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PM6685TR - STMicroelectronics

Description: Dual step-down main supply controller with auxilary voltages for notebook system power

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PM6685TR - STMicroelectronics - PCB symbol
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PM6685TR - STMicroelectronics PCB footprint - Quad Flat No-Lead - Quad Flat No-Lead - VFQFPN 5x5x1.0 32L pitch 0.50 package dimensions....
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PM6685TR - STMicroelectronics - 3D model - Quad Flat No-Lead - VFQFPN 5x5x1.0 32L pitch 0.50 package dimensions....
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PM6685TR Details

  • Manufacturer Part Number:

    PM6685TR

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Obsolete

  • Part Package Code:

    QFN

  • Package Description:

    5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, VFQFPN-32

  • Pin Count:

    32

  • Manufacturer Package Code:

    VFQFPN

  • ECCN Code:

    EAR99

  • HTS Code:

    8542.39.00.60

  • Manufacturer:

    STMicroelectronics

  • YTEOL:

    0

  • Analog IC - Other Type:

    DUAL SWITCHING CONTROLLER

  • Control Mode:

    VOLTAGE-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-XQCC-N32

  • JESD-609 Code:

    e3

  • Length:

    5 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    32

  • Operating Temperature-Max:

    85 °C

  • Package Body Material:

    UNSPECIFIED

  • Package Code:

    VQCCN

  • Package Equivalence Code:

    LCC32,.2SQ,20

  • Package Shape:

    SQUARE

  • Package Style:

    CHIP CARRIER, VERY THIN PROFILE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1 mm

  • Surface Mount:

    YES

  • Switcher Configuration:

    PUSH-PULL

  • Switching Frequency-Max:

    500 kHz

  • Temperature Grade:

    COMMERCIAL EXTENDED

  • 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:

    5 mm

PM6685TR Frequently Asked Questions (FAQs)

  • STMicroelectronics provides a recommended PCB layout in the application note AN2345, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
  • The input capacitor values depend on the input voltage, output voltage, and switching frequency. A general guideline is to use a minimum of 10uF ceramic capacitors with a voltage rating of at least 1.5 times the input voltage. However, it's recommended to consult the application note AN2345 and perform simulations to determine the optimal capacitor values for your specific design.
  • The maximum allowed voltage drop across the internal FETs is not explicitly stated in the datasheet. However, according to STMicroelectronics' support, the recommended maximum voltage drop is around 1.5V to ensure reliable operation and minimize power losses.
  • The PM6685TR is rated for operation up to 150°C, but it's essential to consider the derating curves and thermal management guidelines provided in the datasheet and application note AN2345 to ensure reliable operation in high-temperature environments.
  • STMicroelectronics provides a troubleshooting guide in the application note AN2345, which covers common issues, such as startup problems, oscillations, and overcurrent protection. Additionally, engineers can use oscilloscopes and logic analyzers to debug and analyze the PM6685TR's behavior.

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PM6685TR Overview

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About STMicroelectronics

STMicroelectronics (ST) is a global semiconductor company that designs, manufactures, and markets a broad range of integrated circuits (ICs), discrete devices, and other electronic components. STMicroelectronics offers a diverse portfolio of semiconductor products covering a wide range of applications and industries. Their product categories include microcontrollers, analog and mixed-signal ICs, MEMS (Micro-Electro-Mechanical Systems) sensors, power management ICs, RF (Radio Frequency) transceivers, aut

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