LTC4413
Dual 2.6A, 2.5V to 5.5V,
Ideal Diodes in 3mm × 3mm DFN
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FEATURES
DESCRIPTIO
The LTC®4413 contains two monolithic ideal diodes, each
capable of supplying up to 2.6A from input voltages be-
tween 2.5V and 5.5V. Each ideal diode uses a 100mΩ
P-channel MOSFET that independently connects INA to
OUTA and INB to OUTB. During normal forward operation
the voltage drop across each of these diodes is regulated
to as low as 28mV. Quiescent current is less than 40µA for
diode currents up to 1A. If either of the output voltages
exceedsitsrespectiveinputvoltages,thatMOSFETisturned
off and less than 1µA of reverse current will flow from OUT
to IN. Maximum forward current in each MOSFET is lim-
ited to a constant 2.6A and internal thermal limiting cir-
cuits protect the part during fault conditions.
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2-Channel Ideal Diode ORing or Load Sharing
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Low Loss Replacement for ORing Diodes
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Low Forward ON Resistance (100mΩ Max at 3.6V)
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Low Reverse Leakage Current (1µA Max)
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Small Regulated Forward Voltage (28mV Typ)
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2.5V to 5.5V Operating Range
2.6A Maximum Forward Current
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Internal Current Limit and Thermal Protection
Slow Turn-Off to Protect Against Inductive Source
Impedance-Induced Voltage Spiking
Low Quiescent Current
Status Output to Indicate if Selected Channel is
Conducting
Programmable Channel ON/OFF
Low Profile (0.75mm) 10-Lead 3mm × 3mm DFN
Package
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Two active-high control pins independently turn off the
two ideal diodes contained within the LTC4413, control-
lingtheoperationmodeasdescribedbyTable3. Whenthe
selected channel is reverse biased, or the LTC4413 is put
into low power standby, a status signal indicates this con-
dition with a low voltage.
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APPLICATIO S
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Battery and Wall Adapter Diode ORing in Handheld
Products
A 9µA open-drain STAT pin is used to indicate conduction
status.Whenterminatedtoapositivesupplythrougha470k
resistor, the STAT pin can be used to indicate that the se-
lecteddiodeisconductingwithaHIGHvoltage. Thissignal
can also be used to drive an auxiliary P-channel MOSFET
powerswitchtocontrolathirdalternatepowersourcewhen
the LTC4413 is not conducting forward current.
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Backup Battery Diode ORing
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Power Switching
USB Peripherals
Uninterruptable Supplies
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, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
The LTC4413 is housed in a 10-lead DFN package.
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TYPICAL APPLICATIO
LTC4413 vs 1N5817 Schottky
2000
V
CC
ENBA
470k
1500
GND LTC4413
ENBB
STAT IS HIGH WHEN
BAT IS SUPPLYING
STAT
OUTB
LTC4413
LOAD CURRENT
WALL
ADAPTER
(0V TO 5.5V)
INB
1000
10µF
1N5817
CONTROL CIRCUIT
500
INA
OUTA
TO LOAD
0
BAT
4.7µF
0
200
(mV)
300
400
100
4413 TA01
V
4413 TA01b
FWD
4413f
1