MIC5231-2.75BM5 MICREL [Micrel Semiconductor], MIC5231-2.75BM5 Datasheet - Page 6

• Manufacturer Part Number: MIC5231-2.75BM5
• Description: Micropower ?Cap LDO Regulator Preliminary Information
• Manufacturer: MICREL [Micrel Semiconductor]

MIC5231
dissipation allowed can easily be determined.
Therefore, the device can only dissipate 170mW maximum.
If the MIC5231 is powered off of a 12V source and the output
voltage is 3.3V, the maximum output current can be calcu-
lated.
Therefore, the device can source almost 20mA at an ambient
of 85°C before the die temperature exceeds 125°C.
MIC5231
P
P
P
170mW = (12V - 3.3V)·Iout
Iout = 170mW/8.7V
Iout = 19.5mA
D(max)
D(max)
D
= (Vin - Vout)·Iout
= (125°C – 85°C)/235°C/W
= 170mW
6
June 2000
Micrel