L4978 DC-DC Switching Converters by STMicroelectronics
2A Step down switching regulator
| Status: | Active |
|---|---|
| Series: | L4978 |
| RoHS: | Compliant |
Where to Buy
Prices starting from US$1.76
| Distributor | Stock | ||
|---|---|---|---|
|
Farnell
from US$2.15
|
2,906
in stock
|
Buy Now |
|
Newark Electronics
from US$2.43
|
2,914
in stock
|
Buy Now |
|
element14
from US$2.42
|
2,906
in stock
|
Buy Now |
|
Transfer Multisort Elektronik
from US$3.19
|
283
in stock
|
Buy Now |
|
Micros
from US$3.38
|
100
in stock
|
Buy Now |
|
Avnet Silica
-
|
700
in stock
|
Buy Now |
|
Future Electronics
from US$1.96
|
-
|
Buy Now |
|
Avnet America
from US$2.09
|
-
|
Buy Now |
|
|
Avnet Asia
from US$1.76
|
-
|
Buy Now |
|
EBV Elektronik
-
|
-
|
Buy Now |
Features
| PROTECTION AGAINST FEEDBACK DISCONNECTION |
| INHIBIT FOR ZERO CURRENT CONSUMPTION |
| SOFT START FUNCTION |
| THERMAL SHUTDOWN |
| ZERO LOAD CURRENT OPERATION |
| VOLTAGE FEEDFORWARD |
| UP TO 2A STEP DOWN CONVERTER |
| PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE |
| OPERATING INPUT VOLTAGE FROM 8V TO 55V |
| SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz |
| INTERNAL CURRENT LIMITING (PULSE-BYPULSE AND HICCUP MODE) |
| OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V |
Resources
Product Specifications |
|---|
| DS1309 2A step down switching regulator |
Application Notes |
|---|
| AN1061 Designing with L4978, 2A high efficiency DC-DC convertery |
Technical Notes & Articles |
|---|
| TN1224 Mounting instructions for SMD (surface mounting device) packages |
Design Notes & Tips |
|---|
| DN0011 ST1S03 alternative topology: Using a buck in a negative buck-boost configuration |
Brochures |
|---|
| Electric vehicle (EV) ecosystem |
Alternative Descriptions
| Dc/Dc Conv, Buck, 300Khz, 150Deg C | Newark Electronics |
| IC, BUCK REG, 4978, DIP8 | element14 |
| IC: driver | Transfer Multisort Elektronik |
| Step-Down Switching Regulator, 2A, Vin 8÷55V, Vout 3.3÷50V, 100kHz | Micros |
| Conv DC-DC Single Step Down 8V to 55V 8-Pin PDIP | Avnet Silica |
| PDIP 08 .3 CU .25 AU W. | Future Electronics |
Frequently Asked Questions
Where can I find additional details, specifications and documents for a L4978?
Additional datasheets, footprints and schematics for L4978 are listed on our Part Details page. You can also find images and similar parts to L4978 on this page.
What pricing and inventory information can I view?
Distributor pricing and stock information is available for L4978 on our Product Comparison page. Access via the 'View Pricing & Stock' button to view L4978 price breaks, MOQs, lead times, inventory and SKUs from distributors.
What category does L4978 fall under?
The L4978 is listed under Power Management > DC-DC Switching Converters > Buck Regulators.
Can I view similar or alternative parts?
You can view similar parts to L4978 when available in the Buck Regulators range under the specifications section at the bottom of the details page.
Who can I contact for technical support of the product?
Submit any questions directly to the customer support team of the distributor listing the product. For the L4978 you can contact the distributor directly for product support, shipping queries etc.
Is the L4978 RoHS compliant?
Yes. This part has been flagged as RoHS Compliant by STMicroelectronics.
Which authorised distributors for L4978 have stock available?
Authorised distributors including Newark Electronics, element14, Farnell, Transfer Multisort Elektronik and Micros have stock available or on a lead time for L4978.
How do I check stock and lead times for all distributors?
Stock availability and lead times will be displayed for L4978 often in real-time on the comparison pages.
What if I can't find stock of L4978?
You can fill out our help required form which you can use to request a quote for L4978 from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.