ZHCST52A September   2023  – November 2023 TPS7B4256-Q1

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 Tracker Output Voltage (VOUT)
        1. 6.3.1.1 Output Voltage Equal to Reference Voltage
        2. 6.3.1.2 Output Voltage Less Than the Reference Voltage
        3. 6.3.1.3 Output Voltage Larger Than the Reference Voltage
      2. 6.3.2 Reverse Current Protection
      3. 6.3.3 Undervoltage Lockout
      4. 6.3.4 Thermal Protection
      5. 6.3.5 Current Limit
      6. 6.3.6 Output Short to Battery
      7. 6.3.7 Tracking Regulator With an Enable Circuit
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout Operation
      3. 6.4.3 Operation With VIN < 3 V
      4. 6.4.4 Disable With ADJ/EN Control
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Dropout Voltage
      2. 7.1.2 Reverse Current
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input and Output Capacitor Selection
        2. 7.2.2.2 Feedback Resistor Selection
        3. 7.2.2.3 Feedforward Capacitor
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Package Mounting
        2. 7.4.1.2 Board Layout Recommendations to Improve PSRR and Noise Performance
        3. 7.4.1.3 Power Dissipation and Thermal Considerations
        4. 7.4.1.4 Thermal Performance Versus Copper Area
        5. 7.4.1.5 Layout Examples
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
    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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机械数据 (封装 | 引脚)
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6.3.1.2 Output Voltage Less Than the Reference Voltage

Connecting an external resistor divider at the ADJ/EN pin, as shown in Figure 6-3, can help generate an output voltage that is lower than the reference voltage. Both R1 and R2 must be less than 100 kΩ to minimize the error in voltage caused by the ADJ/EN pin leakage current, IADJ/EN. Equation 2 calculates VOUT.

Equation 2. VOUT= VREF  × R2R1+ R2
GUID-20230810-SS0I-HCHC-RPPM-PTG8K9C3W48M-low.svg Figure 6-3 Tracker Output Voltage Lower Than the Reference Voltage
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