LTC3447 Buck Converter overview

Description

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LTC3447 is a 5.50 V sync Buck Converter from with 0.60 A output current. The maximum 5.50 V input voltage can be regulated down into a 0.69 V to 2.05 V output voltage.

It requires are a typical inductor size of 3.30 µH, a typical external component count of 7 and achieves a peak efficiency of 93 %. Further LTC3447 characteristics are a fixed 1000 kHz switching frequency and 1 available package option(s): DFN-10 .

For the LTC3447 replacement search, please select a main parameter tolerance value and adjust the checkboxes for feature match. The product counter within the button shows the number of available equivalents and a click on the replacement button shows all possible replacements within a parametric overview.

ParameterValueReplacement
Search Filter
V-IN min. 2.50 V
V-IN max. 5.50 V
I-OUT? 0.60 A
V-OUT min. 0.69 V
V-OUT max. 2.05 V
V-OUT adjustable V
V-OUT programmable yes
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. 400 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ. 150 °C
Inductor size typ. 3.30 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 93 %
Component count min. 7
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LTC3447 Datasheet

Link to the most up-to-date LTC3447 datasheet and the product page for EVM, tools and support information.

LTC3447

LTC3447 Sample stock and distributor price breaks

LTC3447 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 5

ARROW-NAC (1)

ProductStockPriceBuy
LTC3447EDD#PBF1332
12.79 USD
1002.29 USD
Buy Now

Chip-One-Stop (1)

ProductStockPriceBuy
LTC3447EDD#PBF2235
14.41 USD
103.71 USD
253.67 USD
503.50 USD
1003.42 USD
2003.26 USD
Buy Now

DIGI-KEY (2)

ProductStockPriceBuy
LTC3447EDD#PBF743
13.92 USD
252.79 USD
1002.29 USD
Buy Now
DC767A2
1100.50 USD
Buy Now
LTC3447EDD#TRPBF0
25002.39 USD
Buy Now

Element14 (1)

ProductStockPriceBuy
LTC3447EDD#PBF224
16.27 USD
254.46 USD
1003.66 USD
Buy Now

FARNELL-ELEMENT14 (1)

ProductStockPriceBuy
LTC3447EDD#PBF224Buy Now

Available Distributors without stock: 1

NEWARK (0)

ProductStockPriceBuy
LTC3447EDD#PBF0
12.29 USD
Buy Now
LTC3447EDD#TRPBF0
14.05 USD
25002.91 USD
Buy Now

Available Distributors with stock: 0

no online Distributor with LTC3447 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3447. Optional, compare LTC3447 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% AAT2503 AAT2503 product overviewAAT2503 product overview Skyworks QFN-20
0% AAT2504 AAT2504 product overviewAAT2504 product overview Skyworks QFN-20

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3447.

V-IN max. 5.5 V, I-OUT 0.6 A, V-OUT min. 0.69 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744028003 3.3 1.0 0.9 185.00 2.8 x 2.8 x 1.2
744029003 3.3 1.3 1.0 110.00 2.8 x 2.8 x 1.5
744030003 3.3 0.7 0.7 198.00 3.3 x 3.5 x 1.05
744031002 2.5 1.5 1.3 50.00 3.8 x 3.8 x 1.8
744031003 3.6 1.4 1.1 66.00 3.8 x 3.8 x 1.8
74404024033 3.3 1.4 1.3 120.00 2.5 x 2 x 1.2
74479888233 3.3 1.1 1.1 250.00 2.5 x 2 x 1
74479889233 3.3 1.3 1.3 250.00 2.5 x 2 x 1.2
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