LTC3543 Buck Converter overview

Description

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Category
Sub-Category

LTC3543 is a 5.50 V sync Buck Converter from with 0.60 A output current. The maximum 5.50 V input voltage can be regulated down into a 0.60 V to 5.50 V output voltage.

It requires are a typical inductor size of 3.30 µH, a typical external component count of 7 and achieves a peak efficiency of 96 %. Further LTC3543 characteristics are a fixed 2250 kHz switching frequency and 1 available package option(s): DFN-6 .

For the LTC3543 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. 2.50 V
V-IN max. 5.50 V
I-OUT? 0.60 A
V-OUT min. 0.60 V
V-OUT max. 5.50 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 2250 kHz
Frequency fixed
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 1000 kHz
Frequency adj./ ext.clock max 3000 kHz
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 500 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
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 96 %
Component count min. 7
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN DFN-6
SO/SOIC
SOP
DIP
TO
DDPAK

LTC3543 Datasheet

Link to the most up-to-date LTC3543 datasheet and the product page for EVM, tools and support information.

LTC3543

LTC3543 Sample stock and distributor price breaks

LTC3543 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 5

ARROW-NAC (1)

ProductStockPriceBuy
LTC3543EDCB#TRMPBF234
12.79 USD
1002.29 USD
Buy Now

Chip-One-Stop (1)

ProductStockPriceBuy
LTC3543EDCB#TRMPBF400
15.58 USD
104.41 USD
254.21 USD
503.85 USD
1003.56 USD
2003.41 USD
Buy Now

DIGI-KEY (3)

ProductStockPriceBuy
LTC3543EDCB#TRMPBF500
5002.29 USD
Buy Now
LTC3543EDCB#TRMPBF503
14.50 USD
254.02 USD
1002.75 USD
2502.52 USD
Buy Now
LTC3543EDCB#TRMPBF503
14.50 USD
254.02 USD
1002.75 USD
2502.52 USD
Buy Now
LTC3543EDCB#TRPBF0
25002.29 USD
Buy Now
DC1008A0
00.00 USD
Buy Now

Element14 (1)

ProductStockPriceBuy
LTC3543EDCB#PBF676
16.37 USD
254.44 USD
1004.31 USD
Buy Now

FARNELL-ELEMENT14 (1)

ProductStockPriceBuy
LTC3543EDCB#PBF691Buy Now

Available Distributors without stock: 1

NEWARK (0)

ProductStockPriceBuy
LTC3543EDCB#TRMPBF0
13.21 USD
5002.29 USD
Buy Now
LTC3543EDCB#TRPBF0
13.39 USD
25002.43 USD
Buy Now

Available Distributors with stock: 0

no online Distributor with LTC3543 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3543. Optional, compare LTC3543 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% LTC3560 LTC3560 product overviewLTC3560 product overview Linear Technology TSOT23
0% AAT1142 AAT1142 product overviewAAT1142 product overview Skyworks TSOPJW-12, TDFN-12
0% AAT1171 AAT1171 product overviewAAT1171 product overview Skyworks TDFN-12, WLCSP-12
0% AAT2503 AAT2503 product overviewAAT2503 product overview Skyworks QFN-20
0% AAT2504 AAT2504 product overviewAAT2504 product overview Skyworks QFN-20
10% LTC3542 LTC3542 product overviewLTC3542 product overview Linear Technology DFN-6, SOT23
10% TPS62300 TPS62300 product overviewTPS62300 product overview Texas Instruments SON-10, DSBGA-8
10% TPS62320 TPS62320 product overviewTPS62320 product overview Texas Instruments SON-10, DSBGA-8
25% ISL8010 ISL8010 product overviewISL8010 product overview Intersil MSOP-10
25% LTC1627 LTC1627 product overviewLTC1627 product overview Linear Technology SO-8
25% LTC1707 LTC1707 product overviewLTC1707 product overview Linear Technology SO-8
25% LTC1877 LTC1877 product overviewLTC1877 product overview Linear Technology MSOP-8
25% LTC1878 LTC1878 product overviewLTC1878 product overview Linear Technology MSOP-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3543.

V-IN max. 5.5 V, I-OUT 0.6 A, V-OUT min. 0.6 V, Frequency typ. 2250 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744028001 1.0 1.8 1.5 65.00 2.8 x 2.8 x 1.2
744029001 1.0 2.2 1.6 45.00 2.8 x 2.8 x 1.5
744030001 1.2 1.0 1.1 95.00 3.3 x 3.5 x 1.05
744031001 1.5 1.8 1.6 40.00 3.8 x 3.8 x 1.8
744031010 1.0 2.0 1.6 26.00 3.8 x 3.8 x 1.8
74479773210 1.0 1.2 0.8 180.00 2 x 1.25 x 0.6
74479775210A 1.0 1.3 1.0 110.00 2 x 1.2 x 1.2
74479775215 1.5 1.1 0.8 160.00 2 x 1.2 x 1.2
74479776210 1.0 1.4 1.0 90.00 2 x 1.6 x 1
74479776215 1.5 1.3 0.8 110.00 2 x 1.6 x 1
74479787210B 1.0 2.0 1.2 60.00 2.5 x 2 x 1
74479787215A 1.5 1.9 1.1 70.00 2.5 x 2 x 1
74479876210 1.0 1.5 1.5 70.00 2 x 1.6 x 1
74479887210A 1.0 1.6 1.0 100.00 2.5 x 2 x 1
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