Rainbow-electronics MAX1558H Manual de usuario descargar pdf (Pagina 11)

For a 5V input and 1V output, the maximum possible

power dissipation per switch is:

P = 0.5 x (1.5A) x (5V - 1V) = 3W

Since the package power dissipation is limited to

1952mW, the MAX1558/MAX1558H die temperature

exceeds the thermal-shutdown threshold and the

switch turns off. After the die temperature cools by

10°C, the switch turns on again. If the fault-overload

condition continues, the switch cycles on and off with a

duty cycle and period that is a function of the ambient

temperature and PC board layout.

A short across the output for more than 20ms places

the part in autoreset mode. With V

IN_

= 5V and an

autoreset test current of 30mA, the power dissipation

for a short-circuited output is given by:

P = (30mA) x 5V = 0.15W

MAX1558/MAX1558H

Dual, 3mm x 3mm, 1.2A/Programmable-Current

USB Switches with Autoreset

______________________________________________________________________________________ 11

Chip Information

TRANSISTOR COUNT: 2932

PROCESS: BiCMOS

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Rainbow-electronics MAX1558H Manual de usuario Pagina 11