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Linear Technology Electronic Components Datasheet

LTC1643H Datasheet

PCI-Bus Hot Swap Controller

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LTC1643H pdf
LTC1643L/LTC1643L-1/LTC1643H
PCI-Bus Hot Swap
Controller
FEATURES
s Allows Safe Board Insertion and Removal from a
Live PCI Slot
s Works on either a Motherboard (LTC1643H) or
CompactPCITM Card (LTC1643L/LTC1643L-1)
s Controls –12V, 3.3V, 5V, 12V Supplies
s Programmable Foldback Current Limit with
Circuit Breaker
s User-Programmable Supply Voltage Power-Up Rate
s High Side Drive for External N-Channels
s –12V and 12V On-Chip Switches
s Fault and Power-Good Outputs
U
APPLICATIO S
s PCI-Based Servers
s CompactPCI Compliant Boards
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
CompactPCI is a trademark of PCI Industrial Computer Manufacturing Group.
DESCRIPTIO
The LTC®1643 is a Hot SwapTM controller that allows a board
to be safely inserted and removed from a live PCI-Bus slot.
Two external N-channel transistors control the 3.3V and 5V
supplies while on-chip switches control the –12V and 12V
supplies. All supply voltages can be ramped up at a program-
mable rate. An electronic circuit breaker protects all four
supplies against overcurrent faults. The foldback current limit
feature limits current spikes and power dissipation when
shorts occur and allows boards with large capacitances to be
powered up without tripping the circuit breaker. The PWRGD
output indicates when all of the supply voltages are within
tolerance and the FAULT output indicates an overcurrent
condition. The ON(LTC1643H)/ON (LTC1643L/LTC1643L-1)
pin is used to cycle the board power or reset the circuit
breaker. The LTC1643L-1 has the ±12V power good com-
parators disabled.
The LTC1643 is available in a 16-pin narrow SSOP package.
TYPICAL APPLICATION
Hot Swappable PCI Supply
R1 Q1
0.007IRF7413
R2
0.005
Q2
IRF7413
R6
10
SYSTEM
POWER
SUPPLY
R5
10
9 10 11 3 13 12
PCI
POWER
SYSTEM
CONTROLLER
8
3VIN
GND
1
2
12VIN
VEEIN
3VSENSE GATE 3VOUT 5VIN
5VSENSE
5
ON
R3
LTC1643H
10k 6
FAULT
R4
10k 7 PWRGD
RESET
R7
100
14
5VOUT
16
12VOUT
15
VEEOUT
4
TIMER
5V
5A
3.3V
7.6A
GND
C1
0.047µF
C2
0.1µF
12V
500mA
–12V
100mA
LOGIC
RESET
1643 TA01
1


Linear Technology Electronic Components Datasheet

LTC1643H Datasheet

PCI-Bus Hot Swap Controller

No Preview Available !

LTC1643H pdf
LTC1643L/LTC1643L-1/LTC1643H
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltages
12VIN ................................................................ 13.2V
VEEIN .............................................................. –13.2V
Input Voltage (Pin 5) ................ – 0.3V to (12VIN + 0.3V)
Output Voltages (Pins 6, 7) ...... – 0.3V to (12VIN + 0.3V)
Analog Voltages
(Pins 3, 4, 9, 10 to 14) ........ – 0.3V to (12VIN + 0.3V)
VEEOUT ............................................ –13.2V to + 0.3V
12VOUT .............................................. – 0.3V to 13.2V
Operating Temperature Range
Commercial ............................................. 0°C to 70°C
Industrial ........................................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
12VIN 1
VEEIN 2
3VOUT 3
TIMER 4
ON/ON* 5
FAULT 6
PWRGD 7
GND 8
16 12VOUT
15 VEEOUT
14 5VOUT
13 5VIN
12 5VSENSE
11 GATE
10 3VSENSE
9 3VIN
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
* ON FOR LTC1643H, ON FOR LTC1643L
TJMAX = 150°C, θJA = 135°C/ W
ORDER PART
NUMBER
LTC1643HCGN
LTC1643LCGN
LTC1643L-1CGN
LTC1643HIGN
LTC1643LIGN
Consult factory for Military grade parts.
DC ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
V12VIN = 12V, VEE = – 12V, V3VIN = 3.3V, V5VIN = 5V. (Note 2)
SYMBOL
IDD
VLKO
PARAMETER
V12VIN Supply Current
Undervoltage Lockout
VFB Foldback Current Limit Voltage
tCB Circuit Breaker Trip Filter Time
ICP GATE Pin Output Current
VGATE
VDROP
External Gate Voltage
Internal Switch Voltage Drop
ICL Current Foldback
TTS Thermal Shutdown Temperature
VTH Power-Good Threshold Voltage
CONDITIONS
MIN TYP MAX
ON = 3V, ON = GND
q 3.5 8
12VIN
3VIN
5VIN
VFB = (V5VIN – V5VSENSE), V5VOUT = 0V
VFB = (V5VIN – V5VSENSE), V5VOUT > 4V
VFB = (V3VIN – V3VSENSE), V3VOUT = 0V
VFB = (V3VIN – V3VSENSE), V3VOUT > 2V
q7
9.5 10.8
q 2.25 2.5 2.75
q 2.25 2.5 2.75
q4
7.5 12
q 40 53 65
q4
7.5 12
q 40 53 65
14.6
Charge Pump On, VGATE = GND, FAULT = High q – 20
Charge Pump Off, VGATE = 5V, FAULT = High
Charge Pump Off, VGATE = 2V, FAULT = Low
q3
(V12VIN – VGATE)
(V12VIN – V12VOUT), I12VOUT = 500mA C Grade
I Grade
q
q
– 50 – 100
200
10 20
100 200
250 600
250 750
(VEEOUT – VEEIN), IVEEIN = 100mA
12VIN = 12V, 12VOUT = 0V
12VIN, 12VOUT = 12V
VEEIN = –12V, VEEOUT = 0V
VEEIN, VEEOUT = – 12V
q
q 50
q 525
q 100
q 225
120 250
250 500
850 1500
160 215
450 800
150
V12VOUT
LTC1643H/LTC1643L Only
C Grade q 10.8 11.1 11.4
I Grade
q 10.4 11.1 11.4
VEEOUT
LTC1643H/LTC1643L Only
C Grade
I Grade
q – 10.2 – 10.5 – 10.8
q – 10.0 – 10.5 – 10.8
UNITS
mA
V
V
V
mV
mV
mV
mV
µs
µA
µA
mA
mV
mV
mV
mV
mA
mA
mA
mA
°C
V
V
V
V
2


Part Number LTC1643H
Description PCI-Bus Hot Swap Controller
Maker Linear Technology
Total Page 16 Pages
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