LTC4413-1 Datasheet, PDF (1/16 Pages) Linear Technology – Dual 2.6A, 2.5V to 5.5V Fast Ideal Diodes in 3mm × 3mm DFN

FEATURES
■ _{2-Channel Ideal Diode OR’ing or Load Sharing}
■ _{Low Loss Replacement for PowerPath}^TM _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
APPLICATIONS
■ _{Battery and Wall Adapter Diode OR’ing in Handheld}
Products
■ _{Backup Battery Diode OR’ing}
■ _{Power Switching}
■ _{USB Peripherals}
■ _{Uninterruptable Supplies}
LTC4413-1/LTC4413-2
Dual 2.6A, 2.5V to 5.5V
Fast Ideal Diodes
in 3mm × 3mm DFN
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
diodes use a 100mΩ P-channel MOSFET to independently
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
fault conditions. An internal overvoltage protection sensor
detects when a voltage exceeds the LTC4413-2 absolute
maximum voltage tolerance.
Two active-high control pins independently turn off the two
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.
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.
TYPICAL APPLICATION
Automatic Switchover from a Battery to a Wall Adapter
WALL
ADAPTER
INPUT
0.1μF
1Ω
FDR8508
INA
OUTA
10μF
IDEAL
ENBA
STAT
LTC4413-2
GND
OVI
ENBB
OVP
BAT
INB
OUTB
+
IDEAL
V_CC
470k
STAT
OVP
TO LOAD
4.7μF
441312 TA01a
STAT IS HIGH WHEN WALL ADAPTER IS
SUPPLYING LOAD CURRENT
OVP IS HIGH WHEN WALL ADAPTER VOLTAGE > 6V
Power Loss vs Load
700
600
500
LTC4413-1
400
300
1N5817
200
100
0
0 500 1000 1500 2000 2500 3000
LOAD (mA)
441312 TA01b
441312fb
1