LT3582EUD-12#TRPBF Linear Technology, LT3582EUD-12#TRPBF Datasheet - Page 18

IC DC/DC CONV +/-12V 16-QFN

LT3582EUD-12#TRPBF

Manufacturer Part Number
LT3582EUD-12#TRPBF
Description
IC DC/DC CONV +/-12V 16-QFN
Manufacturer
Linear Technology
Type
Step-Up (Boost), Invertingr
Datasheet

Specifications of LT3582EUD-12#TRPBF

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
2
Voltage - Output
±12V
Current - Output
350mA, 600mA
Voltage - Input
2.55 ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-WQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Frequency - Switching
-

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LT
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LT3582/LT3582-5/LT3582-12
APPLICATIONS INFORMATION
Choosing Inductors
Several series of inductors that work well with the LT3582
series are listed in Table 3. This table is not complete, and
there are many other manufacturers and parts that can
be used. Consult each manufacturer for more detailed
information and for their entire selection of related parts,
as many different sizes and shapes are available.
Table 3. Inductor Manufacturers
Coilcraft
Murata
Sumida
TDK
Würth
Elektronik
Inductances of 2.2μH to 10μH typically result in a good
tradeoff between inductor size and system performance.
More inductance typically yields an increase in effi ciency
at the expense of increased output ripple. Less inductance
may be used in a given application depending on required
effi ciency and output current. For higher effi ciency, choose
inductors with high frequency core material, such as ferrite,
to reduce core losses. Also to improve effi ciency, choose
inductors with more volume for a given inductance. The
inductor should have low DCR (copper-wire resistance)
to reduce I
inductor current without saturating. To minimize radiated
noise, use a toroidal or shielded inductor (note that the
inductance of shielded types will drop more as current
increases, and will saturate more easily).
18
2
LPS3008-LPS4018 Series,
XPL2010 Series
LQH32C, LQH43C Series
CDRH26D09, CDRH26D11,
CDRH3D14 Series
VLF and VLCF Series
WE-TPC Series Type T, TH,
XS and S
R losses, and must be able to handle the peak
www.coilcraft.com
www.murata.com
www.sumida.com
www.tdk.com
www.we-online.com
Peak Current Rating: Real inductors can experience a drop
in inductance as current and temperature increase. The
inductors should have saturation current ratings higher
than the peak inductor currents. The peak inductor cur-
rents can be calculated as:
where:
I
I
L
V
T
I
PK
LIMIT
PK
OS
LSWON
≅I
LIMIT
= Peak inductor current
= Typically 350mA for Boost and 600mA
= Inductance in μH
= Maximum inductor voltage when the
= 100 for Boost and 125 for Inverting
+
for Inverting
power switch is “on.” Typically max V
for the Boost and Inverting converters.
V
LSWON
L
• T
OS
mA
3582512fb
IN

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