LTC1643AL-1IGN#TR Linear Technology, LTC1643AL-1IGN#TR Datasheet - Page 8

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

Specifications of LTC1643AL-1IGN#TR

• 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)
• Family Name: LTC1643AL-1
• Package Type: SSOP N
• Operating Supply Voltage (min): 2.75/10.8/-10.8V
• Operating Supply Voltage (max): 12/13.2/-13.2V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 3.99mm
• Product Height (mm): 1.5mm
• Mounting: Surface Mount
• Pin Count: 16
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

BLOCK
LTC1643AL
LTC1643AL-1/LTC1643AH
PIN
V
connected between V
exceed –10.8V before the PWRGD signal can go high on
the LTC1643AH and LTC1643AL.
APPLICATIONS
Hot Circuit Insertion
When a circuit board is inserted into a live PCI slot, the
supply bypass capacitors on the board can draw huge
transient currents from the PCI power bus as they charge
up. The transient currents can cause permanent damage
to the connector pins and cause glitches on the power bus,
causing other boards in the system to reset.
The LTC1643A is designed to turn a board’s supply
voltages on and off in a controlled manner, allowing the
8
EEOUT
PWRGD
ON/ON
FAULT
U
FUNCTIONS
(Pin 15): –12V Supply Output. A 1.2Ω switch is
5
6
7
U
DIAGRAM
Q4
Q3
9.5V
UVL
U
U
EEIN
12V
5V
2.5V
UVL
13
1
INFORMATION
IN
IN
W
U
5V
Q1
and V
SENSE
12
+ –
12V
16
OUT
+
–
LTC1643AH/LTC1643AL
EEOUT
W
5V
OUT
Q9
REF
ONLY
. V
+
–
C
P7
EEOUT
GATE
U
11
Q5
TIMER
12V
must
4
IN
Q6
22µA
LOGIC
12V
IN
V
62µA
200µA
EEIN
2
12V
connected between 12V
exceed 11.4V before the PWRGD signal can go high on the
LTC1643AH and LTC1643AL.
board to be safely inserted or removed from a live PCI slot
without glitching the system power supplies. The chip
also protects the PCI supplies from shorts and monitors
the supply voltages.
The LTC1643AH is designed for motherboard applica-
tions, while the LTC1643AL/LTC1643AL-1 are designed
for CompactPCI applications where the chip resides on
the plug-in board.
Q2
3V
OUT
OUT
V
EEOUT
15
Q10
(Pin 16): 12V Supply Output. A 0.5Ω switch is
+
–
3V
SENSE
10
+ –
REF
2.5V
UVL
LTC1643AH/LTC1643AL
3V
9
IN
ONLY
+
–
C
P5
IN
and 12V
C
C
8
P3
P4
GND
+
–
+
–
Q8
REF
REF
OUT
3V
OUT
3
. 12V
5V
14
OUT
OUT
1643A BD
Q7
must
1643afb