L5981 footprint, schematic symbol and 3D model by STMicroelectronics

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PCB Footprints

L5981 - STMicroelectronics PCB footprint - PSON D-Shape Leads Thermal Pad - PSON D-Shape Leads Thermal Pad - VFQFPN8

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Datasheet Download Datasheet
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Part Number L5981
Manufacturer STMicroelectronics
Pin Count 9
Part Category Integrated Circuit
Package Category PSON D-Shape Leads Thermal Pad
Footprint Name PSON D-Shape Leads Thermal Pad - VFQFPN8
Released Date Nov 26, 2025
Last Modified Date Jan 8, 2026 2:31 PM UTC
Pinout / Pin List Click Here (Member Only)

L5981 Details

Manufacturer Part Number:
L5981
Brand Name:
STMicroelectronics
Rohs Code:
Yes
Part Life Cycle Code:
Obsolete
Part Package Code:
QFP
Package Description:
HVSON, SOLCC8,.11,20
Pin Count:
8
Reach Compliance Code:
Compliant
ECCN Code:
EAR99
HTS Code:
8542.39.00.60
Manufacturer:
STMicroelectronics
YTEOL:
0
Analog IC - Other Type:
SWITCHING REGULATOR
Control Mode:
VOLTAGE-MODE
Input Voltage-Max:
18 V
Input Voltage-Min:
2.9 V
Input Voltage-Nom:
12 V
JESD-30 Code:
S-PDSO-N8
JESD-609 Code:
e3
Length:
3 mm
Moisture Sensitivity Level:
1
Number of Functions:
1
Number of Terminals:
8
Output Current-Max:
1 A
Package Body Material:
PLASTIC/EPOXY
Package Code:
HVSON
Package Equivalence Code:
SOLCC8,.11,20
Package Shape:
SQUARE
Package Style:
SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Packing Method:
TR
Peak Reflow Temperature (Cel):
260
Qualification Status:
Not Qualified
Seated Height-Max:
1 mm
Surface Mount:
YES
Switcher Configuration:
BUCK
Switching Frequency-Max:
1000 kHz
Technology:
MOS
Terminal Finish:
Matte Tin (Sn) - annealed
Terminal Form:
NO LEAD
Terminal Pitch:
0.5 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Width:
3 mm

L5981 Frequently Asked Questions (FAQs)

STMicroelectronics provides a recommended PCB layout in the application note AN4553, which includes guidelines for component placement, routing, and thermal management to minimize noise and ensure reliable operation.
The inductor value depends on the input voltage, output voltage, and switching frequency. A good starting point is to use the inductor selection guide provided in the L5981 datasheet, and then fine-tune the value based on the specific requirements of your application.
The L5981 is rated for operation from -40°C to 150°C, but the maximum ambient temperature range depends on the specific package and the power dissipation of the device. Refer to the thermal management section of the datasheet for more information.
Yes, the L5981 can be used in a synchronous rectification configuration to improve efficiency. However, this requires additional external components and careful design to ensure proper operation. Refer to the application note AN4553 for more information.
STMicroelectronics provides a troubleshooting guide in the application note AN4553, which covers common issues and their solutions. Additionally, the L5981 datasheet provides guidance on how to identify and fix common problems.

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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