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LTC4240CGN#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
LTC4240
1
4240f
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
The LTC
®
4240 is a Hot Swap
TM
controller that allows a board
to be safely inserted and removed from a live CompactPCI
bus slot. The LTC4240 has a built-in 2-wire I
2
C compatible
interface to allow software control and monitoring of
device function and power supply status. Two external
N-channel transistors control the 3.3V and 5V supplies,
while two internal switches control the –12V and 12V
supplies. Electronic circuit breakers 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 I
2
C interface allows the user to turn the
device off or on, set RESETOUT, turn on the status LED
driver and ignore 12V, –12V faults. It also allows the user
to read the status of the FAULT, RESETIN, RESETOUT,
PWRGD, PRSNT1# and PRSNT2# pins. Under a fault
condition, the I
2
C interface can also be used to determine
which of the four supplies generated the fault. The LTC4240
is available in a 28-pin narrow SSOP package.
■
Hot Board Insertion into CompactPCI Bus
■
Electronic Circuit Breaker
■
Allows Safe Board Insertion and Removal from a
Live CompactPCI
TM
Bus
■
I
2
C
TM
Compatible 2-Wire Interface
■
PRECHARGE Output Biases I/O Pins During Card
Insertion and Extraction
■
Controls 3.3V, 5V, 12V and –12V Supplies
■
Foldback Current Limit with Circuit Breaker
■
LOCAL_PCI_RST# Logic On-Board
■
QuickSwitch
®
Enable Output
■
Status LED Driver
■
User Programmable Supply Voltage Power-Up Rate
■
Registers Individual Supply Faults
■
Available in a 28-Pin Narrow SSOP Package
CompactPCI Hot Swap
Controller with I
2
C Compatible Interface
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
QuickSwitch is a registered trademark of Quality Semiconductor Corp.
CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group.
I
2
C is a trademark of Philips Electronics N.V.
C5
0.01µF
C1
0.047µF
C4
0.01µF
GND
12V
IN
V
EEIN
OFF/ON
FAULT
PWRGD
RESETIN
3V
IN
3V
IN
5V
IN
3V
SENSE
3V
OUT
5V
IN
LTC4240
PRECHARGE DRIVE
5V
OUT
5V
SENSE
GATE
12V
OUT
V
EEOUT
TIMER
RESETOUT
EARLY
V(I/O)
R16
10k
R18
1k
R17, 1.2k
R3
10Ω
5V
IN
R4
10Ω
R15
2k
R30
1k
R29
10Ω
5V
OUT
5V AT 5A
3V
OUT
3.3V AT 7.6A
12V
OUT
12V AT 500mA
V
EEOUT
–12V AT 100mA
4240 TA01
R11
18Ω
3V
IN
3V
OUT
R6
10k
R5
1k
R8, 1k
R7, 12Ω
C3, 4.7nF
R9
24Ω
R1
0.005Ω
Q1
Si7880DP
Q2
Si7880DP
R2
0.007Ω
C2
0.1µF
R13
10Ω
R14
10Ω
MEDIUM 5V
LONG 5V
MEDIUM 3.3V
LONG 3.3V
LONG V(I/O)
12V
–12V
BD_SEL#
HEALTHY#
PCI_RST#
GROUND
TO PCI BRIDGE
DEVICE OR
EQUIVALENT
BE
DGND
LED
SCL
SDA
R19
2.55k
1%
R20
1.91k
1%
PRSNT2#
PRSNT1#
ADDRIN
SCL
SDA
C8
0.01µF
PER
PIN
C
LOAD
(5V
OUT
)
C
LOAD
(3V
OUT
)
C
LOAD
(12V
OUT
)
C
LOAD
(V
EEOUT
)
C7
0.01µF
PER
PIN
C6
0.01µF
5V
IN
Z4
Z1
Z2
Z1, Z2: SMAJ12CA
Z3, Z4: IPMT5.0AT3
Z3
CompactPCI
BACKPLANE
CONNECTOR
(FEMALE)
CompactPCI
BACKPLANE
CONNECTOR
(MALE)
LOCAL_PCI_RST#
R10
100Ω
TO
QUICKSWITCH
®
ENABLE
Q3
MMBT2222A
R12
10k
R22, 2.74Ω
R21, 1.74Ω
R25, 1.2k
R28, 200Ω
+
+
+
+
C9
10nF
C10
10nF
C11
10nF
LTC4240
2
4240f
Supply Voltages
5V
IN
....................................................................
–0.3V to 12V
12V
IN
.................................................................
–0.3V to 14V
V
EEIN
...................................................................
0.3V to –14V
Input Voltages
PRSNT1#, PRSNT2#, SCL, RESETIN,
OFF/ON ..................................................–0.3V to 12V
5V
OUT
, 5V
SENSE
, 3V
IN
,
3V
SENSE
, 3V
OUT
............................
–0.3V to (5V
IN
+ 0.3V)
ADDRIN, PRECHARGE ......................... –0.3V to 5V
IN
Output Voltages
TIMER, FAULT, PWRGD, SDA, RESETOUT,
LED, DRIVE, GATE, 12V
OUT
.......................
–0.3V to 14V
V
EEOUT
................................................................
–14V to 0.3V
BE............................................. 0.3V to (5V
IN
+ 0.3V)
Operating Temperature Range
LTC4240C ............................................... 0°C to 70°C
LTC4240I.............................................–40°C to 85°C
Storage Temperature Range .................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
T
JMAX
= 140°C, θ
JA
= 135°C/W
LTC4240CGN
LTC4240IGN
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Notes 1, 2)
ELECTRICAL CHARACTERISTICS
Consult LTC Marketing for parts specified with wider operating temperature ranges.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PRSNT1#
PRSNT2#
12V
IN
V
EEIN
TIMER
5V
OUT
FAULT
PWRGD
BE
GND
ADDRIN
SDA
SCL
RESETOUT
OFF/ON
RESETIN
12V
OUT
V
EEOUT
3V
OUT
3V
SENSE
3V
IN
5V
IN
5V
SENSE
GATE
PRECHARGE
DRIVE
DGND
LED
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
DD
V
12VIN
Supply Current OFF/ON = 0V ● 38 mA
V
LKO
Undervoltage Lockout 12V
IN
● 7.00 8.00 10.80 V
5V
IN
● 4.10 4.3 4.45 V
3V
IN
● 2.35 2.45 2.55 V
V
EEIN
● –9 –10.5 V
V
FB
Foldback Current Limit Voltage V
FB
= (V
5VIN
– V
5VSENSE
), V
5VOUT
= 0V, TIMER = 0V ● 15 25 35 mV
V
FB
= (V
5VIN
– V
5VSENSE
), V
5VOUT
= 3V, TIMER = 0V ● 55 70 85 mV
V
FB
= (V
3VIN
– V
3VSENSE
), V
3VOUT
= 0V, TIMER = 0V ● 15 25 35 mV
V
FB
= (V
3VIN
– V
3VSENSE
), V
3VOUT
= 2V, TIMER = 0V ● 55 65 80 mV
V
CB
Circuit Breaker Trip Voltage V
TV
= (V
5VIN
– V
5VSENSE
), V
5VOUT
= 5V, TIMER = Open ● 50 55 60 mV
V
TV
= (V
5VIN
– V
5VSENSE
), V
5VOUT
= 0V, TIMER = Open ● 61116 mV
V
TV
= (V
3VIN
– V
3VSENSE
), V
3VOUT
= 3.3V, TIMER = Open ● 50 55 60 mV
V
TV
= (V
3VIN
– V
3VSENSE
), V
3VOUT
= 0V, TIMER = Open ● 61116 mV
t
OC
Overcurrent Fault Response Time (V
5VIN
– V
5VSENSE
) = 100mV, TIMER = Open ● 25 35 55 µs
Overcurrent Fault Response Time (V
3VIN
– V
3VSENSE
) = 100mV, TIMER = Open ● 25 35 55 µs
t
SC
Short-Circuit Response Time (V
5VIN
– V
5VSENSE
) = 200mV, TIMER = Open ● 25 35 55 µs
(V
3VIN
– V
3VSENSE
) = 200mV, TIMER = Open ● 25 35 55 µs
I
GATE(UP)
GATE Pin Turn-On Current OFF/ON = 0V, V
GATE
= 0V, TIMER = 0V ● –20 –65 –100 µA
I
GATE(DN)
GATE Pin Turn-Off Current V
GATE
= 5V, (Note 3) ● 100 200 300 µA
I
GATE(FAULT)
GATE Pin Fault-Off Current OFF/ON = 0V, V
GATE
= 2V, TIMER = Open, FAULT = 0V ● 2.5 6 8.5 mA
∆V
GATE
External Gate Voltage ∆V
GATE
= (V
12VIN
– V
GATE
), I
GATE
= 1µA ● 600 1000 mV
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. 12V
IN
= 12V, V
EEIN
= –12V, V
3VIN
= 3.3V, V
5VIN
= 5V unless otherwise noted.
LTC4240
3
4240f
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. 12V
IN
= 12V, V
EEIN
= –12V, V
3VIN
= 3.3V, V
5VIN
= 5V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
5V
IN
– 0.4
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆V
12V
12V Switch Voltage Drop ∆V
12V
= (V
12VIN
– V
12VOUT
), I = 500mA ● 300 600 mV
∆V
VEE
V
EE
Switch Voltage Drop ∆V
VEE
= (V
EEOUT
– V
EEIN
), I = 100mA ● 125 250 mV
I
CL
Current Foldback 12V
IN
= 12V, 12V
OUT
= 0V ● –50 –350 –800 mA
V
EEIN
= –12V, V
EEOUT
= 0V ● 50 250 350 mA
I
TH
Current Fault Threshold 12V
IN
= 12V ● –550 –1250 –1900 mA
V
EEIN
= –12V ● 225 500 800 mA
T
TS
Thermal Shutdown Temperature Note 4 150 °C
V
TH
Power Good Threshold Voltage 12V
OUT
● 10.8 11.1 11.4 V
5V
OUT
● 4.50 4.65 4.75 V
3V
OUT
● 2.8 2.9 3.0 V
V
EEOUT
● –10 – 10.5 – 10.8 V
V
IL
Input Low Voltage OFF/ON, RESETIN, SCL, SDA, PRSNT1#, PRSNT2# ● 0.8 V
V
IH
Input High Voltage OFF/ON, RESETIN, SCL, SDA, PRSNT1#, PRSNT2# ● 2V
I
IN
Input Current PRSNT1#, PRSNT2#, OFF/ON = RESETIN = SDA = SCL = 0V, 5V, ● ±0.08 ±2 µA
OFF/ON, RESETIN, SDA, SCL PRSNT1#, PRSNT2# = 0V, 5V
● ±0.08 ±2 µA
RESETOUT, FAULT Leakage Current RESETOUT = FAULT = 12V, OFF/ON = 0V, RESETIN = 3.3V ● ±0.08 ±2 µA
PWRGD Leakage Current PWRGD = 12V, OFF/ON = 4V ● ±0.08 ±2 µA
5V
SENSE
Input Current 5V
SENSE
= 5V, 5V
OUT
= 0V, GATE = 0V ● 55 100 µA
3V
SENSE
Input Current 3V
SENSE
= 3.3V, 3V
OUT
= 0V, GATE = 0V ● 55 100 µA
5V
IN
Input Current 5V
IN
= 5V, TIMER = 0V, OFF/ON = 0V ● 0.8 1.5 mA
3V
IN
Input Current 3V
IN
= 3.3V, TIMER = Open ● 250 600 µA
3V
IN
= 3.3V, TIMER = 0V ● 250 500 µA
5V
OUT
Input Current 5V
OUT
= 5V, OFF/ON = 0V, TIMER = 0V, GATE = 0V ● 237 400 µA
3V
OUT
Input Current 3V
OUT
= 3.3V, OFF/ON = 0V, TIMER = 0V, GATE = 0V ● 120 200 µA
V
EEIN
Input Current TIMER = 0V, OFF/ON = 0V ● –950 –1200 µA
Precharge Input Current V
PRECHARGE
= 1V ● 10 µA
ADDRIN ADDRIN = 0V, 5V ● ±0.1 µA
I
TIMER
TIMER Pin Current OFF/ON = 0V, TIMER = 0V ● –6 –11.5 –17 µA
TIMER = 5V, OFF/ON = 2V
● 15 28 55 mA
V
TIMER
TIMER Threshold Voltages ● 5 5.5 6.5 V
R
DIS
12V
OUT
Discharge Impedance ● 430 1000 Ω
5V
OUT
Discharge Impedance ● 50 100 Ω
3V
OUT
Discharge Impedance ● 150 300 Ω
V
EEOUT
Discharge Impedance ● 650 1000 Ω
V
OH
CMOS Output High Voltage BE, I = –100µA ● V
V
OL
CMOS Output Low Voltage BE, I = 100µA ● 0.4 V
Output Low Voltage PWRGD, RESETOUT, FAULT, SDA(I = 3mA)
● 0.4 V
Output Low Voltage LED (I = 10mA)
● 0.8 V
V
PXG
PRECHARGE Reference Voltage V
5VIN
= 5V ● 0.9 1 1.1 V
I
2
C Timing (Note 4)
f
SCL
SCL Clock Frequency 100 kHz
t
SUSTA
Start Condition Setup Time 4.7 µs
t
BUF
Bus Free Time Between Stop and Start 4.7 µs
t
HDSTA
Start Condition Hold Time 4 µs
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28

LTC4240CGN#TRPBF

Mfr. #:
Buy LTC4240CGN#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers CompactPCI Hot Swap Cntr w/ I2C Compatib
Lifecycle:
New from this manufacturer.
Delivery:
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