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LT1129IQ - Analog Devices

Description: LDO Voltage Regulators LT1129 - Micropower Low Dropout Regulators with Shutdown , 3.8 V to 30 V , 700 mA , - 40 C + 125 C , 130 mV

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LT1129IQ - Analog Devices - PCB symbol
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LT1129IQ - Analog Devices PCB footprint - Other - Other - LT1129IQ-2
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LT1129IQ Details

  • Manufacturer Part Number:

    LT1129IQ

  • Part Life Cycle Code:

    Obsolete

  • Package Description:

    PLASTIC, D2PAK-5

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    0

  • Adjustability:

    ADJUSTABLE

  • Dropout Voltage1-Max:

    0.7 V

  • Dropout Voltage1-Nom:

    0.45 V

  • JESD-30 Code:

    R-PSSO-G5

  • JESD-609 Code:

    e0

  • Length:

    10.2235 mm

  • Line Regulation-Max (%/V):

    0.24

  • Load Regulation-Max(%):

    0.78%

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Outputs:

    1

  • Number of Terminals:

    5

  • Operating Temperature TJ-Max:

    125 °C

  • Operating Temperature TJ-Min:

    -40 °C

  • Output Current1-Max:

    0.7 A

  • Output Voltage1-Max:

    30 V

  • Output Voltage1-Min:

    3.8 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    TO-263

  • Package Equivalence Code:

    SMSIP5H,.6,67TB

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Qualification Status:

    Not Qualified

  • Regulator Type:

    ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR

  • Seated Height-Max:

    4.877 mm

  • Surface Mount:

    YES

  • Technology:

    BIPOLAR

  • Terminal Finish:

    TIN LEAD OVER NICKEL

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.702 mm

  • Terminal Position:

    SINGLE

  • Width:

    8.89 mm

LT1129IQ Frequently Asked Questions (FAQs)

  • The LT1129IQ is a high-frequency device, and proper layout and placement are crucial. It is recommended to keep the input and output traces short and away from each other, use a solid ground plane, and place the device close to the power supply decoupling capacitors. Additionally, it is recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
  • To ensure stability, it is essential to follow the recommended compensation network and component values, as specified in the datasheet. Additionally, the output capacitor should be chosen carefully to ensure it meets the required ESR and capacitance values. It is also recommended to add a small resistor (e.g., 10Ω) in series with the output capacitor to prevent oscillation.
  • The LT1129IQ has an absolute maximum input voltage rating of 18V. However, the recommended maximum input voltage is 15V to ensure reliable operation and to prevent damage to the device.
  • The LT1129IQ is rated for operation up to 125°C junction temperature. However, the device's performance and reliability may degrade at high temperatures. It is recommended to derate the device's output current and voltage ratings at high temperatures to ensure reliable operation.
  • The LT1129IQ has built-in overcurrent protection, but it is still recommended to add external protection circuitry, such as a fuse or a current-limiting resistor, to prevent damage from excessive current. Additionally, it is recommended to add overvoltage protection, such as a zener diode or a voltage clamp, to prevent damage from excessive voltage.

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LT1129IQ 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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