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LTC4355HMS#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC4355
1
4355ff
For more information www.linear.com/LTC4355
Features
applications
Description
Positive High Voltage
Ideal Diode-OR with Input Supply
and Fuse Monitors
The LTC
®
4355 is a positive voltage ideal diode-OR control-
ler that drives two external N-channel MOSFETs. Forming
the dio
de-OR with N-channel MOSFETs instead of Schottky
diodes reduces power consumption, heat dissipation and
PC board area.
With the LTC4355, power sources can easily be ORed
together to increase total system reliability. The LTC4355
c
an diode
-OR two positive supplies or the return paths of
two negative supplies, such as in a –48V system.
In the forward direction the LTC4355 controls the volt
-
age drop across the MOSFET to ensure smooth current
transfe
r from one path to the other without oscillation. If
a power source fails or is shorted, fast turnoff minimizes
reverse current transients.
Power fault detection indicates if the input supplies are
not in regulation, the inline fuses are blown, or the volt-
ages across the MOSFETs are greater than the fault
th
reshold.
+48V Diode-OR
n
Replaces Power Schottky Diodes
n
Controls N-Channel MOSFETs
n
0.3µs Turn-Off Time Limits Peak Fault Current
n
Wide Operating Voltage Range: 9V to 80V
n
Smooth Switchover without Oscillation
n
No Reverse DC Current
n
Monitors V
IN
, Fuse, and MOSFET Diode
n
Available in 14-Lead (4mm × 3mm) DFN,
16-Lead MS and SO Packages
n
High Availability Systems
n
AdvancedTCA
®
(ATCA) Systems
n
+48V and –48V Distributed Power Systems
n
Telecom Infrastructure
Power Dissipation vs Load Current
typical application
L, LT, LTC, LTM, 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.
4355 TA01
LTC4355
GND
GATE1 GATE2IN1 OUTIN2
MON1
MON2
SET
12.7k
340k
12.7k
340k
7A
22k 22k 22k
22k 22k
GREEN LEDs
PANASONIC LN1351C
7A
GND
FDB3632
FDB3632
TO
LOAD
V
IN1
= +48V
V
IN2
= +48V
VDSFLT
FUSEFLT1
FUSEFLT2
PWRFLT1
PWRFLT2
CURRENT (A)
0
0
POWER DISSIPATION (W)
1
2
3
4
5
6
2 4 6 8
4355 TA02
10
DIODE (MBR10100)
FET (FDB3632)
POWER
SAVED
LTC4355
2
4355ff
For more information www.linear.com/LTC4355
absolute MaxiMuM ratings
Supply Voltages
IN1, IN2 .................................................. –1V to 100V
OUT ..................................................... –0.3V to 100V
Input Voltages
MON1, MON2, SET .................................. –0.3V to 7V
Output Voltages
GATE1 (Note 3) ................... V
IN1
– 0.2V to V
IN1
+ 13V
GATE2 (Note 3)
................... V
IN2
– 0.2V to V
IN2
+ 13V
PWRFLT1, PWRFLT2, VDSFLT,
FUSEFLT1, FUSEFLT2 ............................... –0.3V to 8V
(Notes 1, 2)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
15
MON1
PWRFLT1
FUSEFLT1
FUSEFLT2
PWRFLT2
MON2
SET
IN1
GATE1
OUT
GATE2
IN2
VDSFLT
GND
TOP VIEW
DE14 PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 15) PCB GND CONNECTION OPTIONAL
1
2
3
4
5
6
7
8
IN1
GATE1
NC
OUT
NC
GATE2
IN2
VDSFLT
16
15
14
13
12
11
10
9
MON1
PWRFLT1
FUSEFLT1
FUSEFLT2
PWRFLT2
MON2
SET
GND
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 120°C/W
MON1
PWRFLT1
FUSEFLT1
FUSEFLT2
PWRFLT2
MON2
SET
GND
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN1
GATE1
NC
OUT
NC
GATE2
IN2
NC
T
JMAX
= 125°C, θ
JA
= 80°C/W
Operating Ambient Temperature Range
LTC4355C ................................................ 0°C to 70°C
LTC4355I..............................................–40°C to 85°C
LTC4355H ..........................................–40°C to 125°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS, SO Packages ............................................. 300°C
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4355CDE#PBF LTC4355CDE#TRPBF 4355
14-Lead (4mm × 3mm) Plastic DFN
0°C to 70°C
LTC4355IDE#PBF LTC4355IDE#TRPBF 4355
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 85°C
LTC4355CS#PBF LTC4355CS#TRPBF LTC4355CS 16-Lead Plastic SO 0°C to 70°C
LTC4355IS#PBF LTC4355IS#TRPBF LTC4355IS 16-Lead Plastic SO –40°C to 85°C
LTC4355CMS#PBF LTC4355CMS#TRPBF 4355 16-Lead Plastic MSOP 0°C to 70°C
LTC4355IMS#PBF LTC4355IMS#TRPBF 4355 16-Lead Plastic MSOP –40°C to 85°C
LTC4355HMS#PBF LTC4355HMS#TRPBF 4355 16-Lead Plastic MSOP –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
pin conFiguration
orDer inForMation
LTC4355
3
4355ff
For more information www.linear.com/LTC4355
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OUT
Operating Supply Range
l
9 80 V
I
OUT
Supply Current
l
2 3 mA
I
INx
INx Pin Input Current GATE High
l
0.5 0.6 1.2 mA
DV
GATEx
External N-Channel Gate Drive
(V
GATEx
– V
INx
)
V
OUT
= 20V to 80V
V
OUT
= 9V to 20V
l
l
10
4.5
14
6
18
18
V
V
I
GATEx(UP)
External N-Channel Gate Pull-Up Current V
GATEx
= V
INx
,
V
INx
– V
OUT
= 100mV
l
–14 –20 –26 µA
I
GATEx(DN)
External N-Channel Gate Pull-Down in Fault
Condition
Gate Drive Off, V
GATEx
= V
INx
+5V
l
1 2 A
t
OFF
Gate Turn-Off Time V
INx
– V
OUT
= 55mV
–
|
–
–1V, C
GATE
= 0
V
GATEx
– V
INx
< 1V
l
0.3 0.4 µs
V
MONx(TH)
MONx Pin Threshold Voltage V
MONx
Rising
l
1.209 1.227 1.245 V
V
MONx(HYST)
MONx Pin Hysteresis Voltage
l
10 30 45 mV
I
MONx(IN)
MONx Pin Input Current V
MONx
= 1.23V
l
0 ±1 µA
V
INx(TH)
INx Pin Threshold Voltage V
INx
Rising
l
3 3.5 4 V
V
INx(HYST)
INx Pin Hysteresis Voltage
l
25 75 150 mV
DV
SD
Source-Drain Regulation Voltage
(V
INx
– V
OUT )
V
GATEx
– V
INx
= 2.5V
l
10 25 55 mV
DV
SD(FLT)
Short-Circuit Fault Voltage
(V
INx
– V
OUT
) Rising
SET = 0V
SET = 100kΩ
SET = Hi-Z
l
l
l
0.2
0.4
1.3
0.25
0.5
1.5
0.3
0.6
1.6
V
V
V
DV
SD(FLT)(HYST)
Short-Circuit Fault Hysteresis Voltage 30 mV
V
F LT
PWRFLTx, FUSEFLTx, VDSFLT Pins
Output Low
I
PWRFLTx
, I
FUSEFLTx
, I
VDSFLT
= 5mA
l
100 200 mV
I
F LT
PWRFLTx, FUSEFLTx, VDSFLT Pins
Leakage Current
V
PWRFLTx
, V
FUSEFLTx
, V
VDSFLT
= 5V
l
0 ±1 µA
R
SET(L)
SET Resistance Range for DV
SD(FLT)
= 0.25V
l
0 5
kW
R
SET(M)
SET Resistance Range for DV
SD(FLT)
= 0.5V
l
50 150
kW
R
SET(H)
SET Resistance Range for DV
SD(FLT)
= 1.5V
l
1
MW
electrical characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. 9V < V
OUT
< 80V, unless otherwise noted.
Note 2: All currents into pins are positive, all voltages are referenced to
GND unless otherwise specified.
Note 3: The GATEx pins are internally limited to a minimum of 13V above
INx. Driving these pins beyond the clamp may damage the part.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC4355HMS#TRPBF

Mfr. #:
Buy LTC4355HMS#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Power Management Specialized - PMIC Pos Hi V Ideal Diode-OR w/ In S & Fuse M
Lifecycle:
New from this manufacturer.
Delivery:
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