Datasheet

LTC4359
1
Rev. E
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TYPICAL APPLICATION
FEATURES DESCRIPTION
Ideal Diode Controller with
Reverse Input Protection
The LT C
®
4359 is a positive high voltage ideal diode control-
ler that drives an external N-channel MOSFET to replace
a Schottky diode. It controls the for
ward-voltage drop
across the MOSFET to ensure smooth current delivery
without oscillation even at light loads. If a power source
fails or is shorted, a fast turn-off minimizes reverse cur
-
rent transients. A shutdown mode is available to reduce
the quiescent current to
9μA for load switch and 14µA for
ideal diode applications.
When used in high current diode applications, the LTC4359
reduces power consumption, heat dissipation, voltage loss
and PC board area. With its wide operating voltage range,
the ability to withstand reverse input voltage, and high
temperature rating, the LTC4359 satisfies the demanding
requirements of both automotive and telecom applications.
The LTC4359 also easily ORs power sources in systems
with redundant supplies.
12V, 20A Automotive Reverse-Battery Protection Power Dissipation vs Load Current
APPLICATIONS
n
Reduces Power Dissipation by Replacing a Power
Schottky Diode
n
Wide Operating Voltage Range: 4V to 80V
n
Reverse Input Protection to – 40V
n
Low 9µA Shutdown Current
n
Low 150μA Operating Current
n
Smooth Switchover without Oscillation
n
Controls Single or Back-to-Back N-Channel MOSFETs
n
Available in 6-Pin (2mm × 3mm) DFN, 8-Lead MSOP
and 8-Lead SO Packages
n
AEC-Q100 Qualified for Automotive Applications
n
Automotive Battery Protection
n
Redundant Power Supplies
n
Supply Holdup
n
Telecom Infrastructure
n
Computer Systems/Servers
n
Solar Systems
All registered trademarks and trademarks are the property of their respective owners.
4359 TA01
LTC4359
V
SS
SHDN
IN SOURCE OUT
47nF
1k
GATE
BSC028N06NS
SMAT70A
70V
SMAJ24A
24V
V
IN
12V
V
OUT
TO LOAD
CURRENT (A)
0
POWER DISSIPATION (W)
4
8
6
20
4359 TA01a
2
0
5
10
15
10
SCHOTTKY DIODE (SBG2040CT)
POWER
SAVED
MOSFET (BSC028N06NS)
Downloaded from Arrow.com.

Summary of content (20 pages)