SBVU075 April   2022

 

  1.   Trademarks
  2. 1Introduction
  3. 2Setup
    1. 2.1 LDO Input and Output Connector Descriptions
      1. 2.1.1 VIN and GND
      2. 2.1.2 VOUT and GND
      3. 2.1.3 J3
      4. 2.1.4 J4 (EN)
      5. 2.1.5 J5 (CP_EN)
      6. 2.1.6 J1 (PG)
    2. 2.2 Optional Load Transient Input and Output Connector Descriptions
      1. 2.2.1 VCC and GND
      2. 2.2.2 J17
      3. 2.2.3 TP10
      4. 2.2.4 IN1
      5. 2.2.5 J15
      6. 2.2.6 TP11 and TP12
      7. 2.2.7 J6 and TP13
    3. 2.3 TPS7A57 LDO Operation
    4. 2.4 Optional Load Transient Circuit Operation
  4. 3Board Layout
  5. 4TPS7A57EVM-056 Schematics
  6. 5Bill of Materials

2.1.5 J5 (CP_EN)

J5 (CP_EN) is a 3-pin header used to enable or disable the internal charge pump of the TPS7A57.

The center pin of the 3-pin header is tied to the TPS7A57 CP_EN input. When the 2-pin shunt is placed across the bottom two pins of the header, VIN is shorted to CP_EN, and the internal charge pump is enabled. When the 2-pin shunt is placed across the top two pins of the header, GND is shorted to CP_EN, and the internal charge pump is disabled.

The CP_EN is shorted to GND as default. Short CP_EN to GND if an external VBIAS is applied.

For more information regarding the use of CP_EN and the internal charge pump, see the TPS7A57 data sheet.