This power design is for the Semidrive X9SP automotive system-on-chip (SoC) power rails using the LP87521-Q1, LP87562-Q1, and LP87563-Q1 power management ICs (PMICs). Additional bucks TPS62811-Q1 and TPS628501-Q1 as well as LDOs TPS74501-Q1 and TLV76733-Q1 are used to power other discrete rails not covered by PMICs. This power design assumes an input voltage of 5V (±5%). If the system input voltage is higher, for example a car battery, a buck converter as a pre-regulator needs to be used to generate a supply voltage of 5V. LM25149-Q1 can be used as a pre-regulator when powered directly from car battery. An additional smart diode controller such as LM74700-Q1 can be used to control external MOSFETS and provide power path ON or OFF control and overvoltage protection.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
| Type | Title | Date | ||
|---|---|---|---|---|
| Design guide | Power Supply Design for Semidrive X9SP (X9HP Compatible) Using LP8752-Q1 and LP8756-Q1 (Rev. A) | PDF | HTML | Jan. 02, 2025 |
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