ZHCSPP1 May   2022 TPS7A16A

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 Enable (EN)
      2. 7.3.2 Regulated Output (VOUT)
      3. 7.3.3 PG Delay Timer (DELAY)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power-Good
        1. 7.4.1.1 Power-Good Delay and Delay Capacitor
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 TPS7A16A Circuit as an Adjustable Regulator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Adjustable Voltage Operation
            1. 8.2.1.2.1.1 Resistor Selection
          2. 8.2.1.2.2 Capacitor Recommendations
          3. 8.2.1.2.3 Input and Output Capacitor Requirements
          4. 8.2.1.2.4 Feed-Forward Capacitor (Only for Adjustable Version)
          5. 8.2.1.2.5 Transient Response
        3. 8.2.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Additional Layout Considerations
      2. 10.1.2 Power Dissipation
      3. 10.1.3 Thermal Considerations
    2. 10.2 Layout Examples
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
    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
    1. 12.1 Mechanical Data

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
8.2.1.2.1.1 Resistor Selection

Use resistors in the order of MΩ to keep the overall quiescent current of the system as low as possible (by making the current used by the resistor divider negligible compared to the quiescent current of the device).

If greater voltage accuracy is required, take into account the voltage offset contributions as a result of feedback current and use 0.1% tolerance resistors.

Table 8-2 shows the resistor combination to achieve an output for a few of the most common rails using commercially available 0.1% tolerance resistors to maximize nominal voltage accuracy, while adhering to the formula in Equation 1.

Table 8-2 Selected Resistor Combinations
VOUT R1 R2 VOUT / (R1 + R2) « IQ NOMINAL ACCURACY
1.194 V 0 Ω ∞ 0 μA ±2%
1.8 V 1.18 MΩ 2.32 MΩ 514 nA ±(2% + 0.14%)
2..5 V 1.5 MΩ 1.37 MΩ 871 nA ±(2% + 0.16%)
3.3 V 2 MΩ 1.13 MΩ 1056 nA ±(2% + 0.35%)
5 V 3.4 MΩ 1.07 MΩ 1115 nA ±(2% + 0.39%)
10 V 7.87 MΩ 1.07 MΩ 1115 nA ±(2% + 0.42%)
12 V 14.3 MΩ 1.58 MΩ 755 nA ±(2% + 0.18%)
15 V 42.2 MΩ 3.65 MΩ 327 nA ±(2% + 0.19%)
18 V 16.2 MΩ 1.15 MΩ 1038 nA ±(2% + 0.26%)

Close attention must be paid to board contamination when using high-value resistors; board contaminants can significantly impact voltage accuracy. If board cleaning measures cannot be ensured, consider using a fixed-voltage version of the TPS7A16A or using resistors in the order of hundreds or tens of kΩ.