Hai Team,
we have question on this part TLV7101828-Q1 .If we Vin is 3V3 ,what is output of 1V8 and 2V8
can we except same 200 mA in each rails or it differs.
Hi Rakshith,
With Vin=3.3V, the output of 1V8 = 1.8V and the output of 3V3 = 3.3V.
Both outputs can handle up to 200mA load each. Depending on what load you put on each output, the output currents could differ or could be the same.
At what ambient temperature are you planning to run this device at? At room ambient temperature (20-25C), your setup is fine. However, you need to consider the thermal aspect if you plan to run the device at higher ambient temperatures.
The device is spec'd at Tj=-40C to 125C.
To calculate the max ambient temperature (Ta_max) where this device can be safely run, with your conditions above, without violating the specs:
Tj_max = Rthetaja x Pd + Ta_max (see below table for Rthetaja for this device)
1V8 max power dissipation approx (Pd) = (Vin-Vout)*Iout = (3.3-1.8)*0.2 = 0.3W
2V8 max power dissipation approx (Pd) = (Vin-Vout)*Iout = (3.3-2.8)*0.2 = 0.1W
Total Pd = 0.3+0.1 = 0.4W
Ta_max = Tj_max - (Rtherja x Pd) = 125C - (0.4W x 190.5C/W)
Ta_max = 125C - 76.2C = 48.8C
the link below is almost similar question as yours but more related to thermal consideration.
Regards,
Chito
