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LTC4376 bảng dữ liệu(PDF) 1 Page - Analog Devices

tên linh kiện LTC4376
Giải thích chi tiết về linh kiện  28V, 2A Ideal Diode and Load Switch
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LTC4376 bảng dữ liệu(HTML) 1 Page - Analog Devices

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Data Sheet
LT4423
28V, 2A Ideal Diode and Load Switch
Rev. 0
DOCUMENT FEEDBACK
TECHNICAL SUPPORT
One Analog Wa y, Wilmington, MA 01887 -2356, U.S.A.
Tel: 781.329.47 00
©2024 Analog Devices, Inc. Al l rights rese rve d.
FEATURES
Internal 200mΩ Power Path
Wide Operating Voltage Range: 1.9V to 28V
Reverse Current Protection
Load Switch Capability
Low 10µA Quiescent Current
Fast 3µs Response to Load Steps
Low 500nA Off State Current
Smooth Switchover in Diode-OR Applications
Integrated Thermal Protection
10-Lead (3mm x 2mm x 0.75mm) LDFN Package
APPLICATIONS
Schottky Diode Replacement
Battery and Wall Adapter Diode ORing
Backup Battery Diode ORing
Industrial and Consumer Hand-Held Applications
GENERAL DESCRIPTION
The LT®4423 is a 1.9V to 28V ideal diode and load switch
with integrated P-channel MOSFETs. When enabled,
15mV forward voltage regulation minimizes power
dissipation while increasing operating headroom and
efficiency compared to a Schottky diode.
Using two LT4423s in diode-OR applications provide a
seamless transfer to the highest available voltage under
varying input supply conditions. A non-enabled LT4423
blocks up to 28V in either direction or polarity while
exhibiting less than 1μA (typical) leakage current,
providing orders of magnitude improvement over
typical Schottky diodes, which leads to extended
battery life.
Fast OUT to IN reverse bias detection minimizes reverse
current, preventing undesired charging of input
batteries. The open-drain STATUS output pulls low
when the LT4423 is in shutdown, reverse bias, or under
thermal protection. Integrated thermal detection
protects from overtemperature conditions by disabling
the power path.
All registered trademarks and trademarks are the property of their
respective owners.
SIMPLIFIED APPLICATION DIAGRAM
Figure 1. USB PD 3.0 and Back-Up Battery Supply
Figure 2. LT4423 I-V CURVE
TO LOAD
USB PD 3.0
PRIMARY
POWER SOURCE
5V TO 20V
BACK-UP
Li-Ion CELL
3.6V
ON OFF
R1
4.7kΩ
SHDN
SHDN
D1
C1
1µF
N/C
GND
IN
OUT
STATUS
LT4423
GND
IN
OUT
STATUS
LT4423
TA = 25°C
IN = 12V
2 IN2 THERMAL RELIEF
DC FORWARD VOLTAGE DROP (mV)
10
100
400
0.001
0.01
0.1
1
2


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