JAJSLL5 September   2021 TPSM5601R5

PRODUCTION DATA  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 Revision History
  5. 5 Device Comparison Table
  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 Typical Characteristics (VIN = 12 V)
    7. 7.7 Typical Characteristics (VIN = 24 V)
    8. 7.8 Typical Characteristics (VIN = 48 V)
    9. 7.9 Typical Characteristics (VIN = 60 V)
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Adjustable Output Voltage (FB)
      2. 8.3.2 Minimum Input Capacitance
      3. 8.3.3 Minimum Output Capacitance
      4. 8.3.4 Precision Enable (EN), Undervoltage Lockout (UVLO), and Hysteresis (HYS)
      5. 8.3.5 Power Good (PGOOD)
      6. 8.3.6 Spread Spectrum Operation
      7. 8.3.7 Overcurrent Protection (OCP)
      8. 8.3.8 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Active Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Shutdown Mode
  9. 9 Applications 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 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Output Voltage Setpoint
        3. 9.2.2.3 Input Capacitors
        4. 9.2.2.4 Output Capacitor Selection
        5. 9.2.2.5 Power Good Signal
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
      1. 11.2.1 Theta JA Versus PCB Area
      2. 11.2.2 Package Specifications
      3. 11.2.3 EMI
        1. 11.2.3.1 EMI Plots
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 サポート・リソース
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

8.3.4 Precision Enable (EN), Undervoltage Lockout (UVLO), and Hysteresis (HYS)

The EN pin provides precision ON and OFF control for the TPSM5601R5. Once the EN pin voltage exceeds the threshold voltage, the device starts operation. The simplest way to enable the device is to connect EN directly to VIN. This allows the device to start up when VIN is within its valid operating range. An external logic signal can also be used to drive the EN input to toggle the output on and off and for system sequencing or protection. This input must not be allowed to float.

The TPSM5601R5 implements internal undervoltage lockout (UVLO) circuitry on the VIN pin. The device is disabled when the VIN pin voltage is below the internal VIN UVLO threshold. The internal VIN UVLO rising threshold is 3.8 V (typical) with a typical hysteresis of 500 mV.

If an application requires a higher UVLO threshold, the EN input supports adjustable UVLO by connecting a resistor divider from VIN to the EN pin. Applying a voltage greater than or equal to 1.14 V causes the device to enter Standby mode, powering the internal LDO, but not producing an output voltage. Increasing the EN voltage to 1.231 V (typical) fully enables the device, allowing it to enter Start-up mode and start the soft-start period. When the EN input is brought below 1.121 V (110-mV hysteresis), the regulator stops running and enters Standby mode. Further decrease in the EN voltage to below 0.3 V completely shuts down the device.

The TPSM5601R5 utilizes a reference-based soft start that prevents output voltage overshoots and large inrush currents as the regulator is starting up. The rise time of the output voltage is about 4 ms.