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L9177A - STMicroelectronics

Description: Automotive engine management control IC for small engines

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L9177A - STMicroelectronics - PCB symbol
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PCB Footprints
L9177A - STMicroelectronics PCB footprint - Quad Flat Packages - Quad Flat Packages - TQFP 10x10 64L exposed pad down package mechanical data
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3D Models
L9177A - STMicroelectronics - 3D model - Quad Flat Packages - TQFP 10x10 64L exposed pad down package mechanical data
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L9177A Details

  • Manufacturer Part Number:

    L9177A

  • Brand Name:

    STMicroelectronics

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Package Description:

    TQFP-64

  • ECCN Code:

    EAR99

  • Manufacturer:

    STMicroelectronics

  • Interface IC Type:

    INTERFACE CIRCUIT

  • JESD-30 Code:

    S-PQFP-G64

  • JESD-609 Code:

    e3

  • Length:

    10 mm

  • Moisture Sensitivity Level:

    3

  • Number of Functions:

    1

  • Number of Terminals:

    64

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    HTFQFP

  • Package Equivalence Code:

    TQFP64,.47SQ,20

  • Package Shape:

    SQUARE

  • Package Style:

    FLATPACK, HEAT SINK/SLUG, THIN PROFILE, FINE PITCH

  • Peak Reflow Temperature (Cel):

    260

  • Screening Level:

    AEC-Q100

  • Seated Height-Max:

    1.2 mm

  • Supply Voltage-Max:

    18 V

  • Supply Voltage-Min:

    6 V

  • Supply Voltage-Nom:

    12 V

  • Surface Mount:

    YES

  • Technology:

    BCDMOS

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    0.5 mm

  • Terminal Position:

    QUAD

  • Width:

    10 mm

L9177A Frequently Asked Questions (FAQs)

  • A good PCB layout for the L9177A involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the length of the traces carrying high-frequency signals. It's also recommended to use a shielded inductor and to keep the switching node (SW) away from sensitive analog circuits.
  • The inductor value depends on the input voltage, output voltage, and switching frequency. A good starting point is to use the inductor value recommended in the datasheet (e.g., 2.2 μH). Then, adjust the value based on the specific application requirements, such as output voltage ripple and efficiency.
  • The L9177A is rated for operation from -40°C to 150°C (junction temperature). However, the maximum ambient temperature range depends on the specific application and the thermal design of the system. A good rule of thumb is to derate the junction temperature by 10°C to 20°C to ensure reliable operation.
  • To ensure stability, make sure to follow the recommended component values and PCB layout guidelines. Also, ensure that the input and output capacitors are of high quality and have low ESR. Additionally, add a small capacitor (e.g., 10 nF) between the FB pin and GND to improve stability.
  • Yes, the L9177A can be used in a synchronous rectification configuration. However, this requires additional external components, such as a synchronous rectifier FET and a dedicated driver. The L9177A's internal switch can be used as the high-side switch, and the synchronous rectifier FET can be used as the low-side switch.

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L9177A 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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