This four-phase reference design provides 3.3 VOUT at 24 A from a 3.8-V to 16-V automotive power source. The design uses two LMQ644A2-Q1 dual-channel synchronous buck regulators operating at a nominal switching frequency of 500 kHz. Forced pulse width modulation (FPWM) or pulse frequency modulation (PFM) for light load operation is jumper selectable. Test points are provided for frequency synchronization, power good and frequency response injection.
| Output voltage options | PMP23117.1 |
|---|---|
| Vin (Min) (V) | 3.8 |
| Vin (Max) (V) | 16 |
| Vout (Nom) (V) | 3.3 |
| Iout (Max) (A) | 24 |
| Output Power (W) | 79.2 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Synchronous^Multiphase |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
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Design file that contains information on physical board layer of design PCB
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Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | 3.3-V, 24-A, 4-Phase Reference Design for Automotive Applications | PDF | HTML | Aug. 24, 2023 |
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