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

Typical Performance

Unless otherwise stated, the following conditions apply: VIN = 24 V , TA = 25°C.

GUID-20230816-SS0I-5XPS-XRFT-VKZ7V0WLPNDS-low.svgFigure 4-1 Efficiency
GUID-20230802-SS0I-G0MZ-QGRP-DCVPZTSRNLGS-low.pngFigure 4-3 Start-up with 3-A Load at -12 Vout
GUID-20230927-SS0I-1VFJ-XJVB-4KMHDCM418TS-low.pngFigure 4-5 Load Transient With 2.5-A to 5-A Load Step at -12 Vout
GUID-20230816-SS0I-S7NP-FMLF-KSW0VN0BJWBN-low.svgFigure 4-2 Typical 5-V Output Regulation
GUID-20230802-SS0I-9VBJ-9CBZ-6XZXGGQT2VMK-low.pngFigure 4-4 Shutdown with 3-A Load at -12 Vout
GUID-20230927-SS0I-L05B-GRGT-0S33LLBC0S9M-low.pngFigure 4-6 Output Voltage Ripple with 3-A Load at -12 Vout