JAJSGX3A February   2019  – March 2019 TPS7A16A-Q1

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     代表的なアプリケーションの回路図
  4. 4 改訂履歴
  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 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 Applications
      1. 8.2.1 TPS7A16A-Q1 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
      2. 8.2.2 Automotive Applications
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Device Recommendations
        3. 8.2.2.3 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. 11デバイスおよびドキュメントのサポート
    1. 11.1 ドキュメントの更新通知を受け取る方法
    2. 11.2 コミュニティ・リソース
    3. 11.3 商標
    4. 11.4 静電気放電に関する注意事項
    5. 11.5 Glossary
  12. 12メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

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 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 shown in Equation 1.

Table 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-Q1 or using resistors in the order of hundreds or tens of kΩ.