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LT1945EMS#TRPBF - Analog Devices

Description: Boost, SEPIC Switching Regulator IC Positive and Negative (Dual Rail) Adjustable ±1.23V 2 Output 250mA (Switch) 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

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LT1945EMS#TRPBF Details

  • Manufacturer Part Number:

    LT1945EMS#TRPBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    PLASTIC, LEAD FREE, MSOP-10

  • Pin Count:

    10

  • Manufacturer Package Code:

    05-08-1661

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    9

  • Analog IC - Other Type:

    DUAL SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    CONSTANT OFF TIME

  • Input Voltage-Max:

    12 V

  • Input Voltage-Min:

    1.2 V

  • Input Voltage-Nom:

    1.2 V

  • JESD-30 Code:

    S-PDSO-G10

  • JESD-609 Code:

    e3

  • Length:

    3 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    10

  • Operating Temperature-Max:

    70 °C

  • Output Current-Max:

    0.4 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    TSSOP

  • Package Shape:

    SQUARE

  • Package Style:

    SMALL OUTLINE, THIN PROFILE, SHRINK PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.1 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BOOST

  • Technology:

    BIPOLAR

  • Temperature Grade:

    COMMERCIAL

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    DUAL

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

    30

  • Width:

    3 mm

LT1945EMS#TRPBF Frequently Asked Questions (FAQs)

  • A 2-layer or 4-layer PCB with a solid ground plane and thermal vias under the IC is recommended. This helps to dissipate heat efficiently and reduce thermal resistance.
  • Use a soft-start circuit to limit the inrush current during start-up, and ensure that the input voltage rises slowly (e.g., using a ramp-up circuit) to prevent voltage spikes. For shutdown, use a soft-shutdown circuit to gradually reduce the output voltage.
  • A low-ESR ceramic capacitor (e.g., X5R or X7R) with a value of 10uF to 22uF is recommended. This helps to filter out input noise and ensure stable operation.
  • Use a low-pass filter (e.g., an RC filter) on the output, and consider adding a noise-reducing capacitor (e.g., a 10nF ceramic capacitor) between the output and ground. Additionally, ensure good PCB layout practices, such as separating analog and digital grounds.
  • The maximum ambient temperature for reliable operation is 85°C, but this can be derated based on the specific application and thermal design. Consult the datasheet for thermal derating curves.

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LT1945EMS#TRPBF 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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