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LTC1644IGN Datasheet

  • LTC1644IGN

  • CompactPCI Bus Hot Swap Controller

  • 24頁(yè)

  • LINER

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FEATURES
s
s
s
LTC1644
CompactPCI Bus
Hot Swap Controller
DESCRIPTIO
The LTC
廬
1644 is a Hot Swap
TM
controller that allows a board
to be safely inserted and removed from a CompactPCI bus
slot. External N-channel transistors control the 3.3V/5V
supplies, while on-chip switches control the
鈥?2V and 12V supplies. The 3.3V and 5V supplies can be
ramped up at a programmable rate. Electronic circuit break-
ers protect all four supplies against overcurrent faults. The
PWRGD output indicates when all of the supply voltages are
within tolerance. The OFF/ON pin is used to cycle the board
power or reset the circuit breaker. The PRECHARGE output
can be used to bias the bus I/O pins during card insertion
and extraction. PCI_RST# is combined on-chip with
HEALTHY# in order to generate LOCAL_PCI_RST#.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group.
s
s
s
s
Allows Safe Board Insertion and Removal from a
Live, CompactPCI
TM
Bus
Controls 鈥?2V, 3.3V, 5V and 12V Supplies
Adjustable Foldback Current Limit with Circuit
Breaker
Dual-Level Circuit Breakers Protect 5V and 3.3V
Supplies from Overcurrent and Short-Circuit Faults
LOCAL_PCI_RST# Logic On-Chip
PRECHARGE Output Biases I/O Pins During Card
Insertion and Extraction
Adjustable Supply Voltage Power-Up Rate
APPLICATIO S
s
Hot Board Insertion into CompactPCI Bus
TYPICAL APPLICATIO
BACKPLANE
CONNECTOR
5V
LONG 5V
3.3V
PCB EDGE
BACKPLANE
CONNECTOR
C8
0.1碌F
PER 10
POWER
PINS
C9
0.1碌F
PER 10
POWER
PINS
R22 2.74鈩?/div>
3V
IN
*
R21 1.74鈩?/div>
Z3
5V
IN
*
R1
0.005鈩?/div>
Q1
IRF7413
R2
0.007鈩?/div>
LONG 3.3V
C6
0.01碌F
C7
0.01碌F
Z4
R3
10鈩?/div>
17
3V
IN
16
15
18
3V
OUT
13
5V
IN
3V
SENSE
GATE
5V
SENSE
Z1
12V
鈥?2V
Z2
1
2
5V
IN
R20 1.2k
R19
1k
5
6
R18
2k
7
9
12V
IN
V
EEIN
OFF/ON
FAULT
PWRGD
RESETIN
GND
PRECHARGE
12
R10
18鈩?5%
R11
51k
C3 4.7nF
R12
51k
R9
24鈩?/div>
1V
鹵10%
Q3
MMBT2222A
DRIVE
11
LTC1644
20-PIN SSOP
BD_SEL#
EARLY V(I/O)
R17
2k
HEALTHY#
PCI_RST#
R15
1鈩?/div>
C4
0.01碌F
GROUND
I/O DATA LINE 1
R16
1鈩?/div>
C5
0.01碌F
TIMER
4
C2
0.1碌F
R6
2k
3V
OUT
RESETOUT
10
8
R8 1k
3V
IN
R7
12鈩?/div>
I/O #1
I/O #128
1644 F01
R13 10鈩?/div>
RESET#
PCI
BRIDGE
CHIP
I/O PIN 1
I/O PIN 128
I/O DATA LINE 128
Z1, Z2: SMAJ12CA
R14 10鈩?/div>
*5V
IN
AND 3V
IN
MAY BE USED AS SOURCES OF EARLY POWER
Z3, Z4: 1PMT5.0AT3
Figure 1
1644f
+
U
U
U
Q2
IRF7413
+
C
LOAD(5VOUT)
5V
OUT
5V AT 5.7A
3V
OUT
3.3V AT 8A
+
R4
10鈩?/div>
14
3
5V
OUT
12V
OUT
20
R5
1k
C
LOAD(3VOUT)
C1
0.047碌F
+
C
LOAD(12VOUT)
19
C
LOAD(VEEOUT)
12V
OUT
12V AT 500mA
V
EEOUT
V
EEOUT
鈥?2V AT 100mA
鈥?鈥?鈥?/div>
鈥?鈥?鈥?/div>
鈥?鈥?鈥?/div>
1

LTC1644IGN 產(chǎn)品屬性

  • LTC1644

  • 55

  • 集成電路 (IC)

  • PMIC - 熱交換

  • -

  • 熱交換控制器

  • CompactPCI?

  • 無(wú)

  • -

  • 3.3V，5V，±12V

  • -40°C ~ 85°C

  • 表面貼裝

  • 20-SSOP（0.154"，3.90mm 寬）

  • 20-SSOP

  • 管件

LTC1644IGN相關(guān)型號(hào)PDF文件下載

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    Switched Capacitor Voltage Converter
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    Programmable Micropower Hex Translator/ Receiver/Driver
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    Programmable Micropower Hex Translator/ Receiver/Driver
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    “Inductorless” 5V to + 5V Converter
    LINER
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    “Inductorless” 5V to + 5V Converter
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    Dual Micropower Chopper Stabilized Operational Amplifier wit...
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