LTC1644CGN#TR Linear Technology, LTC1644CGN#TR Datasheet - Page 8

• Manufacturer Part Number: LTC1644CGN#TR
• Description: IC CONTROLLER HOT SWAP 20-SSOP
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LTC1644CGN#TR

• Applications: CompactPCI™
• Internal Switch(s): No
• Voltage - Supply: 3.3V, 5V, ±12V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP (0.154", 3.91mm Width)
• Family Name: LTC1644
• Package Type: SSOP N
• Operating Supply Voltage (min): 2.75/10.8/-10.8V
• Operating Supply Voltage (max): 13.2/-14V
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Product Depth (mm): 3.99mm
• Product Height (mm): 1.5mm
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LTC1644CGNTR

LTC1644
PI FU CTIO S
12V
nected between 12V
limit. An undervoltage lockout circuit prevents the switches
from turning on while the 12V
8.3V. 12V
circuitry.
V
nected between V
limit. If no V
the GND pin in order to disable the V
function.
8
TYPICAL PERFOR A CE CHARACTERISTICS
EEIN
8O
90
70
60
50
40
30
20
10
U
0
–50
IN
3V
vs Temperature
(Pin 2): –12V Supply Input. A 1 switch is con-
(Pin 1): 12V Supply Input. A 0.5 switch is con-
OUT
–25
IN
U
Discharge Resistance
also provides power to the LTC1644’s internal
EE
TEMPERATURE ( C)
supply input is available, tie the V
0
EEIN
0.30
0.25
0.20
0.15
0.10
0.05
25
IN
0
–50
U
V
and V
and 12V
I = 3mA
OL
50
vs Temperature
–25
EEOUT
W
75
OUT
TEMPERATURE ( C)
1644 G37
IN
0
pin voltage is less than
U
100
with a foldback current
FAULT
with a foldback current
25
RESETOUT
EEOUT
PWRGD
50
700
600
500
400
300
200
100
0
power good
–50
12V
vs Temperature
75
EEIN
1644 G40
OUT
–25
100
pin to
Discharge Resistance
TEMPERATURE ( C)
0
25
5V
pull low until the 5V
input supply is available, tie the 5V
in order to disable the 5V
TIMER (Pin 4): Current Fault Inhibit Timing Input. Connect
a capacitor from TIMER to GND. With the chip turned off
(OFF/ON = HIGH), the TIMER pin is internally held at GND.
When the chip is turned on, a 21 A pull-up current source
is connected to TIMER. Current limit faults will be ignored
until the voltage at the TIMER pin rises to within 1V of
12V
OUT
IN
50
1.005
1.004
1.003
1.002
.
(Pin 3): 5V Output Sense. The PWRGD pin will not
–50
75
Precharge Reference Voltage
vs Temperature
V
5VIN
1644 G38
–25
100
= 5V
TEMPERATURE ( C)
0
OUT
80O
900
700
600
500
400
300
200
100
pin voltage exceeds 4.62V. If no 5V
0
25
–50
V
vs Temperature
OUT
EEOUT
50
–25
power good function.
Discharge Resistance
TEMPERATURE ( C)
75
OUT
0
1644 G41
pin to the 3V
100
25
50
75
OUT
1644 G39
1644f
pin
100