LT3431 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3431 is a 60.00 V non-sync Buck Converter from with 2.75 A output current. The maximum 60.00 V input voltage can be regulated down into a 1.20 V to 30.00 V output voltage.

It requires are a typical inductor size of 10.00 µH, a typical external component count of 11 and achieves a peak efficiency of 89 %. Further LT3431 characteristics are a fixed 500 kHz switching frequency and 1 available package option(s): TSSOP-16 .

For the LT3431 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. 5.50 V
V-IN max. 60.00 V
I-OUT? 2.75 A
V-OUT min. 1.20 V
V-OUT max. 30.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 500 kHz
Frequency fixed
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 580 kHz
Frequency adj./ ext.clock max 700 kHz
Softstart no
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 2200 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 10.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 89 %
Component count min. 11
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP TSSOP-16
DIP
TO
DDPAK

LT3431 Datasheet

Link to the most up-to-date LT3431 datasheet and the product page for EVM, tools and support information.

LT3431

LT3431 Sample stock and distributor price breaks

LT3431 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 7

ARROW-NAC (3)

ProductStockPriceBuy
LT3431EFE#PBF969
17.07 USD
1005.82 USD
Buy Now
LT3431EFE#TRPBF2500
25005.93 USD
Buy Now
LT3431IFE#PBF675
18.13 USD
1006.69 USD
Buy Now

Chip-One-Stop (3)

ProductStockPriceBuy
LT3431EFE#PBF95
17.15 USD
105.95 USD
505.72 USD
Buy Now
LT3431EFE#PBF3343
110.70 USD
59.08 USD
108.98 USD
258.57 USD
508.36 USD
1007.93 USD
Buy Now
LT3431IFE#PBF15
113.30 USD
511.30 USD
1011.10 USD
Buy Now

DIGI-KEY (3)

ProductStockPriceBuy
LT3431EFE#PBF560
19.95 USD
257.07 USD
1005.82 USD
Buy Now
LT3431IFE#PBF294
111.43 USD
258.13 USD
1006.69 USD
Buy Now
DC549A4
1150.75 USD
Buy Now
LT3431EFE#TRPBF0
25005.92 USD
Buy Now
LT3431IFE#TRPBF0
25006.79 USD
Buy Now

Element14 (1)

ProductStockPriceBuy
LT3431EFE#PBF0
115.90 USD
2511.30 USD
1009.30 USD
Buy Now
LT3431IFE#PBF62
118.27 USD
2512.99 USD
10010.69 USD
Buy Now

FARNELL-ELEMENT14 (1)

ProductStockPriceBuy
LT3431IFE#PBF62Buy Now

NEWARK (1)

ProductStockPriceBuy
LT3431EFE#PBF0
19.96 USD
256.76 USD
1005.82 USD
Buy Now
LT3431IFE#PBF72
111.44 USD
257.76 USD
1006.69 USD
Buy Now
LT3431IFE#TRPBF0
111.79 USD
25008.46 USD
Buy Now

RS-COMPONENTS (2)

ProductStockPriceBuy
LT3431EFE#PBF42Buy Now
LT3431IFE#PBF60Buy Now

Available Distributors with stock: 0

no online Distributor with LT3431 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3431. Optional, compare LT3431 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3430 LT3430 product overviewLT3430 product overview Linear Technology TSSOP-16
0% LT3430-1 LT3430-1 product overviewLT3430-1 product overview Linear Technology TSSOP-16
10% LT3434 LT3434 product overviewLT3434 product overview Linear Technology TSSOP-16
10% LT3435 LT3435 product overviewLT3435 product overview Linear Technology TSSOP-16
25% MAX5090 MAX5090 product overviewMAX5090 product overview Maxim TQFN-16
50% IFX91041EJ V IFX91041EJ V product overviewIFX91041EJ V product overview Infineon PG-DSO-8
50% TLE8366 TLE8366 product overviewTLE8366 product overview Infineon DSO-8
50% IXD3250-3 IXD3250-3 product overviewIXD3250-3 product overview IXYS SOP-8
50% IXD3250-5 IXD3250-5 product overviewIXD3250-5 product overview IXYS SOP-8
50% IXD3251-3 IXD3251-3 product overviewIXD3251-3 product overview IXYS SOP-8
50% IXD3251-5 IXD3251-5 product overviewIXD3251-5 product overview IXYS SOP-8
50% MAX16936 MAX16936 product overviewMAX16936 product overview Maxim TQFN-32
50% MAX16977 MAX16977 product overviewMAX16977 product overview Maxim TSSOP-EP-16, TQFN-16
50% MAX5082 MAX5082 product overviewMAX5082 product overview Maxim TQFN-16
50% MAX5083 MAX5083 product overviewMAX5083 product overview Maxim TQFN-16
50% CS51411 CS51411 product overviewCS51411 product overview ON Semiconductor SOIC-8, DFN-18
50% CS51413 CS51413 product overviewCS51413 product overview ON Semiconductor SOIC-8, DFN-18
50% NCP1547 NCP1547 product overviewNCP1547 product overview ON Semiconductor SOIC-8, DFN-18
50% NCV51411 NCV51411 product overviewNCV51411 product overview ON Semiconductor SOIC-8, DFN-18
50% NCV8842 NCV8842 product overviewNCV8842 product overview ON Semiconductor DFN-18
50% NCV8843 NCV8843 product overviewNCV8843 product overview ON Semiconductor SOIC-8, DFN-18
50% NCV890201 NCV890201 product overviewNCV890201 product overview ON Semiconductor DFN-10
50% NCV890231 NCV890231 product overviewNCV890231 product overview ON Semiconductor SOIC-8
50% A5972D A5972D product overviewA5972D product overview ST SO-8
50% A5973AD A5973AD product overviewA5973AD product overview ST SO-8
50% A5973D A5973D product overviewA5973D product overview ST SO-8
50% A5974AD A5974AD product overviewA5974AD product overview ST SO-8
50% A5974D A5974D product overviewA5974D product overview ST SO-8
50% A5975AD A5975AD product overviewA5975AD product overview ST SO-8
50% A7985A A7985A product overviewA7985A product overview ST HSOP-8
50% B5973D B5973D product overviewB5973D product overview ST SO-8
50% L5972D L5972D product overviewL5972D product overview ST SO-8
50% L5973AD L5973AD product overviewL5973AD product overview ST HSOP-8
50% L5973D L5973D product overviewL5973D product overview ST HSOP-8
50% XC9250-3 XC9250-3 product overviewXC9250-3 product overview Torex SOP-8
50% XC9250-5 XC9250-5 product overviewXC9250-5 product overview Torex SOP-8
50% XC9251-3 XC9251-3 product overviewXC9251-3 product overview Torex SOP-8
50% XC9251-5 XC9251-5 product overviewXC9251-5 product overview Torex SOP-8
50% XC9270-C XC9270-C product overviewXC9270-C product overview Torex SOP-8
50% XC9270-D XC9270-D product overviewXC9270-D product overview Torex SOP-8
50% XC9271-C XC9271-C product overviewXC9271-C product overview Torex SOP-8
50% XC9271-D XC9271-D product overviewXC9271-D product overview Torex SOP-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3431.

V-IN max. 60 V, I-OUT 2.75 A, V-OUT min. 1.2 V, Frequency typ. 500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404052022 2.2 3.0 3.6 31.60 5 x 5 x 2
74404054022 2.2 3.8 5.3 19.00 5 x 5 x 4
74404054033 3.3 3.4 4.3 24.00 5 x 5 x 4
74404063022 2.2 3.8 5.6 20.00 6 x 6 x 2.8
74404063033 3.3 3.5 4.5 25.00 6 x 6 x 2.8
74404064033 3.3 3.7 6.5 21.00 6 x 6 x 4.5
7440650022 2.2 6.2 5.9 11.00 10 x 10 x 3.1
7440650033 3.3 5.3 4.7 15.00 10 x 10 x 3.1
744071022 2.2 5.4 6.3 10.00 8 x 8 x 4.6
74408943022 2.2 3.0 4.6 26.00 4.8 x 4.8 x 4.1
744316330 3.3 5.8 5.8 18.50 5.5 x 5.3 x 4.3
74437324022 2.2 3.3 6.5 51.00 4.45 x 4.06 x 2
74438356022 2.2 4.7 6.2 29.00 4.1 x 4.1 x 2.1
74438356033 3.3 3.6 5.5 39.90 4.1 x 4.1 x 2.1
7447462022 2.2 6.3 4.3 10.00 5.5 x 5.5 x 8.5
7447462033 3.3 4.7 4.0 16.00 5.5 x 5.5 x 8.5
744772033 3.3 5.0 6.3 9.50 7.8 x 7.8 x 10
744777002 2.2 6.0 6.5 13.00 7.3 x 7.3 x 4.5
744777003 3.3 3.5 4.6 25.00 7.3 x 7.3 x 4.5
7447779002 2.2 4.2 6.0 16.00 7.3 x 7.3 x 4.5
7447779003 3.3 3.3 4.5 26.00 7.3 x 7.3 x 4.5
744778002 2.2 4.0 4.8 14.00 7.3 x 7.3 x 3.4
744778003 3.3 3.1 4.1 24.00 7.3 x 7.3 x 3.4
7447785002 2.2 2.9 3.3 43.00 5.9 x 6.2 x 3.3
7447786002 2.2 3.5 4.0 40.00 5.9 x 6.2 x 5.1
7447789002 2.2 4.0 4.8 19.00 7.3 x 7.3 x 3.5
7447789003 3.3 3.4 4.2 24.00 7.3 x 7.3 x 3.5
744787027 2.7 4.4 4.5 13.50 7.8 x 7 x 5
784775022 2.2 6.0 6.0 8.00 7 x 7.8 x 5.5
784775033 3.3 4.9 4.9 12.00 7 x 7.8 x 5.5
784778022 2.2 3.1 5.0 42.00 7.3 x 7.3 x 3.5
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