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Linear Technology Electronic Components Datasheet

LTC4357MPMS8 Datasheet

Positive High Voltage Ideal Diode Controller

No Preview Available !

Features
n Reduces Power Dissipation by Replacing a Power
Schottky Diode with an N-Channel MOSFET
n 0.5µs 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 Available in 6-Lead (2mm × 3mm) DFN and
8-Lead MSOP Packages
Applications
n N + 1 Redundant Power Supplies
n High Availability Systems
n AdvancedTCA Systems
n Telecom Infrastructure
n Automotive Systems
LTC4357
Positive High Voltage
Ideal Diode Controller
Description
The LTC®4357 is a positive high voltage ideal diode control-
ler that drives an external N-channel MOSFET to replace a
Schottky diode. When used in diode-OR and high current
diode applications, the LTC4357 reduces power consump-
tion, heat dissipation, voltage loss and PC board area.
The LTC4357 easily ORs power sources to increase total
system reliability. In diode-OR applications, the LTC4357
controls the forward voltage drop across the MOSFET to
ensure smooth current transfer from one path to the other
without oscillation. If the power source fails or is shorted,
a fast turn-off minimizes reverse current transients.
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.
Typical Application
48V, 10A Diode-OR
VINA
FDB3632
48V
IN
GATE
OUT
LTC4357
VDD
GND
VOUT TO LOAD
VINB
FDB3632
48V
IN
GATE
OUT
LTC4357
GND
VDD
4357 TA01
*SEE FIGURES 2 AND 3 FOR ADDITIONAL OPTIONAL COMPONENTS
Power Dissipation vs Load Current
6
5
DIODE (MBR10100)
4
3
POWER
SAVED
2
1
FET (FDB3632)
0
0
2
4
6
8
10
CURRENT (A)
4357 TA01b
4357fd



Linear Technology Electronic Components Datasheet

LTC4357MPMS8 Datasheet

Positive High Voltage Ideal Diode Controller

No Preview Available !

LTC4357
Absolute Maximum Ratings (Notes 1, 2)
Supply Voltages
IN............................................................ –1V to 100V
OUT, VDD............................................... –0.3V to 100V
Output Voltage
GATE (Note 3)........................ VIN – 0.2V to VIN + 10V
Operating Ambient Temperature Range
LTC4357C................................................. 0°C to 70°C
LTC4357I.............................................. –40°C to 85°C
LTC4357H........................................... –40°C to 125°C
LTC4357MP........................................ –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Package...................................................... 300°C
pin Configuration
TOP VIEW
OUT 1
6 VDD
IN 2
7
GND
5 NC
GATE 3
4 GND
DCB PACKAGE
6-LEAD (2mm s 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 90°C/W
EXPOSED PAD (PIN 7) PCB GND CONNECTION OPTIONAL
TOP VIEW
IN 1
NC 2
NC 3
GATE 4
8 OUT
7 VDD
6 NC
5 GND
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 163°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC4357CMS8#PBF
LTC4357IMS8#PBF
LTC4357HMS8#PBF
LTC4357MPMS8#PBF
LEAD BASED FINISH
LTC4357MPMS8
TAPE AND REEL
LTC4357CMS8#TRPBF
LTC4357IMS8#TRPBF
LTC4357HMS8#TRPBF
LTC4357MPMS8#TRPBF
TAPE AND REEL
LTC4357MPMS8#TR
PART MARKING*
LTCXD
LTCXD
LTCXD
LTFWZ
PART MARKING*
LTFWZ
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
LEAD FREE FINISH
TAPE AND REEL (MINI)
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
LTC4357CDCB#TRMPBF LTC4357CDCB#TRPBF LCXF
6-Lead (2mm × 3mm) Plastic DFN
LTC4357IDCB#TRMPBF LTC4357IDCB#TRPBF LCXF
6-Lead (2mm × 3mm) Plastic DFN
LTC4357HDCB#TRMPBF LTC4357HDCB#TRPBF LCXF
6-Lead (2mm × 3mm) Plastic DFN
TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on 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/

TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
TEMPERATURE RANGE
–55°C to 125°C
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
4357fd


Part Number LTC4357MPMS8
Description Positive High Voltage Ideal Diode Controller
Maker Linear
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