JAJSH37A August   2019  – August 2019 TPS56C230

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      概略回路図
      2.      効率と出力電流との関係、Eco-mode
  4. 4 改訂履歴
  5. 5 概要（続き）
  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 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  PWM Operation and D-CAP3 Control
      2. 8.3.2  Soft Start
      3. 8.3.3  Large Duty Operation
      4. 8.3.4  Power Good
      5. 8.3.5  Overcurrent Protection and Undervoltage Protection
      6. 8.3.6  Overvoltage Protection
      7. 8.3.7  Out-of-Bounds Operation
      8. 8.3.8  UVLO Protection
      9. 8.3.9  Output Voltage Discharge
      10. 8.3.10 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Light Load Operation
      2. 8.4.2 Eco-mode Control
      3. 8.4.3 Force CCM
      4. 8.4.4 Mode Selection
      5. 8.4.5 Standby Operation
  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 Output Voltage Set Point
        3. 9.2.2.3 MODE Selection
        4. 9.2.2.4 Inductor Selection
        5. 9.2.2.5 Output Capacitor Selection
        6. 9.2.2.6 Input Capacitor Selection
      3. 9.2.3 Application Curves
  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 ドキュメントの更新通知を受け取る方法
    3. 12.3 コミュニティ・リソース
    4. 12.4 商標
    5. 12.5 静電気放電に関する注意事項
    6. 12.6 Glossary
  13. 13メカニカル、パッケージ、および注文情報

6 Pin Configuration and Functions

RJE Package
20-Pin VQFN
Top View
TPS56C230 pinout-01-slvse32.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
BST 1 I Supply input for the gate drive voltage of the high-side MOSFET. Connect the bootstrap capacitor between BST and SW, 0.1 uF is recommended.
VIN 2,3,4,5 P Input voltage supply pin for the control circuitry. Connect the input decoupling capacitors between VIN and PGND.
SW 6,19,20 O Switching node connection to the inductor and bootstrap capacitor for buck. This pin voltage swings from a diode voltage below the ground up to input voltage of buck.
PGND 7,8,18,Pad G Power GND terminal for the controller circuit and the internal circuitry.
PGOOD 9 O Open drain power good indicator. It is asserted low if output voltage is out of PG threshold, over voltage or if the device is under thermal shutdown, EN shutdown or during soft start.
SS 11 I Soft-Start time selection pin. Connecting an external capacitor sets the soft-start time and if no external capacitor is connected, the soft-start time is about 1.2ms.
NC 10,16 Not connect. Can be connected to GND plane for better thermal achieved.
EN 12 I Enable input of buck converter
AGND 13 G Ground of internal analog circuitry. Connect AGND to GND plane with a short trace.
FB 14 I Feedback sensing pin for Buck output voltage. Connect this pin to the resistor divider between output voltage and AGND.
MODE 15 I Light load operation mode selection pin. Connect this pin to a resistor divider from VCC and AGND for different MODE options shown in Table 1
VCC 17 O The driver and control circuits are powered from this voltage. Decouple with a minimum 1 μF ceramic capacitor as close to VCC as possible.