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LTC3899IUHF#PBF - Analog Devices

Description: Dual Buck Plus Single Boost Synchronous Controllers n Wide Bias Input Voltage Range: 4.5V to 60V n Outputs Remain in Regulation Through Cold Crank Down to a 2.2V Input Supply Voltage n Buck and Boost Output Voltages Up to 60V n Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE) n No External Bootstrap Diodes Required n Low Operating IQ: 29μA (One Channel On) n 100% Duty Cycle for Boost Synchronous MOSFET

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LTC3899IUHF#PBF - Analog Devices - PCB symbol
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PCB Footprints
LTC3899IUHF#PBF - Analog Devices PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - UHF Package 38-Lead Plastic QFN (5mm × 7mm) (Reference LTC DWG # 05-08-1701 Rev C)
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3D Models
LTC3899IUHF#PBF - Analog Devices - 3D model - Quad Flat No-Lead - UHF Package 38-Lead Plastic QFN (5mm × 7mm) (Reference LTC DWG # 05-08-1701 Rev C)
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LTC3899IUHF#PBF Details

  • Manufacturer Part Number:

    LTC3899IUHF#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    QFN-38

  • Pin Count:

    38

  • Manufacturer Package Code:

    05-08-1701

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Additional Feature:

    ALSO OPERATES AT 10V

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    60 V

  • Input Voltage-Min:

    4.5 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    R-PQCC-N38

  • JESD-609 Code:

    e3

  • Length:

    7 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    38

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Voltage-Max:

    60 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC38,.2X.28,20

  • Package Shape:

    RECTANGULAR

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Seated Height-Max:

    0.8 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK-BOOST

  • Switching Frequency-Max:

    900 kHz

  • Technology:

    CMOS

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Width:

    5 mm

LTC3899IUHF#PBF Frequently Asked Questions (FAQs)

  • The maximum input voltage that can be applied to the VIN pin is 28V, but it's recommended to keep it below 24V for optimal performance and reliability.
  • To minimize EMI, it's recommended to follow a star-ground configuration, keep the input and output capacitors close to the IC, and use a solid ground plane. Additionally, use a shielded inductor and keep the switching node (SW) away from sensitive analog nodes.
  • The recommended operating frequency range for the LTC3899IUHF#PBF is between 200 kHz to 1 MHz. Operating outside of this range may affect the converter's efficiency and stability.
  • To select the right inductor, consider the maximum current rating, inductance value, and core material. A good starting point is to choose an inductor with a saturation current rating of at least 1.5 times the maximum output current, and an inductance value between 1uH to 10uH.
  • The SYNC pin allows the LTC3899IUHF#PBF to synchronize with an external clock signal. To use it, connect the SYNC pin to an external clock signal with a frequency between 200 kHz to 1 MHz, and ensure the clock signal is stable and has a duty cycle of 50%.

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LTC3899IUHF#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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