JAJSQU6A January   2024  – June 2024 TPS56837H

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  The Adaptive On-Time Control and PWM Operation
      2. 6.3.2  Mode Selection
      3. 6.3.3  Eco-mode Control Scheme
      4. 6.3.4  Soft Start and Prebiased Soft Start
      5. 6.3.5  Enable and Adjusting Undervoltage Lockout
      6. 6.3.6  Output Overcurrent Limit and Undervoltage Protection
      7. 6.3.7  Overvoltage Protection
      8. 6.3.8  UVLO Protection
      9. 6.3.9  Thermal Shutdown
      10. 6.3.10 Output Voltage Discharge
      11. 6.3.11 Power Good
      12. 6.3.12 Large Duty Operation
    4. 6.4 Device Functional Modes
      1. 6.4.1 Standby Operation
      2. 6.4.2 Light Load Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Output Voltage Resistors Selection
        2. 7.2.2.2 Output Filter Selection
        3. 7.2.2.3 Input Capacitor Selection
        4. 7.2.2.4 Bootstrap Capacitor Selection
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 ドキュメントの更新通知を受け取る方法
    3. 8.3 サポート・リソース
    4. 8.4 Trademarks
    5. 8.5 静電気放電に関する注意事項
    6. 8.6 用語集
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.1 Overview

The TPS56837H and TPS56837HA are 8A synchronous buck converters operating from 4.5V to 28V input voltage (Vin). The devices output voltage range from 4V to 22V (Vout) and support 5V, 9V, 15V, 20V dynamic change for USB Power Delivery (USB PD) application.

The proprietary D-CAP3 control mode enables low external component count, ease of design, optimization of the power design for power, size and efficiency. The devices employ D-CAP3 control mode that provides fast transient response with no external compensation components and an accurate feedback voltage. The control topology provides seamless transition between CCM operating mode at higher load condition and DCM operation at lighter load condition. Eco-mode allows the TPS56837H and TPS56837HA to maintain high efficiency at light load. The TPS56837H and TPS56837HA are able to adapt both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.

The TPS56837H and TPS56837HA switching frequencies (Fsw) are fixed 500kHz. There are three selectable current limits (ILIM-1, ILIM, ILIM+1). All of these options are configured by connecting right MODE resistor between MODE and AGND pin.

The EN pin has an internal pullup current that can be used to adjust the input voltage undervoltage lockout (UVLO) with two external resistors. In addition, the EN pin can be floating for the device to operate with the internal pullup current. Soft-start time can be set by connecting a capacitor to the SS pin. Do not leave the SS pin floating. The TPS56837H and TPS56837HA have PG pin to indicate output status. TPS56837H has a built-in discharge function by using an integrated MOSFET with 200Ω RDS(on) and TPS56837HA disables output discharge function. The devices are protected from output short, undervoltage, overvoltage and overtemperature conditions.