- Datasheet Download Datasheet
- Stock & Prices $ Price & Stock for L4981A
- Part Number L4981A
- Manufacturer STMicroelectronics
- Pin Count 20
- Part Category Integrated Circuit
- Package Category Dual-In-Line Packages
- Footprint Name Dual-In-Line Packages - DIP_20
- Released Date Jan 17, 2021
- Last Modified Date Jan 8, 2026 2:31 PM UTC
- Pinout / Pin List Click Here (Member Only)
L4981A Details
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Manufacturer Part Number:
L4981A
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Brand Name:
STMicroelectronics
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Rohs Code:
Yes
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Part Life Cycle Code:
Obsolete
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Part Package Code:
DIP
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Package Description:
DIP-20
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Pin Count:
20
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ECCN Code:
EAR99
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HTS Code:
8542.39.00.60
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Manufacturer:
STMicroelectronics
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YTEOL:
0
L4981A Frequently Asked Questions (FAQs)
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The maximum input voltage that can be applied to the L4981A is 40V, but it's recommended to keep it below 30V for reliable operation.
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The inductor value depends on the output current, switching frequency, and input voltage. A good starting point is to use the inductor value recommended in the datasheet (e.g., 10uH) and adjust based on your specific application requirements.
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The bootstrap capacitor (CBOOT) is used to generate the high-side gate drive voltage. Choose a capacitor with a value between 10nF to 100nF, depending on the switching frequency and output current.
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Ensure good thermal design, use a heat sink if necessary, and keep the device away from heat sources. Monitor the junction temperature (TJ) and adjust the design as needed to keep TJ below 150°C.
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The minimum ESR required for the output capacitor depends on the output current and switching frequency. A good rule of thumb is to choose an output capacitor with an ESR of 0.1 ohms or less.
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L4981A Overview
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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