Intermediate Bus Converters
What an IBC does, how 4:1 stages work, and which devices sit in the power stage.
An intermediate bus converter sits between the rack bus and point-of-load regulators, stepping 48 V or HVDC down to a lower rail for VRMs.
Component Requirements
How Intermediate Bus Converters breaks into device functions and selection parameters.
| System function | Typical devices | Key parameters | Browse |
|---|---|---|---|
| Power stage Primary and synchronous switches. | MOSFET or GaN | FOM, Qgd, thermals | View category |
| Gate drive High-frequency drive and isolation. | Gate drivers | Drive current, delay, isolation | View category |
| Control Fixed-ratio or regulated control. | Digital or analog controllers | Ratio, telemetry, protection | View category |
Design & Selection Considerations
Efficiency
Compare RDS(on), Qg, Qgd, and converter efficiency at the actual bus voltage and load current.
Power density
Package size, thermal resistance, and top- or dual-side cooling decide how close devices can sit to a GPU or bus converter.
Dynamic load
VRM and IBC stages must recover from GPU load steps without overshoot that trips protection.
Supply continuity
Check lifecycle, second source, and lead time before locking a MOSFET or controller.
Engineer and Procurement Paths
Use the same application page to select parts or to source a BOM.
Architecture to datasheet
Review the system blocks, selection parameters, and recommended component types for Intermediate Bus Converters.
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Stock and lead-time check
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Date-code verification
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Obsolete and hard-to-find parts
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BOM-level sourcing
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Frequently Asked Questions
It is the converter between the rack or shelf bus and the lower-voltage rails that feed point-of-load regulators.
The output is nominally one quarter of the input, for example 48 V toward 12 V, often without tight regulation.
Power MOSFETs or GaN switches, gate drivers, a controller, magnetics-adjacent power components, and protection.