LT3973-3.3 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3973-3.3 is a 42.00 V sync Buck Converter from with 0.75 A output current. The maximum 42.00 V input voltage can be regulated down into a 3.30 V to 3.30 V output voltage.

It requires are a typical inductor size of 15.00 µH, a typical external component count of 6 and achieves a peak efficiency of 88 %. Further LT3973-3.3 characteristics are a adjustable 800 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3973-3.3 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. 4.20 V
V-IN max. 42.00 V
I-OUT? 0.75 A
V-OUT min. 3.30 V
V-OUT max. 3.30 V
V-OUT 3.300 V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 800 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min. 195 kHz
Frequency adj./ ext.clock max 2150 kHz
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK yes
Quiescent current max. 6 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 15.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 88 %
Component count min. 6
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-10
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3973-3.3 Datasheet

Link to the most up-to-date LT3973-3.3 datasheet and the product page for EVM, tools and support information.

LT3973-3.3

LT3973-3.3 Sample stock and distributor price breaks

LT3973-3.3 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 6

ARROW-NAC (8)

ProductStockPriceBuy
LT3973IMSE-3.3#PBF299
14.49 USD
1003.81 USD
Buy Now
LT3973EDD-5#PBF215
13.93 USD
1003.34 USD
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LT3973EDD-5#PBF128
13.93 USD
1003.34 USD
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LT3973EMSE#PBF288
14.07 USD
1003.46 USD
Buy Now
LT3973EDD#TRPBF10000
13.39 USD
Buy Now
LT3973EDD#PBF723
13.93 USD
1003.34 USD
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LT3973IDD-5#PBF156
14.33 USD
1003.68 USD
Buy Now
LT3973IMSE-5#PBF469
14.49 USD
1003.81 USD
Buy Now

Chip-One-Stop (14)

ProductStockPriceBuy
LT3973EDD-3.3#PBF484
13.89 USD
103.23 USD
2003.12 USD
Buy Now
LT3973EDD-5#PBF112
15.29 USD
503.53 USD
1003.35 USD
Buy Now
LT3973EDD-5#PBF128
14.04 USD
103.44 USD
Buy Now
LT3973EDD#PBF728
16.38 USD
105.37 USD
255.31 USD
505.06 USD
1004.94 USD
2004.71 USD
Buy Now
LT3973EMSE-3.3#PBF550
14.07 USD
103.46 USD
2003.34 USD
5003.07 USD
Buy Now
LT3973EMSE-5#PBF970
16.72 USD
105.66 USD
255.59 USD
505.33 USD
1005.21 USD
2004.97 USD
Buy Now
LT3973EMSE#PBF834
16.72 USD
105.66 USD
255.59 USD
505.33 USD
1005.21 USD
2004.97 USD
Buy Now
LT3973EMSE#PBF834
16.72 USD
105.66 USD
255.59 USD
505.33 USD
1005.21 USD
2004.97 USD
Buy Now
LT3973EMSE#TRPBF2500
25003.76 USD
Buy Now
LT3973IDD-3.3#PBF970
16.61 USD
105.56 USD
255.50 USD
505.25 USD
1005.12 USD
2004.88 USD
Buy Now
LT3973IDD-5#PBF189
16.85 USD
105.76 USD
255.70 USD
505.44 USD
1005.31 USD
Buy Now
LT3973IMSE-3.3#PBF324
17.27 USD
56.21 USD
106.06 USD
505.72 USD
1005.39 USD
2005.27 USD
Buy Now
LT3973IMSE-5#PBF734
14.44 USD
254.26 USD
503.90 USD
1003.60 USD
2003.46 USD
5003.22 USD
Buy Now
LT3973IMSE#PBF5
17.27 USD
56.21 USD
Buy Now

DIGI-KEY (20)

ProductStockPriceBuy
LT3973EDD#PBF1844
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3973EDD-5#PBF389
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3973EMSE#PBF1285
16.08 USD
254.07 USD
1003.46 USD
Buy Now
LT3973EMSE-5#PBF916
16.08 USD
254.07 USD
1003.46 USD
Buy Now
LT3973EMSE-3.3#PBF713
16.08 USD
254.07 USD
1003.46 USD
Buy Now
LT3973IMSE-5#PBF445
16.68 USD
254.49 USD
1003.81 USD
Buy Now
DC2026C37
175.38 USD
Buy Now
LT3973EDD-3.3#PBF2366
15.88 USD
253.93 USD
1003.34 USD
Buy Now
LT3973IDD#PBF532
16.46 USD
254.33 USD
1003.68 USD
Buy Now
LT3973IDD-3.3#PBF519
16.46 USD
254.33 USD
1003.68 USD
Buy Now
LT3973IDD-5#PBF216
16.46 USD
254.33 USD
1003.68 USD
Buy Now
LT3973IMSE#PBF355
16.68 USD
254.49 USD
1003.81 USD
Buy Now
LT3973IMSE-3.3#PBF184
16.68 USD
254.49 USD
1003.81 USD
Buy Now
LT3973HDD-3.3#PBF216
17.21 USD
254.83 USD
1004.10 USD
Buy Now
LT3973HDD-5#PBF202
17.21 USD
254.83 USD
1004.10 USD
Buy Now
LT3973HMSE-3.3#PBF173
17.44 USD
254.99 USD
1004.24 USD
Buy Now
DC2026C-KIT4
1125.63 USD
Buy Now
DC1730A4
1100.50 USD
Buy Now
LT3973HMSE-5#PBF33
17.44 USD
254.99 USD
1004.24 USD
Buy Now
LT3973HMSE#PBF15
17.44 USD
254.99 USD
1004.24 USD
Buy Now
LT3973EDD#TRPBF0
25003.44 USD
Buy Now
LT3973EDD-5#TRPBF0
25003.44 USD
Buy Now
LT3973EDD-3.3#TRPBF0
25003.44 USD
Buy Now
LT3973EMSE#TRPBF0
25003.56 USD
Buy Now
LT3973EMSE-3.3#TRPBF0
25003.56 USD
Buy Now

Element14 (7)

ProductStockPriceBuy
LT3973EDD-3.3#PBF20
19.40 USD
256.28 USD
1005.34 USD
Buy Now
LT3973EDD-5#PBF36
19.40 USD
256.28 USD
1005.34 USD
Buy Now
LT3973EMSE-3.3#PBF230
19.72 USD
256.51 USD
1005.53 USD
Buy Now
LT3973EMSE-5#PBF216
19.72 USD
256.51 USD
1005.53 USD
Buy Now
LT3973EMSE#PBF391
19.72 USD
256.51 USD
1005.53 USD
Buy Now
LT3973IDD-3.3#PBF42
110.33 USD
256.92 USD
1005.88 USD
Buy Now
LT3973IDD-5#PBF234
110.33 USD
256.92 USD
1005.88 USD
Buy Now
LT3973IMSE-3.3#PBF0
110.68 USD
257.18 USD
1006.09 USD
Buy Now

FARNELL-ELEMENT14 (7)

ProductStockPriceBuy
LT3973EDD-3.3#PBF20Buy Now
LT3973EDD-5#PBF36Buy Now
LT3973EMSE-3.3#PBF310Buy Now
LT3973EMSE-5#PBF296Buy Now
LT3973EMSE#PBF747Buy Now
LT3973IDD-3.3#PBF42Buy Now
LT3973IDD-5#PBF234Buy Now

RS-COMPONENTS (1)

ProductStockPriceBuy
LT3973EMSE#PBF113Buy Now

Available Distributors without stock: 1

NEWARK (0)

ProductStockPriceBuy
LT3973EDD-3.3#PBF0
15.88 USD
253.95 USD
1003.34 USD
Buy Now
LT3973EDD#PBF0
15.88 USD
253.95 USD
1003.34 USD
Buy Now
LT3973EMSE#PBF0
16.09 USD
254.09 USD
1003.46 USD
Buy Now
LT3973EMSE#TRPBF0
15.91 USD
25004.24 USD
Buy Now
LT3973IDD-3.3#PBF0
16.48 USD
254.35 USD
1003.68 USD
Buy Now
LT3973IDD#PBF0
16.48 USD
254.35 USD
1003.68 USD
Buy Now
LT3973IMSE-5#PBF0
16.71 USD
254.50 USD
1003.81 USD
Buy Now
LT3973IMSE#TRPBF0
16.51 USD
25004.67 USD
Buy Now

Available Distributors with stock: 0

no online Distributor with LT3973 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3973-3.3. Optional, compare LT3973-3.3 side-by-side with other Buck Converter via the Comparison function.

no alternatives found

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3973-3.3.

V-IN max. 42 V, I-OUT 0.75 A, V-OUT min. 3.3 V, Frequency typ. 800 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025100 10.0 1.0 1.1 170.00 2.8 x 2.8 x 3
74404032100 10.0 0.8 0.9 230.00 3 x 3 x 1.5
74404041100 10.0 1.3 1.0 168.00 4 x 4 x 1.2
74404042100 10.0 1.2 1.5 150.00 4 x 4 x 1.8
74404042150 15.0 0.9 1.2 210.00 4 x 4 x 1.8
744042100 10.0 1.3 1.0 120.00 4.8 x 4.8 x 2
744042120 12.0 1.2 1.0 150.00 4.8 x 4.8 x 2
744043100 10.0 1.2 1.0 95.00 4.8 x 4.8 x 3
744043120 12.0 1.1 1.0 100.00 4.8 x 4.8 x 3
744045100 10.0 1.0 1.5 240.00 4.5 x 3.2 x 2.9
744045120 12.0 0.8 1.4 336.00 4.5 x 3.2 x 2.9
744052100 10.0 1.1 1.3 105.00 5.8 x 5.8 x 2
744052120 12.0 1.0 1.2 130.00 5.8 x 5.8 x 2
744052150 15.0 1.0 1.1 175.00 5.8 x 5.8 x 2
744053100 10.0 1.5 1.4 60.00 5.8 x 5.8 x 3
744053120 12.0 1.5 1.3 70.00 5.8 x 5.8 x 3
744053150 15.0 1.4 1.2 80.00 5.8 x 5.8 x 3
744062100 10.0 1.6 1.4 53.00 6.8 x 6.8 x 2.5
744062120 12.0 1.4 1.3 70.00 6.8 x 6.8 x 2.5
744062150 15.0 1.3 1.1 80.00 6.8 x 6.8 x 2.5
7440680100 10.0 1.2 1.0 177.00 8 x 8 x 1.2
7440680120 12.0 1.2 1.0 195.00 8 x 8 x 1.2
7440690100 10.0 1.6 1.3 112.00 8 x 8 x 1.5
7440690120 12.0 1.4 1.2 148.00 8 x 8 x 1.5
7440690150 15.0 1.3 1.1 179.00 8 x 8 x 1.5
7440700100 10.0 2.0 1.6 78.00 8 x 8 x 2
7440700150 15.0 1.7 1.3 117.00 8 x 8 x 2
74408941100 10.0 0.9 1.6 248.00 4.8 x 4.8 x 2.1
74408941150 15.0 0.8 1.4 430.00 4.8 x 4.8 x 2.1
74408942150 15.0 1.1 1.6 207.00 4.8 x 4.8 x 3.1
74408943150 15.0 1.4 1.7 118.00 4.8 x 4.8 x 4.1
74477310 10.0 1.5 1.7 118.00 4 x 4.5 x 3.5
744773112 12.0 1.3 1.6 156.00 4 x 4.5 x 3.5
744773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
744778115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.4
744778510 10.0 1.9 1.6 100.00 5.9 x 6.2 x 3.3
7447785115 15.0 1.6 1.4 165.00 5.9 x 6.2 x 3.3
744778610 10.0 2.1 1.8 74.00 5.9 x 6.2 x 5.1
7447789115 15.0 1.5 1.8 100.00 7.3 x 7.3 x 3.5
78477310 10.0 1.5 1.7 118.00 4 x 4.5 x 3.5
784773112 12.0 1.3 1.6 156.00 4 x 4.5 x 3.5
784773115 15.0 1.2 1.5 204.00 4 x 4.5 x 3.5
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