__________Applications Information

Bypassing and Grounding Considerations

Voltage transients exceeding 500mV at 25V/µs may

trigger a false interrupt and thermal-shutdown indica-

P-Channel/N-Channel Load Switch

with Controlled Turn-On

For a more controlled voltage-switching application,

add a series resistor to slow the switch turn-on time.

The external MOSFET gate has typical capacitance of

150pF to 2000pF, but an optional external capaci-

tance can be added to further slow the switching time

(Figure 6).

Serial-to-Parallel/Parallel-to-Serial Converters and

Load-Switch Controllers with SMBus Interface

______________________________________________________________________________________

11

MAX1662

MAX1663

I/O1

TO/FROM

HOST

+5V

I/O3

I/O2

GND

LOAD1

LOAD2

LOAD3

ALERT

0.1

µF

0.01

µF*

0.01

µF*

0.01

µF*

0.01

µF*

0.01

µF*

0.01

µF*

IRF7406

IRF7413

IRF7406

IRF7413

IRF7406

IRF7413

+12V

10k

10k

10k

SMBCLK

SMBDATA

SMBSUS

ADD

MAX1661

I/O1

TO/FROM

HOST

+5V

I/O3

I/O2

GND

LOAD1

LOAD2

LOAD3

ALERT

0.1

µF

10k

100

Ω*

100

Ω*

10k

10k

10k

10k

10k

10k

10k

10k

200k

200k

200k

200k

200k

200k

SMBCLK

SMBDATA

SMBSUS

ADD

*OPTIONAL

Figure 6. Load Switch with Controlled Turn-On