Hello
I was trying to figure out the power dissipation of the LM27761 in our circuit. For our design, VIN = +5.5V, Vout = -2.5V and Iout = 62mA
In the datasheet, PD = PIN – POUT = [VIN × (–IOUT + IQ) – (VOUT × IOUT)]
= [+5.5V × (–(62mA) + 410uA) – ((-2.5) × 62mA)] where IQ @ 5.5V = 410uA
= [+5.5V × (–61.59mA) – ((-2.5) × 62mA)] = [-338mW - (-155mW)]
= -183mW
Is this correct? Is it supposed to be negative? Something about the negative sign in Equation 3 seems wrong.
Please assist.
Thanks.
