LTC3603 Buck Converter overview

Description

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Sub-Category

LTC3603 is a 15.00 V sync Buck Converter from with 2.50 A output current. The maximum 15.00 V input voltage can be regulated down into a 0.60 V to 14.85 V output voltage.

It requires are a typical inductor size of 2.20 µH, a typical external component count of 11 and achieves a peak efficiency of 95 %. Further LTC3603 characteristics are a adjustable 1000 kHz switching frequency and 2 available package option(s): MSOP-16 QFN-16 .

For the LTC3603 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. 4.50 V
V-IN max. 15.00 V
I-OUT? 2.50 A
V-OUT min. 0.60 V
V-OUT max. 14.85 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 300 kHz
Frequency adj./ ext.clock max 3000 kHz
Softstart yes
Softstart adjustable yes
Tracking yes
PG/Power OK yes
Quiescent current max. 700 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 160 °C
Inductor size typ. 2.20 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 95 %
Component count min. 11
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN QFN-16
SO/SOIC
SOP
DIP
TO
DDPAK

LTC3603 Datasheet

Link to the most up-to-date LTC3603 datasheet and the product page for EVM, tools and support information.

LTC3603

LTC3603 Sample stock and distributor price breaks

LTC3603 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 7

ARROW-NAC (3)

ProductStockPriceBuy
LTC3603IMSE#PBF154
15.46 USD
1004.64 USD
Buy Now
LTC3603IUF#PBF864
15.46 USD
1004.64 USD
Buy Now
LTC3603EUF#PBF585
14.64 USD
1003.95 USD
Buy Now

Chip-One-Stop (4)

ProductStockPriceBuy
LTC3603EMSE#PBF2
26.23 USD
Buy Now
LTC3603EMSE#PBF80
17.51 USD
56.42 USD
106.27 USD
505.91 USD
Buy Now
LTC3603EUF#PBF728
17.32 USD
56.25 USD
106.10 USD
505.75 USD
1005.42 USD
2005.30 USD
Buy Now
LTC3603IMSE#PBF838
110.70 USD
510.40 USD
108.25 USD
507.44 USD
1006.69 USD
2006.30 USD
Buy Now

DIGI-KEY (4)

ProductStockPriceBuy
LTC3603EUF#PBF541
16.93 USD
254.64 USD
1003.95 USD
Buy Now
LTC3603EMSE#PBF459
16.93 USD
254.64 USD
1003.95 USD
Buy Now
LTC3603IMSE#PBF333
18.17 USD
255.46 USD
1004.64 USD
Buy Now
LTC3603IUF#PBF221
18.17 USD
255.46 USD
1004.64 USD
Buy Now
LTC3603EMSE#TRPBF0
25004.05 USD
Buy Now
LTC3603EUF#TRPBF0
25004.05 USD
Buy Now
LTC3603IMSE#TRPBF0
25004.74 USD
Buy Now
LTC3603IUF#TRPBF0
25004.74 USD
Buy Now

Element14 (2)

ProductStockPriceBuy
LTC3603EMSE#PBF101
111.08 USD
257.42 USD
1006.32 USD
Buy Now
LTC3603EUF#PBF0
111.08 USD
257.42 USD
1006.32 USD
Buy Now
LTC3603IMSE#PBF1
113.06 USD
258.73 USD
1007.42 USD
Buy Now

FARNELL-ELEMENT14 (2)

ProductStockPriceBuy
LTC3603EMSE#PBF127Buy Now
LTC3603IMSE#PBF1Buy Now

NEWARK (1)

ProductStockPriceBuy
LTC3603EMSE#PBF0
13.95 USD
253.95 USD
1003.95 USD
Buy Now
LTC3603EUF#PBF0
14.11 USD
Buy Now
LTC3603EUF#TRPBF0
16.73 USD
25004.83 USD
Buy Now
LTC3603IMSE#PBF0
18.17 USD
255.48 USD
1004.64 USD
Buy Now
LTC3603IUF#PBF14
14.64 USD
254.64 USD
1004.64 USD
Buy Now
LTC3603IUF#TRPBF0
17.92 USD
25005.68 USD
Buy Now

RS-COMPONENTS (2)

ProductStockPriceBuy
LTC3603EMSE#PBF21Buy Now
LTC3603EUF#PBF11Buy Now

Available Distributors without stock: 1

Mouser-Electronics (0)

ProductStockPriceBuy
RK73H1HLTC3603FNoneBuy Now

Available Distributors with stock: 0

no online Distributor with LTC3603 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3603. Optional, compare LTC3603 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3604 LTC3604 product overviewLTC3604 product overview Linear Technology QFN-16, MSOP-16
0% LTC3626 LTC3626 product overviewLTC3626 product overview Linear Technology QFN-20
50% LTC3600 LTC3600 product overviewLTC3600 product overview Linear Technology DFN-12, MSOP-12
50% LTC3601 LTC3601 product overviewLTC3601 product overview Linear Technology QFN-16, MSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3603.

V-IN max. 15 V, I-OUT 2.5 A, V-OUT min. 0.6 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74402500072 0.7 3.0 4.0 23.50 2.8 x 2.8 x 3
744040240068 0.7 2.5 3.5 35.00 2.5 x 2 x 1.2
74404041010 1.0 2.5 3.4 41.00 4 x 4 x 1.2
74404042010 1.0 3.2 4.8 27.00 4 x 4 x 1.8
74404052010 1.0 3.9 5.5 19.80 5 x 5 x 2
74404300082 0.8 3.5 3.7 14.00 4.8 x 4.8 x 3
744062001 1.0 4.8 4.6 10.00 6.8 x 6.8 x 2.5
7440680010 1.0 2.8 3.3 32.00 8 x 8 x 1.2
7440690010 1.0 3.6 3.8 21.00 8 x 8 x 1.5
74407000082 0.8 6.2 5.5 8.50 8 x 8 x 2
744089410068 0.7 3.4 6.5 22.10 4.8 x 4.8 x 2.1
74408941010 1.0 3.0 5.4 29.50 4.8 x 4.8 x 2.1
74408943010 1.0 3.3 6.5 19.00 4.8 x 4.8 x 4.1
744383230068 0.7 3.1 4.7 46.00 2.5 x 2 x 1
744383230082 0.8 2.6 4.3 53.00 2.5 x 2 x 1
74438323010 1.0 2.5 4.0 63.00 2.5 x 2 x 1
744383240068 0.7 3.2 5.9 45.00 2.5 x 2 x 1.2
74438324010 1.0 2.8 4.9 49.00 2.5 x 2 x 1.2
74438334010 1.0 2.8 6.6 42.10 3 x 3 x 1.2
74438335010 1.0 2.7 4.5 39.00 3 x 3 x 1.5
744383360068 0.7 4.5 6.2 22.00 3 x 3 x 2
74438336010 1.0 4.0 5.0 26.00 3 x 3 x 2
7447730 1.0 4.0 5.7 14.00 4 x 4.5 x 3.5
744778001 1.0 5.4 6.4 9.00 7.3 x 7.3 x 3.4
7447785001 1.0 3.5 4.5 31.00 5.9 x 6.2 x 3.3
7447786001 1.0 5.0 5.5 28.00 5.9 x 6.2 x 5.1
7447789001 1.0 5.4 6.4 10.00 7.3 x 7.3 x 3.5
74479276168 0.7 2.5 3.4 45.00 2 x 1.6 x 1
74479298210 1.0 2.5 4.0 45.00 3.2 x 2.5 x 1
74479299210 1.0 3.0 5.2 38.00 3.2 x 2.5 x 1.2
784383230068 0.7 3.1 4.7 46.00 2.5 x 2 x 1
784383230082 0.8 2.6 4.3 53.00 2.5 x 2 x 1
78438323010 1.0 2.5 4.0 63.00 2.5 x 2 x 1
78438334010 1.0 2.8 6.6 42.10 3 x 3 x 1.2
78438335010 1.0 2.7 4.5 39.00 3 x 3 x 1.5
7847730 1.0 4.0 5.7 14.00 4 x 4.5 x 3.5
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