In today’s start-stop systems, it is common for battery voltages to dip well below the nominal 12V rating. PMP8903 represents a very common start-stop application where that battery voltage can drop as low as 5V, and a 5V output is still needed for CAN and also as an intermediate bus. This design also features two tiny synchronous low-voltage buck regulators generating 3.3V and 1.1V from the 5V intermediate rail, contributing to an overall solution size that is very compact for space-constrained automotive environments. For an additional output voltage version of the design, see PMP8903.2
| Output voltage options | PMP8903.1 | PMP8903.2 | PMP8903.3 |
|---|---|---|---|
| Vin (Min) (V) | 5 | 4.5 | 4.5 |
| Vin (Max) (V) | 42 | 5.5 | 5.5 |
| Vout (Nom) (V) | 5 | 3.3 | 1.1 |
| Iout (Max) (A) | 3.25 | 1 | 2 |
| Output Power (W) | 16.25 | 3.3 | 2.2 |
| Isolated/Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated |
| Input Type | DC | DC | DC |
| Topology | Sepic- CCM | Buck- Synchronous | Buck- Synchronous |
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
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | PMP8903 Test Results | May 22, 2013 |
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