Friends.
I designed an external device for Android phones, but i am in trouble with temperature. I am getting power from phone's OTG output voltage (5V)
My device needs only 3.0 volts and 0.4 Amper maximum. I used many 5V to 3V adjustible regulators but i am not happy with temperature of device, it is about 60-65 degrees celsius.
I used 3A, 5A and 7A regulators, but i can't solve temperature problem from 5V to 3V. Than i add 2 pieces serial Diodes to front side of device. 2 pieces diodes droped the voltage to 5V > 4.3V and than 4.3V > 3.6V.
Regulator has better temperature after the 2 diodes, but now 2 diodes are hot now. I am using 600V 16A and 400V 30A diodes. Both are TO263AC and D2PAK package types.
Anybody know a good solution for for 5V to 3V and 0.4A requirement without temperature problem. I ordered hundred type component from Digikey but i didn't find suitable solution already.
Many thanks for your comments...
I designed an external device for Android phones, but i am in trouble with temperature. I am getting power from phone's OTG output voltage (5V)
My device needs only 3.0 volts and 0.4 Amper maximum. I used many 5V to 3V adjustible regulators but i am not happy with temperature of device, it is about 60-65 degrees celsius.
I used 3A, 5A and 7A regulators, but i can't solve temperature problem from 5V to 3V. Than i add 2 pieces serial Diodes to front side of device. 2 pieces diodes droped the voltage to 5V > 4.3V and than 4.3V > 3.6V.
Regulator has better temperature after the 2 diodes, but now 2 diodes are hot now. I am using 600V 16A and 400V 30A diodes. Both are TO263AC and D2PAK package types.
Anybody know a good solution for for 5V to 3V and 0.4A requirement without temperature problem. I ordered hundred type component from Digikey but i didn't find suitable solution already.
Many thanks for your comments...
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