JAJSE92B November   2017  – April 2018 TPSM84824

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
    1.     概略回路図
  3. 3 概要
    1.     過渡応答
  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 Switching Characteristics
    7. 6.7 Typical Characteristics (VIN = 12 V)
    8. 6.8 Typical Characteristics (VIN = 5 V)
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Adjusting the Output Voltage
      2. 7.3.2  Switching Frequency (RT)
      3. 7.3.3  Synchronization (CLK)
      4. 7.3.4  Output On/Off Enable (EN)
      5. 7.3.5  Input Capacitor Selection
      6. 7.3.6  Output Capacitor Selection
      7. 7.3.7  TurboTrans (TT)
        1. 7.3.7.1 Low-ESR Output Capacitors
        2. 7.3.7.2 Transient Response
          1. 7.3.7.2.1 Transient Waveforms (VIN = 12 V)
      8. 7.3.8  Undervoltage Lockout (UVLO)
      9. 7.3.9  Soft Start (SS/TR)
      10. 7.3.10 Sequencing (SS/TR)
      11. 7.3.11 Power Good (PGOOD)
      12. 7.3.12 Safe Start-up into Pre-Biased Outputs
      13. 7.3.13 Overcurrent Protection
      14. 7.3.14 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode
      2. 7.4.2 Shutdown Mode
  8. 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 Output Voltage Setpoint
        3. 8.2.2.3 Setting the Switching Frequency
        4. 8.2.2.4 Input Capacitors
        5. 8.2.2.5 Output Capacitors
        6. 8.2.2.6 TurboTrans Resistor
        7. 8.2.2.7 Application Waveforms
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 EMI
      1. 10.3.1 EMI Plots
    4. 10.4 Package Specifications
  11. 11デバイスおよびドキュメントのサポート
    1. 11.1 デバイス・サポート
      1. 11.1.1 デベロッパー・ネットワークの製品に関する免責事項
      2. 11.1.2 開発サポート
        1. 11.1.2.1 WEBENCH®ツールによるカスタム設計
    2. 11.2 ドキュメントの更新通知を受け取る方法
    3. 11.3 コミュニティ・リソース
    4. 11.4 商標
    5. 11.5 静電気放電に関する注意事項
    6. 11.6 Glossary
  12. 12メカニカル、パッケージ、および注文情報

7.3.7.2 Transient Response

The TPSM84824 transient response is listed in Table 8 for several common output voltages with different capacitor combinations. The calculated RTT value is included in the table along with the typical voltage deviation for a 2 A and 4 A load step. All data was taken at the recommended switching frequency for each output voltage.

Table 8. Output Voltage Transient Response

VIN = 12 V, CIN1 = 2x 10 µF Ceramic, CIN2 = 100 µF Electrolytic, TA = 25°C
VOUT(V) COUT1 Ceramic COUT2 BULK RTT (kΩ) VOLTAGE DEVIATION
2 A LOAD STEP 4 A LOAD STEP
0.8(1) 300 µF 220 µF 3.4 22 mV . (2.7%) 45 mV . (5.6%)
400 µF 330 µF 5.36 18 mV . (2.2%) 36 mV . (4.5%)
1(1) 200 µF - 2.00 30 mV . (3.0%) 60 mV . (6%)
200 µF 220 µF 3.01 22 mV . (2.2%) 45 mV . (4.5%)
400 µF - 6.04 21 mV . (2.1%) 43 mV . (4.3%)
400 µF 220 µF 5.49 20 mV . (2.0%) 40 mV . (4%)
1.2(1) 200 µF - 3.40 35 mV . (2.9%) 70 mV . (5.8%)
200 µF 220 µF 4.02 27 mV . (2.3%) 55 mV . (4.6%)
400 µF - 8.87 22 mV . (1.8%) 44 mV . (3.7%)
400 µF 220 µF 6.98 18 mV . (1.5%) 36 mV . (3%)
1.8(1) 100 µF - 3.40 56 mV . (3.1%) 120 mV . (6.7%)
300 µF - 14.3 22 mV . (1.2%) 45 mV . (2.5%)
100 µF 220 µF 4.87 24 mV . (1.3%) 52 mV . (2.9%)
3.3(2) 100 µF - 8.66 60 mV . (1.8%) 122 mV . (3.7%)
100 µF 220 µF 31.6 32 mV . (1.0%) 60 mV . (1.8%)
200 µF - 19.1 43 mV . (1.3%) 81 mV . (2.5%)
5(2) 100 µF - 10.0 83 mV . (1.7%) 162 mV . (3.2%)
100 µF 220 µF 31.6 32 mV . (0.6%) 60 mV . (1.2%)
200 µF - 22.1 48 mV . (1.0%) 90 mV . (1.8%)
7.5(2) 100 µF - 10.5 112 mV . (1.5%) 212 mV . (2.8%)
47 µF 220 µF 28.0 36 mV . (0.5%) 72 mV . (1%)
(1) Load step slew rate of 2 A/µs
(2) Load step slew rate of 1 A/µs