JAJSEW8E February   2017  – August 2019 TPS61178

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      代表的なアプリケーション
  4. 4 改訂履歴
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Under-voltage Lockout
      2. 8.3.2  Enable and Disable
      3. 8.3.3  Startup
      4. 8.3.4  Load Disconnect Gate Driver
      5. 8.3.5  Adjustable Peak Current Limit
      6. 8.3.6  Output Short Protection (with load disconnected FET)
      7. 8.3.7  Adjustable Switching Frequency
      8. 8.3.8  External Clock Synchronization (TPS611781)
      9. 8.3.9  Error Amplifier
      10. 8.3.10 Slope Compensation
      11. 8.3.11 Start-up with the Output Pre-Biased
      12. 8.3.12 Bootstrap Voltage (BST)
      13. 8.3.13 Over-voltage Protection
      14. 8.3.14 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation
      2. 8.4.2 Auto PFM Mode (TPS61178)
      3. 8.4.3 Forced PWM Mode (TPS611781)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Setting the Switching Frequency
      3. 9.2.3 Setting the Current Limit
      4. 9.2.4 Setting the Output Voltage
        1. 9.2.4.1 Selecting the Inductor
        2. 9.2.4.2 Selecting the Output Capacitors
        3. 9.2.4.3 Selecting the Input Capacitors
        4. 9.2.4.4 Loop Stability and Compensation
          1. 9.2.4.4.1 Small Signal Model
          2. 9.2.4.4.2 Loop Compensation Design Steps
          3. 9.2.4.4.3 Selecting the Disconnect FET
          4. 9.2.4.4.4 Selecting the Bootstrap Capacitor
          5. 9.2.4.4.5 VCC Capacitor
      5. 9.2.5 TPS61178 Application Waveform
    3. 9.3 System Examples
      1. 9.3.1 TPS61178 with 14-V Output from 2.7-V to 4.4-V Input Voltage
      2. 9.3.2 TPS61178 Without Load Disconnect Function
      3. 9.3.3 TPS611781 External Clock Synchronization
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 デバイス・サポート
      1. 12.1.1 デベロッパー・ネットワークの製品に関する免責事項
      2. 12.1.2 開発サポート
        1. 12.1.2.1 WEBENCH®ツールによるカスタム設計
    2. 12.2 ドキュメントのサポート
      1. 12.2.1 関連資料
    3. 12.3 関連リンク
    4. 12.4 ドキュメントの更新通知を受け取る方法
    5. 12.5 コミュニティ・リソース
    6. 12.6 商標
    7. 12.7 静電気放電に関する注意事項
    8. 12.8 Glossary
  13. 13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

9.2.5 TPS61178 Application Waveform

Typical condition VIN = 6 V to 14 V, VOUT = 16 V, RLIMIT = 51.1 kΩ, RFREQ = 348 kΩ

Application waveforms are measured with the inductor 3.3 µH, Würth 74437368033, and the output capacitance: 3 x 22 µF, GRM32ER61E226KE15L plus 2 x 10 µF, GRM188R61E106MA73D.

TPS61178 Steadys_1A_PFM.gif
VIN = 7.2 V VOUT= 16 V
L = 3.3 µH COUT= 86 µF Load = 1000 mA
Figure 26. Steady State 1000 mA
TPS61178 Steady-state-10mA_PFM.gif
VIN = 7.2 V VOUT= 16 V Auto PFM
L = 3.3 µH COUT= 86 µF Load = 10 mA
Figure 27. Steady-state 10 mA
TPS61178 Startup_EN_PFM.gif
VIN = 7.2 V VOUT= 16 V Auto PFM
L = 3.3 µH COUT= 86 µF Load = 32 Ω
Figure 28. Startup by EN
TPS61178 Load_tran.gif
VIN = 7.2 V VOUT= 16 V Load = 500 mA to 2 A,
L = 3.3 µH COUT= 86 µF 0.1 A/µs slew rate
Figure 30. Load Transient
TPS61178 Short_release.gif
VIN = 7.2 V VOUT= 16 V
L = 3.3 µH COUT= 86 µF
Figure 32. Output Short Release (with Disconnect FET)
TPS61178 Shutdown_EN_PFM.gif
VIN = 7.2 V VOUT= 16 V Auto PFM
L = 3.3 µH COUT= 86 µF Load = 32 Ω
Figure 29. Shutdown by EN
TPS61178 Short.gif
VIN = 7.2 V VOUT= 16 V
L = 3.3 µH COUT= 86 µF
Figure 31. Output Short (with Disconnect FET)