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: 7

Chip-One-Stop (5)

ProductStockPriceBuy
LT3685EDD#PBF1493
17.18 USD
56.13 USD
105.99 USD
505.64 USD
1005.32 USD
2005.20 USD
Buy Now
LT3685EMSE#PBF73
15.12 USD
103.61 USD
503.49 USD
Buy Now
LT3685EMSE#PBF557
17.41 USD
56.33 USD
106.18 USD
505.83 USD
1005.49 USD
2005.37 USD
Buy Now
LT3685IDD#PBF600
18.47 USD
57.23 USD
107.06 USD
506.66 USD
1006.27 USD
2006.13 USD
Buy Now
LT3685IMSE#PBF1044
18.22 USD
57.02 USD
106.86 USD
506.46 USD
1006.09 USD
2005.95 USD
Buy Now

DIGI-KEY (3)

ProductStockPriceBuy
LT3685EDD#PBF694
16.13 USD
254.36 USD
1003.59 USD
Buy Now
LT3685EMSE#PBF0
16.33 USD
254.50 USD
1003.71 USD
Buy Now
LT3685IMSE#PBF632
17.59 USD
255.40 USD
1004.45 USD
Buy Now
LT3685IDD#PBF16
17.36 USD
255.23 USD
1004.31 USD
Buy Now
LT3685EDD#TRPBF0
25003.69 USD
Buy Now
LT3685EMSE#TRPBF0
25003.81 USD
Buy Now
LT3685IDD#TRPBF0
25004.41 USD
Buy Now
LT3685IMSE#TRPBF0
25004.55 USD
Buy Now
DC1212A-B0
10.00 USD
Buy Now

Element14 (2)

ProductStockPriceBuy
LT3685EMSE#PBF1349
110.05 USD
257.14 USD
1005.89 USD
Buy Now
LT3685IMSE#PBF46
112.05 USD
258.57 USD
1007.06 USD
Buy Now

FARNELL-ELEMENT14 (2)

ProductStockPriceBuy
LT3685EMSE#PBF1349Buy Now
LT3685IMSE#PBF46Buy Now

NEWARK (2)

ProductStockPriceBuy
LT3685EDD#PBF786
16.14 USD
254.35 USD
1003.59 USD
Buy Now
LT3685EDD#TRPBF0
16.33 USD
25004.54 USD
Buy Now
LT3685EMSE#PBF0
16.35 USD
254.49 USD
1003.71 USD
Buy Now
LT3685IDD#PBF0
17.37 USD
255.00 USD
1004.31 USD
Buy Now
LT3685IDD#TRPBF0
17.59 USD
25005.44 USD
Buy Now
LT3685IMSE#PBF121
17.61 USD
255.39 USD
1004.45 USD
Buy Now
LT3685IMSE#TRPBF0
17.83 USD
25005.62 USD
Buy Now

RS-COMPONENTS (6)

ProductStockPriceBuy
LT3685EDD#PBF105Buy Now
LT3685EDD#PBF121Buy Now
LT3685EMSE#PBF17Buy Now
LT3685EMSE#PBF38Buy Now
LT3685EMSE#PBF200Buy Now
LT3685IMSE#PBF17Buy Now

Reichelt Elektronik (1)

ProductStockPriceBuy
LT3685EMSE#PBF1Buy Now

Available Distributors with stock: 0

no online Distributor with LT3685 stock available

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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