LTC4413 Datasheet, PDF (1/12 Pages) Linear Technology – Dual 2.6A, 2.5V to 5.5V, Ideal Diodes in 3mm 3mm DFN

LTC4413
Dual 2.6A, 2.5V to 5.5V,
Ideal Diodes in 3mm × 3mm DFN
FEATURES
■ _{2-Channel Ideal Diode ORing or Load Sharing}
■ _{Low Loss Replacement for ORing Diodes}
■ _{Low Forward ON Resistance (100mΩ Max at 3.6V)}
■ _{Low Reverse Leakage Current (1µA Max)}
■ _{Small Regulated Forward Voltage (28mV Typ)}
■ _{2.5V to 5.5V Operating Range}
■ _{2.6A Maximum Forward Current}
■ _{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
U
APPLICATIO S
■ _{Battery and Wall Adapter Diode ORing in Handheld}
Products
■ _{Backup Battery Diode ORing}
■ _{Power Switching}
■ _{USB Peripherals}
■ _{Uninterruptable Supplies}
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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
exceeds its respective input voltages, that MOSFET is turned
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.
Two active-high control pins independently turn off the
two ideal diodes contained within the LTC4413, control-
ling the operation mode as described by Table 3. When the
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.
A 9µA open-drain STAT pin is used to indicate conduction
status. When terminated to a positive supply through a 470k
resistor, the STAT pin can be used to indicate that the se-
lected diode is conducting with a HIGH voltage. This signal
can also be used to drive an auxiliary P-channel MOSFET
power switch to control a third alternate power source when
the LTC4413 is not conducting forward current.
The LTC4413 is housed in a 10-lead DFN package.
TYPICAL APPLICATIO
WALL
ADAPTER
(0V TO 5.5V)
10µF
BAT
ENBA
GND LTC4413
ENBB
STAT
INB
OUTB
V_CC
470k
STAT IS HIGH WHEN
BAT IS SUPPLYING
LOAD CURRENT
CONTROL CIRCUIT
INA
OUTA
TO LOAD
4.7µF
4413 TA01
LTC4413 vs 1N5817 Schottky
2000
1500
1000
LTC4413
500
1N5817
0
0
100
200
300
400
V_FWD (mV)
4413 TA01b
4413f
1