ZHCSO68 March   2022 TPS629203

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
  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 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 Mode Selection and Device Configuration (MODE/S-CONF Pin)
      2. 8.3.2 Adjustable VO Operation (External Voltage Divider)
      3. 8.3.3 Selectable VO Operation (VSET and Internal Voltage Divider)
      4. 8.3.4 Smart Enable with Precise Threshold
      5. 8.3.5 Power Good (PG)
      6. 8.3.6 Output Discharge Function
      7. 8.3.7 Undervoltage Lockout (UVLO)
      8. 8.3.8 Current Limit and Short Circuit Protection
      9. 8.3.9 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Forced Pulse Width Modulation (PWM) Operation
      2. 8.4.2 Power Save Mode Operation (Auto PFM/PWM)
      3. 8.4.3 AEE (Automatic Efficiency Enhancement)
      4. 8.4.4 100% Duty-Cycle Operation
      5. 8.4.5 Starting into a Prebiased Load
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Programming the Output Voltage
        3. 9.2.2.3 External Component Selection
          1. 9.2.2.3.1 Output Filter and Loop Stability
          2. 9.2.2.3.2 Inductor Selection
          3. 9.2.2.3.3 Capacitor Selection
            1. 9.2.2.3.3.1 Output Capacitor
            2. 9.2.2.3.3.2 Input Capacitor
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1 Powering Multiple Loads
      2. 9.3.2 Inverting Buck-Boost (IBB)
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
      1. 11.2.1 Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方产品免责声明
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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8.3.1 Mode Selection and Device Configuration (MODE/S-CONF Pin)

The MODE/S-CONF pin is an input with two functions. It can be used to customize the device behavior in two ways:

  • Select the device mode (forced PWM or auto PFM/PWM operation) traditionally with a HIGH or LOW level.
  • Select the device configuration (switching frequency, internal and external feedback, output discharge, and PFM/PWM mode) by connecting a single resistor to this pin.

The device interprets this pin during its start-up sequence after the internal OTP readout and before it starts switching in soft start. If the device reads a HIGH or LOW level, dynamic mode change is active and PFM/PWM mode can be changed during operation. If the device reads a resistor value, there is no further interpretation during operation and the device mode or other configurations cannot be changed afterward.

GUID-20210614-CA0I-LXCZ-MHP0-RTC03TBDSZNB-low.gif Figure 8-1 Interpretation of S-CONF and VSET Flow
Table 8-1 Smart-CONFIG Setting Table
# M ODE/S-CONF Level Or Resistor Value [Ω] (1) FB/VSET Pin FSW (MHz) Output Discharge Mode (Auto Or Forced PWM) Dynamic Mode Change
Setting Options by Level
1 GND external FB up to 2.5(2) yes Auto PFM/PWM with AEE Active
2 HIGH (> 1.8 V) external FB 2.5 yes Forced PWM
Setting Options by Resistor
3 7.50 k external FB up to 2.5(2) no Auto PFM/PWM with AEE not active
4 9.31 k external FB 2.5 no Forced PWM
5 11.50 k external FB 1 yes Auto PFM/PWM
6 14.30 k external FB 1 yes Forced PWM
7 17.80 k external FB 1 no Auto PFM/PWM
8 22.10 k external FB 1 no Forced PWM
9 27.40 k VSET up to 2.5(2) yes Auto PFM/PWM with AEE
10 34.00 k VSET 2.5 yes Forced PWM
11 42.20 k VSET up to 2.5(2) no Auto PFM/PWM with AEE
12 52.30 k VSET 2.5 no Forced PWM
13 64.90 k VSET 1 yes Auto PFM/PWM
14 80.60 k VSET 1 yes Forced PWM
15 100.00 k VSET 1 no Auto PFM/PWM
16 124.00 k VSET 1 no Forced PWM
(1) E96 Resistor Series, 1% accuracy, temperature coefficient better or equal than ±200 ppm/°C
(2) FSW varies based on VIN and VOUT. See Section 8.4.3 for more details.