LTC1644CGN Linear Technology, LTC1644CGN Datasheet - Page 19
![IC CONTROLLER HOT SWAP 20-SSOP](/photos/7/21/72135/20-ssop_05-08-1641_sml.jpg)
LTC1644CGN
Manufacturer Part Number
LTC1644CGN
Description
IC CONTROLLER HOT SWAP 20-SSOP
Manufacturer
Linear Technology
Type
Hot-Swap Controllerr
Datasheet
1.LTC1644CGNPBF.pdf
(24 pages)
Specifications of LTC1644CGN
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)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1644CGN#PBF
Manufacturer:
Linear Technology
Quantity:
135
APPLICATIO S I FOR ATIO
I/O PIN 128
LONG 3.3V
HEALTHY#
PCI_RST#
BD_SEL#
LONG 5V
GROUND
I/O PIN 1
3.3V
12V
5V
CONNECTOR
BACKPLANE
LONG 3.3V
GROUND
3.3V
CONNECTOR
BACKPLANE
U
PCB EDGE
CONNECTOR
BACKPLANE
Z3: 1PMT5.0AT3
*ADDITIONAL PINS OMITTED FOR CLARITY
I/O DATA LINE 1
I/O DATA LINE 128
0.01 F
U
Z1: SMAJ12CA Z3, Z4: 1PMT5.0AT3
*5V
IN
C6
R15
1
CONNECTOR
EARLY V(I/O)
BACKPLANE
AND 3V
PCB EDGE
C4
0.01 F
C8 0.1 F
PER 10
POWER
PINS
R17
2k
IN
Z1
5V
MAY BE USED AS SOURCES OF EARLY POWER
W
IN
R22 2.74
R21 1.74
Figure 11. No V
C7
0.01 F
R21 1.74
R20 1.2k
Figure 12. No 5V Supply Application Circuit
C6
0.01 F
C9 0.1 F
PER 10
POWER
PINS
C8 0.1 F
PER 10
POWER PINS
Z3
3V
U
R19
R18
Z3
1k
2k
3V
IN
10
10
8
R13
R14
*
IN
GND
1
2
5
6
7
9
EE
5V
5V
Z4
12V
V
OFF/ON
FAULT
PWRGD
RESETIN
IN
(–12V) Supply Application Circuit
IN
EEIN
13
*
3V
IN
GND
IN
17
5V
0.005
8
18 5%
SENSE
R1
R10
14
PRECHARGE
3V
SENSE
16
3V
12
R11
51k
IN
IRF7413
17
GATE
0.005
Q1
R1
15
R3
10
LTC1644*
3V
3V
R12
51k
SENSE
C3 4.7nF
LTC1644
OUT
16
18
5V
IRF7413
GATE
IN
10%
1V
13
Q1
0.007
15
24
R3
10
R2
R9
5V
MMBT2222A
3V
SENSE
DRIVE
OUT
Q3
14
18
IRF7413
11
Q2
R8 1k
R4
10
5V
5V
RESETOUT
OUT
3
OUT
12V
V
C
C
3
TIMER
EEOUT
LOAD(5VOUT)
LOAD(3VOUT)
R5
1k
OUT
12
R5
1k
R7
1644 F12
0.047 F
20
C
19
4
10
LTC1644
0.047 F
LOAD(12VOUT)
C1
3V
C1
I/O #128
I/O #128
3V
IN
+
+
V
NC
I/O #1
I/O #1
EEOUT
OUT
C2
0.1 F
R6
2k
5V
3V
RESET#
+
OUT
OUT
BRIDGE
(21154)
19
PCI
3V
OUT
12V
1644 F11
1644f
OUT