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

9.4.1 Transient Protection

In case of short circuit and overload current limit, when the device interrupts current flow, input inductance generates a positive voltage spike on the input and output inductance generates a negative voltage spike on the output. The peak amplitude of voltage spikes (transients) depends on the value of inductance in series to the input or output of the device. These transients can exceed Absolute Maximum Ratings of the device if steps are not taken to address the issue.

Typical methods for addressing transients include:

  • Minimizing lead length and inductance into and out of the device
  • Using large PCB GND plane
  • Using a Schottky diode across the output and GND to absorb negative spikes
  • Using low value ceramic capacitor (C(IN) to approximately 0.1μF) to absorb the energy and dampen the transients.

The approximate value of input capacitance can be estimated with Equation 14.

Equation 14. V s p i k e A b s o l u t e = V I N + I L O A D × L I N C I N

where

  • V(IN) is the nominal supply voltage
  • I(LOAD) is the load current
  • L(IN) equals the effective inductance seen looking into the source
  • C(IN) is the capacitance present at the input

Some applications can require additional Transient Voltage Suppressor (TVS) to prevent transients from exceeding Absolute Maximum Ratings of the device. These transients can occur during positive and negative surge tests on the supply lines. In such applications, TI recommends to place at least 1µF of input capacitor.

The circuit implementation with optional protection components (a ceramic capacitor, TVS and Schottky diode) is shown in Figure 9-10.

TPS1663 Circuit Implementation With Optional Protection Components for TPS1663x
* Optional components needed for suppression of transients
Figure 9-10 Circuit Implementation With Optional Protection Components for TPS1663x