SNVAA71 October   2023 TPSM63610

 

  1.   1
  2.   Using the TPSM63610/08 for Negative Output, Inverting Buck Boost Application
  3.   Trademarks
  4. 1Inverting Buck-Boost Topology
    1. 1.1 Concept
    2. 1.2 VIN and VOUT Range In Inverting Configuration
    3. 1.3 Output Current Calculations
  5. 2Design Considerations
    1. 2.1 Additional Bypass Capacitor and Schottky Diode
    2. 2.2 Start-up Behavior and Switching Node Consideration
  6. 3External Components
    1. 3.1 Capacitor Selection
    2. 3.2 System Loop Stability
    3. 3.3 UVLO
  7. 4Typical Performance
  8. 5Digital Pin Configurations
    1. 5.1 Digital Input Pin (EN)
    2. 5.2 Power-Good Pin
  9. 6Summary
  10. 7References

1.2 VIN and VOUT Range In Inverting Configuration

When configured in an IBB topology, the input voltage across the module from VIN to GND of the device is VIN to |VOUT| effectively limiting the input voltage range from VIN to Ground. The TPSM63610 has an input voltage range from 3.8 V to 36 V + VOUT, where VOUT is a negative value. For example, for an output voltage of –7 V the maximum input voltage is 29 V. The output voltage range in this topology is –1 V to –7 V.