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LTC4412

更新时间： 2024-11-12 21:55:23
品牌 Logo 应用领域
凌特 - Linear 二极管
页数 文件大小 规格书
12页 154K
描述
Dual 2.6A, 2.5V to 5.5V, Ideal Diodes in 3mm 3mm DFN

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LTC4412 数据手册

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LTC4413  
Dual 2.6A, 2.5V to 5.5V,  
Ideal Diodes in 3mm × 3mm DFN  
U
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.  
■
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  
■
■
■
■
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.  
■
U
APPLICATIO S  
■
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.  
■
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.  
The LTC4413 is housed in a 10-lead DFN package.  
U
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
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