ZHCSL90 August   2020 TPS25980

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     7
  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 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 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 (UVLO and UVP)
      2. 8.3.2 Overvoltage Protection (OVP)
      3. 8.3.3 Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 8.3.3.1 Slew Rate and Inrush Current Control (dVdt)
        2. 8.3.3.2 Circuit Breaker
        3. 8.3.3.3 Short-Circuit Protection
      4. 8.3.4 Overtemperature Protection (OTP)
      5. 8.3.5 Analog Load Current Monitor (IMON)
      6. 8.3.6 Power Good (PG)
      7. 8.3.7 Load Detect/Handshake (LDSTRT)
    4. 8.4 Fault Response
    5. 8.5 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application: Patient Monitoring System in Medical Applications
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Device Selection
        2. 9.2.2.2 Setting the Current Limit Threshold: RILIM Selection
        3. 9.2.2.3 Setting the Undervoltage Lockout Set Point
        4. 9.2.2.4 Choosing the Current Monitoring Resistor: RIMON
        5. 9.2.2.5 Setting the Output Voltage Ramp Time (TdVdt)
          1. 9.2.2.5.1 Case 1: Start-Up Without Load: Only Output Capacitance COUT Draws Current
          2. 9.2.2.5.2 Case 2: Start-Up With Load: Output Capacitance COUT and Load Draw Current
        6. 9.2.2.6 Setting the Load Handshake (LDSTRT) Delay
        7. 9.2.2.7 Setting the Transient Overcurrent Blanking Interval (tITIMER)
        8. 9.2.2.8 Setting the Auto-Retry Delay and Number of Retries
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Optical Module Power Rail Path Protection
        1. 9.3.1.1 Design Requirements
        2. 9.3.1.2 Device Selection
        3. 9.3.1.3 External Component Settings
        4. 9.3.1.4 Voltage Drop
        5. 9.3.1.5 Application Curves
      2. 9.3.2 Input Protection for 12-V Rail Applications: PCIe Cards, Storage Interfaces and DC Fans
  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
        1. 12.1.1.1 Related Links
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 静电放电警告
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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Pin Functions
PINTYPEDESCRIPTION
NAMENO.
OUT17, 18, 19, 20, 21, 22, 23, 24PowerPower Output.
IN1, 2, 3, 16, Pad 1Thermal / PowerPower Input. The exposed pad must be soldered to input power plane uniformly to ensure proper heat dissipation and to maintain optimal current distribution through the device.
GND4, 5, 14,
Pad 2		GroundConnect to System Ground.
EN/UVLO6Analog InputActive High Enable for the device. A resistor divider on this pin from input supply to GND can be used to adjust the Undervoltage Lockout threshold. Do not leave floating.
ITIMER7Analog OutputA capacitor from this pin to GND sets the overcurrent blanking interval during which the output current can temporarily exceed set current limit (but lower than fast-trip threshold) before the device overcurrent response takes action. Leave this pin open for fastest response to overcurrent events. Refer to ITIMER Functional Mode Summary for more details.
ILIM8Analog OutputAn external resistor from this pin to GND sets the output current limit threshold and fast trip threshold. Do not leave floating.
IMON9Analog OutputAnalog output load current monitor. This pin sources a current proportional to the load current. This can be converted to a voltage signal by connecting an appropriate resistor from this pin to GND.
RETRY_DLY10Analog OutputA capacitor from this pin to GND sets the time period that has to elapse after a fault shutdown before the device attempts to restart automatically. Connect this pin to GND for latch-off operation (no auto-retries) after a fault. Refer to Fault Response section for more details.
NRETRY11Analog OutputA capacitor from this pin to GND sets the number of times the part attempts to restart automatically after shutdown due to fault. Connect this pin to GND if the part should retry indefinitely. Refer to Fault Response section for more details.
LDSTRT12Analog InputLoad Detect/Handshake Signal. A capacitor from this pin to GND sets the time period after PG assertion within which the pin has to be pulled low for the device to remain ON. Connect to GND if the load detect/handshake feature is not used. Refer to Load Detect/Handshake (LDSTRT) section for more details. Do not leave floating.
PG13Digital OutputActive High Power Good Indication. This pin is asserted when the FET is fully enhanced and output has reached maximum voltage. It is an open drain output that requires an external pull-up resistor to an external supply. This pin remains logic low when VIN < VUVP.
dVdt15Analog OutputA capacitor from this pin to GND sets the output turn on slew rate. Leave this pin floating for the fastest slew rate during start up.