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LMQ62440-Q1: LMQ62440-Q1 vs. MPQ9840GL-AEC1

Kygo Cheng
Expert 6830 points
Part Number: LMQ62440-Q1

Hi,

I want to use LMQ62440-Q1 to replace MPQ9840GL-AEC1. Could you provide a comparison table between the two?

  • 0
    TI__Guru 50120 points

    Hi Kygo,

    Please provide the appropriate datasheet for the MPQ9840GL-AEC1 as an attachment so I can take a look it for comparison. 

    I was not able to find the associated competitor part on Digikey or Mouser.

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    TI__Expert 6830 points

    Hi Jimmy ,

    Thank you

    36V, 3.5A, Low IQ, Synchronous Step-Down Converter AEC-Q100 Qualified

    Description

    The MPQ9840 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution that achieves 3.5A of continuous output current with excellent load and line regulation over a wide 3.3V to 36V input supply range. The switching frequency can be programmed or synchronized to an external clock in the range of 350kHz to 2.5MHz. The synchronous operation and ultra-low 14μA sleep mode quiescent current provide high efficiency over the output current load range, allowing the MPQ9840 to be used in a variety of step-down applications in automotive input environments and battery-powered applications.

    Peak-current-mode operation provides fast transient response and eases loop stabilization. The excellent low dropout performance allows the MPQ9840 to be used in high duty cycle applications.

    Full protection features include over-current protection (OCP), short-circuit protection (SCP), and thermal shutdown. An open-drain power good (PG) signal indicates when the output is within 10% of its nominal voltage.

    The MPQ9840 is available in a space-saving QFN-16 (3mmx4mm) package.

    Features & Benefits

    • 2μA Low Shutdown Supply Current
    • 14μA No-Load Quiescent Current
    • Internal 125mΩ High-Side and 55mΩ Low-Side MOSFET
    • 350kHz to 2.5MHz Programmable Switching Frequency
    • Power Good (PG) Output
    • External Soft Start (SS)
    • 80ns Minimum On Time
    • Selectable Forced CCM and AAM
    • Hiccup Over-Current Protection (OCP)
    • AEC-Q100 Grade-1
    • Available in a QFN-16 (3mmx4mm) Package

  • 0 in reply to Kygo Cheng
    TI__Guru 50120 points

    Hi Kygo,

    Is this part out in the market yet? Again having a datasheet with actual efficiency curves would be very beneficial for an apple-to-apple comparison between the existing TI device (LMQ62440-Q1) and this MPQ device.

    Do you not have access to this competitor device's datasheet? 

    If not then I will compare it simply based on the front page of TI's device versus this device. I doubt you can get much out of it but if you can't provide the competitor datasheet, this is all I can base the comparison off of.

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    TI__Expert 6830 points

    Hi Jimmy ,

    Yes, MPQ9840GL  is out in the market !

    I tried to get more information(datasheet) , but it failed.

    Please help to make a preliminary comparison, THX

  • +1 in reply to Kygo Cheng
    TI__Guru 50120 points

    Hi Kygo,

    Please see preliminary comparison below: 

    Some highlights are that LMQ62440-Q1 has lower internal FET Rdson meaning there will be less conduction and switching losses compared to competitor MPQ.   

    LMQ62440-Q1 MPQ9840
    VIN Range 3-V to 36-V  3.3-V to 36-V
    IOUT (rated) 4A 3.5A
    Frequency range 200kHz to 2.2MHz 350kHz to 2.5MHz
    Internal FETs (High-side/Low-side) 41mΩ / 21mΩ 125mΩ / 55mΩ
    MODE ADJ (FPWM and Auto/PFM) ADJ (FCCM and AAM)
    Size 4 mm x 3.5mm  3 mm x 4 mm 
    Shutdown current 0.6uA (typ) 2uA
    No-load quiescient current 7uA (3.3V) ; 10uA (5V)  14uA 
    Features Integrated HF caps, BIAS, RBOOT, Spread-Spectrum, PG, SYNC BIAS, External SS, PG, SYNC

    Hope this helps give some insight on our TI LMQ62440-Q1 versus MPQ9840.

    Regards,

    Jimmy 

  • 0 in reply to Jimmy Hua
    TI__Expert 6830 points

    Hi Jimmy ,

    Than you for your help

  • 0 in reply to Kygo Cheng
    TI__Guru 50120 points

    Thanks for using the E2E forum.