Part Details for L7981 by STMicroelectronics
Results Overview of L7981 by STMicroelectronics
- Distributor Offerings: (2 listings)
- Number of FFF Equivalents: (0 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (1 option)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Energy and Power Systems
Transportation and Logistics
Renewable Energy
Automotive
L7981 Information
L7981 by STMicroelectronics is a Switching Regulator or Controller.
Switching Regulator or Controllers are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Price & Stock for L7981
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
L7981-ND
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DigiKey | IC REG BUCK ADJ 3A 8VFQFPN Lead time: 28 Weeks Container: Tube | Temporarily Out of Stock |
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Buy Now | |
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Vyrian | Other Function Semiconductors | 1355 |
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RFQ |
Part Details for L7981
L7981 CAD Models
L7981 Part Data Attributes
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L7981
STMicroelectronics
Buy Now
Datasheet
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Compare Parts:
L7981
STMicroelectronics
3 A step-down switching regulator
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| Rohs Code | Yes | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Part Package Code | QFP | |
| Package Description | 3 X 3 MM, 1.08 MM HEIGHT, ROHS COMPLIANT, VFQFP-8 | |
| Pin Count | 8 | |
| Reach Compliance Code | compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Samacsys Manufacturer | STMicroelectronics | |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE FROM 0.6 V | |
| Analog IC - Other Type | SWITCHING REGULATOR | |
| Control Mode | VOLTAGE-MODE | |
| Control Technique | PULSE WIDTH MODULATION | |
| Input Voltage-Max | 28 V | |
| Input Voltage-Min | 4.5 V | |
| Input Voltage-Nom | 12 V | |
| JESD-30 Code | S-XDSO-N8 | |
| JESD-609 Code | e4 | |
| Length | 3 mm | |
| Moisture Sensitivity Level | 3 | |
| Number of Functions | 1 | |
| Number of Terminals | 8 | |
| Operating Temperature-Max | 125 °C | |
| Operating Temperature-Min | -40 °C | |
| Output Current-Max | 3 A | |
| Package Body Material | UNSPECIFIED | |
| Package Code | HVSON | |
| Package Equivalence Code | SOLCC8,.12,20 | |
| Package Shape | SQUARE | |
| Package Style | SMALL OUTLINE | |
| Peak Reflow Temperature (Cel) | 260 | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 1 mm | |
| Surface Mount | YES | |
| Switcher Configuration | BUCK | |
| Switching Frequency-Max | 275 kHz | |
| Temperature Grade | AUTOMOTIVE | |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) | |
| Terminal Form | NO LEAD | |
| Terminal Pitch | 0.5 mm | |
| Terminal Position | DUAL | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Width | 3 mm |
Alternate Parts for L7981
This table gives cross-reference parts and alternative options found for L7981. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of L7981, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| L7981TR | STMicroelectronics | $1.8584 | 3 A step-down switching regulator | L7981 vs L7981TR |
L7981 Frequently Asked Questions (FAQ)
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The L7981 can handle input voltages up to 45V, but it's recommended to keep the input voltage below 40V for reliable operation.
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The output capacitor should have a minimum capacitance of 10uF and an ESR (Equivalent Series Resistance) of less than 1 ohm. A ceramic or tantalum capacitor with a voltage rating of at least 2x the output voltage is recommended.
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The L7981 is rated for operation up to 150°C, but the maximum junction temperature (TJ) should not exceed 125°C. Ensure proper thermal design and heat sinking to maintain a safe operating temperature.
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Power dissipation (PD) can be calculated using the formula: PD = (VIN - VOUT) x IOUT + (VIN x IQ), where IQ is the quiescent current. Ensure the PD is within the recommended limit of 1.5W for the L7981.
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The L7981 is not AEC-Q100 qualified, so it's not recommended for automotive applications. Instead, consider using an automotive-grade voltage regulator from STMicroelectronics, such as the L4940 or L4941.