SLVA478C
October 2013 – November 2022
TPS62120
,
TPS62122
Using the TPS62120 in an Inverting Buck-Boost Topology
Trademarks
1
Inverting Buck-Boost Topology
1.1
Design Considerations
1.2
Concept
1.3
Output Current Calculations
1.4
VIN and VOUT Range
2
Digital Pin Configurations
2.1
Enable Pin
2.2
SGND Pin
2.3
Power Good Pin
3
Startup Behavior and Switching Node Consideration
4
External Component Selection
4.1
Inductor Selection
4.2
Input Capacitor Selection
4.3
Selecting L and COUT for Stability
5
Typical Performance and Waveforms
6
Conclusion
7
References
8
Revision History
7
References
Texas Instruments,
Creating an Inverting Power Supply From a Step-Down Regulator
application note
Texas Instruments,
TPS6213x 3-V to17-V, 3-A Step-Down Converter In 3-mm × 3-mm QFN Package
data sheet
Texas Instruments,
Using a Buck Converter in an Inverting Buck-Boost Topology
analog applications journal
Texas Instruments,
Using the TPS5430 in an Inverting Buck-Boost Topology
application note
Texas Instruments,
Using the TPS6215x in an Inverting Buck Boost Topology
application note
Texas Instruments,
Simplifying Stability Checks
application note
Robert W. Erickson:
Fundamentals of Power Electronics
, Kluwer Academic Publishers, 1997
Texas Instruments,
How to Measure the Control Loop of DCS-Control™ Devices
application note
Texas Instruments, DCS-Control™ Landing Page:
www.ti.com/dcs-control