LT3975 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3975 is a 42.00 V non-sync Buck Converter from with 2.50 A output current. The maximum 42.00 V input voltage can be regulated down into a 1.20 V to 40.00 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 90 %. Further LT3975 characteristics are a adjustable 2000 kHz switching frequency and 1 available package option(s): MSOP-16 .

For the LT3975 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. 42.00 V
I-OUT? 2.50 A
V-OUT min. 1.20 V
V-OUT max. 40.00 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. 200 kHz
Frequency adj./ ext.clock max 2000 kHz
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK yes
Quiescent current max. 30 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °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 90 %
Component count min. 10
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN
SO/SOIC
SOP
DIP
TO
DDPAK

LT3975 Datasheet

Link to the most up-to-date LT3975 datasheet and the product page for EVM, tools and support information.

LT3975

LT3975 Sample stock and distributor price breaks

LT3975 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 3

Chip One Stop (2)

ProductStockPriceBuy
LT3975EMSE#PBF324
15.96 USD
1004.95 USD
Buy Now
LT3975IMSE#PBF7
3705.45 USD
Buy Now

Conrad COM (3)

ProductStockPriceBuy
LT3975EMSE#PBF99999999Buy Now
LT3975HMSE#PBF99999999Buy Now
LT3975IMSE#PBF10Buy Now

Digi-Key (4)

ProductStockPriceBuy
LT3975EMSE#PBF1351
16.77 USD
254.52 USD
1003.84 USD
Buy Now
LT3975IMSE#PBF456
17.43 USD
254.97 USD
1004.22 USD
Buy Now
LT3975HMSE#PBF451
17.97 USD
255.33 USD
1004.53 USD
Buy Now
DC1736A5
1127.50 USD
Buy Now
LT3975EMSE#TRPBF0
25003.94 USD
Buy Now
LT3975IMSE#TRPBF0
25004.32 USD
Buy Now
LT3975HMSE#TRPBF0
25004.63 USD
Buy Now

Available Distributors without stock: 1

Newark Electronics (0)

ProductStockPriceBuy
LT3975EMSE#PBF0
16.62 USD
254.44 USD
1003.76 USD
Buy Now
LT3975IMSE#PBF0
17.29 USD
254.89 USD
1004.14 USD
Buy Now

Available Distributors with stock: 3

Arrow Electronics

ProductStockPriceBuy
LT3975EMSE#PBF 324
373.76 $
Buy Now
LT3975IMSE#PBF 7
374.14 $
Buy Now
LT3975EMSE#PBF 0
14.43 $
1003.76 $
Buy Now
LT3975EMSE#PBF 0
4073.76 $
Buy Now
LT3975IMSE#PBF 0
3704.14 $
Buy Now
LT3975HMSE#TRPBF 0
25004.54 $
Buy Now
LT3975HMSE#PBF 0
3334.44 $
Buy Now
LT3975IMSE#TRPBF 0
25004.19 $
Buy Now
LT3975IMSE#TRPBF 0
25004.24 $
Buy Now
LT3975EMSE#TRPBF 0
25003.81 $
Buy Now
LT3975EMSE#TRPBF 0
25003.86 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3975EMSE#PBF 1351
1003.21 €
253.78 €
15.67 €
Buy Now
LT3975IMSE#PBF 456
1003.53 €
254.16 €
16.22 €
Buy Now
LT3975HMSE#PBF 451
1003.79 €
254.46 €
16.67 €
Buy Now
DC1736A 5
1106.70 €
Buy Now
LT3975EMSE#TRPBF 0
25003.30 €
Buy Now
LT3975IMSE#TRPBF 0
25003.62 €
Buy Now
LT3975HMSE#TRPBF 0
25003.88 €
Buy Now
show stock=0hide stock=0

Chip1Stop

ProductStockPriceBuy
LT3975EMSE#PBF 324
15.96 $
1004.95 $
Buy Now
LT3975IMSE#PBF 7
3705.45 $
Buy Now

Available Distributors without stock: 2

Newark element14

ProductStockPriceBuy
LT3975EMSE#PBF 0
16.62 $
254.44 $
1003.76 $
Buy Now
LT3975IMSE#PBF 0
17.29 $
254.89 $
1004.14 $
Buy Now

Mouser Electronics

ProductStockPriceBuy
LT3975HMSE#PBF 0
1854.53 $
Buy Now
LT3975EMSE#PBF 0
2223.84 $
Buy Now
LT3975IMSE#TRPBF 0
25004.33 $
Buy Now
LT3975IMSE#PBF 0
1854.23 $
Buy Now
LT3975EMSE#TRPBF 0
25003.94 $
Buy Now
LT3975HMSE#TRPBF 0
25004.64 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3975. Optional, compare LT3975 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% A8584 A8584 product overviewA8584 product overview Allegro TSSOP-16
0% LT3976 LT3976 product overviewLT3976 product overview Linear Technology MSOP-16
0% TPS54240 TPS54240 product overviewTPS54240 product overview Texas Instruments SON-10, MSOP-10
0% TPS54240-Q1 TPS54240-Q1 product overviewTPS54240-Q1 product overview Texas Instruments SON-10, MSOP-10
0% TPS54362-Q1 TPS54362-Q1 product overviewTPS54362-Q1 product overview Texas Instruments HTSSOP-20
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% LM26003 LM26003 product overviewLM26003 product overview Texas Instruments HTSSOP-20
10% LM26003-Q1 LM26003-Q1 product overviewLM26003-Q1 product overview Texas Instruments HTSSOP-20
25% A8582 A8582 product overviewA8582 product overview Allegro TSSOP-16
25% LT3480 LT3480 product overviewLT3480 product overview Linear Technology DFN-10, MSOP-10
25% LT3481 LT3481 product overviewLT3481 product overview Linear Technology DFN-10, MSOP-10
25% LT3980 LT3980 product overviewLT3980 product overview Linear Technology DFN-14, MSOP-16
25% TPS54262-Q1 TPS54262-Q1 product overviewTPS54262-Q1 product overview Texas Instruments HTSSOP-20
50% LT3971 LT3971 product overviewLT3971 product overview Linear Technology DFN-10, MSOP-10
50% LT3971A LT3971A product overviewLT3971A product overview Linear Technology MSOP-8
50% LT3991 LT3991 product overviewLT3991 product overview Linear Technology DFN-10, MSOP-10
50% LM26001 LM26001 product overviewLM26001 product overview Texas Instruments HTSSOP-16
50% LM26001-Q1 LM26001-Q1 product overviewLM26001-Q1 product overview Texas Instruments HTSSOP-16
50% TPS54140A TPS54140A product overviewTPS54140A 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 LT3975.

V-IN max. 42 V, I-OUT 2.5 A, V-OUT min. 1.2 V, Frequency typ. 2000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74402500072 0.7 3.0 4.0 23.50 2.8 x 2.8 x 3
744040240068 0.7 2.5 3.5 35.00 2.5 x 2 x 1.2
74404200056 0.6 3.1 3.0 19.00 4.8 x 4.8 x 2
74404300082 0.8 3.5 3.7 14.00 4.8 x 4.8 x 3
74406800056 0.6 3.4 4.0 22.00 8 x 8 x 1.2
74406900052 0.5 4.3 5.8 15.00 8 x 8 x 1.5
74407000082 0.8 6.2 5.5 8.50 8 x 8 x 2
744383230068 0.7 3.1 4.7 46.00 2.5 x 2 x 1
744383230082 0.8 2.6 4.3 53.00 2.5 x 2 x 1
744383240056 0.6 3.3 6.0 37.00 2.5 x 2 x 1.2
744383240068 0.7 3.2 5.9 45.00 2.5 x 2 x 1.2
74479276168 0.7 2.5 3.4 45.00 2 x 1.6 x 1
784383230068 0.7 3.1 4.7 46.00 2.5 x 2 x 1
784383230082 0.8 2.6 4.3 53.00 2.5 x 2 x 1
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