L4974A

STMicroelectronicsExtended

-40℃~+150℃@(TJ) 1 13mA 15V~50V 200kHz 3.5A 5.1V~40V Adjustable Buck Built-in No Overcurrent Protection、Adjustable soft-start、Operating status indication、Cycle-by-cycle current limiting、Frequency synchronization、External compensation Step-down type DIP-20 DC-DC Converters ROHS

Datasheet JLCPCB LCSC

Part id: st/L4974A
Category: DC DC Converters
Package: DIP-20
Pins: 20
In stock: 0 at JLCPCB (C1356081)

Overview

The L4974A is a DC DC Converter made by STMicroelectronics in a DIP-20 package with 20 pins. -40℃~+150℃@(TJ) 1 13mA 15V~50V 200kHz 3.5A 5.1V~40V Adjustable Buck Built-in No Overcurrent Protection、Adjustable soft-start、Operating status indication、Cycle-by-cycle current limiting、Frequency synchronization、External compensation Step-down type DIP-20 DC-DC Converters ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:L4974A, from EasyEDA) and its footprint (Package_DIP:DIP-20_W7.62mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1356081).

Symbol

EasyEDA_Cloud:L4974AFrom EasyEDA

Footprint

Package_DIP:DIP-20_W7.62mmFrom KiCad's library

Pinout

The pins of the L4974A
Pin	Name	Type
1	BOOTSTRAP	Unspecified
2	RESET_DELAY	Unspecified
3	RESET_OUT	Unspecified
4	RESET_INPUT	Unspecified
5	GROUND	Unspecified
6	GROUND	Unspecified
7	FREQUENCY_COMPENSATION	Unspecified
8	SOFT_START	Unspecified
9	FEEDBACK_INPUT	Unspecified
10	SYNC_INPUT	Unspecified
11	SUPPLY_VOLTAGE	Unspecified
12	N.C.	Unspecified
13	Vref	Unspecified
14	Vstart	Unspecified
15	GROUND	Unspecified
16	GROUND	Unspecified
17	OSCILLATOR	Unspecified
18	OSCILLATOR	Unspecified
19	N.C.	Unspecified
20	OUTPUT	Unspecified

Parameters

Features: Overcurrent Protection, Adjustable soft-start, Operating status indication, Cycle-by-cycle current limiting, Frequency synchronization, External compensation
Frequency - Switching: 200kHz
Function: Step-down type
Number of Outputs: 1
Operating Temperature: -40℃~+150℃@(TJ)
Output Current: 3.5A
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

L4974ALCSC C1356081

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Parts like it

UC3879N
PDIP-200℃~+70℃@(TA) 300kHz 4 9V~20V External Half-Bridge PDIP-20 AC-DC Controllers and Regulators ROHSTexas InstrumentsDC-DC Converters

Questions

Is there a KiCad symbol and footprint for the L4974A?

Yes. The symbol is EasyEDA_Cloud:L4974A and the footprint Package_DIP:DIP-20_W7.62mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the L4974A?

DIP-20, with 20 pins. Its footprint is drawn on this page.

Where is the L4974A datasheet?

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

Where can I order the L4974A?

JLCPCB lists it as part C1356081, with 0 in stock; the sellers' links on this page open their listings.

What can replace the L4974A?

Parts like it in the library: the UC3879N by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.