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RT7257BHZSP - RICHTEK

Description: RICHTEK - RT7257BHZSP - DC-DC Switching Buck Step Down Regulator, Adjustable, 4.5V-15Vin, 800mV-12Vout, 3Aout, SOP-8

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RT7257BHZSP - RICHTEK - PCB symbol
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RT7257BHZSP - RICHTEK PCB footprint - Small Outline Packages - Small Outline Packages - RT7257BHZSP
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RT7257BHZSP - RICHTEK - 3D model - Small Outline Packages - RT7257BHZSP
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RT7257BHZSP Details

  • Manufacturer Part Number:

    RT7257BHZSP

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    PSOP-8

  • Manufacturer Package Code:

    PSOP-8

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    Richtek Technology Corp

  • Analog IC - Other Type:

    SWITCHING REGULATOR

  • Control Mode:

    CURRENT-MODE

  • JESD-30 Code:

    R-PDSO-G8

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    3 A

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Qualification Status:

    Not Qualified

  • Surface Mount:

    YES

  • Switching Frequency-Max:

    1400 kHz

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

RT7257BHZSP Frequently Asked Questions (FAQs)

  • A 4-layer PCB with a solid ground plane and thermal vias is recommended. Keep the switching node (SW) away from sensitive analog nodes, and use a thermal relief pattern under the IC to improve heat dissipation.
  • Use a high-precision voltage reference, such as a 0.5% or better resistor divider network, and ensure the feedback resistors are 1% or better. Additionally, minimize noise and ripple on the output voltage by using a low-ESR output capacitor.
  • A low-ESR, X5R or X7R ceramic capacitor with a value of 4.7uF to 10uF is recommended. This helps to filter input noise and reduce voltage ripple.
  • Ensure the output capacitor is properly sized and has a low ESR. Add a small ceramic capacitor (e.g., 100nF) in parallel with the output capacitor to improve stability. Also, minimize the distance between the output capacitor and the IC.
  • The RT7257BHZSP is rated for operation up to 85°C ambient temperature. However, for reliable operation, it's recommended to keep the ambient temperature below 70°C to ensure a sufficient margin for thermal derating.

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RT7257BHZSP Overview

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