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ISL9444IRZ - Renesas Electronics

Description: The ISL9444 is a triple-output synchronous buck controller that integrates three PWM controllers which are fully featured and designed to provide multi-rail power for use in products such as cable and satellite set-top boxes, VoIP gateways, cable modems, and other home connectivity products as well as a variety of industrial and general purpose applications. Each output is adjustable down to 0. 7V. The PWMs are synchronized at 180° out-of-phase, thus reducing the input RMS current and ripple voltage. The IS

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ISL9444IRZ - Renesas Electronics - PCB symbol
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PCB Footprints
ISL9444IRZ - Renesas Electronics PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - 40 Ld 5x5 QFN
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3D Models
ISL9444IRZ - Renesas Electronics - 3D model - Quad Flat No-Lead - 40 Ld 5x5 QFN
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ISL9444IRZ Details

  • Manufacturer Part Number:

    ISL9444IRZ

  • Brand Name:

    Renesas

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    QFN

  • Package Description:

    QFN-40

  • Pin Count:

    40

  • Manufacturer Package Code:

    L40.5X5B

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    4 Weeks

  • Manufacturer:

    Renesas Electronics Corporation

  • YTEOL:

    0

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    28 V

  • Input Voltage-Min:

    4.5 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    S-PQCC-N40

  • JESD-609 Code:

    e3

  • Length:

    5 mm

  • Moisture Sensitivity Level:

    2

  • Number of Functions:

    1

  • Number of Terminals:

    40

  • Operating Temperature-Max:

    85 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Voltage-Min:

    0.7 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC40,.2SQ,16

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Seated Height-Max:

    1 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    BUCK

  • Switching Frequency-Max:

    1320 kHz

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.4 mm

  • Terminal Position:

    QUAD

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

    30

  • Width:

    5 mm

ISL9444IRZ Frequently Asked Questions (FAQs)

  • Renesas provides a recommended PCB layout guide in their application note AN1995, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
  • The inductor value selection depends on the output voltage, output current, and switching frequency. Renesas provides an inductor selection guide in their application note AN1995, which includes a formula to calculate the recommended inductor value based on these parameters.
  • The ISL9444IRZ has a maximum ambient temperature rating of 105°C, but it can be derated to 85°C for high-reliability applications. It's essential to consider the thermal management and heat dissipation in the system design to ensure reliable operation.
  • The ISL9444IRZ is designed to meet the vibration requirements of automotive and industrial applications. However, it's essential to follow the recommended PCB layout and component mounting guidelines to ensure the device can withstand the vibration levels in your specific application.
  • Renesas provides a troubleshooting guide in their application note AN1995, which includes steps to identify and resolve common issues, such as oscillations, instability, or overvoltage protection. Additionally, Renesas offers technical support and simulation tools to help engineers debug and optimize their designs.

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ISL9444IRZ Overview

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