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L4972A on a board, in 3D

L4972A

STMicroelectronics

-40℃~+150℃@(TJ) 1 15V~50V 200kHz 2A 5.1V~40V Adjustable Buck Buck Built-in No DIP-20 DC-DC Converters ROHS

Extended
DatasheetJLCPCBLCSCst/L4972A
Category
DC DC Converters
Package
DIP-20
Pins
2

Overview

The L4972A is a DC DC Converter made by STMicroelectronics in a DIP-20 package with 20 pins. -40℃~+150℃@(TJ) 1 15V~50V 200kHz 2A 5.1V~40V Adjustable Buck Buck Built-in No DIP-20 DC-DC Converters ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:L4972A, from EasyEDA) and its footprint (Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1355639).

Symbol

BOOTSTRAP1RESET_DELAY2RESET_OUT3P_FAIL_INPUT4GND5GND6FREQ_COMP7SOFT_START8FEEDBACK_IN9SYNC_INPUT10Vi11NC12Vref13Vstart14GND15GND16R_OSC17C_OSC18NC19OUTPUT20
EasyEDA_Cloud:L4972AFrom EasyEDA

Footprint

1234567891011121314151617181920
Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPadsFrom KiCad's library

Parameters

13
Features
Overcurrent Protection, Adjustable soft-start, Operating status indication, Cycle-by-cycle current limiting, Frequency synchronization
Frequency - Switching
200kHz
Function
Step-down type
Number of Outputs
1
Operating Temperature
-40℃~+150℃@(TJ)
Output Current
2A
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

Pinout

20
The pins of the L4972A
PinNameType
1BOOTSTRAPUnspecified
2RESET_DELAYUnspecified
3RESET_OUTUnspecified
4P_FAIL_INPUTUnspecified
5GNDUnspecified
6GNDUnspecified
7FREQ_COMPUnspecified
8SOFT_STARTUnspecified
9FEEDBACK_INUnspecified
10SYNC_INPUTUnspecified
11ViUnspecified
12NCUnspecified
13VrefUnspecified
14VstartUnspecified
15GNDUnspecified
16GNDUnspecified
17R_OSCUnspecified
18C_OSCUnspecified
19NCUnspecified
20OUTPUTUnspecified

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Questions

Is there a KiCad symbol and footprint for the L4972A?

Yes. The symbol is EasyEDA_Cloud:L4972A and the footprint Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the L4972A?

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

Where is the L4972A datasheet?

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

Where can I order the L4972A?

JLCPCB lists it as part C1355639, with 0 in stock; the sellers' links on this page open their listings.

What can replace the L4972A?

Parts like it in the library: the SG1577DY by onsemi, the UC2875N/81290 by Texas Instruments, the MAX741DCPP by Maxim Integrated (Analog Devices) and the MAX741NCPP by Maxim Integrated (Analog Devices). Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

5