This multioutput supply powers a custom ASIC out of 5-V input voltage via multichannel IC (PMIC) LP87653-Q1. Despite this PMIC having four rails, phase three is unused and 1.1 VA (where A equals analog for sensitive loads) is generated via low-dropout regulator (LDO) on customer demand. The LDO used for 2.5 VA and 1.1 VA is TPS745-Q1. Both LDOs are powered out of 3.3 V to lower the losses of the LDO 1.1 VA, and two power resistors are added to the input.
| Output voltage options | PMP30819.1 | PMP30819.2 | PMP30819.3 |
|---|---|---|---|
| Vin (Min) (V) | 5 | 5 | 5 |
| Vin (Max) (V) | 5 | 5 | 5 |
| Vout (Nom) (V) | 1.1 | 2.5 | 1.1 |
| Iout (Max) (A) | 6 | .3 | .4 |
| Output Power (W) | 6.6 | .75 | .44 |
| Isolated/Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated |
| Input Type | DC | DC | DC |
| Topology | Buck- Integrated Switch^Buck- Synchronous | Linear Regulator | Linear Regulator |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | Automotive Power Supply Reference Design With Three Outputs Using PMIC and LDOs | PDF | HTML | Jul. 13, 2022 |
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