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LTC4373HMS8 Datasheet

Low Quiescent Current Ideal Diode Controller

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LTC4372/LTC4373
Low Quiescent Current Ideal Diode Controller
FEATURES
n Reduces Power Dissipation by Replacing a Power
Schottky Diode
n Low Quiescent Current: 5µA Operating, 0.5µA
Shutdown
n Wide Operating Voltage Range: 2.5V to 80V
n Reverse Supply Protection to –28V
n High Side External N-Channel MOSFET Drive
n Drives Back-to-Back MOSFETs for Inrush Control and
Load Switching
n Fast Reverse Current Turn-Off within 1.5µs
n 8-Lead MSOP and 3mm × 3mm DFN Packages
APPLICATIONS
n Automotive Battery Protection
n Redundant Power Supplies
n Portable Instrumentation
n Solar Powered Systems
n Energy Harvesting Applications
n Supply Holdup
DESCRIPTION
The LTC®4372/LTC4373 are positive high voltage ideal
diode controllers that drive an external N-channel
MOSFET to replace a Schottky diode. They control the
forward voltage drop across the MOSFET to ensure cur-
rent delivery or current transfer from one path to the other
even at light loads.
A 5µA operating current achieves high efficiency for inter-
mittent load applications or always-on backup power sup-
plies. If a power source fails or is shorted, a fast turn-
off minimizes reverse current transients. The LTC4372/
LTC4373 control back-to-back N-channel MOSFETs for
inrush current control and load switching.
The LTC4372 shutdown function reduces the quiescent
current to 0.5µA. The LTC4373 has a UV pin for undervolt-
age monitoring while the UVOUT pin provides hysteresis
adjustment and status information. During undervoltage,
the back-to-back MOSFETs are cut off and quiescent cur-
rent reduces to 0.5μA.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
12V, 20A Reverse Battery Protection
VIN = 12V
BSC026N08NS5
IN SOURCE GATE
2UPU
LTC4372
GND
SHDN
OUT
INTVCC
43723 TA01a
100nF
VOUT
12V
20A
10μF
Power Dissipation vs Load Current
10
8
SCHOTTKY DIODE (SBG2040CT)
6
4
POWER
SAVED
2
MOSFET (BSC026N08NS5)
0
0
5
10
15
20
CURRENT (A)
43723 TA01b
Rev. 0
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For more information www.analog.com
1


Analog Devices Semiconductor Electronic Components Datasheet

LTC4373HMS8 Datasheet

Low Quiescent Current Ideal Diode Controller

No Preview Available !

LTC4372/LTC4373
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
IN, SOURCE................................................–28V to 100V
OUT...............................................................–2V to 100V
IN – OUT ..................................................–100V to 100V
IN – SOURCE................................................–1V to 100V
SOURCE – OUT.........................................–100V to 100V
GATE – SOURCE (Note 3)........................... –0.3V to 10V
SHDN, UV, 2UPU, UVOUT......................... –0.3V to 100V
INTVCC.......................................................... –0.3V to 6V
Operating Ambient Temperature Range
LTC4372C, LTC4373C............................... 0°C to 70°C
LTC4372I, LTC4373I.............................–40°C to 85°C
LTC4372H, LTC4373H........................ –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 Sec)
MSOP Package.................................................. 300°C
PIN CONFIGURATION
LTC4372
TOP VIEW
OUT 1
8 SHDN
GATE 2
7 2UPU
9
SOURCE 3
6 GND
IN 4
5 INTVCC
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 9) PCB CONNECTION TO GND IS OPTIONAL
LTC4373
TOP VIEW
OUT 1
8 UV
GATE 2
7 UVOUT
9
SOURCE 3
6 GND
IN 4
5 INTVCC
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 9) PCB CONNECTION TO GND IS OPTIONAL
LTC4372
TOP VIEW
OUT 1
GATE 2
SOURCE 3
IN 4
8 SHDN
7 2UPU
6 GND
5 INTVCC
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 163°C/W
LTC4373
TOP VIEW
OUT 1
GATE 2
SOURCE 3
IN 4
8 UV
7 UVOUT
6 GND
5 INTVCC
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 163°C/W
Rev. 0
2
For more information www.analog.com


Part Number LTC4373HMS8
Description Low Quiescent Current Ideal Diode Controller
Maker Analog Devices
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