LT3972 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3972 is a 33.00 V non-sync Buck Converter from with 3.50 A output current. The maximum 33.00 V input voltage can be regulated down into a 0.79 V to 30.00 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 11 and achieves a peak efficiency of 90 %. Further LT3972 characteristics are a adjustable 2400 kHz switching frequency and 2 available package option(s): MSOP-10 DFN-10 .

For the LT3972 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. 33.00 V
I-OUT? 3.50 A
V-OUT min. 0.79 V
V-OUT max. 30.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 2400 kHz
Frequency adjustable
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 230 kHz
Frequency adj./ ext.clock max 2450 kHz
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 160 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 4.70 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 90 %
Component count min. 11
current limit adjustable no
Nr.of packages 2
CSP
SC70
SOT
MSOP MSOP-10
QFN/DFN DFN-10
SO/SOIC
SOP
DIP
TO
DDPAK

LT3972 Datasheet

Link to the most up-to-date LT3972 datasheet and the product page for EVM, tools and support information.

LT3972

LT3972 Sample stock and distributor price breaks

LT3972 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 5

Chip One Stop (3)

ProductStockPriceBuy
LT3972EDD#PBF113
16.32 USD
1006.03 USD
Buy Now
LT3972IDD#PBF234
17.61 USD
1007.26 USD
Buy Now
LT3972IMSE#PBF25
17.68 USD
Buy Now

Digi-Key (6)

ProductStockPriceBuy
LT3972EDD#PBF1479
19.25 USD
256.19 USD
1005.26 USD
Buy Now
LT3972IDD#PBF943
111.12 USD
257.44 USD
1006.31 USD
Buy Now
LT3972IMSE#PBF1188
111.38 USD
257.78 USD
1006.61 USD
Buy Now
LT3972HMSE#PBF351
111.92 USD
257.98 USD
1006.77 USD
Buy Now
LT3972EMSE#TRPBF0
25005.61 USD
Buy Now
LT3972EMSE#TRPBF2150
110.76 USD
259.61 USD
1006.73 USD
2506.17 USD
Buy Now
LT3972EMSE#TRPBF2150
110.76 USD
259.61 USD
1006.73 USD
2506.17 USD
Buy Now
LT3972EMSE#PBF0
19.48 USD
256.49 USD
1005.51 USD
Buy Now
LT3972EDD#TRPBF0
25005.37 USD
Buy Now
LT3972IDD#TRPBF0
25006.42 USD
Buy Now
LT3972IMSE#TRPBF0
25006.71 USD
Buy Now
LT3972HMSE#TRPBF0
25006.87 USD
Buy Now

Element14 (2)

ProductStockPriceBuy
LT3972EDD#PBF14
114.43 USD
259.66 USD
1008.21 USD
Buy Now
LT3972EMSE#PBF2
114.79 USD
2510.12 USD
1008.59 USD
Buy Now

Farnell Element14 (2)

ProductStockPriceBuy
LT3972EDD#PBF19Buy Now
LT3972EMSE#PBF2Buy Now
LT3972IDD#PBF0Buy Now

RS Components (4)

ProductStockPriceBuy
LT3972EDD#PBF64Buy Now
LT3972EMSE#PBF12Buy Now
LT3972EMSE#PBF307Buy Now
LT3972IMSE#PBF73Buy Now

Available Distributors without stock: 1

Newark Electronics (0)

ProductStockPriceBuy
LT3972EMSE#PBF0
19.24 USD
256.54 USD
1005.40 USD
Buy Now

Available Distributors with stock: 7

Arrow Electronics

ProductStockPriceBuy
LT3972IDD#PBF 234
17.29 $
1006.19 $
Buy Now
LT3972EDD#PBF 113
16.07 $
1005.16 $
Buy Now
LT3972IMSE#PBF 25
17.63 $
1006.48 $
Buy Now
LT3972EDD#PBF 0
16.07 $
1005.16 $
Buy Now
LT3972IMSE#PBF 0
17.63 $
1006.48 $
Buy Now
LT3972IDD#TRPBF 0
1006.29 $
Buy Now
LT3972HMSE#TRPBF 0
1006.74 $
Buy Now
LT3972EDD#TRPBF 0
1005.26 $
Buy Now
LT3972IMSE#TRPBF 0
1006.58 $
Buy Now
LT3972HMSE#PBF 0
17.82 $
1006.64 $
Buy Now
LT3972EMSE#PBF 0
16.36 $
1005.40 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3972EMSE#TRPBF 2150
2504.96 €
1005.41 €
257.73 €
18.66 €
Buy Now
LT3972EMSE#TRPBF 2150
2504.96 €
1005.41 €
257.73 €
18.66 €
Buy Now
LT3972EDD#PBF 1479
1004.23 €
254.98 €
17.44 €
Buy Now
LT3972IMSE#PBF 1188
1005.32 €
256.26 €
19.15 €
Buy Now
LT3972IDD#PBF 943
1005.08 €
255.98 €
18.94 €
Buy Now
LT3972HMSE#PBF 351
1005.45 €
256.42 €
19.59 €
Buy Now
LT3972EMSE#TRPBF 0
25004.51 €
Buy Now
LT3972EMSE#PBF 0
1004.43 €
255.22 €
17.63 €
Buy Now
LT3972EDD#TRPBF 0
25004.32 €
Buy Now
LT3972IDD#TRPBF 0
25005.16 €
Buy Now
LT3972IMSE#TRPBF 0
25005.40 €
Buy Now
LT3972HMSE#TRPBF 0
25005.53 €
Buy Now
show stock=0hide stock=0

Mouser Electronics

ProductStockPriceBuy
LT3972IDD#PBF 242
111.14 $
1010.21 $
257.44 $
1006.31 $
Buy Now
LT3972EDD#PBF 237
19.27 $
108.49 $
256.19 $
1005.26 $
Buy Now
LT3972IMSE#PBF 100
111.40 $
1010.45 $
257.78 $
1006.61 $
Buy Now
LT3972HMSE#PBF 34
111.94 $
1010.94 $
257.98 $
1006.77 $
Buy Now
LT3972EMSE#PBF 16
19.50 $
108.71 $
256.49 $
1005.51 $
Buy Now
LT3972IMSE#TRPBF 0
112.90 $
1011.97 $
2511.51 $
1008.05 $
2507.38 $
Buy Now
LT3972EMSE#TRPBF 0
110.78 $
1010.00 $
259.61 $
1006.73 $
2506.17 $
Buy Now
LT3972EDD#TRPBF 0
110.52 $
109.76 $
259.38 $
1006.44 $
2505.90 $
Buy Now
LT3972HMSE#TRPBF 0
113.51 $
1012.53 $
2512.05 $
1008.25 $
2507.56 $
Buy Now
LT3972IDD#TRPBF 0
112.61 $
1011.71 $
2511.25 $
1007.70 $
2507.06 $
Buy Now
show stock=0hide stock=0

element14 Asia-Pacific

ProductStockPriceBuy
LT3972EDD#PBF 14
111.54 $
257.73 $
1006.56 $
Buy Now
LT3972EMSE#PBF 1
111.83 $
258.10 $
1006.87 $
Buy Now

Farnell element14

ProductStockPriceBuy
LT3972EDD#PBF 19
17.49 GBP
106.93 GBP
254.24 GBP
504.23 GBP
1004.22 GBP
Buy Now
LT3972EMSE#PBF 1
17.67 GBP
107.11 GBP
256.43 GBP
504.86 GBP
1004.63 GBP
Buy Now

Chip1Stop

ProductStockPriceBuy
LT3972IMSE#PBF 25
17.68 $
Buy Now
LT3972EDD#PBF 113
1006.03 $
16.32 $
Buy Now
LT3972IDD#PBF 234
1007.26 $
17.61 $
Buy Now

RS Components

ProductStockPriceBuy
LT3972EMSE#PBF 12
17.59 GBP
106.94 GBP
256.30 GBP
Buy Now
LT3972EDD#PBF 64
106.51 GBP
255.83 GBP
505.49 GBP
755.41 GBP
Buy Now
LT3972EMSE#PBF 307
106.94 GBP
256.30 GBP
Buy Now
LT3972IMSE#PBF 73
108.04 GBP
257.93 GBP
507.84 GBP
757.74 GBP
Buy Now

Available Distributors without stock: 1

Newark element14

ProductStockPriceBuy
LT3972EMSE#PBF 0
19.24 $
256.54 $
1005.40 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3972. Optional, compare LT3972 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% A8583 A8583 product overviewA8583 product overview Allegro TSSOP-16
0% LT3680 LT3680 product overviewLT3680 product overview Linear Technology DFN-10, MSOP-10
0% TPS54541 TPS54541 product overviewTPS54541 product overview Texas Instruments SON-10
0% TPS54361 TPS54361 product overviewTPS54361 product overview Texas Instruments WSON-10
0% TPS54361-Q1 TPS54361-Q1 product overviewTPS54361-Q1 product overview Texas Instruments WSON-10
10% TPS54362-Q1 TPS54362-Q1 product overviewTPS54362-Q1 product overview Texas Instruments HTSSOP-20
50% A8582 A8582 product overviewA8582 product overview Allegro TSSOP-16
50% A8584 A8584 product overviewA8584 product overview Allegro TSSOP-16
50% LT3480 LT3480 product overviewLT3480 product overview Linear Technology DFN-10, MSOP-10
50% LT3685 LT3685 product overviewLT3685 product overview Linear Technology DFN-10, MSOP-10
50% LT3975 LT3975 product overviewLT3975 product overview Linear Technology MSOP-16
50% LT3980 LT3980 product overviewLT3980 product overview Linear Technology DFN-14, MSOP-16
50% TPS54240 TPS54240 product overviewTPS54240 product overview Texas Instruments SON-10, MSOP-10
50% TPS54240-Q1 TPS54240-Q1 product overviewTPS54240-Q1 product overview Texas Instruments SON-10, MSOP-10
50% TPS54262-Q1 TPS54262-Q1 product overviewTPS54262-Q1 product overview Texas Instruments HTSSOP-20

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3972.

V-IN max. 33 V, I-OUT 3.5 A, V-OUT min. 0.79 V, Frequency typ. 2400 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74402500030 0.3 3.9 5.7 15.00 2.8 x 2.8 x 3
744040420033 0.3 4.5 7.6 13.00 4 x 4 x 1.8
74404300033 0.3 4.0 6.0 8.00 4.8 x 4.8 x 3
74406800024 0.2 4.1 5.8 15.00 8 x 8 x 1.2
74406900022 0.2 5.5 7.5 9.00 8 x 8 x 1.5
744089410022 0.2 4.5 9.5 15.00 4.8 x 4.8 x 2.1
744089420039 0.4 4.2 10.3 15.00 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
744383360033 0.3 5.5 8.3 14.00 3 x 3 x 2
74479276124 0.2 3.6 5.4 19.00 2 x 1.6 x 1
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