LTC3605 Buck Converter overview



LTC3605 is a 15.00 V sync Buck Converter from with 5.00 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 1.00 µH, a typical external component count of 12 and achieves a peak efficiency of 95 %. Further LTC3605 characteristics are a adjustable 1000 kHz switching frequency and 1 available package option(s): QFN-24 .

For the LTC3605 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.

Search Filter
V-IN min. 4.00 V
V-IN max. 15.00 V
I-OUT? 5.00 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. 800 kHz
Frequency adj./ ext.clock max 4000 kHz
Softstart yes
Softstart adjustable yes
Tracking yes
PG/Power OK yes
Quiescent current max. 5000 µA
Operating min. -40 °C
Operating max. 125 °C
Junction min.
Junction max.
thermal shutdown typ. 160 °C
Inductor size typ. 1.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 95 %
Component count min. 12
current limit adjustable no
Nr.of packages 1

LTC3605 Datasheet

Link to the most up-to-date LTC3605 datasheet and the product page for EVM, tools and support information.


LTC3605 Sample stock and distributor price breaks

LTC3605 prices and online available distributors.

Available Distributors with stock: 0

no online Distributor with LTC3605 stock available

Available Distributors with stock: 0

no online Distributor with LTC3605 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3605. Optional, compare LTC3605 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3605A LTC3605A product overviewLTC3605A product overview Linear Technology QFN-24
0% TPS54020 TPS54020 product overviewTPS54020 product overview Texas Instruments VQFN-15
0% TPS54623 TPS54623 product overviewTPS54623 product overview Texas Instruments QFN-14
0% TPS54821 TPS54821 product overviewTPS54821 product overview Texas Instruments VQFN-14
10% IR3856M IR3856M product overviewIR3856M product overview IRF PQFN-17
10% IR3856WM IR3856WM product overviewIR3856WM product overview IRF PQFN-17
25% IR3853M IR3853M product overviewIR3853M product overview IRF PQFN-17
25% LT3690 LT3690 product overviewLT3690 product overview Linear Technology QFN-26
25% TPS54521 TPS54521 product overviewTPS54521 product overview Texas Instruments VQFN-14
50% LTC3603 LTC3603 product overviewLTC3603 product overview Linear Technology QFN-16, MSOP-16
50% LTC3604 LTC3604 product overviewLTC3604 product overview Linear Technology QFN-16, MSOP-16
50% LTC3626 LTC3626 product overviewLTC3626 product overview Linear Technology QFN-20

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3605.

V-IN max. 15 V, I-OUT 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)
74407000047 0.5 7.8 6.5 5.80 8 x 8 x 2
744373210047 0.5 5.4 9.0 18.00 4.45 x 4.06 x 1.2
744383360033 0.3 5.5 8.3 14.00 3 x 3 x 2
744383560033 0.3 9.6 12.4 6.00 4.1 x 4.1 x 2.1
744778005 0.5 5.6 9.0 7.20 7.3 x 7.3 x 3.4
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