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Part Number: LM350K STEEL/NOPB (unable to select)
Dropout voltage of LM350K STEEL/NOPB @ 3A output current.
whats the minimum voltage i can give to get 5.0 V @ 3 A
other device with 5 volt adjustable output @ 3A, TO-3 STEEL package.least possible dropout voltage.
The LM350 Minimum Operating Vin to ensure 3A output = Vout+3V = 5.0V+3.0V = 8.0V
That will cause 6W (3A x 3V) to be dissipated in the K (TO-3 / NDS) package. A heat sink will be needed.
I do suggest that you consider a Buck SMPS as it will give superior efficiency (less heat).
If a linear regulator is required, here are some options with lower Vin to Vout requirements:
LM1084 - 5A Low Dropout Positive Regulators
LM1085 - 3A Low Dropout Positive Regulators
LP3856 - 3A Fast Ultra Low Dropout Linear Regulator
LP3873 - 3A Fast Ultra Low Dropout Linear Regulator
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In reply to Donald Jones:
Thanks for the reply Donald Jones
Thanks for the suggestion. SUGGESTION you have made is the cause this question rose to us. The constraint to us is we already have a board made with LM350K STEEL/NOPB (TO-3 STEEL) Metal Can Package, with input voltage 9.0 V. We are in plan to insert a PCB with SMPS (BUCK) & reduce 9.0 v to minimum possible, before supplying 9.0 V to LM350K STEEL/NOPB. since the Board already present cannot be changed can i get any device with lesser drop out but (TO-3 STEEL) Metal Can Package
can i get a graph of Dropout voltage or (minimum required) vs current driven for LM350K STEEL/NOPB.??
In reply to MADIWALESH PATTAR:
" ... can i get a graph of Dropout voltage ..."
Yes, from the LM350 datasheet ...
can i get any device with lesser drop out but (TO-3 STEEL) Metal Can Package
List of every TI regulator in the TO-3 package that can deliver at least 3A:
LM138 5-Amp Adjustable Regulator
LM338 5-Amp Adjustable Regulator
LM323 3-Amp, 5-Volt Positive Regulator
LM350 3-Amp Adjustable Regulator
Looks like the LM323 is just a bit lower.
Thank you. will have a look into it.
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