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LM2651 Design document

Chirag Rasputla
Prodigy 190 points 
Hello,
        Planning to use LM2651 regulator but the datasheet does not mention inductor and capacitor selection chart for various output voltages and currents as other datasheets contain. 
Can anyone please provide selection document if available for LM2651 regulator.

System Requirements:
Input Voltage : 9VDC
Output : 5VDC
Load current max: 500mA

Thanks & Regards,
Chirag

  • 0
    TI__Genius 16025 points

    HI Chirag,

    Not all parts come with a selection document, simply because some parts can accept a far greater range of passive component options. In the absence of one, design equations are always provided as a guide.

    For your design, the recommended inductance is 68uH. with a current rating of 0.8A Irms.

    The output capacitor equations are in the datasheet as well, equation 3. I've assumed Iripple to be 25% at 0.2A for all calculations.

    Thanks,

    Anston

  • 0 in reply to Anston Lobo
    Prodigy 190 points

    ok thanks Mr.Anston, will implement in the design.

    Regards,

    Chirag