Because the package power dissipation is 1951mW, the

MAX8586 die temperature exceeds the +160°C thermal-

shutdown threshold when dissipating 7.2W, and the

switch output shuts down until the junction temperature

cools by 15°C. The duty cycle and period are strong

functions of the ambient temperature and the PC board

layout (see the

Thermal Shutdown section).

If the output current exceeds the current-limit threshold,

or the output voltage is pulled below the short-circuit

detect threshold, the MAX8586 enters a fault state after

20ms, at which point auto-restart mode is enabled and

25mA is sourced by the output to test for removal of the

overload. For a 5V input, OUT short circuited to GND,

and auto-restart mode active, the power dissipation is

as follows:

P = 0.025A x 5V = 0.125W

Single 1.2A USB Switch in

3mm x 3mm TDFN

10

______________________________________________________________________________________

Chip Information

TRANSISTOR COUNT: 2117

PROCESS: BiCMOS

INPUT SUPPLY

2.75V TO 5.5V

OUTPUT

FAULT

INDICATOR

ON/OFF

POLARITY

SELECTION

CONTROL/

ON/OFF

OUTPUT SUPPLY

UP TO 1.2A

IN

OUT

ENRESET

ISET

FAULT

MAX8586

SEL

ON

GND

AUTO-RESTART

ON/OFF

R2

26k

Ω

R1

100k

Ω

C2

1

μF

C1

1

μF

Figure 1. Typical Application Circuit

SEL

ISET

ON

IN

ENRESET

GND

FAULT

OUT

MAX8586

TDFN

8

7

5

1

2

6

3

4

TOP VIEW

Pin Configuration