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L4973D3.3 on a board, in 3D

L4973D3.3

STMicroelectronics

-40℃~+150℃ 1 1mA 3.3V 3.5A 8V~55V 90kHz~300kHz Buck Buck Built-in Fixed No SO-20-300mil DC-DC Converters ROHS

Extended
DatasheetJLCPCBLCSCst/L4973D3.3
Category
DC DC Converters
Package
SO-20-300mil
Pins
20

Overview

The L4973D3.3 is a DC DC Converter made by STMicroelectronics in a SO-20-300mil package with 20 pins. -40℃~+150℃ 1 1mA 3.3V 3.5A 8V~55V 90kHz~300kHz Buck Buck Built-in Fixed No SO-20-300mil DC-DC Converters ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:L4973D5.1-013TR, from EasyEDA) and its footprint (Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm, from KiCad's library), ready for a KiCad board. 9 are in stock at JLCPCB (part C1355636).

Symbol

OSC1OUT2OUT3GND4GND5GND6GND7VCC8VCC9BOOT10INH11COMP12VFB13GND14GND15GND16GND17V5.118SS19SYNC20
EasyEDA_Cloud:L4973D5.1-013TRFrom EasyEDA

Footprint

1234567891011121314151617181920
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mmFrom KiCad's library

Parameters

13
Features
Hiccup current limiting
Frequency - Switching
90kHz~300kHz
Function
Step-down type
Number of Outputs
1
Operating Temperature
-40℃~+150℃
Output Current
3.5A
Output Type
Fixed
Output Voltage
3.3V
Quiescent Current
1mA
Switch tube (built-in/external)
Built-in
Synchronous Rectifier
No
Topology
Buck
Voltage - Supply
8V~55V

Order codes

1

Pinout

20
The pins of the L4973D3.3
PinNameType
1OSCUnspecified
2OUTUnspecified
3OUTUnspecified
4GNDUnspecified
5GNDUnspecified
6GNDUnspecified
7GNDUnspecified
8VCCUnspecified
9VCCUnspecified
10BOOTUnspecified
11INHUnspecified
12COMPUnspecified
13VFBUnspecified
14GNDUnspecified
15GNDUnspecified
16GNDUnspecified
17GNDUnspecified
18V5.1Unspecified
19SSUnspecified
20SYNCUnspecified

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Questions

Is there a KiCad symbol and footprint for the L4973D3.3?

Yes. The symbol is EasyEDA_Cloud:L4973D5.1-013TR and the footprint Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the L4973D3.3?

SO-20-300mil, with 20 pins. Its footprint is drawn on this page.

Where is the L4973D3.3 datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the L4973D3.3?

JLCPCB lists it as part C1355636, with 9 in stock; the sellers' links on this page open their listings.

What can replace the L4973D3.3?

Parts like it in the library: the BD9C401EFJ-E2 by ROHM Semiconductor, the LM2576S-3.3 by HXY MOSFET, the RT6258BGQUF by Richtek Tech and the LMS3635NQRNLRQ1 by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8