LTC3646 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LTC3646 is a 40.00 V sync Buck Converter from with 1.00 A output current. The maximum 40.00 V input voltage can be regulated down into a 2.00 V to 30.00 V output voltage.

It requires are a typical inductor size of 3.30 µH, a typical external component count of 7 and achieves a peak efficiency of 95 %. Further LTC3646 characteristics are a adjustable 2250 kHz switching frequency and 2 available package option(s): MSOP-16 DFN-14 .

For the LTC3646 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. 4.00 V
V-IN max. 40.00 V
I-OUT? 1.00 A
V-OUT min. 2.00 V
V-OUT max. 30.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 2250 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 200 kHz
Frequency adj./ ext.clock max 3000 kHz
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. 875 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ. 175 °C
Inductor size typ. 3.30 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 95 %
Component count min. 7
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN DFN-14
SO/SOIC
SOP
DIP
TO
DDPAK

LTC3646 Datasheet

Link to the most up-to-date LTC3646 datasheet and the product page for EVM, tools and support information.

LTC3646

LTC3646 Sample stock and distributor price breaks

LTC3646 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 0

no online Distributor with LTC3646 stock available

Available Distributors with stock: 8

Digi-Key

ProductStockPriceBuy
LTC3646IDE#PBF 1559
5003.46 €
2503.54 €
1003.72 €
254.50 €
16.78 €
Buy Now
LTC3646HDE#PBF 1032
5003.73 €
2503.82 €
1004.02 €
254.86 €
17.32 €
Buy Now
LTC3646EDE-1#PBF 722
5003.14 €
2503.22 €
1003.38 €
254.09 €
16.16 €
Buy Now
LTC3646EDE#PBF 633
5003.14 €
2503.22 €
1003.38 €
254.09 €
16.16 €
Buy Now
LTC3646IMSE#PBF 581
5003.46 €
2503.54 €
1003.72 €
254.50 €
16.78 €
Buy Now
LTC3646IDE-1#PBF 417
5003.46 €
2503.54 €
1003.72 €
254.50 €
16.78 €
Buy Now
LTC3646HDE-1#PBF 331
5003.73 €
2503.82 €
1004.02 €
254.86 €
17.32 €
Buy Now
LTC3646EMSE-1#PBF 222
5003.14 €
2503.22 €
1003.38 €
254.09 €
16.16 €
Buy Now
LTC3646HMSE#PBF 135
5003.73 €
2503.82 €
1004.02 €
254.86 €
17.32 €
Buy Now
LTC3646IMSE-1#PBF 111
5003.46 €
2503.54 €
1003.72 €
254.50 €
16.78 €
Buy Now
LTC3646EMSE#PBF 11
5003.14 €
2503.22 €
1003.38 €
254.09 €
16.16 €
Buy Now
DC1820A-A 3
1133.82 €
Buy Now
DC1731A-A 3
1133.82 €
Buy Now
DC1731A-B 3
1133.82 €
Buy Now
DC1820A-B 2
1133.82 €
Buy Now

Mouser Electronics

ProductStockPriceBuy
LTC3646IDE#PBF 1249
17.59 $
255.04 $
1004.16 $
2503.95 $
5003.87 $
10003.72 $
Buy Now
LTC3646EDE#PBF 167
16.90 $
254.58 $
1003.78 $
2503.60 $
5003.51 $
10003.38 $
Buy Now
LTC3646EDE-1#PBF 157
16.90 $
254.58 $
1003.78 $
2503.60 $
5003.51 $
10003.38 $
Buy Now
LTC3646IDE-1#PBF 306
17.59 $
255.04 $
1004.16 $
2503.95 $
5003.87 $
10003.72 $
Buy Now
LTC3646HDE-1#PBF 304
18.20 $
255.44 $
1004.50 $
2504.27 $
5004.18 $
10004.02 $
Buy Now
LTC3646HDE#PBF 182
18.20 $
255.44 $
1004.50 $
2504.27 $
5004.18 $
10004.02 $
Buy Now
LTC3646EMSE#PBF 0
16.90 $
254.58 $
1003.78 $
2503.60 $
5003.51 $
10003.38 $
Buy Now
LTC3646HMSE#PBF 0
18.20 $
255.44 $
1004.50 $
2504.27 $
5004.18 $
10004.02 $
Buy Now
LTC3646HMSE-1#PBF 0
18.20 $
255.44 $
1004.50 $
2504.27 $
5004.18 $
10004.02 $
Buy Now
LTC3646EMSE-1#PBF 0
1853.78 $
2593.60 $
5183.51 $
10363.38 $
Buy Now
LTC3646IMSE-1#PBF 0
1854.16 $
2593.95 $
5183.87 $
10363.72 $
Buy Now
LTC3646IMSE#PBF 0
1854.16 $
2593.95 $
5183.87 $
10363.72 $
Buy Now
LTC3646EDE#TRPBF 0
25003.44 $
Buy Now
LTC3646EMSE-1#TRPBF 0
25003.44 $
Buy Now
LTC3646EDE-1#TRPBF 0
25003.44 $
Buy Now
show stock=0hide stock=0

Bristol Electronics

ProductStockPriceBuy
LTC3646EDE#PBF 41 Buy Now

Quest Components

ProductStockPriceBuy
LTC3646EDE#PBF 1
25.20 $
17.80 $
Buy Now
LTC3646IDE-1#PBF 1
28.19 $
19.83 $
Buy Now

TME Electronic Components

ProductStockPriceBuy
LTC3646IMSE#PBF 209
373.54 $
103.94 $
34.46 $
14.96 $
Buy Now

Chip1Stop

ProductStockPriceBuy
LTC3646IDE-1#PBF 71
504.16 $
14.21 $
Buy Now

element14 Asia-Pacific

ProductStockPriceBuy
LTC3646HDE-1#PBF 1777
5006.27 SGD
2506.41 SGD
1006.75 SGD
258.16 SGD
112.28 SGD
Buy Now
LTC3646IDE-1#PBF 0
5005.80 SGD
2505.93 SGD
1006.25 SGD
257.55 SGD
111.37 SGD
Buy Now
LTC3646EMSE-1#PBF 0
5005.28 SGD
2505.40 SGD
1005.68 SGD
256.87 SGD
110.34 SGD
Buy Now
show stock=0hide stock=0

Farnell element14

ProductStockPriceBuy
LTC3646HDE-1#PBF 1777
12.61 GBP
Buy Now

Available Distributors without stock: 1

Richardson RFPD

ProductStockPriceBuy
LTC3646IDE-1#TRPBF 0
25004.08 $
50003.93 $
Buy Now
LTC3646HMSE#TRPBF 0
25004.41 $
50004.23 $
Buy Now
LTC3646EDE#TRPBF 0
25003.70 $
50003.56 $
Buy Now
LTC3646EMSE#TRPBF 0
25003.70 $
50003.56 $
Buy Now
LTC3646EMSE-1#TRPBF 0
25003.70 $
50003.56 $
Buy Now
LTC3646HDE-1#PBF 0
914.83 $
1004.56 $
5004.44 $
10004.32 $
50004.16 $
Buy Now
LTC3646HMSE-1#PBF 0
1484.56 $
5004.44 $
10004.32 $
50004.16 $
Buy Now
LTC3646HDE#PBF 0
914.83 $
1004.56 $
5004.44 $
10004.32 $
50004.16 $
Buy Now
LTC3646HMSE#PBF 0
1484.56 $
5004.44 $
10004.32 $
50004.16 $
Buy Now
LTC3646HDE-1#TRPBF 0
25004.41 $
50004.23 $
Buy Now
LTC3646IDE#PBF 0
1824.22 $
5004.11 $
10004.00 $
50003.85 $
Buy Now
LTC3646EDE#PBF 0
1823.84 $
5003.73 $
10003.64 $
50003.50 $
Buy Now
LTC3646HDE#TRPBF 0
25004.41 $
50004.23 $
Buy Now
LTC3646HMSE-1#TRPBF 0
25004.41 $
50004.23 $
Buy Now
LTC3646IMSE#PBF 0
1854.22 $
5004.11 $
10004.00 $
50003.85 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3646. Optional, compare LTC3646 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3646-1 LTC3646-1 product overviewLTC3646-1 product overview Linear Technology DFN-14, MSOP-16
0% LM46001 LM46001 product overviewLM46001 product overview Texas Instruments HTSSOP-16
0% LM46001-Q1 LM46001-Q1 product overviewLM46001-Q1 product overview Texas Instruments HTSSOP-16
0% LM46002 LM46002 product overviewLM46002 product overview Texas Instruments HTSSOP-16
0% LM46002-Q1 LM46002-Q1 product overviewLM46002-Q1 product overview Texas Instruments HTSSOP-16
10% ER3110 ER3110 product overviewER3110 product overview Altera DFN-12
10% ADP2442 ADP2442 product overviewADP2442 product overview Analog Devices LFCSP-12
10% LM43601 LM43601 product overviewLM43601 product overview Texas Instruments HTSSOP-16
10% LM43601-Q1 LM43601-Q1 product overviewLM43601-Q1 product overview Texas Instruments HTSSOP-16
50% ER3105 ER3105 product overviewER3105 product overview Altera DFN-12
50% LM43600 LM43600 product overviewLM43600 product overview Texas Instruments HTSSOP-16
50% LM43600-Q1 LM43600-Q1 product overviewLM43600-Q1 product overview Texas Instruments HTSSOP-16
50% LM46000 LM46000 product overviewLM46000 product overview Texas Instruments HTSSOP-16
50% LM46000-Q1 LM46000-Q1 product overviewLM46000-Q1 product overview Texas Instruments HTSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3646.

V-IN max. 40 V, I-OUT 1 A, V-OUT min. 2 V, Frequency typ. 2250 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025002 2.2 1.8 2.4 57.00 2.8 x 2.8 x 3
744031002 2.5 1.5 1.3 50.00 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
7440420018 1.8 2.4 2.4 40.00 4.8 x 4.8 x 2
7440420027 2.7 2.0 2.2 47.00 4.8 x 4.8 x 2
7440430018 1.8 2.7 2.5 20.00 4.8 x 4.8 x 3
7440430022 2.2 2.5 2.4 27.00 4.8 x 4.8 x 3
7440430027 2.7 2.4 2.0 25.00 4.8 x 4.8 x 3
744052003 3.0 2.2 2.4 40.00 5.8 x 5.8 x 2
744053003 3.0 2.8 2.5 20.00 5.8 x 5.8 x 3
7440680017 1.7 2.5 2.4 41.00 8 x 8 x 1.2
7440680027 2.7 2.2 1.9 52.00 8 x 8 x 1.2
74438322022 2.2 1.3 2.2 252.00 2.5 x 2 x 0.8
74438323022 2.2 1.3 2.5 147.00 2.5 x 2 x 1
74438343022 2.2 1.1 2.5 225.00 2.5 x 1.6 x 0.6
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
74479276222C 2.2 1.6 2.5 112.00 2 x 1.25 x 1
74479287222 2.2 1.5 2.5 132.00 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
78438322022 2.2 1.3 2.2 252.00 2.5 x 2 x 0.8
78438323022 2.2 1.3 2.5 147.00 2.5 x 2 x 1
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