LT3571 Boost Converter Overview

Description

Manufacturer
 
Category
Sub-Category

LT3571 is a 75.00 V, 0.47 A switch current limit sync Boost Converter from . The input voltage from 2.70 V to 20.00 V  can be boosted into an output voltage ranging from 3.00 V to 75.00 V.

Features of the Boost Converter are adjustable 1000 kHz switching frequency, a typical inductor size of 10.0 µH and it offers a peak efficiency of  up to 85 %. The minimum external component count is 12 and LT3571 is available in 1 package option(s): QFN-16 .

For LT3571 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. 2.70 V
V-IN max. 20.00 V
Current-Limit typ.? 0.47 A
V-OUT min. 3.00 V
V-OUT max. 75.00 V
VOUT adjustable
VOUT programmable no
sync/non-sync sync
Frequency typ. 1000 kHz
Frequency adjustable adjustable
Frequency selectable
Frequency adj. min. 250 kHz
Frequency adj. max. 2500 kHz
extern clock sync. yes
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
LBI/LBO no
Frequency sync. min. 250 kHz
Frequency sync. max. 2500 kHz
Down Mode no
Quiescent current max. 2200 µA
Operating min. -40 °C
Operating max. 125 °C
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 10.0 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Boost
Peak Efficiency 85 %
Component count min. 12
current limit adjustable no
Nr.of package options 1
CSP
SC70
SOT
MSOP
QFN/DFN QFN-16
SO/SOIC
SOP
DIP
TO
DDPAK

LT3571 Datasheet

Link to the most up-to-date LT3571 datasheet and the product page for EVM, tools and support information.

LT3571

LT3571 Price breaks and distributor sample stock

LT3571 prices and available online distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 4

Chip One Stop (4)

ProductStockPriceBuy
LT3571EUD#PBF363
13.92 USD
1003.13 USD
Buy Now
LT3571EUD#PBF363
13.92 USD
1003.13 USD
Buy Now
LT3571EUD#TRPBF1437
15.37 USD
Buy Now
LT3571IUD#PBF701
16.89 USD
1005.40 USD
Buy Now

Digi-Key (2)

ProductStockPriceBuy
LT3571EUD#PBF1308
15.23 USD
253.50 USD
1002.98 USD
Buy Now
LT3571IUD#PBF457
15.80 USD
253.89 USD
1003.30 USD
Buy Now
LT3571EUD#TRPBF0
25003.08 USD
Buy Now
LT3571IUD#TRPBF0
25003.40 USD
Buy Now

Element14 (2)

ProductStockPriceBuy
LT3571EUD#PBF91
18.30 USD
255.56 USD
1004.73 USD
Buy Now
LT3571IUD#PBF288
18.95 USD
256.00 USD
1005.09 USD
Buy Now

Farnell Element14 (2)

ProductStockPriceBuy
LT3571EUD#PBF138Buy Now
LT3571IUD#PBF288Buy Now

Available Distributors with stock: 6

Arrow Electronics

ProductStockPriceBuy
LT3571EUD#TRPBF 1437
13.02 $
Buy Now
LT3571IUD#PBF 701
13.89 $
1003.30 $
Buy Now
LT3571EUD#PBF 363
13.50 $
1002.98 $
Buy Now
LT3571EUD#TRPBF 0
25003.03 $
Buy Now
LT3571EUD#PBF 0
9682.98 $
Buy Now
LT3571IUD#TRPBF 0
25003.35 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3571EUD#PBF 1308
1002.53 €
252.97 €
14.44 €
Buy Now
LT3571IUD#PBF 457
1002.80 €
253.30 €
14.92 €
Buy Now
LT3571EUD#TRPBF 0
25002.61 €
Buy Now
LT3571IUD#TRPBF 0
25002.88 €
Buy Now
show stock=0hide stock=0

Newark element14

ProductStockPriceBuy
LT3571EUD#PBF 11
12.98 $
252.98 $
1002.98 $
Buy Now
LT3571IUD#PBF 0
15.81 $
253.90 $
1003.30 $
Buy Now
show stock=0hide stock=0

element14 Asia-Pacific

ProductStockPriceBuy
LT3571EUD#PBF 91
16.64 $
254.45 $
1003.78 $
Buy Now
LT3571IUD#PBF 288
17.16 $
254.80 $
1004.07 $
Buy Now

Farnell element14

ProductStockPriceBuy
LT3571EUD#PBF 55
14.42 GBP
252.66 GBP
1002.43 GBP
Buy Now
LT3571IUD#PBF 288
14.88 GBP
252.96 GBP
1002.69 GBP
Buy Now

Chip1Stop

ProductStockPriceBuy
LT3571EUD#PBF 363
13.92 $
1003.13 $
Buy Now
LT3571IUD#PBF 701
16.89 $
1005.40 $
Buy Now
LT3571EUD#TRPBF 1437
15.37 $
Buy Now

Alternatives and equivalents

The following DC/DC Boost Converter are similar to LT3571. Optional, compare LT3571 side-by-side with other Boost 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 LT3571.

V-IN min. 2.7 V, Current-Limit typ. 0.47 A, V-OUT max. 75 V, Frequency typ. 1000 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744305040 0.4 28.0 20.0 0.16 13.5 x 13.3 x 5.2
744308040 0.4 25.0 26.0 0.37 10.1 x 7 x 7
7443081040 0.4 38.0 21.0 0.29 9.4 x 6.2 x 8.1
744310055 0.5 14.0 20.0 3.70 7 x 6.9 x 3.3
744311047 0.4 19.0 25.0 1.85 7 x 6.9 x 4
744314047 0.5 18.0 20.0 1.35 7 x 6.9 x 5
744316047 0.5 15.0 16.0 2.75 5.5 x 5.3 x 4.3
7443340047 0.5 19.0 32.0 2.65 8.4 x 7.9 x 7.5
744355256 0.6 20.0 30.0 1.61 10.5 x 10.2 x 4.2
744373490047 0.5 13.5 30.0 3.50 7.3 x 6.6 x 5
744373770047 0.5 19.0 29.0 1.32 13.5 x 12.6 x 3.5
744373770056 0.6 18.5 28.0 1.40 13.5 x 12.6 x 3.5
74477009 0.5 23.5 26.4 2.90 12 x 12 x 8
7447797050 0.5 13.2 23.0 4.30 10.2 x 10.2 x 4.5
7447798050 0.5 18.5 18.0 2.20 10.2 x 10.2 x 6.4
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