This processor supply reference design is an automotive power solution for use in high performance, single-core-voltage application processors in advanced driver assistance systems (ADASs). This design can support core supply currents up to 10 A at 0.9 V. The design can also operate with a wide input voltage range, withstand reverse battery conditions, and support start-stop and cold-crank down to a 3.5-V input with an undisturbed output. All switching frequencies in this solution are above 2 MHz. The design has an inherently lower electromagnetic interference (EMI) and higher efficiency due to the multi-phase configuration and integration of supplies. This reference design also provides results for conducted emissions tests for CISPR 25 Class 5.
Features
- 5A integrated 2.2MHz synchronous wide input voltage buck converter
- Smart diode reverse battery protection for minimum voltage drop (typical 20mV)
- Operating range 3.5 - 36V, supports start-stop and cold-crank
- Interleaved four-phase core-voltage supply minimizing ripple, EMI and inductor size
- Optimized for CISPR 25 Class 5 conducted emissions
- Small switched cap boost for 5V CAN supply reduces solution size and BOM cost