
        3. 9.2.2.3 Setting Output Voltage Ramp Time (tdVdT)
          1. 9.2.2.3.1 Support Component Selections RPGOOD and C(IN)
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Simple 24V Power Supply Path Protection
    4. 9.4 Power Supply Recommendations
      1. 9.4.1 Transient Protection
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.6 Current Monitoring Output (IMON)

The TPS1663x devices feature an accurate analog current monitoring output. A current source at IMON terminal is internally configured to be proportional to the current flowing from IN to OUT. This current can be converted into a voltage using a resistor R(IMON) from IMON terminal to GND terminal. The IMON voltage can be used as a means of monitoring current flow through the system. The maximum voltage (V(IMONmax)) for monitoring the current is limited to 4V. This limitation puts a limitation on maximum value of R(IMON) resistor and is determined by Equation 9.

Equation 9. V I M O N = I O U T × G A I N I M O N × R I M O N

Where,

  • GAIN(IMON) is the gain factor I(IMON):I(OUT) = 27.9μA/A (typical)
  • I(OUT) is the load current

Refer to Figure 6-9 for IMON output versus load current plot. Figure 8-12 illustrates IMON performance.

TPS1663 IMON Response During a Load StepFigure 8-12 IMON Response During a Load Step

The IMON pin must not have a bypass capacitor to avoid delay in the current monitoring information.