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LTC3521IFE#PBF - Analog Devices

Description: Switching Voltage Regulators 1A Buck-Boost and Dual 600mA Buck Synchronous DC/DC Converters

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LTC3521IFE#PBF - Analog Devices PCB footprint - Small Outline Packages - Small Outline Packages - FE Package 20-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1663) CB
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LTC3521IFE#PBF - Analog Devices  - 3D model - Small Outline Packages - FE Package 20-Lead Plastic TSSOP (4.4mm) (Reference LTC DWG # 05-08-1663) CB
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LTC3521IFE#PBF Details

  • Manufacturer Part Number:

    LTC3521IFE#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    4.40 MM, LEAD FREE, PLASTIC, TSSOP-20

  • Pin Count:

    20

  • Manufacturer Package Code:

    05-08-1663 (CB)

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Additional Feature:

    ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 5.25 V; ALSO OPERATES IN CURRENT MODE

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    VOLTAGE-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    5.5 V

  • Input Voltage-Min:

    1.8 V

  • Input Voltage-Nom:

    3.6 V

  • JESD-30 Code:

    R-PDSO-G20

  • JESD-609 Code:

    e3

  • Length:

    6.5 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    1 A

  • Output Voltage-Max:

    5.25 V

  • Output Voltage-Min:

    1.8 V

  • Output Voltage-Nom:

    3.3 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HTSSOP

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.2 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    1350 kHz

  • Technology:

    CMOS

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.65 mm

  • Terminal Position:

    DUAL

  • Width:

    4.4 mm

LTC3521IFE#PBF Frequently Asked Questions (FAQs)

  • The maximum input voltage that can be applied to the LTC3521IFE is 18V, but it's recommended to keep it below 15V for optimal performance and reliability.
  • To optimize the inductor selection, consider the following factors: inductance value, DC resistance, core material, and saturation current. A good starting point is to use an inductor with an inductance value between 1uH to 10uH, and a DC resistance less than 100mΩ.
  • To minimize EMI and noise, follow these PCB layout guidelines: keep the input and output capacitors close to the IC, use a solid ground plane, and keep the high-frequency switching nodes (e.g., LX pin) away from sensitive analog nodes. Also, use a shielded inductor and orient it to minimize radiation.
  • To configure the LTC3521IFE for a specific output voltage, use the FB pin and an external resistor divider network to set the output voltage. The FB pin voltage is 0.8V, so choose resistors that divide the output voltage to 0.8V. For example, for a 5V output, use a 2.2kΩ resistor from VOUT to FB and a 1.2kΩ resistor from FB to GND.
  • The maximum output current that the LTC3521IFE can deliver is 1.5A, but it's limited by the input voltage, inductor selection, and thermal considerations. Be sure to check the thermal performance and adjust the output current accordingly to avoid overheating.

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LTC3521IFE#PBF Overview

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About Analog Devices

Analog Devices Inc. is a global leader in the design and manufacturing of analog, mixed-signal, and digital signal processing integrated circuits and software solutions for the industrial, automotive, healthcare, communications industries. Analog Devices serves a diverse range of markets including industrial, automotive, healthcare, energy, aerospace, defense, and consumer electronics industries. Analog Devices’ product portfolio includes a wide range of ICs, modules, and subsystems.

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