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LTC4413-1_15

Description
Dual 2.6A, 2.5V to 5.5V Fast Ideal Diodes
File Size178KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC4413-1_15 Overview

Dual 2.6A, 2.5V to 5.5V Fast Ideal Diodes

FEATURES
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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.
L,
LT, LTC, LTM, Linear Technology and the Linear logo 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.
2-Channel Ideal Diode OR’ing or Load Sharing
Low Loss Replacement for PowerPath™ 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
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Battery and Wall Adapter Diode OR’ing in Handheld
Products
Backup Battery Diode OR’ing
Power Switching
USB Peripherals
Uninterruptable Supplies
TYPICAL APPLICATION
Automatic Switchover from a Battery to a Wall Adapter
FDR8508
WALL
ADAPTER
INPUT
INA
0.1μF
10μF
IDEAL
ENBA
STAT
LTC4413-2
GND
OVI
BAT
ENBB
INB
IDEAL
OVP
OUTB
OUTA
POWER LOSS (mW)
470k
STAT
500
V
CC
700
600
Power Loss vs Load
LTC4413-1
400
300
1N5817
200
100
0
0
500
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
1000 1500 2000
LOAD (mA)
2500
3000
441312 TA01b
441312fd
1

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