LT3581 Boost Converter Overview

Description

Manufacturer
 
Category
Sub-Category

LT3581 is a 42.00 V, 4.30 A switch current limit non-sync Boost Converter from . The input voltage from 2.50 V to 22.00 V  can be boosted into an output voltage ranging from 3.70 V to 42.00 V.

Features of the Boost Converter are adjustable 2500 kHz switching frequency, a typical inductor size of 1.5 µH and it offers a peak efficiency of  up to 88 %. The minimum external component count is 17 and LT3581 is available in 2 package option(s): MSOP-16 DFN-14 .

For LT3581 replacement search, 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. 2.50 V
V-IN max. 22.00 V
Current-Limit typ.? 4.30 A
V-OUT min. 3.70 V
V-OUT max. 42.00 V
VOUT adjustable
VOUT programmable no
sync/non-sync non-sync
Frequency typ. 2500 kHz
Frequency adjustable adjustable
Frequency selectable
Frequency adj. min. 200 kHz
Frequency adj. max. 2500 kHz
extern clock sync. yes
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK no
LBI/LBO no
Frequency sync. min. 200 kHz
Frequency sync. max. 2500 kHz
Down Mode no
Quiescent current max. 2300 µA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 1.5 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Boost
Peak Efficiency 88 %
Component count min. 17
current limit adjustable no
Nr.of package options 2
CSP
SC70
SOT
MSOP MSOP-16
QFN/DFN DFN-14
SO/SOIC
SOP
DIP
TO
DDPAK

LT3581 Datasheet

Link to the most up-to-date LT3581 datasheet and the product page for EVM, tools and support information.

LT3581

LT3581 Price breaks and distributor sample stock

LT3581 prices and available online distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 7

ARROW-NAC (3)

ProductStockPriceBuy
LT3581EMSE#PBF1209
13.64 USD
1003.10 USD
Buy Now
LT3581EDE#PBF910
13.50 USD
1002.98 USD
Buy Now
LT3581IDE#PBF53
13.89 USD
1003.30 USD
Buy Now

Chip-One-Stop (3)

ProductStockPriceBuy
LT3581EDE#PBF192
15.68 USD
104.78 USD
254.72 USD
504.51 USD
1004.40 USD
Buy Now
LT3581EMSE#PBF1250
15.76 USD
104.84 USD
254.79 USD
504.57 USD
1004.46 USD
2004.25 USD
Buy Now
LT3581IDE#PBF190
15.94 USD
105.00 USD
254.94 USD
504.71 USD
1004.60 USD
Buy Now

DIGI-KEY (4)

ProductStockPriceBuy
LT3581EDE#PBF500
15.23 USD
253.50 USD
1002.98 USD
Buy Now
LT3581EMSE#PBF2206
15.45 USD
253.64 USD
1003.10 USD
Buy Now
LT3581IDE#PBF289
15.80 USD
253.89 USD
1003.30 USD
Buy Now
LT3581HDE#PBF66
16.36 USD
254.24 USD
1003.61 USD
Buy Now
LT3581EDE#TRPBF0
25003.08 USD
Buy Now
LT3581EMSE#TRPBF0
25003.20 USD
Buy Now
LT3581IDE#TRPBF0
25003.40 USD
Buy Now
LT3581IMSE#PBF0
2223.44 USD
Buy Now
LT3581IMSE#TRPBF0
25003.54 USD
Buy Now
LT3581HDE#TRPBF0
25003.71 USD
Buy Now

Element14 (1)

ProductStockPriceBuy
LT3581EMSE#PBF10
18.71 USD
255.82 USD
1004.96 USD
Buy Now

FARNELL-ELEMENT14 (1)

ProductStockPriceBuy
LT3581EMSE#PBF10Buy Now

NEWARK (1)

ProductStockPriceBuy
LT3581EDE#PBF0
15.25 USD
253.52 USD
1002.98 USD
Buy Now
LT3581EDE#TRPBF0
15.08 USD
25003.64 USD
Buy Now
LT3581EMSE#PBF0
13.23 USD
Buy Now
LT3581HDE#PBF90
13.61 USD
253.61 USD
1003.61 USD
Buy Now
LT3581IDE#PBF0
15.81 USD
253.90 USD
1003.30 USD
Buy Now
LT3581IDE#TRPBF0
15.64 USD
25004.05 USD
Buy Now

RS-COMPONENTS (1)

ProductStockPriceBuy
LT3581EMSE#PBF35Buy Now

Available Distributors with stock: 0

no online Distributor with LT3581 stock available

Alternatives and equivalents

The following DC/DC Boost Converter are similar to LT3581. Optional, compare LT3581 side-by-side with other Boost Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LT3579 LT3579 product overviewLT3579 product overview Linear Technology QFN-20, TSSOP-20
10% LT3959 LT3959 product overviewLT3959 product overview Linear Technology QFN-36
25% LT3957 LT3957 product overviewLT3957 product overview Linear Technology QFN-36
25% LT3957A LT3957A product overviewLT3957A product overview Linear Technology QFN-36
25% TPS61175 TPS61175 product overviewTPS61175 product overview Texas Instruments HTSSOP-14
25% TPS61175-Q1 TPS61175-Q1 product overviewTPS61175-Q1 product overview Texas Instruments HTSSOP-14
50% LT3580 LT3580 product overviewLT3580 product overview Linear Technology MSOP-8, DFN-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3581.

V-IN min. 2.5 V, Current-Limit typ. 4.3 A, V-OUT max. 42 V, Frequency typ. 2500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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