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LT1521IST-3#PBF - Analog Devices

Description: 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown

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LT1521IST-3#PBF - Analog Devices - PCB symbol
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PCB Footprints
LT1521IST-3#PBF - Analog Devices PCB footprint - SOT223 (3-Pin) - SOT223 (3-Pin) - ST Package 3-Lead Plastic SOT-223
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3D Models
LT1521IST-3#PBF - Analog Devices - 3D model - SOT223 (3-Pin) - ST Package 3-Lead Plastic SOT-223
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LT1521IST-3#PBF Details

  • Manufacturer Part Number:

    LT1521IST-3#PBF

  • Brand Name:

    Analog Devices Inc

  • Pbfree Code:

    No

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Pin Count:

    3

  • Manufacturer Package Code:

    05-08-1630

  • Country Of Origin:

    Thailand

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.01

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    9

  • Adjustability:

    FIXED

  • Dropout Voltage1-Max:

    0.75 V

  • Dropout Voltage1-Nom:

    0.5 V

  • Input Voltage Absolute-Max:

    20 V

  • Input Voltage-Max:

    20 V

  • Input Voltage-Min:

    4 V

  • JESD-30 Code:

    R-PDSO-G4

  • JESD-609 Code:

    e3

  • Length:

    6.505 mm

  • Line Regulation-Max:

    0.02%

  • Load Regulation-Max:

    0.055%

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    4

  • Operating Temperature TJ-Max:

    125 °C

  • Operating Temperature TJ-Min:

    -40 °C

  • Output Current1-Max:

    0.3 A

  • Output Voltage1-Max:

    3.1 V

  • Output Voltage1-Min:

    2.9 V

  • Output Voltage1-Nom:

    3 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOT-223

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Regulator Type:

    FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR

  • Seated Height-Max:

    1.8 mm

  • Surface Mount:

    YES

  • Technology:

    BIPOLAR

  • Terminal Finish:

    Matte Tin (Sn)

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    2.3 mm

  • Terminal Position:

    DUAL

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

    30

  • Voltage Tolerance-Max:

    3.3%

  • Width:

    3.505 mm

LT1521IST-3#PBF Frequently Asked Questions (FAQs)

  • A good PCB layout for the LT1521IST-3#PBF involves keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and widths to reduce noise and EMI. A 4-layer PCB with a dedicated power plane and a separate ground plane is recommended.
  • To ensure stability, make sure to follow the recommended component values and PCB layout guidelines. Also, ensure that the output capacitor has a low ESR and is properly decoupled from the input capacitor. Additionally, avoid using capacitors with high ESL and ESR values, and keep the feedback loop impedance low.
  • The LT1521IST-3#PBF has an operating temperature range of -40°C to 125°C, but the maximum ambient temperature range depends on the specific application and the device's power dissipation. Typically, the maximum ambient temperature is around 85°C to 90°C, but this can be derated based on the device's power dissipation and the thermal resistance of the PCB.
  • Yes, the LT1521IST-3#PBF is a high-reliability device that meets the requirements of various aerospace and defense standards, including MIL-PRF-38535 and NASA's EEE-INST-002. However, it's essential to follow the recommended design and manufacturing guidelines to ensure the device meets the specific requirements of your application.
  • To troubleshoot issues with the LT1521IST-3#PBF, start by checking the PCB layout and component values against the recommended design guidelines. Ensure that the input and output capacitors are properly decoupled, and the feedback loop impedance is low. Use an oscilloscope to measure the output voltage and current, and check for any signs of oscillation or instability. If the issue persists, consult the datasheet and application notes for further guidance.

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LT1521IST-3#PBF Overview

Use the download button to access the LT1521IST-3#PBF schematic symbol, PCB footprint, and 3D model.
To find more CAD model downloads similar to this part, try a partial part number search, like LT152, or try a keyword search, such as Linear Regulator ICs

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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