ZHCSNA2 October   2021 TPS563212

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Advanced Emulated Current Mode Control
      2. 7.3.2 Mode Selection and PG/SS Pin Function Configuration
      3. 7.3.3 Power Good (PG)
      4. 7.3.4 Soft Start and Pre-Biased Soft Start
      5. 7.3.5 Output Discharge Through PG/SS Pin
      6. 7.3.6 Precise Enable and Adjusting Undervoltage Lockout
      7. 7.3.7 Overcurrent Limit and Undervoltage Protection
      8. 7.3.8 Overvoltage Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Active Mode
      3. 7.4.3 FCCM Operation
      4. 7.4.4 CCM Operation
      5. 7.4.5 DCM Operation and Eco-mode Operation
      6. 7.4.6 On-Time Extension for Large Duty Cycle 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 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Output Voltage Resistors Selection
        3. 8.2.2.3 Output Inductor Selection
        4. 8.2.2.4 Output Capacitor Selection
        5. 8.2.2.5 Input Capacitor Selection
        6. 8.2.2.6 Bootstrap Capacitor Selection
        7. 8.2.2.7 Undervoltage Lockout Set Point
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 第三方产品免责声明
      2. 11.1.2 Development Support
        1. 11.1.2.1 Custom Design With WEBENCH® Tools
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5 Pin Configuration and Functions

GUID-001D134D-B508-4444-BC49-85385B76E947-low.gif8-Pin SOT-5X3 DRL Package (Top View)
Table 5-1 Pin Functions
PIN I/O(1) DESCRIPTION
NAME NO.
PG/SS 1 I/O This pin can be selected as a power-good function or soft-start function depending on device MODE pin configuration.
  • If the power-good function is selected, this is an open-drain power-good indicator.
  • If the soft-start function is selected, an external capacitor connected from this pin to GND defines the rise time for the internal reference voltage.
VIN 2 P Input voltage supply pin for the control circuitry. Connect the input decoupling capacitors between VIN and GND.
SW 3 P Switch node terminal. Connect the output inductor to this pin.
GND 4 G GND terminal for the controller circuit and the internal circuitry
BOOT 5 P Supply input for the high-side MOSFET gate drive circuit. Connect a 0.1-µF capacitor between the BOOT and SW pins.
EN 6 I/O Enable input control. Driving EN high or leaving this pin floating enables the converter. An external resistor divider can be used to imply an adjustable VIN UVLO function.
MODE 7 I/O Device operation mode in light load (Eco-mode operation or FCCM operation) and pin 1 function (PG/SS) selection pin. Connect a resistor from MODE to GND to configure the device according to Table 7-1.
FB 8 I Converter feedback input. Connect this pin to the output voltage with a feedback resistor divider.
(1) I = Input, I/O = Input or Output, G = Ground, P = Power