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LM21305SQ/NOPB - Texas Instruments

Description: 3-18V, 5A, Current Mode Synchronous Buck Regulator with Adjustable Frequency

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PCB Footprints
LM21305SQ/NOPB - Texas Instruments PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - RSG(S-PVQFN-N28)
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3D Models
LM21305SQ/NOPB - Texas Instruments  - 3D model - Quad Flat No-Lead - RSG(S-PVQFN-N28)
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LM21305SQ/NOPB Details

  • Manufacturer Part Number:

    LM21305SQ/NOPB

  • Brand Name:

    Texas Instruments

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    QFN

  • Pin Count:

    28

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.90

  • Manufacturer:

    Texas Instruments

  • YTEOL:

    15

  • Additional Feature:

    5 VOLT REGULATING OUTPUT ALSO AVAILABLE

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    18 V

  • Input Voltage-Min:

    3 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    S-PQCC-N28

  • JESD-609 Code:

    e3

  • Length:

    5 mm

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    28

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    5 A

  • Output Voltage-Max:

    0.6 V

  • Output Voltage-Min:

    0.6 V

  • Output Voltage-Nom:

    2.5 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC28,.2SQ,20

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    0.8 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    1500 kHz

  • Technology:

    BICMOS

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    5 mm

LM21305SQ/NOPB Frequently Asked Questions (FAQs)

  • The LM21305SQ/NOPB can handle a maximum input voltage of 42V, but it's recommended to operate within the specified input voltage range of 3.5V to 36V for optimal performance.
  • To ensure stability, it's essential to follow the recommended PCB layout guidelines, use a sufficient output capacitor, and add a compensation capacitor (if necessary) as specified in the datasheet.
  • The minimum ESR required for the output capacitor is 0.1 ohms. However, it's recommended to use a capacitor with an ESR of 0.05 ohms or less for optimal performance.
  • The LM21305SQ/NOPB is rated for operation up to 125°C, but it's essential to consider the thermal design and ensure proper heat dissipation to prevent overheating.
  • The output voltage of the LM21305SQ/NOPB can be calculated using the formula: Vout = (1 + R2/R1) * 0.8V, where R1 and R2 are the resistors used in the feedback network.

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LM21305SQ/NOPB Overview

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About Texas Instruments

Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.

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