LTC4244-1 Linear Technology, LTC4244-1 Datasheet - Page 9

• Manufacturer Part Number: LTC4244-1
• Description: CompactPCI Bus Hot Swap Controllers
• Manufacturer: Linear Technology

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PI FU CTIO S
3.3V
age lockout circuit prevents the switches from turning on
when the voltage at the 3.3V
3.3V input supply is available, short the 3.3V
5V
3.3V
Output Supply Voltage. The PWRGD pin cannot pull low
until the 3.3V
supply is available, tie the 3.3V
200
when the power switches are turned off.
IN
U
IN
OUT
pin.
active pull-down discharges 3.3V
(Pin 17): 3.3V Supply Sense Input. An undervolt-
(Pin 18): Analog Input Used to Monitor the 3.3V
U
OUT
pin voltage exceeds 2.9V. If no 3.3V input
U
IN
OUT
pin is less than 2.5V. If no
pin to the 5V
OUT
IN
to ground
OUT
pin to the
pin. A
V
connected between V
than –11.1V before the PWRGD pin pulls low. The V
power good comparator is disabled for the LTC4244-1. A
390 active pull-up discharges V
the power switches are turned off.
12V
connected between 12V
exceed 11.1V before the PWRGD pin can pull low. A 440
active pull-down discharges 12V
power switches are turned off.
EEOUT
OUT
(Pin 19): -12V Supply Output. A 1
(Pin 20): 12V Supply Output. A 0.5 switch is
LTC4244/LTC4244-1
EEIN
and V
IN
and 12V
EEOUT
OUT
EEOUT
. V
to ground when the
OUT
EEOUT
to ground when
. 12V
must be less
OUT
switch is
EEOUT
must
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