LTC1643AL-1IGN#TRPBF Linear Technology, LTC1643AL-1IGN#TRPBF Datasheet - Page 13

• Manufacturer Part Number: LTC1643AL-1IGN#TRPBF
• Description: IC CTRLR HOTSWAP PCI BUS 16SSOP
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LTC1643AL-1IGN#TRPBF

• Applications: CompactPCI™
• Internal Switch(s): No
• Voltage - Supply: 3.3V, 5V, ±12V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP (0.150", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS
circuit, PCI bridge chip and the LOCAL_PCI_RESET# logic
circuitry. The BD_SEL# signal is connected to the ON pin
while the PWRGD pin is connected to the HEALTHY#
signal. The HEATHLY# signal is combined with the
PCI_RESET# signal to generate the LOCAL_PCI_RESET#
signal. Capacitors C6 and C7 provide chip bypassing on
the 12V and –12V inputs. Diode D2 protects the part from
voltage surges below –13.2V on the –12V supply.
The 1V precharge voltage for the data bus lines is gener-
ated by an LT1117 low dropout regulator. The output of the
LT1117 is set to 1.8V, then the voltage is dropped by a
1N4148 diode to generate 1V. The precharge circuit is
capable of sourcing and sinking 40mA.
LONG GND
HEALTHY#
MED 3.3V
PCI_RST#
BD_SEL#
MED 5V
–12V
12V
I/O
R12 3Ω 5%
* BZX84C15 (SOT-23)
†
V(I/O)
VALUE MAY VARY FOR BACKPLANES WITHOUT BYPASS CAPACITANCE
R11
10Ω
5%
R13
2k
5%
C6
0.1µF
†
U
C5
0.1µF
D2*
12V
D3*
12V
INFORMATION
V(I/O)
U
V(I/O)
R8
1.2k
5%
R10 2k 5%
R9 2k 5%
V(I/O)
W
1
2
6
5
7
12V
V
ON
FAULT
PWRGD
EEIN
3V
3
IN
Figure 7. Typical CompactPCI Application
1
IN
9
0.005Ω
DATA LINE EXAMPLE
1%
R1
3V
2
SENSE
DATA BUS
U
4
10
GND
IRF7413
8
GATE
Q2
11
R3
10Ω
5%
3V
LTC1643AL
OUT
3
5V
3
LTC1643AL-1
The LTC1643AL-1 is designed for CompactPCI designs
where the ±12V supplies are not being used on the board
or the supplies are not well regulated. The power good
comparators on the 12V
The V
still operate normally if a – 12V
However, 12V is still required at the 12V
to function. Refer to Figure 10 for a typical LTC1643AL-1
application circuit.
1
IN
13
0.007Ω
1%
R2
LOCAL_PCI_RESET#
5V
EEIN
2
10Ω, 5%
SENSE
TIMER
4
R14
12
IRF7413
4
Q1
pin can be connected to GND and the part will
LTC1643AL-1/LTC1643AH
C2
0.1µF
R4
10Ω
5%
5V
OUT
12V
V
14
EEOUT
OUT
100Ω
5%
R5
16
15
PRECHARGE OUT
1V ±20%
I
OUT
R13
10k
5%
OUT
= ±40mA
5V
5A
3.3V
7.6A
I/O
C1
0.047µF
12V
500mA
–12V
100mA
C3
0.01µF
and V
RESET#
LONG
3.3V
3.3V
BRIDGE
(21154)
OUT
1N4148
PCI
R11
24Ω
5%
D1
EEOUT
LONG
5V
5V
output is not needed.
LTC1643AL
R6
130Ω
1%
R7
56.2Ω
1%
pins are disabled.
IN
1643A F07
pin for the part
C4
1µF
OUT
LT1117
ADJ
13
IN
1643afb
LONG
3.3V