LT3690 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3690 is a 36.00 V sync Buck Converter from with 4.00 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 3.30 µH, a typical external component count of 10 and achieves a peak efficiency of 92 %. Further LT3690 characteristics are a adjustable 1500 kHz switching frequency and 1 available package option(s): QFN-26 .

For the LT3690 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. 3.90 V
V-IN max. 36.00 V
I-OUT? 4.00 A
V-OUT min. 0.80 V
V-OUT max. 20.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 1500 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 170 kHz
Frequency adj./ ext.clock max 1500 kHz
Softstart yes
Softstart adjustable yes
Tracking yes
PG/Power OK yes
Quiescent current max. 150 µA
Operating min.
Operating max.
Junction min. -55 °C
Junction max. 155 °C
thermal shutdown typ.
Inductor size typ. 3.30 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 92 %
Component count min. 10
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN QFN-26
SO/SOIC
SOP
DIP
TO
DDPAK

LT3690 Datasheet

Link to the most up-to-date LT3690 datasheet and the product page for EVM, tools and support information.

LT3690

LT3690 Sample stock and distributor price breaks

LT3690 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 3

Digi-Key (8)

ProductStockPriceBuy
LT3690EUFE#PBF942
110.79 USD
257.21 USD
1006.13 USD
Buy Now
LT3690IUFE#PBF336
111.87 USD
257.95 USD
1006.75 USD
Buy Now
LT3690HUFE#PBF385
112.40 USD
258.30 USD
1007.06 USD
Buy Now
LT3690EUFE#TRPBF0
25006.23 USD
Buy Now
LT3690EUFE#TRPBF1195
112.23 USD
2510.92 USD
1007.48 USD
2506.86 USD
Buy Now
LT3690EUFE#TRPBF1195
112.23 USD
2510.92 USD
1007.48 USD
2506.86 USD
Buy Now
LT3690IUFE#TRPBF0
25006.85 USD
Buy Now
LT3690IUFE#TRPBF1839
113.43 USD
2511.99 USD
1008.23 USD
2507.54 USD
Buy Now
LT3690IUFE#TRPBF1839
113.43 USD
2511.99 USD
1008.23 USD
2507.54 USD
Buy Now
LT3690MPUFE#PBF40
125.63 USD
2521.42 USD
10018.21 USD
Buy Now
LT3690HUFE#TRPBF0
25007.16 USD
Buy Now
LT3690MPUFE#TRPBF0
250018.31 USD
Buy Now

Mouser Electronics (2)

ProductStockPriceBuy
LT3690IUFE#PBF244
112.19 USD
1011.16 USD
258.15 USD
1006.93 USD
Buy Now
LT3690EUFE#PBF117 On Order
111.08 USD
1010.16 USD
257.39 USD
1006.29 USD
Buy Now
LT3690HUFE#PBFNone
1227.24 USD
Buy Now
LT3690EUFE#TRPBFNone
25006.39 USD
Buy Now
LT3690IUFE#TRPBFNone
25007.03 USD
Buy Now
LT3690HUFE#TRPBFNone
25007.34 USD
Buy Now
LT3690MPUFE#PBFNone
6121.95 USD
12218.66 USD
Buy Now
LT3690MPUFE#TRPBFNone
250018.76 USD
Buy Now

RS Components (2)

ProductStockPriceBuy
LT3690EUFE#PBF224Buy Now
LT3690IUFE#PBF75Buy Now

Available Distributors without stock: 1

Rutronik (0)

ProductStockPriceBuy
nnBuy Now

Available Distributors with stock: 4

Arrow Electronics

ProductStockPriceBuy
LT3690EUFE#TRPBF 1102
1006.11 $
Buy Now
LT3690MPUFE#PBF 106
121.00 $
10017.85 $
Buy Now
LT3690HUFE#PBF 91
18.14 $
1006.92 $
Buy Now
LT3690EUFE#TRPBF 0
1006.11 $
Buy Now
LT3690MPUFE#TRPBF 0
10017.95 $
Buy Now
LT3690HUFE#TRPBF 0
1007.02 $
Buy Now
LT3690EUFE#PBF 0
17.07 $
1006.01 $
Buy Now
LT3690IUFE#TRPBF 0
1006.72 $
Buy Now
LT3690IUFE#PBF 0
17.79 $
1006.62 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3690IUFE#TRPBF 1839
2506.44 €
1007.02 €
2510.24 €
111.47 €
Buy Now
LT3690IUFE#TRPBF 1839
2506.44 €
1007.02 €
2510.24 €
111.47 €
Buy Now
LT3690EUFE#TRPBF 1195
2505.85 €
1006.39 €
259.32 €
110.44 €
Buy Now
LT3690EUFE#TRPBF 1195
2505.85 €
1006.39 €
259.32 €
110.44 €
Buy Now
LT3690EUFE#PBF 942
1005.23 €
256.16 €
19.21 €
Buy Now
LT3690HUFE#PBF 385
1006.03 €
257.09 €
110.59 €
Buy Now
LT3690IUFE#PBF 336
1005.77 €
256.78 €
110.13 €
Buy Now
LT3690MPUFE#PBF 40
10015.55 €
2518.29 €
121.88 €
Buy Now
LT3690EUFE#TRPBF 0
25005.32 €
Buy Now
LT3690IUFE#TRPBF 0
25005.85 €
Buy Now
LT3690HUFE#TRPBF 0
25006.11 €
Buy Now
LT3690MPUFE#TRPBF 0
250015.63 €
Buy Now
show stock=0hide stock=0

Mouser Electronics

ProductStockPriceBuy
LT3690IUFE#PBF 244
111.89 $
1010.89 $
257.95 $
1006.75 $
Buy Now
LT3690EUFE#PBF 0
110.81 $
109.91 $
257.21 $
1006.13 $
Buy Now
LT3690HUFE#PBF 0
1227.06 $
Buy Now
LT3690EUFE#TRPBF 0
25006.23 $
Buy Now
LT3690IUFE#TRPBF 0
25006.85 $
Buy Now
LT3690HUFE#TRPBF 0
25007.16 $
Buy Now
LT3690MPUFE#PBF 0
6121.42 $
12218.21 $
Buy Now
LT3690MPUFE#TRPBF 0
250018.31 $
Buy Now
show stock=0hide stock=0

Quest Components

ProductStockPriceBuy
LT3690IUFE#PBF 45
1418.50 $
520.00 $
122.50 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3690. Optional, compare LT3690 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
25% LM43603 LM43603 product overviewLM43603 product overview Texas Instruments HTSSOP-16
25% LM43603-Q1 LM43603-Q1 product overviewLM43603-Q1 product overview Texas Instruments HTSSOP-16
50% LT8610 LT8610 product overviewLT8610 product overview Linear Technology MSOP-16
50% LT8611 LT8611 product overviewLT8611 product overview Linear Technology QFN-24
50% LTC3626 LTC3626 product overviewLTC3626 product overview Linear Technology QFN-20
50% LM43602 LM43602 product overviewLM43602 product overview Texas Instruments HTSSOP-16
50% LM43602-Q1 LM43602-Q1 product overviewLM43602-Q1 product overview Texas Instruments HTSSOP-16
50% LM46002 LM46002 product overviewLM46002 product overview Texas Instruments HTSSOP-16
50% LM46002-Q1 LM46002-Q1 product overviewLM46002-Q1 product overview Texas Instruments HTSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3690.

V-IN max. 36 V, I-OUT 4 A, V-OUT min. 0.8 V, Frequency typ. 1500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744040420033 0.3 4.5 7.6 13.00 4 x 4 x 1.8
744040520047 0.5 4.9 8.0 13.90 5 x 5 x 2
74404300033 0.3 4.0 6.0 8.00 4.8 x 4.8 x 3
74406900052 0.5 4.3 5.8 15.00 8 x 8 x 1.5
74407000047 0.5 7.8 6.5 5.80 8 x 8 x 2
744089420039 0.4 4.2 10.3 15.00 4.8 x 4.8 x 3.1
744089420056 0.6 4.1 8.3 15.60 4.8 x 4.8 x 3.1
744089430039 0.4 4.2 9.3 13.50 4.8 x 4.8 x 4.1
744373210047 0.5 5.4 9.0 18.00 4.45 x 4.06 x 1.2
744373240056 0.6 6.0 10.5 13.50 4.45 x 4.06 x 2
744383340033 0.3 4.8 11.1 19.00 3 x 3 x 1.2
744383340047 0.5 4.0 9.4 22.00 3 x 3 x 1.2
744383350047 0.5 4.6 5.8 20.00 3 x 3 x 1.5
744383360033 0.3 5.5 8.3 14.00 3 x 3 x 2
744383360047 0.5 4.8 8.0 18.00 3 x 3 x 2
744383560056 0.6 8.5 10.8 7.00 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
784383340033 0.3 4.8 11.1 19.00 3 x 3 x 1.2
784383340047 0.5 4.0 9.4 22.00 3 x 3 x 1.2
784383350047 0.5 4.6 5.8 20.00 3 x 3 x 1.5
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