LT3686 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3686 is a 37.00 V non-sync Buck Converter from with 1.20 A output current. The maximum 37.00 V input voltage can be regulated down into a 0.80 V to 20.00 V output voltage.

It requires are a typical inductor size of 6.80 µH, a typical external component count of 9 and achieves a peak efficiency of 88 %. Further LT3686 characteristics are a adjustable 2500 kHz switching frequency and 1 available package option(s): DFN-10 .

For the LT3686 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. 37.00 V
I-OUT? 1.20 A
V-OUT min. 0.80 V
V-OUT max. 20.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 2500 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min. 300 kHz
Frequency adj./ ext.clock max 2500 kHz
Softstart yes
Softstart adjustable yes
Tracking yes
PG/Power OK no
Quiescent current max. 1300 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ.
Inductor size typ. 6.80 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 88 %
Component count min. 9
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3686 Datasheet

Link to the most up-to-date LT3686 datasheet and the product page for EVM, tools and support information.

LT3686

LT3686 Sample stock and distributor price breaks

LT3686 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 2

Digi-Key (7)

ProductStockPriceBuy
LT3686IDD#PBF833
16.05 USD
254.05 USD
1003.45 USD
Buy Now
LT3686AIDD#PBF632
16.05 USD
254.05 USD
1003.45 USD
Buy Now
LT3686EDD#PBF270
15.46 USD
253.64 USD
1003.10 USD
Buy Now
LT3686AEMSE#PBF335
15.66 USD
253.78 USD
1003.22 USD
Buy Now
LT3686AEDD#PBF424
15.46 USD
253.64 USD
1003.10 USD
Buy Now
LT3686HDD#PBF79
16.59 USD
254.42 USD
1003.75 USD
Buy Now
DC1323A2
1100.50 USD
Buy Now
LT3686EDD#TRPBF0
25003.20 USD
Buy Now
LT3686AEDD#TRPBF0
25003.20 USD
Buy Now
LT3686AEMSE#TRPBF0
25003.33 USD
Buy Now
LT3686IDD#TRPBF0
25003.55 USD
Buy Now
LT3686AIDD#TRPBF0
25003.55 USD
Buy Now
LT3686AIMSE#PBF0
2223.58 USD
Buy Now
LT3686AIMSE#TRPBF0
25003.68 USD
Buy Now
LT3686HDD#TRPBF0
25003.86 USD
Buy Now
LT3686AHMSE#PBF0
2223.89 USD
Buy Now
LT3686AHMSE#TRPBF0
25003.99 USD
Buy Now

Element14 (2)

ProductStockPriceBuy
LT3686HDD#PBF84
110.28 USD
256.89 USD
1005.86 USD
Buy Now
LT3686HDD#PBF84
110.28 USD
256.89 USD
1005.86 USD
Buy Now

Available Distributors without stock: 1

Farnell Element14 (0)

ProductStockPriceBuy
LT3686HDD#PBF0Buy Now
LT3686IDD#PBF0Buy Now

Available Distributors with stock: 5

Arrow Electronics

ProductStockPriceBuy
LT3686EDD#TRPBF 5000
1003.14 $
Buy Now
LT3686AEDD#PBF 288
13.57 $
1003.04 $
Buy Now
LT3686AEMSE#PBF 180
13.71 $
1003.16 $
Buy Now
LT3686EDD#PBF 94
13.57 $
1003.04 $
Buy Now
LT3686IDD#PBF 52
13.97 $
1003.38 $
Buy Now
LT3686AEMSE#PBF 0
13.71 $
1003.16 $
Buy Now
LT3686EDD#PBF 0
13.57 $
1003.04 $
Buy Now
LT3686EDD#TRPBF 0
1003.14 $
Buy Now
LT3686AIDD#PBF 0
13.97 $
1003.38 $
Buy Now
LT3686AIDD#PBF 0
13.97 $
1003.38 $
Buy Now
LT3686HDD#PBF 0
14.33 $
1003.68 $
Buy Now
LT3686IDD#TRPBF 0
1003.48 $
Buy Now
LT3686AIDD#TRPBF 0
1003.48 $
Buy Now
LT3686AEDD#TRPBF 0
1003.14 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3686IDD#PBF 833
1002.78 €
253.26 €
14.88 €
Buy Now
LT3686AIDD#PBF 632
1002.78 €
253.26 €
14.88 €
Buy Now
LT3686AEDD#PBF 424
1002.50 €
252.93 €
14.40 €
Buy Now
LT3686AEMSE#PBF 335
1002.60 €
253.05 €
14.56 €
Buy Now
LT3686EDD#PBF 270
1002.50 €
252.93 €
14.40 €
Buy Now
LT3686HDD#PBF 79
1003.03 €
253.56 €
15.31 €
Buy Now
DC1323A 2
180.99 €
Buy Now
LT3686EDD#TRPBF 0
25002.58 €
Buy Now
LT3686AEDD#TRPBF 0
25002.58 €
Buy Now
LT3686AEMSE#TRPBF 0
25002.68 €
Buy Now
LT3686IDD#TRPBF 0
25002.86 €
Buy Now
LT3686AIDD#TRPBF 0
25002.86 €
Buy Now
LT3686AIMSE#PBF 0
2222.89 €
Buy Now
LT3686AIMSE#TRPBF 0
25002.97 €
Buy Now
LT3686HDD#TRPBF 0
25003.11 €
Buy Now
show stock=0hide stock=0

Mouser Electronics

ProductStockPriceBuy
LT3686IDD#PBF 226
16.06 $
105.55 $
254.05 $
1003.45 $
Buy Now
LT3686AIDD#PBF 242
16.06 $
105.55 $
254.05 $
1003.45 $
Buy Now
LT3686EDD#PBF 121
15.47 $
105.01 $
253.64 $
1003.10 $
Buy Now
LT3686AEDD#PBF 0
2423.10 $
Buy Now
LT3686AHMSE#PBF 0
2223.89 $
Buy Now
LT3686AIDD#TRPBF 0
25003.55 $
Buy Now
LT3686IDD#TRPBF 0
25003.55 $
Buy Now
LT3686AIMSE#PBF 0
2223.58 $
Buy Now
LT3686AEMSE#PBF 0
2593.22 $
Buy Now
LT3686HDD#PBF 0
2423.75 $
Buy Now
LT3686AEDD#TRPBF 0
25003.20 $
Buy Now
LT3686EDD#TRPBF 0
25003.20 $
Buy Now
LT3686AEMSE#TRPBF 0
25003.33 $
Buy Now
LT3686AIMSE#TRPBF 0
25003.68 $
Buy Now
LT3686HDD#TRPBF 0
25003.86 $
Buy Now
show stock=0hide stock=0

element14 Asia-Pacific

ProductStockPriceBuy
LT3686HDD#PBF 84
18.22 $
255.51 $
1004.68 $
Buy Now

Farnell element14

ProductStockPriceBuy
LT3686HDD#PBF 84
15.49 GBP
253.17 GBP
1002.85 GBP
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3686. Optional, compare LT3686 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3686A LT3686A product overviewLT3686A product overview Linear Technology DFN-10
0% TPS54140A TPS54140A product overviewTPS54140A product overview Texas Instruments SON-10, MSOP-10
10% TPS54162-Q1 TPS54162-Q1 product overviewTPS54162-Q1 product overview Texas Instruments HTSSOP-20
10% TPS54262-Q1 TPS54262-Q1 product overviewTPS54262-Q1 product overview Texas Instruments HTSSOP-20
10% 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 LT3686.

V-IN max. 37 V, I-OUT 1.2 A, V-OUT min. 0.8 V, Frequency typ. 2500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74402800082 0.8 2.0 1.6 53.00 2.8 x 2.8 x 1.2
744028001 1.0 1.8 1.5 65.00 2.8 x 2.8 x 1.2
74402900082 0.8 2.4 1.8 36.00 2.8 x 2.8 x 1.5
744029001 1.0 2.2 1.6 45.00 2.8 x 2.8 x 1.5
7440300068 0.7 1.3 1.5 0.06 3.3 x 3.5 x 1.05
744031010 1.0 2.0 1.6 26.00 3.8 x 3.8 x 1.8
74404024010 1.0 2.2 2.6 37.00 2.5 x 2 x 1.2
74404032010 1.0 2.2 3.0 33.00 3 x 3 x 1.5
744042001 1.0 2.7 2.6 20.00 4.8 x 4.8 x 2
74438321010 1.0 1.3 2.5 163.00 2.5 x 2 x 0.6
74479262210 1.0 1.2 1.7 170.00 1.6 x 0.8 x 0.8
74479275210 1.0 1.8 2.1 69.00 2 x 1.25 x 1
74479276210 1.0 2.0 2.5 65.00 2 x 1.6 x 1
74479876168 0.7 1.8 1.7 60.00 2 x 1.6 x 1
74479876210 1.0 1.5 1.5 70.00 2 x 1.6 x 1
74479889210 1.0 2.0 2.0 85.00 2.5 x 2 x 1.2
74479899210 1.0 2.3 2.5 50.00 3.2 x 2.6 x 1.2
74479976210 1.0 1.8 2.4 75.00 2 x 1.6 x 0.5
74479977182 0.8 2.0 2.0 90.00 2 x 1.6 x 0.9
78438321010 1.0 1.3 2.5 163.00 2.5 x 2 x 0.6
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