SLVA469D June   2013  – January 2023 TLV62130 , TLV62130A , TLV62150 , TLV62150A , TPS61175 , TPS61175-Q1 , TPS62130 , TPS62130A , TPS62131 , TPS62132 , TPS62133 , TPS62135 , TPS62136 , TPS62140 , TPS62140A , TPS62141 , TPS62142 , TPS62143 , TPS62150 , TPS62150A , TPS62151 , TPS62152 , TPS62153 , TPS62160 , TPS62161 , TPS62162 , TPS62163 , TPS62170 , TPS62171 , TPS62172 , TPS62173

 

  1.   Using the TPS6215x in an Inverting Buck-Boost Topology
  2.   Trademarks
  3. 1Inverting Buck-Boost Topology
    1. 1.1 Concept
    2. 1.2 Output Current Calculations
    3. 1.3 VIN and VOUT Range
  4. 2Design Considerations
    1. 2.1 Design Precautions
    2. 2.2 Additional Input Capacitor
    3. 2.3 Digital Pin Configurations
      1. 2.3.1 Digital Input Pins (EN, FSW, DEF)
      2. 2.3.2 Power Good Pin
    4. 2.4 Startup Behavior and Switching Node Consideration
  5. 3External Component Selection
    1. 3.1 Inductor Selection
    2. 3.2 Capacitor Selection
  6. 4Typical Performance
  7. 5Conclusion
  8. 6References
  9. 7Revision History

Typical Performance

The reference design shown in Figure 4-1 was used to generate the typical characteristic graphs presented in this section and illustrated in Figure 4-2 through Figure 4-10.

GUID-D0F16175-88B4-400D-BAE7-A1DEB5008A34-low.gifFigure 4-1 Schematic of the Tested Circuit
GUID-17A8FDD7-A474-4C42-BA9F-23F13196165C-low.gifFigure 4-2 Efficiency vs Load Current with VIN = 12 V
GUID-603AB5D1-CEFC-4223-842A-E0DAFF129CF3-low.gifFigure 4-4 Line Regulation at 500-mA Load
GUID-C884B2D8-E29E-40C5-B1DD-41C7E5F81033-low.gifFigure 4-6 Bode Plot at VIN = 12 V and 500-mA Load
GUID-7F7C0EB8-7C69-44B3-BBE5-7D9E13C2A65B-low.gifFigure 4-8 Shutdown on VIN at 500-mA Load
GUID-D4F2E457-0435-4303-ADE1-1569372954ED-low.gifFigure 4-10 Output Voltage Ripple, VIN = 12 V and IOUT = 500 mA
GUID-F314C2E8-BCB1-4549-8388-00709505686A-low.gifFigure 4-3 Efficiency vs Load Current with VIN = 5 V
GUID-6B2FC3CB-314D-4510-8E5A-1E82B6C343E5-low.gifFigure 4-5 Load Regulation at VIN = 12 V
GUID-0CCC0FD1-5431-4217-9DED-9F51E74DF508-low.gifFigure 4-7 Startup on VIN at 160-mA Load
GUID-E0A25422-FF13-4475-B26A-44B9CFF67115-low.gifFigure 4-9 Load Transient Response, 0 mA to 500 mA with VIN = 12V