JAJSLL7B February   2023  – March 2024 TPS628301 , TPS628302 , TPS628303 , TPS628304

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information Discrete
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pulse Width Modulation (PWM) Operation
      2. 7.3.2 Power Save Mode (PSM) Operation
      3. 7.3.3 Start-Up and Soft Start
      4. 7.3.4 Switch Cycle-by-Cycle Current Limit
      5. 7.3.5 Short-Circuit Protection
      6. 7.3.6 Undervoltage Lockout
      7. 7.3.7 Thermal Shutdown
      8. 7.3.8 Optimized EMI Performance
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable, Disable, and Output Discharge
      2. 7.4.2 Minimum Duty Cycle and 100% Mode Operation
      3. 7.4.3 Power Good
  9. 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 Setting The Output Voltage
        3. 8.2.2.3 Inductor Selection
        4. 8.2.2.4 Output Capacitor Selection
        5. 8.2.2.5 Input Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Thermal Considerations
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 サード・パーティ製品に関する免責事項
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 サポート・リソース
    4. 9.4 Trademarks
    5. 9.5 静電気放電に関する注意事項
    6. 9.6 用語集
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

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

8.2.2.4 Output Capacitor Selection

The inductor and the output capacitor together provide a low-pass filter. To simplify this process, Table 8-5 outlines possible inductor and capacitor value combinations for most applications. Cells with the (✓) mark represent combinations that are proven for stability by simulation and lab test. additionally, cells with the (+) mark represent combinations that are proven for stability by simulation only. Check further combinations for each individual application.

The DCS-Control scheme of the TPS62830x allows the use of tiny ceramic capacitors. Ceramic capacitors with low ESR values have the lowest output voltage ripple and are recommended. To keep low resistance up to high frequencies and to get narrow capacitance variation with temperature, TI recommends using X7R or X5R dielectrics. At light load currents, the converter operates in Power Save Mode and the output voltage ripple is dependent on the output capacitor value. A larger output capacitors can be used reducing the output voltage ripple. Considering the DC-bias derating the capacitance, the recommended minimum effective output capacitance is 12 µF when using a 0.47-µH or larger inductor. When using a 0.24-µH or lower inductor, the recommended minimum effective output capacitance is 22 µF. Table 8-7 lists recommended capacitors.

Table 8-4 Matrix of Output Capacitor and Inductor Combinations (TPS628301 and TPS628302)
VOUT [V] NOMINAL L [µH](2) NOMINAL COUT [µF](3)
2 × 10 or 22 2 × 22 or 47 100
0.5 ≤ VOUT ≤ 1.8 0.47 ✓(1) ✓ +
1.0 + +
1.8 < VOUT 0.47 ✓(1) +
1.0 + +
Table 8-5 Matrix of Output Capacitor and Inductor Combinations (TPS628303 and TPS628304)
VOUT [V]NOMINAL L [µH](2)NOMINAL COUT [µF](3)
2 × 10 or 222 × 22 or 47100
0.5 ≤ VOUT ≤ 1.80.47✓(1)✓+
0.24+✓+
1.8 < VOUT0.47✓(1)+
0.24✓+
(1) This LC combination is the standard value and recommended for most applications.
(2) Inductor tolerance and current derating is anticipated. The effective inductance can vary by 20% and –30%.
(3) Capacitance tolerance and bias voltage derating is anticipated. The effective capacitance can vary by 20% and –50%.
Table 8-6 List of Recommended Capacitors
NOMINAL CAPACITANCE [µF] VOLTAGE RATING [V] DIMENSIONS [mm] MFR PART NUMBER(1)
10 6.3 2.0 × 1.5 × 1.25 MSASJ21GAB7106MTNA01, Taiyo Yuden
10 10 2.0 × 1.25 × 1.25 C2012X7R1A106K125AC, TDK
10 10 1.6 × 0.8 × 0.8 GRM188Z71A106KA73#, MuRata
10 10 1.6 × 0.8 × 0.8 C1608X5R1A106K080AC, TDK
22 10 2.0 × 1.25 × 1.25 GRM21BZ71A226ME15#, MuRata
22 10 1.6 × 0.8 × 0.8 C1608X5R1A226M080AC, TDK