ZHCSIY3C March   2019  – August 2019 TPS568230

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用
      2.      效率与输出电流 ECO 模式
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 PWM Operation and D-CAP3 Control
      2. 7.3.2 Soft Start
      3. 7.3.3 Large Duty Operation
      4. 7.3.4 Power Good
      5. 7.3.5 Over Current Protection and Undervoltage Protection
      6. 7.3.6 Over Voltage Protection
      7. 7.3.7 UVLO Protection
      8. 7.3.8 Output Voltage Discharge
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Light Load Operation
      2. 7.4.2 Advanced Eco-mode Control
      3. 7.4.3 Out of Audio Mode
      4. 7.4.4 Force CCM Mode
      5. 7.4.5 Mode Selection
      6. 7.4.6 Standby Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Component Selection
          1. 8.2.2.1.1 Output Voltage Set Point
          2. 8.2.2.1.2 Inductor Selection
          3. 8.2.2.1.3 Output Capacitor Selection
          4. 8.2.2.1.4 Input Capacitor Selection
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 第三方产品免责声明
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 Glossary
  12. 12机械、封装和可订购信息

5 Pin Configuration and Functions

RJE Package
20-Pin VQFN
Top View
TPS568230 pinout-01-slvse32.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
BST 1 I Supply input for the gate drive voltage of the high-side MOSFET. Connect the bootstrap capacitor between BST and SW, 0.1uF is recommended.
VIN 2,3,4,5 P Input voltage supply pin for the control circuitry. Connect the input decoupling capacitors between VIN and GND.
SW 6,19,20 O Switch node terminal. Connect the output inductor to this pin.
GND 7,8,18,Pad G Power GND terminal for the controller circuit and the internal circuitry.
PGOOD 9 O Open drain power good indicator. It is asserted low if output voltage is out of PGOOD threshold, over voltage or if the device is under thermal shutdown, EN shutdown or during soft start.
SS 11 I Soft-start time selection pin. Connecting an external capacitor sets the soft-start time and if no external capacitor is connected, the soft-start time is about 1.3ms.
NC 10,16 Not connect. Can be connected to GND plane for better thermal achieved.
EN 12 I Enable pin of buck converter. EN pin is a digital input pin, decides turn on or off buck converter. Internal pull down current to disable converter if leave this pin open.
AGND 13 G Ground of internal analog circuitry. Connect AGND to GND plane with a short trace.
FB 14 I Converter feedback input. Connect to the center tap of the resistor divider between output voltage and AGND.
MODE 15 I Switching frequency and light load operation mode selection pin. Connect this pin to a resistor divider from VCC and AGND, the different MODE options are shown in Table 1
VCC 17 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.