Overview
The L4977A is a DC DC Converter made by STMicroelectronics in a Multiwatt-15 package with 15 pins. -40℃~+150℃ 1 15V~50V 180kHz~500kHz 5.1V~40V 7A Adjustable Buck Buck Built-in No Multiwatt-15 DC-DC Converters ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:L4977A, from EasyEDA) and its footprint (EasyEDA_Cloud:MULTIWATT-15_L4977A, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C262896).
Symbol
Footprint
Parameters
13- Features
- Overcurrent Protection, Adjustable soft-start, Operating status indication, Cycle-by-cycle current limiting, Frequency synchronization
- Frequency - Switching
- 180kHz~500kHz
- Function
- Step-down type
- Number of Outputs
- 1
- Operating Temperature
- -40℃~+150℃
- Output Current
- 7A
- Output Type
- Adjustable
- Output Voltage
- 5.1V~40V
- Quiescent Current
- 13mA
- Switch tube (built-in/external)
- Built-in
- Synchronous Rectifier
- No
- Topology
- Buck
- Voltage - Supply
- 15V~50V
Order codes
1- L4977ALCSC C262896
Pinout
15| Pin | Name | Type |
|---|---|---|
| 1 | Rosc | Unspecified |
| 2 | Cosc | Unspecified |
| 3 | RESETINPUT | Unspecified |
| 4 | RESETOUT | Unspecified |
| 5 | RESETDELAY | Unspecified |
| 6 | BOOTSTRAP | Unspecified |
| 7 | OUTPUT | Unspecified |
| 8 | GND | Unspecified |
| 9 | Vi | Unspecified |
| 10 | FREQ.COMPENSATION | Unspecified |
| 11 | FEEDBACKINPUT | Unspecified |
| 12 | SOFTSTART | Unspecified |
| 13 | SYNC | Unspecified |
| 14 | Vref5.1V | Unspecified |
| 15 | Vstart | Unspecified |
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Is there a KiCad symbol and footprint for the L4977A?
Yes. The symbol is EasyEDA_Cloud:L4977A and the footprint EasyEDA_Cloud:MULTIWATT-15_L4977A, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the L4977A?
Multiwatt-15, with 15 pins. Its footprint is drawn on this page.
Where is the L4977A datasheet?
STMicroelectronics publishes it: the Datasheet link on this page opens it.
Where can I order the L4977A?
JLCPCB lists it as part C262896, with 0 in stock; the sellers' links on this page open their listings.