LT3685 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3685 is a 36.00 V non-sync Buck Converter from with 2.00 A output current. The maximum 36.00 V input voltage can be regulated down into a 0.79 V to 20.00 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 10 and achieves a peak efficiency of 89 %. Further LT3685 characteristics are a adjustable 2400 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3685 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. 3.60 V
V-IN max. 36.00 V
I-OUT? 2.00 A
V-OUT min. 0.79 V
V-OUT max. 20.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 2400 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 2400 kHz
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 1300 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 4.70 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 89 %
Component count min. 10
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-10
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3685 Datasheet

Link to the most up-to-date LT3685 datasheet and the product page for EVM, tools and support information.

LT3685

LT3685 Sample stock and distributor price breaks

LT3685 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LT3685 stock available

Available Distributors with stock: 7

Arrow Electronics

ProductStockPriceBuy
LT3685EMSE#PBF 570
10003.54 $
5003.69 $
2503.77 $
1003.97 $
254.80 $
17.23 $
Buy Now
LT3685IDD#PBF 107
10004.12 $
5004.29 $
2504.39 $
1004.62 $
255.59 $
18.42 $
Buy Now
LT3685IDD#PBF 0
2504.52 $
1214.62 $
Buy Now
LT3685IMSE#PBF 0
10004.26 $
5004.43 $
2504.53 $
1004.77 $
Buy Now
LT3685EDD#TRPBF 0
25003.50 $
Buy Now
LT3685EDD#PBF 0
10003.44 $
5003.57 $
2503.66 $
1213.85 $
Buy Now
LT3685IDD#TRPBF 0
25004.41 $
Buy Now
LT3685IMSE#TRPBF 0
25004.32 $
Buy Now
LT3685EMSE#TRPBF 0
25003.61 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3685EDD#PBF 4116
1003.65 €
254.42 €
16.66 €
Buy Now
LT3685EMSE#PBF 3969
1003.76 €
254.55 €
16.85 €
Buy Now
LT3685IMSE#TRPBF 3106
1004.73 €
255.73 €
18.62 €
Buy Now
LT3685IMSE#TRPBF 3106
1004.73 €
255.73 €
18.62 €
Buy Now
LT3685IMSE#TRPBF 2500
25004.28 €
Buy Now
LT3685EMSE#TRPBF 1408
1003.95 €
254.78 €
17.20 €
Buy Now
LT3685EMSE#TRPBF 1408
1003.95 €
254.78 €
17.20 €
Buy Now
LT3685IMSE#PBF 1320
1004.52 €
255.47 €
18.24 €
Buy Now
LT3685IDD#PBF 503
1004.37 €
255.29 €
17.96 €
Buy Now
LT3685EDD#TRPBF 239
1003.82 €
254.62 €
16.97 €
Buy Now
LT3685EDD#TRPBF 239
1003.82 €
254.62 €
16.97 €
Buy Now
DC1212A-B 2
190.50 €
Buy Now
LT3685EDD#TRPBF 0
25003.46 €
Buy Now
LT3685EMSE#TRPBF 0
25003.58 €
Buy Now
LT3685IDD#TRPBF 0
25004.15 €
Buy Now
show stock=0hide stock=0

Verical

ProductStockPriceBuy
LT3685EMSE#PBF 2349
2503.67 $
1003.76 $
254.55 $
36.85 $
Buy Now
LT3685EMSE#PBF 570
10003.54 $
5003.69 $
2503.77 $
1003.97 $
254.80 $
27.23 $
Buy Now
LT3685IDD#PBF 107
10004.12 $
5004.29 $
2504.39 $
1004.62 $
255.59 $
28.42 $
Buy Now
LT3685IDD#PBF 27
2504.27 $
1004.37 $
255.29 $
37.97 $
Buy Now

Newark element14

ProductStockPriceBuy
LT3685EDD#PBF 32
11.36 $
101.36 $
251.36 $
501.36 $
1001.36 $
2501.36 $
5001.36 $
Buy Now

Mouser Electronics

ProductStockPriceBuy
LT3685IDD#PBF 470
18.86 $
255.88 $
1004.86 $
2504.62 $
5004.52 $
10004.34 $
Buy Now
LT3685EMSE#PBF 495
17.61 $
255.05 $
1004.18 $
2503.97 $
5003.88 $
10003.73 $
Buy Now
LT3685EDD#PBF 807
17.39 $
254.90 $
1004.05 $
2503.85 $
5003.76 $
10003.62 $
Buy Now
LT3685EDD#TRPBF 2920
17.74 $
255.13 $
1004.24 $
2504.03 $
5003.94 $
25003.68 $
Buy Now
LT3685EMSE#TRPBF 2486
18.01 $
255.31 $
1004.39 $
2504.17 $
5004.08 $
25003.80 $
Buy Now
LT3685IMSE#TRPBF 2336
19.58 $
256.36 $
1005.25 $
2504.99 $
5004.88 $
25004.55 $
Buy Now
LT3685IMSE#PBF 183
19.14 $
256.07 $
1005.02 $
2504.77 $
5004.66 $
10004.48 $
Buy Now

Quest Components

ProductStockPriceBuy
LT3685EDD#PBF 83
523.38 $
63.90 $
17.80 $
Buy Now
LT3685IDD#PBF 89
424.23 $
54.88 $
19.75 $
Buy Now
LT3685IMSE#PBF 16
135.75 $
46.32 $
18.62 $
Buy Now

RS Components

ProductStockPriceBuy
LT3685EDD#PBF 89
15.62 GBP
105.34 GBP
1213.73 GBP
2423.63 GBP
6052.82 GBP
Buy Now
LT3685EDD#PBF 89
105.34 GBP
1213.73 GBP
2423.63 GBP
6052.82 GBP
Buy Now
LT3685EDD#PBF 0
13.62 GBP
Buy Now
LT3685EMSE#PBF 0
105.49 GBP
253.84 GBP
Buy Now
LT3685EMSE#PBF 0
14.07 GBP
2503.92 GBP
5003.83 GBP
Buy Now
LT3685EMSE#PBF 18
15.78 GBP
105.49 GBP
253.84 GBP
Buy Now
LT3685IMSE#PBF 54
106.59 GBP
254.61 GBP
503.65 GBP
953.41 GBP
Buy Now
LT3685IMSE#PBF 54
16.94 GBP
106.59 GBP
254.61 GBP
503.65 GBP
953.41 GBP
Buy Now
LT3685IMSE#PBF 0
14.71 GBP
2504.59 GBP
5004.48 GBP
Buy Now
show stock=0hide stock=0

Available Distributors without stock: 3

Richardson RFPD

ProductStockPriceBuy
LT3685EDD#PBF 0
1214.11 $
5004.00 $
10003.90 $
50003.74 $
Buy Now
LT3685EMSE#PBF 0
1504.23 $
5004.12 $
10004.01 $
50003.86 $
Buy Now
LT3685IMSE#PBF 0
1505.09 $
5004.95 $
10004.81 $
50004.63 $
Buy Now
LT3685IMSE#TRPBF 0
25004.90 $
50004.71 $
Buy Now
LT3685EMSE#TRPBF 0
25004.09 $
50003.94 $
Buy Now
LT3685IDD#PBF 0
1214.93 $
5004.79 $
10004.67 $
50004.50 $
Buy Now
LT3685EDD#TRPBF 0
25003.96 $
50003.80 $
Buy Now
LT3685IDD#TRPBF 0
25004.73 $
50004.56 $
Buy Now

element14 Asia-Pacific

ProductStockPriceBuy
LT3685EMSE#PBF 0
5005.94 SGD
2506.07 SGD
1006.40 SGD
257.73 SGD
111.63 SGD
Buy Now
LT3685IMSE#PBF 0
5007.13 SGD
2507.29 SGD
1007.67 SGD
259.28 SGD
113.96 SGD
Buy Now

Farnell element14

ProductStockPriceBuy
LT3685EMSE#PBF 0
5002.63 GBP
2502.64 GBP
1002.66 GBP
502.95 GBP
253.23 GBP
104.55 GBP
15.03 GBP
Buy Now
LT3685IMSE#PBF 0
5003.20 GBP
2503.25 GBP
1003.33 GBP
503.68 GBP
254.03 GBP
105.36 GBP
16.20 GBP
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3685. Optional, compare LT3685 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% A8582 A8582 product overviewA8582 product overview Allegro TSSOP-16
0% A8583 A8583 product overviewA8583 product overview Allegro TSSOP-16
0% A8584 A8584 product overviewA8584 product overview Allegro TSSOP-16
0% LT3480 LT3480 product overviewLT3480 product overview Linear Technology DFN-10, MSOP-10
0% LT3680 LT3680 product overviewLT3680 product overview Linear Technology DFN-10, MSOP-10
0% LT3980 LT3980 product overviewLT3980 product overview Linear Technology DFN-14, MSOP-16
0% TPS54240 TPS54240 product overviewTPS54240 product overview Texas Instruments SON-10, MSOP-10
0% TPS54240-Q1 TPS54240-Q1 product overviewTPS54240-Q1 product overview Texas Instruments SON-10, MSOP-10
0% TPS54361 TPS54361 product overviewTPS54361 product overview Texas Instruments WSON-10
0% TPS54361-Q1 TPS54361-Q1 product overviewTPS54361-Q1 product overview Texas Instruments WSON-10
10% LT3972 LT3972 product overviewLT3972 product overview Linear Technology DFN-10, MSOP-10
10% TPS54262-Q1 TPS54262-Q1 product overviewTPS54262-Q1 product overview Texas Instruments HTSSOP-20
10% TPS54362-Q1 TPS54362-Q1 product overviewTPS54362-Q1 product overview Texas Instruments HTSSOP-20
25% TPS54140A TPS54140A product overviewTPS54140A product overview Texas Instruments SON-10, MSOP-10
50% LT3682 LT3682 product overviewLT3682 product overview Linear Technology DFN-12
50% LT3695 LT3695 product overviewLT3695 product overview Linear Technology MSOP-16
50% LT3971 LT3971 product overviewLT3971 product overview Linear Technology DFN-10, MSOP-10
50% LT3971A LT3971A product overviewLT3971A product overview Linear Technology MSOP-8
50% LT3991 LT3991 product overviewLT3991 product overview Linear Technology DFN-10, MSOP-10
50% TPS54162-Q1 TPS54162-Q1 product overviewTPS54162-Q1 product overview Texas Instruments HTSSOP-20
50% TPS57160-Q1 TPS57160-Q1 product overviewTPS57160-Q1 product overview Texas Instruments SON-10, MSOP-10

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3685.

V-IN max. 36 V, I-OUT 2 A, V-OUT min. 0.79 V, Frequency typ. 2400 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74402500047 0.5 3.3 4.7 19.00 2.8 x 2.8 x 3
744040240068 0.7 2.5 3.5 35.00 2.5 x 2 x 1.2
744040320047 0.5 3.0 2.8 18.00 3 x 3 x 1.5
744040410047 0.5 3.3 4.3 28.00 4 x 4 x 1.2
74404200056 0.6 3.1 3.0 19.00 4.8 x 4.8 x 2
74406800056 0.6 3.4 4.0 22.00 8 x 8 x 1.2
744383210047 0.5 2.2 3.7 76.00 2.5 x 2 x 0.6
744383220047 0.5 2.3 4.4 70.00 2.5 x 2 x 0.8
744383230068 0.7 3.1 4.7 46.00 2.5 x 2 x 1
744383430068 0.7 2.0 4.7 65.00 2.5 x 1.6 x 0.6
74479275147 0.5 2.6 3.3 38.00 2 x 1.25 x 1
74479276147 0.5 2.9 4.2 34.00 2 x 1.6 x 1
74479276147C 0.5 2.7 4.5 33.00 2 x 1.25 x 1
74479276168 0.7 2.5 3.4 45.00 2 x 1.6 x 1
74479298147 0.5 3.0 4.5 28.00 3.2 x 2.5 x 1
74479976147 0.5 2.7 2.9 24.00 2 x 1.6 x 0.5
74479976147A 0.5 3.0 3.4 20.00 2 x 1.6 x 0.5
74479977147 0.5 2.2 2.4 55.00 2 x 1.6 x 0.9
784383210047 0.5 2.2 3.7 76.00 2.5 x 2 x 0.6
784383220047 0.5 2.3 4.4 70.00 2.5 x 2 x 0.8
784383230068 0.7 3.1 4.7 46.00 2.5 x 2 x 1
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