LTC4413-1/LTC4413-2
Dual 2.6A, 2.5V to 5.5V
Fast Ideal Diodes
in 3mm × 3mm DFN
FEATURES
DESCRIPTION
The LTC®4413-1 and LTC4413-2 each contain two mono-
lithic ideal diodes, each capable of supplying up to 2.6A
from input voltages between 2.5V and 5.5V. The ideal
diodesusea100mΩP-channelMOSFETtoindependently
connect INA to OUTA and INB to OUTB. During normal
forward operation, the voltage drops across each of
these diodes are regulated to as low as 18mV. Quiescent
current is less than 80μA for diode currents up to 1A. If
either of the output voltages exceeds its respective input
voltage, that MOSFET is turned off and less than 1μA of
reverse current flows from OUT to IN. Maximum forward
current in each MOSFET is limited to a constant 2.6A and
internal thermal limiting circuits protect the part during
faultconditions.Aninternalovervoltageprotectionsensor
detects when a voltage exceeds the LTC4413-2 absolute
maximum voltage tolerance.
■
2-Channel Ideal Diode OR’ing or Load Sharing
Low Loss Replacement for PowerPathTM OR’ing
■
Diodes
■
Fast Response Replacement for LTC4413
■
Low Forward On Resistance (140mΩ Max at 3.6V)
■
Low Reverse Leakage Current
■
Low Regulated Forward Voltage (18mV Typ)
■
Overvoltage Protection Sensor with Drive Output for
an External P-Channel MOSFET (LTC4413-2 Only)
■
2.5V to 5.5V Operating Range
■
2.6A Maximum Forward Current
■
Internal Current Limit Protection
■
Internal Thermal Protection
■
Status Output to Indicate if Selected Channel is
Conducting
Programmable Channel On/Off
■
■
Low Profile (0.75mm) 10-Lead 3mm × 3mm DFN
Package
Twoactive-highcontrolpinsindependentlyturnoffthetwo
ideal diodes contained within the LTC4413-1/LTC4413-2.
When the selected channel is reverse biased, or the
LTC4413-1/LTC4413-2 is put into low power standby, the
status signal is pulled low by an 11μA open drain.
APPLICATIONS
■
Battery and Wall Adapter Diode OR’ing in Handheld
Products
The LTC4413-1/LTC4413-2 are housed in a 10-lead 3mm
× 3mm DFN package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PowerPath is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
■
Backup Battery Diode OR’ing
■
Power Switching
USB Peripherals
■
■
Uninterruptable Supplies
TYPICAL APPLICATION
Automatic Switchover from a Battery to a Wall Adapter
FDR8508
Power Loss vs Load
700
600
V
CC
WALL
ADAPTER
INPUT
INA
OUTA
500
470k
STAT
10μF
LTC4413-1
IDEAL
0.1μF
1Ω
ENBA
STAT
400
LTC4413-2
GND
OVI
300
1N5817
ENBB
INB
OVP
OUTB
OVP
200
BAT
TO LOAD
+
4.7μF
IDEAL
100
0
441312 TA01a
0
500
1000 1500 2000 2500 3000
STAT IS HIGH WHEN WALL ADAPTER IS
SUPPLYING LOAD CURRENT
LOAD (mA)
441312 TA01b
OVP IS HIGH WHEN WALL ADAPTER VOLTAGE > 6V
441312fb
1