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L4981BD on a board, in 3D

L4981BD

STMicroelectronics

-40℃~+125℃ 100kHz 14.5V~19.5V 1V 2A Boost Non-Isolated Over Voltage Protection、Under Voltage Protection、Over Current Protection、Soft start PWM Modulation SOIC-20-300mil PFC Controllers ROHS

Extended
DatasheetJLCPCBLCSCst/L4981BD
Category
AC DC Controllers And Regulators
Package
SOIC-20-300mil
Pins
20

Overview

The L4981BD is an AC DC Controllers And Regulator made by STMicroelectronics in a SOIC-20-300mil package with 20 pins. -40℃~+125℃ 100kHz 14.5V~19.5V 1V 2A Boost Non-Isolated Over Voltage Protection、Under Voltage Protection、Over Current Protection、Soft start PWM Modulation SOIC-20-300mil PFC Controllers ROHS.

PCBKit's library has its KiCad symbol (Regulator_Controller:L4981B, from KiCad's library) and its footprint (Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C2970992).

Symbol

P-GND1IPK2OVP3IAC4CA-OUT5LFF6VRMS7MULT-OUT8ISENSE9S-GND10VREF11SS12VA-OUT13VFEED14P-UVLO15FREQ-MOD16ROSC17COSC18VCC19GDRV20
Regulator_Controller:L4981BFrom KiCad's library

Footprint

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

Order codes

1

Pinout

20
The pins of the L4981BD
PinNameType
1P-GNDPower in
2IPKInput
3OVPInput
4IACInput
5CA-OUTOutput
6LFFInput
7VRMSInput
8MULT-OUTOutput
9ISENSEInput
10S-GNDPower in
11VREFOutput
12SSPassive
13VA-OUTOutput
14VFEEDInput
15P-UVLOInput
16FREQ-MODInput
17ROSCPassive
18COSCPassive
19VCCPower in
20GDRVOutput

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Questions

Is there a KiCad symbol and footprint for the L4981BD?

Yes. The symbol is Regulator_Controller:L4981B 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 L4981BD?

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

Where is the L4981BD datasheet?

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

Where can I order the L4981BD?

JLCPCB lists it as part C2970992, with 0 in stock; the sellers' links on this page open their listings.

What can replace the L4981BD?

Parts like it in the library: the UCC3895DWTR by Texas Instruments, the L4981AD013 by STMicroelectronics, the UCC28070DW by Texas Instruments and the STNRG012 by STMicroelectronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.

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8