ZHCSLD3B May   2020  – December 2023 TPS566231 , TPS566238

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  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 PWM Operation and D-CAP3™ Control Mode
      2. 6.3.2 Soft Start
      3. 6.3.3 Power Good
      4. 6.3.4 Large Duty Operation
      5. 6.3.5 Overcurrent Protection and Undervoltage Protection
      6. 6.3.6 Overvoltage Protection
      7. 6.3.7 UVLO Protection
      8. 6.3.8 Output Voltage Discharge
      9. 6.3.9 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Advanced Eco-mode Control
      2. 6.4.2 Force CCM Mode
      3. 6.4.3 Standby 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 Custom Design with WEBENCH® Tools
        2. 7.2.2.2 Output Voltage Setpoint
        3. 7.2.2.3 Inductor Selection
        4. 7.2.2.4 Output Capacitor Selection
        5. 7.2.2.5 Input 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 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Custom Design with WEBENCH® Tools
    2. 8.2 接收文档更新通知
    3. 8.3 支持资源
    4. 8.4 Trademarks
    5. 8.5 静电放电警告
    6. 8.6 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

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4 Pin Configuration and Functions

GUID-F9B6BD25-253A-4328-936E-8D0F62FB7AF7-low.gifFigure 4-1 TPS566231, TPS566238 9-Pin
RQF, VQFN-HR Package (Top View)
GUID-20210106-CA0I-VQSF-MDDS-JBF0PHGHLZZP-low.gifFigure 4-2 TPS566231P, TPS566238P 9-Pin
RQF, VQFN-HR Package (Top View)
Table 4-1 Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
VCC 1 O 5.0-V internal VCC LDO output. This pin supplies voltage to the internal circuitry and gate driver. Bypass this pin with a 1-μF capacitor. If VVIN is lower than 5 V, VCC follows the VIN voltage.
FB 2 I Converter feedback input. Connect to the center tap of the resistor divider between output voltage and ground.
EN 3 I Enable pin of buck converter. The EN pin is a digital input pin, so the pin decides to turn on or turn off the buck converter. If the EN pin is open, the internal pullup current occurs to enable converter.
PGND 4 G Ground pin. Power ground return for the switching circuit. Connect sensitive SS and FB returns to PGND at a single point.
VIN 5, 6 P Input voltage supply pin. Connect the input decoupling capacitors between VIN and PGND.
BST 7 O Supply input for the gate drive voltage of the high-side MOSFET. Connect the bootstrap capacitor between BST and SW. TI recommends 0.1 μF.
SW 8 O Switch node terminal. Connect the output inductor to this pin.
SS/PG 9 O TPS566231 and TPS566238 soft-start control pin. Connecting an external capacitor sets the soft-start time.
O TPS566231P and TPS566238P open-drain power good indicator. This pin is asserted low if output voltage is out of PG threshold, over voltage, or if the device is under thermal shutdown, EN shutdown, or during soft start.