LT3689 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3689 is a 36.00 V non-sync Buck Converter from with 0.70 A output current. The maximum 36.00 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 12.00 µH, a typical external component count of 11 and achieves a peak efficiency of 95 %. Further LT3689 characteristics are a adjustable 2000 kHz switching frequency and 2 available package option(s): MSOP-16 QFN-16 .

For the LT3689 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. 3.40 V
V-IN max. 36.00 V
I-OUT? 0.70 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. 2000 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 350 kHz
Frequency adj./ ext.clock max 2200 kHz
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 95 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ.
Inductor size typ. 12.00 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

LT3689 Datasheet

Link to the most up-to-date LT3689 datasheet and the product page for EVM, tools and support information.

LT3689

LT3689 Sample stock and distributor price breaks

LT3689 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 3

Chip One Stop (2)

ProductStockPriceBuy
LT3689EMSE-5#PBF230
14.85 USD
1004.62 USD
Buy Now
LT3689HMSE#PBF184
15.84 USD
1005.57 USD
Buy Now

Digi-Key (2)

ProductStockPriceBuy
LT3689EMSE-5#PBF123
17.07 USD
254.73 USD
1004.03 USD
Buy Now
LT3689HMSE#PBF35
18.41 USD
255.62 USD
1004.78 USD
Buy Now
LT3689EUD#PBF0
2423.97 USD
Buy Now
LT3689EUD-5#PBF0
2423.97 USD
Buy Now
LT3689EMSE#PBF0
1854.03 USD
Buy Now
LT3689EUD#TRPBF0
25004.07 USD
Buy Now
LT3689EUD-5#TRPBF0
25004.07 USD
Buy Now
LT3689EMSE#TRPBF0
25004.13 USD
Buy Now
LT3689EMSE-5#TRPBF0
25004.13 USD
Buy Now
LT3689IUD#PBF0
2424.41 USD
Buy Now
LT3689IUD-5#PBF0
2424.41 USD
Buy Now
LT3689IMSE#PBF0
1854.47 USD
Buy Now
LT3689IMSE-5#PBF0
1854.47 USD
Buy Now
LT3689IUD#TRPBF0
25004.51 USD
Buy Now
LT3689IUD-5#TRPBF0
25004.51 USD
Buy Now
LT3689IMSE#TRPBF0
25004.57 USD
Buy Now
LT3689IMSE-5#TRPBF0
25004.57 USD
Buy Now
LT3689HMSE-5#PBF0
1854.78 USD
Buy Now
LT3689HMSE#TRPBF0
25004.89 USD
Buy Now
LT3689HMSE-5#TRPBF0
25004.89 USD
Buy Now

Newark Electronics (1)

ProductStockPriceBuy
LT3689EMSE-5#PBF99
16.96 USD
254.67 USD
1003.95 USD
Buy Now

Available Distributors with stock: 5

Arrow Electronics

ProductStockPriceBuy
LT3689EMSE-5#PBF 230
14.64 $
1003.95 $
Buy Now
LT3689HMSE#PBF 184
15.51 $
1004.69 $
Buy Now
LT3689IMSE#TRPBF 0
1004.48 $
Buy Now
LT3689EUD#TRPBF 0
1003.99 $
Buy Now
LT3689EUD#TRPBF 0
1003.99 $
Buy Now
LT3689EUD#TRPBF 0
1003.99 $
Buy Now
LT3689IMSE#PBF 0
15.16 $
1004.38 $
Buy Now
LT3689EUD#PBF 0
14.57 $
1003.89 $
Buy Now
LT3689EMSE-5#TRPBF 0
1004.05 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3689EMSE-5#PBF 123
1003.24 €
253.81 €
15.69 €
Buy Now
LT3689HMSE#PBF 35
1003.85 €
254.52 €
16.77 €
Buy Now
LT3689EUD#PBF 0
2423.19 €
Buy Now
LT3689EUD-5#PBF 0
2423.19 €
Buy Now
LT3689EMSE#PBF 0
1853.24 €
Buy Now
LT3689EUD#TRPBF 0
25003.27 €
Buy Now
LT3689EUD-5#TRPBF 0
25003.27 €
Buy Now
LT3689EMSE#TRPBF 0
25003.32 €
Buy Now
LT3689EMSE-5#TRPBF 0
25003.32 €
Buy Now
LT3689IUD#PBF 0
2423.54 €
Buy Now
LT3689IUD-5#PBF 0
2423.54 €
Buy Now
LT3689IMSE#PBF 0
1853.59 €
Buy Now
LT3689IMSE-5#PBF 0
1853.59 €
Buy Now
LT3689IUD#TRPBF 0
25003.63 €
Buy Now
LT3689IUD-5#TRPBF 0
25003.63 €
Buy Now
show stock=0hide stock=0

Newark element14

ProductStockPriceBuy
LT3689EMSE-5#PBF 33
16.96 $
254.67 $
1003.95 $
Buy Now

Mouser Electronics

ProductStockPriceBuy
LT3689HMSE#PBF 37
18.42 $
107.72 $
255.62 $
1004.78 $
Buy Now
LT3689EMSE-5#PBF 0
17.09 $
106.49 $
254.73 $
1004.03 $
Buy Now
LT3689IMSE#PBF 0
17.88 $
107.22 $
255.26 $
1004.47 $
Buy Now
LT3689HMSE-5#PBF 0
18.42 $
107.72 $
255.62 $
1004.78 $
Buy Now
LT3689EMSE-5#TRPBF 0
18.07 $
107.49 $
257.20 $
1004.96 $
2504.54 $
Buy Now
LT3689EUD#TRPBF 0
17.96 $
107.39 $
257.10 $
1004.88 $
2504.48 $
Buy Now
LT3689IMSE#TRPBF 0
18.97 $
108.32 $
258.00 $
1005.48 $
2505.03 $
Buy Now
LT3689EUD#PBF 0
16.98 $
106.40 $
254.66 $
1003.97 $
Buy Now
LT3689EUD-5#PBF 0
16.98 $
106.40 $
254.66 $
1003.97 $
Buy Now
LT3689EMSE#PBF 0
17.09 $
106.49 $
254.73 $
1004.03 $
Buy Now
LT3689IUD#PBF 0
17.75 $
107.11 $
255.19 $
1004.41 $
Buy Now
LT3689IUD-5#PBF 0
17.75 $
107.11 $
255.19 $
1004.41 $
Buy Now
LT3689IMSE-5#PBF 0
17.88 $
107.22 $
255.26 $
1004.47 $
Buy Now
LT3689EUD-5#TRPBF 0
17.96 $
107.39 $
257.10 $
1004.88 $
2504.48 $
Buy Now
LT3689EMSE#TRPBF 0
18.07 $
107.49 $
257.20 $
1004.96 $
2504.54 $
Buy Now
show stock=0hide stock=0

Chip1Stop

ProductStockPriceBuy
LT3689EMSE-5#PBF 230
1004.62 $
14.85 $
Buy Now
LT3689HMSE#PBF 184
1005.57 $
15.84 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3689. Optional, compare LT3689 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3682 LT3682 product overviewLT3682 product overview Linear Technology DFN-12
0% LT3686A LT3686A product overviewLT3686A product overview Linear Technology DFN-10
0% MP2562 MP2562 product overviewMP2562 product overview MPS SOIC-8, QFN-10
0% MPQ4558 MPQ4558 product overviewMPQ4558 product overview MPS SOIC-8, QFN-10
0% TPS57160-Q1 TPS57160-Q1 product overviewTPS57160-Q1 product overview Texas Instruments SON-10, MSOP-10
10% TPS54162-Q1 TPS54162-Q1 product overviewTPS54162-Q1 product overview Texas Instruments HTSSOP-20
10% MP2454 MP2454 product overviewMP2454 product overview MPS QFN-10, MSOP-10
10% MPQ2454 MPQ2454 product overviewMPQ2454 product overview MPS QFN-10, MSOP-10
10% MPQ2454-AEC1 MPQ2454-AEC1 product overviewMPQ2454-AEC1 product overview MPS QFN-10, MSOP-10
25% TPS54040A TPS54040A product overviewTPS54040A product overview Texas Instruments SON-10, MSOP-10
25% TPS54040-Q1 TPS54040-Q1 product overviewTPS54040-Q1 product overview Texas Instruments SON-10, MSOP-10
25% TPS57060-Q1 TPS57060-Q1 product overviewTPS57060-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 LT3689.

V-IN max. 36 V, I-OUT 0.7 A, V-OUT min. 0.8 V, Frequency typ. 2000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744028002 2.2 1.3 1.0 125.00 2.8 x 2.8 x 1.2
744029002 2.2 1.5 1.2 88.00 2.8 x 2.8 x 1.5
744031001 1.5 1.8 1.6 40.00 3.8 x 3.8 x 1.8
74404024022 2.2 1.8 2.0 80.00 2.5 x 2 x 1.2
74404032022 2.2 1.8 1.7 50.00 3 x 3 x 1.5
74479275222 2.2 1.3 1.7 166.00 2 x 1.25 x 1
74479276222 2.2 1.4 1.8 135.00 2 x 1.6 x 1
74479787215A 1.5 1.9 1.1 70.00 2.5 x 2 x 1
74479888222 2.2 1.2 1.4 200.00 2.5 x 2 x 1
74479889222 2.2 1.3 1.7 250.00 2.5 x 2 x 1.2
74479976215 1.5 1.6 1.9 100.00 2 x 1.6 x 0.5
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