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ISL85403FRZ - Renesas Electronics

Description: The ISL85403 is a 40V, 2. 5A synchronous buck or boost-buck controller with an integrated high-side MOSFET and low-side driver. In Buck mode, the ISL85403 supports a wide input range of 3V to 40V. In Boost-Buck mode, the input range can be extended down to 2. 5V and output regulation can be maintained when VIN drops below VOUT, enabling sensitive electronics to remain on in low input voltage conditions. The ISL85403 has a flexible selection of Forced PWM mode and PFM mode. In PFM mode, the quiescent input c

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ISL85403FRZ - Renesas Electronics PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - L20.4x4C-1
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ISL85403FRZ - Renesas Electronics  - 3D model - Quad Flat No-Lead - L20.4x4C-1
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ISL85403FRZ Details

  • Manufacturer Part Number:

    ISL85403FRZ

  • Brand Name:

    Renesas

  • Pbfree Code:

    Yes

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    QFN

  • Package Description:

    QFN-20

  • Pin Count:

    20

  • Manufacturer Package Code:

    L20.4X4C

  • Country Of Origin:

    Malaysia

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Factory Lead Time:

    18 Weeks

  • Date Of Intro:

    2017-10-23

  • Manufacturer:

    Renesas Electronics Corporation

  • YTEOL:

    8

  • Additional Feature:

    ALSO OPERATES IN PFM CONTOL TECHNIQUE

  • Analog IC - Other Type:

    SWITCHING CONTROLLER

  • Control Mode:

    CURRENT-MODE

  • Control Technique:

    PULSE WIDTH MODULATION

  • Input Voltage-Max:

    40 V

  • Input Voltage-Min:

    3 V

  • Input Voltage-Nom:

    12 V

  • JESD-30 Code:

    S-PQCC-N20

  • JESD-609 Code:

    e3

  • Length:

    4 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    20

  • Operating Temperature-Max:

    105 °C

  • Operating Temperature-Min:

    -40 °C

  • Output Current-Max:

    4.2 A

  • Output Voltage-Min:

    0.8 V

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HVQCCN

  • Package Equivalence Code:

    LCC20,.16SQ,20

  • 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-BOOST

  • Switching Frequency-Max:

    2530 kHz

  • Temperature Grade:

    INDUSTRIAL

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    NO LEAD

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

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

    30

  • Width:

    4 mm

ISL85403FRZ Frequently Asked Questions (FAQs)

  • A good PCB layout for the ISL85403FRZ involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the traces between the IC and the capacitors. Additionally, it's recommended to use a separate analog and digital ground plane to reduce noise coupling.
  • To ensure stability and prevent oscillations, it's essential to follow the recommended component values and PCB layout guidelines. Additionally, make sure to use a sufficient output capacitor with a low ESR, and consider adding a small series resistor (e.g., 1-2 ohms) between the output capacitor and the load to dampen oscillations.
  • The ISL85403FRZ has an absolute maximum input voltage rating of 18V. However, the recommended maximum operating input voltage is 15V to ensure reliable operation and prevent damage to the IC.
  • The ISL85403FRZ is rated for operation up to 125°C junction temperature. However, the IC's performance and reliability may degrade at high temperatures. It's essential to follow the recommended operating conditions and consider derating the IC's performance at high temperatures.
  • The output voltage of the ISL85403FRZ can be calculated using the following formula: VOUT = VREF x (1 + R1/R2), where VREF is the internal reference voltage (1.25V), and R1 and R2 are the resistors in the feedback network.

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ISL85403FRZ Overview

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