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LTC1644 데이터시트 PDF




Linear에서 제조한 전자 부품 LTC1644은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 LTC1644 자료 제공

부품번호 LTC1644 기능
기능 CompactPCI Bus Hot Swap Controller
제조업체 Linear
로고 Linear 로고


LTC1644 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




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LTC1644 데이터시트, 핀배열, 회로
FEATURES
s Allows Safe Board Insertion and Removal from a
Live, CompactPCITM Bus
s Controls –12V, 3.3V, 5V and 12V Supplies
s Adjustable Foldback Current Limit with Circuit
Breaker
s Dual-Level Circuit Breakers Protect 5V and 3.3V
Supplies from Overcurrent and Short-Circuit Faults
s LOCAL_PCI_RST# Logic On-Chip
s PRECHARGE Output Biases I/O Pins During Card
Insertion and Extraction
s Adjustable Supply Voltage Power-Up Rate
U
APPLICATIO S
s Hot Board Insertion into CompactPCI Bus
LTC1644
CompactPCI Bus
Hot Swap Controller
DESCRIPTIO
The LTC®1644 is a Hot SwapTM 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
–12V 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.
TYPICAL APPLICATIO
5V
LONG 5V
3.3V
LONG 3.3V
12V
–12V
BD_SEL#
HEALTHY#
PCI_RST#
GROUND
I/O PIN 1
I/O PIN 128
PCB EDGE
BACKPLANE BACKPLANE
CONNECTOR CONNECTOR
C8
0.1µF
PER 10
POWER
PINS
C9
0.1µF
PER 10
POWER
PINS
R22 2.74
C6
0.01µF
R21 1.74
C7
0.01µF
3VIN*
Z3
5VIN*
R1
0.005
Q1
IRF7413
Z4
17
R3
10
16 15 18
R2
0.007
Q2
IRF7413
+
CLOAD(5VOUT)
+
C1 CLOAD(3VOUT)
R4
10
R5 0.047µF
1k
13 14
3
5VOUT
5V AT 5.7A
3VOUT
3.3V AT 8A
Z1 Z2
5VIN
EARLY V(I/O)
R17
2k
R20 1.2k
3VIN
1
12VIN
2
VEEIN
R19
1k 5
OFF/ON
6
FAULT
R18
2k 7
PWRGD
9
RESETIN
3VSENSE GATE 3VOUT 5VIN
LTC1644
20-PIN SSOP
5VSENSE
5VOUT
20
12VOUT
+
CLOAD(12VOUT)
19
VEEOUT
CLOAD(VEEOUT)
12VOUT
12V AT 500mA
VEEOUT
–12V AT 100mA
4
TIMER
10
RESETOUT
C2
0.1µF
R6
2k
3VOUT
R15
1
C4
0.01µF
R16
1
C5
0.01µF
I/O DATA LINE 1
R13 10
GND PRECHARGE
8 12
R10
185%
R11
51k
C3 4.7nF
DRIVE
11
R9
24
R8 1k
R12
51k
1V
±10%
Q3 R7
MMBT2222A 12
I/O DATA LINE 128
R14 10
Z1, Z2: SMAJ12CA Z3, Z4: 1PMT5.0AT3 *5VIN AND 3VIN MAY BE USED AS SOURCES OF EARLY POWER
3VIN
RESET#
I/O #1
I/O #128
1644 F01
PCI
BRIDGE
CHIP
Figure 1
1644f
1




LTC1644 pdf, 반도체, 판매, 대치품
LTC1644
TYPICAL PERFOR A CE CHARACTERISTICS
3.3V and 5V Current Foldback
Profile
11
10
9
8 3VOUT
5VOUT
7
6
5
4
3
2
1
TA = 25°C
RSENSE = 0.005
0
012345
OUTPUT VOLTAGE (V)
1644 G01
12VIN Supply Current
vs Temperature
3.2
3.1
3.0
2.9
2.8
–50 –25
0 25 50
TEMPERATURE (°C)
75 100
1644 G04
3VIN UVLO Threshold Voltage
vs Temperature
2.56
2.55 RAMPING
UP
2.54
2.53
2.52
2.51
2.50
2.49 RAMPING
DOWN
2.48
2.47
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1644 G07
4
12V Output Current
1.0
TA = 25°C
0.9 12VIN = 12V
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
02468
OUTPUT VOLTAGE (V)
10 12
1644 G02
12VIN Undervoltage Lockout
vs Temperature
8.50
8.45 RAMPING
UP
8.40
8.35
RAMPING
DOWN
8.30
8.25
8.20
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
1644 G05
5V Foldback Current Limit Voltage
vs Temperature
60
TIMER = 0V
50
5VOUT = 3V
40
30
20
5VOUT = 0V
10
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1644 G08
– 12V Output Current
0.40
TA = 25°C
0.35 VEEIN = –12V
0.30
0.25
0.20
0.15
0.10
0.05
0
0 –2 –4 –6 –8 –10 –12
OUTPUT VOLTAGE (V)
1644 G03
5VIN UVLO Threshold Voltage
vs Temperature
2.55
2.54
2.53
RAMPING
UP
2.52
2.51
2.50
2.49 RAMPING
DOWN
2.48
2.47
2.46
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
1644 G06
3V Foldback Current Limit Voltage
vs Temperature
60
TIMER = 0V
50
3VOUT = 2V
40
30
20
3VOUT = 0V
10
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1644 G09
1644f

4페이지










LTC1644 전자부품, 판매, 대치품
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1644
3VSENSE Input Current
vs Temperature
60
50 3VOUT = 0V
40
30
20
10
0
–50 –25
3VOUT = 2V
0 25 50
75
TEMPERATURE (°C)
100
1644 G28
5VOUT Input Current
vs Temperature
104
103
102
101
100
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
1644 G31
TIMER Pin Current
vs Temperature (OFF/ON = 4V)
70
VTIMER = 5V
60 OFF/ON = 4V
50
40
30
20
10
0
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1644 G34
5VIN Input Current vs Temperature
1.04
TIMER = 0V
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
–50
–25 0 25 50
TEMPERATURE (°C)
75
100
1644 G29
3VOUT Input Current
vs Temperature
164
163
162
161
160
159
158
157
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
1644 G32
TIMER Threshold Voltage
vs Temperature
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
–50
–25 0 25 50
TEMPERATURE (°C)
75
100
1644 G35
3VIN Input Current vs Temperature
550
500 TIMER PIN FLOATING
450
400 TIMER = 0V
350
300
–50 –25 0
25 50
TEMPERATURE (°C)
75 100
1644 G30
TIMER Pin Current
vs Temperature (ON = 0V)
21.6
VTIMER = 0V
ON = 0V
21.4
21.2
21.0
20.8
20.6
20.4
–50 –25
0
25 50
TEMPERATURE (°C)
75 100
1644 G33
5VOUT Discharge Resistance
vs Temperature
70
60
50
40
30
20
10
0
–50 –25
0
25 50 75
TEMPERATURE (°C)
100
1644 G36
1644f
7

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