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LTC1642AIGN#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC1642A
1642af
Hot Swap Controller
■
Adjustable Undervoltage and Overvoltage
Protection
■
Foldback Current Limit
■
Adjustable Current Limit Time-Out
■
V
CC
: 2.97V to 16.5V Normal Operation, Protected
Against Surges to 33V
■
Single Channel NFET Driver
■
Latch Off or Automatic Retry on Current Fault
■
Driver for SCR Crowbar on Overvoltage
■
Adjustable Reset Timer
■
Reference Output with Uncommitted Comparator
■
16-Pin SSOP Package
■
Hot Board Insertion
■
Electronic Circuit Breaker
■
InfiniBand
TM
Systems
1N4705
18V
12V
BACKPLANE
(SHORT PIN)
PLUG-IN CARD
V
CC
SENSE GATE
GND BRK TMR
LTC1642A
RST TMR
ON
FAULT
OV
RESET
FB
CRWBR
COMP
+
COMP
–
0.33µF 0.33µF
2N2222
MCR
12DC
REF
0.1µF
2.87k
1%
110k
1%
100Ω
5%
107k
1%
13k
1%
FDS6630A
0.01µF
0.047µF
C
LOAD
12V
AT 2.5A
330Ω
5%
0.010Ω
5%
11.3k
1%
POWER-GOOD = 11.4V
1642a TA01
+
COMPOUT
GND
UV = 10.8V
OV = 13.2V
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
The LTC
®
1642A is a 16-pin Hot Swap
TM
controller that
allows a board to be safely inserted and removed from a
live backplane. Using an external N-Channel pass transis-
tor, the board supply voltage can be ramped up at an
adjustable rate. A high side switch driver controls the
N-Channel gate for supply voltages ranging from 2.97V
to 16.5V.
The SENSE pin allows foldback limiting of the load current,
with circuit breaker action after an adjustable delay time.
The delay allows the part to power-up in current limit. The
CRWBR output can be used to trigger an SCR for crowbar
protection of the load if the input supply exceeds an
adjustable threshold. The RESET output can generate a
system reset with adjustable delay when the supply volt-
age falls below an adjustable threshold. The ON pin cycles
the board power. The LTC1642A is available in the 16-pin
SSOP package.
DESCRIPTIO
U
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Hot Swap is a trademark of Linear
Technology Corporation.
2
LTC1642A
1642af
Supply Voltage (V
CC
) .................................–0.3V to 33V
SENSE Pin ................................... –0.3V to (V
CC
+ 0.3V)
ON, FB, OV, COMP
+
, COMP
–
RESET, FAULT, COMPOUT .....................–0.3V to 18.5V
Operating Temperature Range
LTC1642AC ............................................. 0°C to 70°C
LTC1642AI ......................................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ORDER PART
NUMBER
LTC1642ACGN
LTC1642AIGN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
T
JMAX
= 150°C, θ
JA
= 130°C/W
DC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Operating Voltage Range ● 2.97 16.5 V
I
CC
V
CC
Supply Current ON = V
CC
● 1.25 3.0 mA
V
LKHI
V
CC
Undervoltage Lockout V
CC
Rising ● 2.55 2.73 2.95 V
V
LKLO
V
CC
Undervoltage Lockout V
CC
Falling ● 2.35 2.50 2.95 V
V
LKHYST
V
CC
Undervoltage Lockout Hysteresis 230 mV
V
FB
FB Pin Voltage Threshold FB Falling ● 1.208 1.220 1.232 V
∆V
FB
FB Pin Threshold Supply Variation FB Falling,
2.97V ≤ V
CC
≤ 16.5V ● 515 mV
V
FBHST
FB Pin Voltage Threshold Hysteresis 3 mV
I
FB(IN)
FB Pin Input Current V
OV
= 5V ● 0 ±1 µA
V
OV
OV Pin Voltage Threshold OV Rising ● 1.208 1.220 1.232 V
∆V
OV
OV Pin Threshold Supply Variation OV Rising,
2.97V ≤ V
CC
≤ 16.5V ● 515 mV
V
OVHYST
OV Pin Voltage Theshold Hysteresis 3 mV
I
OV(IN)
OV Pin Input Current V
FB
= 5V ● 0 ±1 µA
V
RST
RST TMR Pin Voltage Threshold RST TMR Rising ● 1.200 1.220 1.250 V
∆V
RST
RST TMR Pin Threshold Supply Variation RST TMR Rising, 2.97V ≤ V
CC
≤ 16.5V ● 515 mV
I
RST
RST TMR Pin Current Timer On ● –1.5 –2.0 –2.5 µA
Timer Off, V
RSTTMR
= 1.5V 10 mA
V
BRK
BRK TMR Pin Voltage Threshold BRK TMR Rising ● 1.200 1.220 1.250 V
∆V
BRK
BRK TMR Pin Threshold Supply Variation BRK TMR Rising, 2.97V ≤ V
CC
≤ 16.5V ● 515 mV
I
BRK
BRK TMR Pin Current Timer On ● –15 –20 –30 µA
Timer Off, V
BRKTMR
= 1.5V 10 mA
V
CR
CRWBR Pin Voltage Theshold CRWBR Rising ● 375 410 425 mV
∆V
CR
CRWBR Pin Threshold Supply Variation 2.97V ≤ V
CC
≤ 16.5V ● 415 mV
I
CR
CRWBR Pin Current CRWBR On, V
CRWBR
= 0V ● –30 –45 –60 µA
CRWBR On, V
CRWBR
= 2.1V ● –1000 –1500 µA
CRWBR Off, V
CRWBR
= 1.5V 2.3 mA
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
CC
= 5V unless otherwise specified.
GN PART
MARKING
1642A
1642AI
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
CRWBR
BRK TMR
RST TMR
ON
RESET
FAULT
FB
GND
V
CC
SENSE
GATE
REF
COMP
–
COMP
+
COMPOUT
OV
GN PACKAGE
16-LEAD PLASTIC SSOP
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
3
LTC1642A
1642af
V
CB
Circuit Breaker Trip Voltage V
CB
= (V
CC
– V
SENSE
), V
FB
= GND ● 15 25 36 mV
V
CB
= (V
CC
– V
SENSE
), V
FB
= 1V ● 45 52.5 60 mV
2.97V ≤ V
CC
≤ 16.5V,
V
CB
= (V
CC
– V
SENSE
), V
FB
= GND ● 12 25 39 mV
V
CB
= (V
CC
– V
SENSE
), V
FB
= 1V ● 42 52.5 63 mV
I
SENSE
SENSE Pin Input Bias Current V
CC
= V
SENSE
= 16.5V ● 0.5 µA
I
GATE
GATE Pin Output Current Charge Pump On, V
GATE
= GND ● –20 –25 –30 µA
Charge Pump Off, V
GATE
= 5V 10 mA
∆V
GATE
External N-Channel Gate Drive V
GATE
– V
CC,
V
CC
= 2.97V ● 4.5 5.9 8.0 V
V
GATE
– V
CC,
V
CC
= 5V ● 10 11.5 14 V
V
GATE
– V
CC,
V
CC
= 15V (0°C to 70°C) ● 6.5 8.5 18 V
V
GATE
– V
CC,
V
CC
= 15V (–40°C to 85°C) ● 6 8.5 18 V
V
ONHI
ON Pin Threshold ON Rising 1.30 1.34 1.38 V
V
ONLO
ON Pin Threshold ON Falling ● 1.20 1.22 1.26 V
V
ONHYST
ON Pin Hysteresis 110 mV
I
ON(IN)
ON Pin Input Current V
ON
= 5V ● 0 ±1 µA
V
OL
Output Low Voltage RESET, FAULT, COMPOUT I
OL
= 1.54mA ● 0.4 V
RESET, FAULT I
O
= 5mA 2 V
I
PU
Logic Output Pull-Up Current RESET, FAULT = GND – 15 µA
V
REF
Reference Output Voltage No Load ● 1.208 1.220 1.232 V
∆V
LNR
Reference Supply Variation 2.97V ≤ V
CC
≤ 16.5V, No Load ● 515 mV
∆V
LDR
Reference Load Regulation I
O
= 0mA to –1mA, Sourcing Only ● 2.5 7.5 mV
I
RSC
Reference Short-Circuit Current V
REF
= 0V 4.5 mA
V
COS
Comparator Offset Voltage V
CM
= V
REF
● ±10 mV
V
CHYST
Comparator Hysteresis V
CM
= V
REF
3mV
DC ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
CC
= 5V unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125
∆V
GATE
(V)
1642a G03
16
14
12
10
8
6
4
2
0
V
CC
= 12V
V
CC
= 5V
V
CC
= 15V
V
CC
= 3V
∆V
GATE
vs Temperature
TEMPERATURE (°C)
–50 –25 0 25 50 75 100 125
I
GATE
(µA)
1642a G04
30
29
28
27
26
25
24
23
22
21
20
V
GATE
= 0V
V
CC
= 3V
V
CC
= 5V
V
CC
= 12V
V
CC
= 15V
I
GATE
vs Temperature
V
CC
(V)
3
6 9 12 15
∆V
GATE
(V)
1642a G26
15
12
9
6
3
0
T
A
= 25°C
∆V
GATE
vs V
CC
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC1642AIGN#TRPBF

Mfr. #:
Buy LTC1642AIGN#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Fault-Protected Hot Swap Controller
Lifecycle:
New from this manufacturer.
Delivery:
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