鈻?/div>
DESCRIPTIO
2-Channel Ideal Diode ORing or Load Sharing
Low Loss Replacement for ORing Diodes
Low Forward ON Resistance (100m鈩?Max at 3.6V)
Low Reverse Leakage Current (1碌A(chǔ) 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
脳
3mm DFN
Package
The LTC
廬
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 100m鈩?/div>
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 40碌A(chǔ) 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 1碌A(chǔ) 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 9碌A(chǔ) 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.
APPLICATIO S
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
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.
TYPICAL APPLICATIO
ENBA
GND
ENBB
WALL
ADAPTER
(0V TO 5.5V)
INB
10碌F
LTC4413 vs 1N5817 Schottky
2000
V
CC
LTC4413
STAT
OUTB
470k
STAT IS HIGH WHEN
BAT IS SUPPLYING
LOAD CURRENT
1500
I
OUT
(mA)
1000
1N5817
CONTROL CIRCUIT
INA
BAT
OUTA
4.7碌F
4413 TA01
500
TO LOAD
0
0
100
200
V
FWD
(mV)
300
400
4413 TA01b
U
LTC4413
4413f
U
U
1
LTC4351相關(guān)型號PDF文件下載
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