This reference design describes a four-phase interleaved buck converter. Using LM5137F-Q1 as a controller enables the converter with three options for functional safety: Capable, ASIL B and ASIL D. The converter operates over a wide range of 6.5V to 36V to deliver 4.5V regular outputs with better than 1% set-point accuracy at load currents up to 42A per output. The converter applies dynamic phase shedding for 81% efficiency at 15mA per output and also can achieve ±8.3% output voltage vibration when output current jumps from 21A to 86A in 1μs.
| Output voltage options | PMP41158.1 |
|---|---|
| Vin (Min) (V) | 8 |
| Vin (Max) (V) | 18 |
| Vout (Nom) (V) | 4.5 |
| Iout (Max) (A) | 83 |
| Output Power (W) | 373.5 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Multiphase |
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 450W Four-Phase Interleave Buck Converter Reference Design | PDF | HTML | May 20, 2025 |
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