Logo
Contact Us
Cookies Policy
Terms of Use
Privacy Policy
phone
Vivi (Sales)
phone
Lucy (Sales)
phone
Ban (Sales)
phone
+86 755-2845-3125
RFQ List
  • open navigation menu
    • Logo
    • RFQ List
      • Manufacturers
      • Hot Products
      • RFQ
      • Blog
      • Tools
      • Sourcing Solutions
      • PCB/SMT
      • About Us
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    Certification badge
    CONTACT US
    +86 755-2845-3125
    [email protected][email protected][email protected]
    Room 2709B, 5A Office Building, Longguang Jiuzuan, Hongshan, Longhua District, Shenzhen, China
    Company
    • Blog
    • About Us
    • Contact Us
    Resources
    • Categories
    • Manufacturers
    • Tools
    • RFQ
    Quick link
    • Privacy Policy
    • Terms of Use
    • Cookies Policy
    • Refund & Return Policy
    • Shipping & Delivery Policy
    Payment
    • Payment method
    • Payment method
    • Payment method
    • Payment method
    Logistics
    • Logistics partner
    • Logistics partner
    • Logistics partner
    • Logistics partner

    © 2026 Copyright. All Rights Reserved. Made by ICAllIn

    Part number
    Part number
    1. Home/
    2. All Categories/
    3. Power/
    4. DC/DC Converters/
    5. L4978 STMicroelectronics

    L4978 [STMicroelectronics]

    L4978
    L4978

    Part No:

    L4978

    Category:

    DC/DC Converters

    Manufacturer:

    STMicroelectronics

    Description:

    8 Terminals 8V 8-Pin L4978 DC DC Voltage Regulator SWITCHING REGULATOR 1 Outputs 100kHz~300kHz Tube 8-DIP (0.300, 7.62mm)

    RoHS Status:

    Product FAQ

    1. Is L4978 available for RFQ?

    Yes. L4978 by STMicroelectronics is available for RFQ. Submit your required quantity and our team will confirm real-time stock, lead time, and volume pricing.

    2. Why is there no fixed price for L4978?

    Pricing for L4978 can vary by order quantity, market availability, date code, packaging, and delivery destination. Request a quote to receive the latest volume pricing.

    3. What are the key specifications of L4978?

    L4978 is a STMicroelectronics DC/DC Converters with Packaging: Tube and Moisture Sensitivity Level (MSL): 1 (Unlimited) and Supply Current-Max (Isup): 6mA. Review the product details or submit an RFQ if you need confirmation before purchase.

    4. How fast can I get a quote for L4978?

    Our sales team usually responds within 24 hours after receiving your RFQ. The quote may include stock status, unit price, lead time, shipping options, and available alternatives.

    5. How soon can L4978 be shipped?

    If stock is confirmed, in-stock parts can usually ship within 1–2 business days. Final lead time depends on quantity, stock source, and delivery destination.

    6. Can you suggest alternatives to L4978?

    Yes. If L4978 is unavailable, obsolete, or does not meet your required lead time, we can help check similar STMicroelectronics DC/DC Converters parts or compatible alternatives.

    RFQ

    Part Number:

    L4978

    Manufacturer:

    STMicroelectronics

    Looking for Pricing? Contact us for volume pricing.

    IMPORTANT NOTICE

    Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.

    Featured Product

    Datasheet:

    Stock Status:

    Available for RFQ

    Pricing:

    Request Volume Pricing

    Quote Response:

    Within 24 Hours

    Shipping:

    In-stock parts ship in 1–2 business days

    Specification

    Type
    Parameter
    Factory Lead Time
    13 Weeks
    Contact Plating
    Tin
    Mount
    Through Hole
    Mounting Type
    Through Hole
    Package / Case
    8-DIP (0.300, 7.62mm)
    Number of Pins
    8
    Operating Temperature
    -40°C~150°C TJ
    Packaging
    Tube
    JESD-609 Code
    e3
    Part Status
    Active
    Moisture Sensitivity Level (MSL)
    1 (Unlimited)
    Number of Terminations
    8
    ECCN Code
    EAR99
    Technology
    BCDMOS
    Terminal Position
    DUAL
    Terminal Pitch
    2.54mm
    Frequency
    300kHz
    Base Part Number
    L4978
    Function
    Step-Down
    Number of Outputs
    1
    Efficiency
    87 %
    Voltage - Input (Max)
    55V
    Output Voltage
    50V
    Output Type
    Adjustable
    Max Output Current
    2A
    Operating Supply Voltage
    55V
    Voltage - Input (Min)
    8V
    Input Voltage-Nom
    24V
    Analog IC - Other Type
    SWITCHING REGULATOR
    Output Configuration
    Positive
    Max Output Voltage
    50V
    Topology
    Buck
    Control Mode
    VOLTAGE-MODE
    Frequency - Switching
    100kHz~300kHz
    Control Technique
    PULSE WIDTH MODULATION
    Supply Current-Max (Isup)
    6mA
    Synchronous Rectifier
    No
    Dropout Voltage
    580mV
    Min Output Voltage
    3.3V
    Height
    3.32mm
    Length
    10.92mm
    Width
    6.6mm
    REACH SVHC
    No SVHC
    RoHS Status
    RoHS Compliant
    Lead Free
    Lead Free

    Products Detail

    L4978 Overview


    A Tube package is used in this voltage regulator to optimize performance. In this voltage regulator, 8 terminations are present. A SWITCHING REGULATOR analog IC is used in this voltage regulator 12v, which is the type of analog IC that this voltage regulator 12v is equipped with. In order to save space, this voltage regulator is packaged in the 8-DIP (0.300, 7.62mm) package. 1 outputs of voltage regulator are configured. Adjustable outputs are generated on the output pins of this adjusting voltage regulator. A voltage regulator 12v such as this one fits the Through Hole mounting bracket. Keeping dc to dc voltage regulator's operating temperature at -40°C~150°C TJ is essential when operating. A DC-DC switching regulator such as this one switches at 100kHz~300kHz. Voltage regulators like this one can operate at least with 8V as the dc to dc voltage regulator's minimum input voltage. As far as the voltage input is concerned, DC DC switching regulator can accept up to 55V. An input voltage of 24V is required to meet the requirements of the switching regulator operation. A voltage regulator 12v such as this falls under the Switching Regulator or Controllers category and belongs to this category. As a member of the L4978 family of DC/DC regulators, this is a DC/DC regulator. The voltage DC DC switching regulator can provide is up to 50V volts. During switching regulator operation, 8 pins are used. Ideally this switch regulator should have an output voltage of about 3.3V at the very least. A maximum output current of 2A A is provided to meet the switching regulator operation requirements. DC DC switching regulator offers a maximum output voltage of 50V as its maximum output voltage. DC-DC switching regulator with supply voltage 55V. With a frequency of 300kHz, dc to dc voltage regulator has high accuracy.

    L4978 Features


    1 outputs
    8 pins
    Operating supply voltage of 55V


    L4978 Applications


    There are a lot of STMicroelectronics
    L4978 Voltage Regulators applications.


    • Various precision measuring instruments
    • Various precision measuring detectors
    • Flaw detection equipment
    • Balance equipment
    • Industrial robots
    • Industrial controllers
    • Die casting equipment
    • Injection molding machinery
    • Various CNC machine tools
    • Machining centers

    Documents

    Datasheets:

    L4978L4978-STMicroelectronics-datasheet-8123043.pdfL4978-STMicroelectronics-datasheet-12526185.pdfL4978-STMicroelectronics-datasheet-15340.pdfL4978-STMicroelectronics-datasheet-9686649.pdfL4978-STMicroelectronics-datasheet-8214655.pdfL4978-STMicroelectronics-datasheet-14166708.pdf

    PCN Assembly/Origin:

    Mult Dev Moulding Chg 28/Jan/2020
    Shipping & Warranty

    Fast Dispatch: Ships in 5-7 days(in-stock parts within 1-2 days)

    Unishop Global Export: 1-7 days, $40.00

    Guaranteed Delivery: Door-to-door in 30 days

    Compliant Worldwide Shipping: DHL, FedEx, SF, and UPS.

    Feature

    • 30-Day Guarantee
      30-Day Guarantee
    • Fasted Delivery
      Fasted Delivery
    • Hassle-Free Returns
      Hassle-Free Returns
    • Secure payment method
      Secure payment method

    BEST SELL
    K4B2G1646F-BCNB

    K4B2G1646F-BCNB

    SAMSUNG

    BEST SELL
    ADS1248IPWR

    ADS1248IPWR

    Texas Instruments

    BEST SELL
    MT41K128M16JT-125 IT:KTR

    MT41K128M16JT-125 IT:KTR

    Unknown

    BEST SELL
    IS43LQ32256A-062BLI

    IS43LQ32256A-062BLI

    ISSI

    BEST SELL
    ISL94202IRTZ-T

    ISL94202IRTZ-T

    RENESAS

    BEST SELL
    ISO7721DR

    ISO7721DR

    Texas Instruments

    BEST SELL
    BAV99-7-F

    BAV99-7-F

    DIODES

    BEST SELL
    ISM330DHCX

    ISM330DHCX

    STMicroelectronics

    BEST SELL
    K4AAG165WA-BCWE

    K4AAG165WA-BCWE

    SAMSUNG

    BEST SELL
    MT48H32M16LFB4-6 IT:C

    MT48H32M16LFB4-6 IT:C

    Micron

    Related Information
    • Part Number
      Manufacturer
      Stock Status
      Pricing
      RoHS/Datasheet
    • E-L9758BBTR
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
    • LD39020DTPU25R
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
    • STPMIC1CPQR
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
    • L6982C33DR
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
      -
    • L6728
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
    • A6983C50QTR
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
      -
    • LD1086D2T33TR
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
    • LDK220M27R
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
    • LDK120PU18R
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing
    • L78M15CDT-TR
      STMicroelectronics
      Available for RFQ
      Request Volume Pricing

    L78M12CDT-TR

    L78M12CDT-TR

    STMicroelectronics

    L7805ACD2T-TR

    L7805ACD2T-TR

    STMicroelectronics

    L4976D013TR

    L4976D013TR

    STMicroelectronics

    L4973D3.3

    L4973D3.3

    STMicroelectronics

    LM217T

    LM217T

    STMicroelectronics

    L4964

    L4964

    STMicroelectronics

    L7908

    L7908

    STMicroelectronics

    LD59015C33R

    LD59015C33R

    STMicroelectronics

    L7905CD2T-TR

    L7905CD2T-TR

    STMicroelectronics

    L79L05ABZ-AP

    L79L05ABZ-AP

    STMicroelectronics

    Buffer Modules(892)Power Inverters(7299)Battery Holders, Clips & Contacts(447)DC Power Connectors(33)Power Condition(27401)Transformers(12577)Battery Chargers(11802)AC Power Plugs & Receptacles(207)Thermoelectric Assemblies(2475)Power Supplies(336747)

    No recently viewed products