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LTC4260CGN#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
LTC4260
1
4260fc
For more information www.linear.com/LTC4260
Typical applicaTion
FeaTures DescripTion
Positive High Voltage
Hot Swap Controller with
I
2
C Compatible Monitoring
The LT C
®
4260 Hot Swap™ controller allows a board to be
safely inserted and removed from a live backplane. Using
an external N-channel pass transistor, the board supply
voltage can be ramped up at an adjustable rate. An I
2
C
interface and onboard ADC allow monitoring of board
current, voltage and fault status.
The device features adjustable analog foldback current
limit with latch off or automatic restart after the LTC4260
remains in current limit beyond an adjustable time-out
delay.
The controller has additional features to interrupt the host
when a fault has occurred, notify when output power is
good, detect insertion of a load card and power-up in
either the on or off state.
applicaTions
n
Allows Safe Board Insertion into Live Backplane
n
8-Bit ADC Monitors Current and Voltage
n
I
2
C™/SMBus Interface
n
Wide Operating Voltage Range: 8.5V to 80V
n
High Side Drive for External N-Channel MOSFET
n
Input Overvoltage/Undervoltage Protection
n
Optional Latchoff or Autoretry After Faults
n
Alerts Host After Faults
n
Foldback Current Limiting
n
Available in 24-Lead SO, 24-Lead Narrow
SSOP and 32-Lead (5mm × 5mm) QFN Packages
n
Electronic Circuit Breakers
n
Live Board Insertion
n
Computers, Servers
L, LT , LT C , LT M , Burst Mode, Linear Technology and the Linear logo are registered trademarks
and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Power Up Waveforms3A, 48V Card Resident Application
UV
BACKPLANE PLUG-IN
CARD
2.67k
*
1.74k
49.9k
48V
SDA
SCL
ALERT
GND
V
DD
SENSE
LTC4260
INTV
CC
100k
FDB3632
0.010Ω
10Ω
6.8nF
C
L
43.5k
3.57k
V
OUT
48V
24k
68nF
*DIODES INC. SMBT70A
0.1µF
0.1µF
GATE
TIMER GND
FB
BD_PRST
ADIN
GPIO
4260 TA01
SOURCE
OV
SDAO
SDAI
SCL
ALERT
ON
CONNECTOR 1
CONNECTOR 2
+
V
IN
50V/DIV
V
OUT
50V/DIV
GPIO
5V/DIV
25ms/DIV
4260 TA02
I
IN
2A/DIV
C
L
= 1000F
LTC4260
2
4260fc
For more information www.linear.com/LTC4260
pin conFiguraTion
absoluTe MaxiMuM raTings
(Notes 1, 2)
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
GN PACKAGE
24-LEAD PLASTIC SSOP
24
23
22
21
20
19
18
17
16
15
14
13
SENSE
V
DD
NC
UV
OV
GND
ON
SCL
SDAI
SDAO
ALERT
TIMER
GATE
SOURCE
NC
NC
GPIO
INTV
CC
FB
ADR2
ADR1
ADR0
BD_PRST
ADIN
T
JMAX
= 125°C, θ
JA
= 85°C/W
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
SW PACKAGE
24-LEAD PLASTIC SO
24
23
22
21
20
19
18
17
16
15
14
13
SENSE
V
DD
NC
NC
UV
GND
ON
SCL
SDAI
SDAO
ALERT
TIMER
GATE
SOURCE
NC
NC
GPIO
INTV
CC
FB
ADR2
ADR1
ADR0
BD_PRST
ADIN
T
JMAX
= 125°C, θ
JA
= 75°C/W
32 31 30 29 28 27 26 25
9 10 11 12
TOP VIEW
33
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1NC
NC
NC
UV
OV
GND
ON
SCL
NC
NC
NC
NC
GPIO
INTV
CC
FB
ADR2
V
DD
V
DDK
SENSE
NC
NC
NC
GATE
SOURCE
SDAI
SDAO
ALERT
TIMER
ADIN
BD_PRST
ADR0
ADR1
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD (PIN 33) PCB ELECTRICAL CONNECTION OPTIONAL
ALERT, SDAO ............................................ –0.3V to 6.5V
Supply Voltage (INTV
CC
) .......................... –0.3V to 6.2V
Operating Temperature Range
LTC4260C ................................................ 0°C to 70°C
LTC4260I.............................................. –40°C to 85°C
Storage Temperature Range
GN, SW Packages ..............................– 65°C to 150°C
UH Package ....................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
GN, SW Packages Only ..................................... 300°C
Supply Voltages (V
DD
) .............................–0.3V to 100V
Input Voltages
SENSE ..............................V
DD
– 10V or –0.3V to V
DD
SOURCE ............................ GATE – 5V to GATE + 0.3V
BD_PRST, FB, ON, OV, UV ...................... –0.3V to 12V
ADR0-ADR2, TIMER, ADIN ........–0.3V to INTV
CC
+ 0.3V
SCL, SDAI ............................................ –0.3V to 6.5V
Output Voltages
GPIO .................................................... –0.3V to 100V
GATE (Note 3) ..................................... –0.3V to 100V
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4260CGN#PBF LTC4260CGN#TRPBF LTC4260CGN 24-Lead Plastic SSOP 0°C to 70°C
LTC4260IGN#PBF LTC4260IGN#TRPBF LTC4260IGN 24-Lead Plastic SSOP –40°C to 85°C
LTC4260CSW#PBF LTC4260CSW#TRPBF LTC4260CSW 24-Lead Plastic SO 0°C to 70°C
LTC4260ISW#PBF LTC4260ISW#TRPBF LTC4260ISW 24-Lead Plastic SO –40°C to 85°C
LTC4260CUH#PBF LTC4260CUH#TRPBF 4260
32-Lead (5mm × 5mm) Plastic QFN
0°C to 70°C
LTC4260IUH#PBF LTC4260IUH#TRPBF 4260
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 85°C
Consult LT C Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
LTC4260
3
4260fc
For more information www.linear.com/LTC4260
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
General
V
DD
Input Supply Range
l
8.5 80 V
I
DD
Input Supply Current
l
2 5 mA
V
DD(UVL)
V
DD
Supply Undervoltage Lockout V
DD
Falling
l
7 7.45 7.9 V
INTV
CC(UVL)
V
CC
Supply Undervoltage Lockout INTV
CC
Falling
l
3.4 3.8 4.2 V
INTV
CC
Internal Regulator Voltage
l
5 5.5 6 V
Gate Drive
t
D
Turn-On Delay
l
50 100 150 ms
ΔV
GATE
External N-Channel Gate Drive
(V
GATE
– V
SOURCE
)
V
DD
= 20V to 80V
V
DD
= 8.5V to 20V
l
l
10
4.5
14
6
18
18
V
V
I
GATE(UP)
External N-Channel Pull-Up Current Gate Drive On, V
GATE
= 0V
l
–14 –18 –22 µA
I
GATE(FST)
External N-Channel Fast Pull-Down Fast Turn Off, V
GATE
= 48V, V
SOURCE
= 43V
l
300 600 1000 mA
I
GATE(DN)
External N-Channel Pull-Down Current Gate Drive Off, V
GATE
= 58V, V
SOURCE
= 48V
l
0.7 1 1.4 mA
I
SOURCE
SOURCE Pin Input Current SOURCE = 48V
l
200 400 600 µA
Input Pins
V
ON(TH)
ON Pin Threshold Voltage V
ON
Rising
l
1.19 1.235 1.27 V
ΔV
ON(HYST)
ON Pin Hysteresis
l
60 130 200 mV
I
ON(IN)
ON Pin Input Current V
ON
= 1.2V
l
0 ±1 µA
V
OV(TH)
OV Pin Threshold Voltage V
OV
Rising
l
3.43 3.5 3.56 V
ΔV
OV(HYST)
OV Pin Hysteresis
l
70 90 120 mV
I
OV(IN)
OV Pin Input Current V
OV
= 3.5V
l
0 ±1 µA
V
UV(TH)
UV Pin Threshold Voltage V
UV
Rising
l
3.43 3.5 3.56 V
ΔV
UV(HYST)
UV Pin Hysteresis
l
310 380 440 mV
I
UV(IN)
UV Pin Input Current V
UV
= 3.5V
l
0 ±2 µA
V
UV(RTH)
UV Pin Reset Threshold Voltage V
UV
Falling
l
1.18 1.235 1.27 V
ΔV
UV(RHYST)
UV Pin Reset Threshold Hysteresis
l
80 160 250 mV
ΔV
SENSE(TH)
Current Limit Sense Voltage Threshold
(V
DD
– V
SENSE
)
V
FB
= 3.5V
V
FB
= 0V
l
l
45
10
50
20
55
30
mV
mV
I
SENSE(IN)
SENSE Pin Input Current V
SENSE
= 48V
l
70 100 130 µA
V
FB
Foldback Pin Power Good Threshold FB Rising
l
3.43 3.5 3.56 V
ΔV
FB(HYST)
FB Pin Power Good Hysteresis
l
80 100 120 mV
I
FB
Foldback Pin Input Current FB = 3.5V
l
0 ±2 µA
V
BD_PRST(TH)
BD_PRST Input Threshold V
BD_PRST
Rising
l
1.2 1.235 1.27 V
ΔV
BD_PRST(HYST)
BD_PRST Hysteresis
l
70 130 190 mV
I
BD_PRST
BD_PRST Pullup Current BD_PRST = 0V
l
–7 –10 –16 µA
V
GPIO(TH)
GPIO Pin Input Threshold V
GPIO
Rising
l
1.6 1.8 2 V
ΔV
GPIO(HYST)
GPIO Pin Hysteresis 80 mV
V
GPIO(OL)
GPIO Pin Output Low Voltage I
GPIO
= 2mA
l
0.25 0.5 V
I
GPIO(IN)
GPIO Pin Input Leakage Current V
GPIO
= 80V
l
0 ±10 µA
R
ADIN
ADIN Pin Input Resistance V
ADIN
= 1.28V
l
2 10 MΩ
I
ADIN
ADIN Pin Input Current V
ADIN
= 2.56V
l
0 ±1 µA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 48V, unless otherwise noted.
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LTC4260CGN#PBF

Mfr. #:
Buy LTC4260CGN#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers 48V Hot Swap Controller with I2C ADC
Lifecycle:
New from this manufacturer.
Delivery:
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