Reference Designs
Wide Vin LM3481 SEPIC Conv Provides Regulated 5V in Automotive Start-Stop App Reference Design
Texas Instruments
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
Features
- 100% duty cycle capability
- 5V to 42V Input
- 5V output at 3.25A (LM3481 output)
- 1.1V output at 2A (TLV62065)
- 3.3V output at 1A (TLV62065)
- This example design is supported with design and test files
Featured products
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | DP83TC811-Q1 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | UCC15240-Q1 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | TMP1827 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | SN74AHC1G02-Q1 |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | DLP301S |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
| Manufacturer: | Texas Instruments |
|---|---|
| Part Family: | TMUXHS221LV |
| Status: | ACTIVE |
| ROHS: | Y |
| PB Free: | Y |
