LTC3549 Buck Converter overview

Description

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Category
Sub-Category

LTC3549 is a 5.50 V sync Buck Converter from with 0.25 A output current. The maximum 5.50 V input voltage can be regulated down into a 0.60 V to 5.00 V output voltage.

It requires are a typical inductor size of 3.30 µH, a typical external component count of 6 and achieves a peak efficiency of 93 %. Further LTC3549 characteristics are a fixed 2250 kHz switching frequency and 1 available package option(s): DFN-6 .

For the LTC3549 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. 1.60 V
V-IN max. 5.50 V
I-OUT? 0.25 A
V-OUT min. 0.60 V
V-OUT max. 5.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 2250 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 475 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ. 150 °C
Inductor size typ. 3.30 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 93 %
Component count min. 6
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN DFN-6
SO/SOIC
SOP
DIP
TO
DDPAK

LTC3549 Datasheet

Link to the most up-to-date LTC3549 datasheet and the product page for EVM, tools and support information.

LTC3549

LTC3549 Sample stock and distributor price breaks

LTC3549 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 6

Chip-One-Stop (2)

ProductStockPriceBuy
LTC3549EDCB#TRMPBF1500
5002.27 USD
10002.24 USD
Buy Now
LTC3549EDCB#TRMPBF618
13.31 USD
102.77 USD
502.58 USD
1002.55 USD
2002.49 USD
5002.35 USD
Buy Now

DIGI-KEY (2)

ProductStockPriceBuy
LTC3549EDCB#TRMPBF0
5001.69 USD
Buy Now
LTC3549EDCB#TRMPBF20
13.35 USD
252.99 USD
1002.03 USD
2501.86 USD
Buy Now
LTC3549EDCB#TRMPBF20
13.35 USD
252.99 USD
1002.03 USD
2501.86 USD
Buy Now
LTC3549EDCB#TRPBF0
25001.69 USD
Buy Now

Element14 (2)

ProductStockPriceBuy
LTC3549EDCB#TRMPBF450
15.36 USD
254.78 USD
1003.25 USD
2502.98 USD
Buy Now
LTC3549EDCB#TRMPBF450
15.36 USD
254.78 USD
1003.25 USD
2502.98 USD
Buy Now

FARNELL-ELEMENT14 (2)

ProductStockPriceBuy
LTC3549EDCB#TRMPBF450Buy Now
LTC3549EDCB#TRMPBF450Buy Now

NEWARK (1)

ProductStockPriceBuy
LTC3549EDCB#PBF22
11.76 USD
Buy Now
LTC3549EDCB#TRMPBF0
12.37 USD
5001.69 USD
Buy Now

RS-COMPONENTS (2)

ProductStockPriceBuy
LTC3549EDCB#TRMPBF510Buy Now
LTC3549EDCB#TRMPBF500Buy Now

Available Distributors with stock: 0

no online Distributor with LTC3549 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LTC3549. Optional, compare LTC3549 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% AOZ1605DI AOZ1605DI product overviewAOZ1605DI product overview Alpha Omega DFN
0% LTC3103 LTC3103 product overviewLTC3103 product overview Linear Technology DFN-10, MSOP-10
0% LTC3542 LTC3542 product overviewLTC3542 product overview Linear Technology DFN-6, SOT23
0% MAX8560 MAX8560 product overviewMAX8560 product overview Maxim DFN-8, TSOT23-5
0% MAX8561 MAX8561 product overviewMAX8561 product overview Maxim TDFN-EP-8
0% MAX8562 MAX8562 product overviewMAX8562 product overview Maxim TDFN-EP-8
0% AAT1120 AAT1120 product overviewAAT1120 product overview Skyworks STDFN-8
0% AAT1121 AAT1121 product overviewAAT1121 product overview Skyworks TDFN-8
0% AAT1130 AAT1130 product overviewAAT1130 product overview Skyworks SC70-8
0% AAT2120 AAT2120 product overviewAAT2120 product overview Skyworks STDFN-8
0% AAT2500 AAT2500 product overviewAAT2500 product overview Skyworks TDFN-12
0% AAT2500M AAT2500M product overviewAAT2500M product overview Skyworks TSOPJW-12
0% SKY87250 SKY87250 product overviewSKY87250 product overview Skyworks DFN-8
0% TPS62240 TPS62240 product overviewTPS62240 product overview Texas Instruments SON-6, SOT-5
0% TPS62300 TPS62300 product overviewTPS62300 product overview Texas Instruments SON-10, DSBGA-8
0% TPS62320 TPS62320 product overviewTPS62320 product overview Texas Instruments SON-10, DSBGA-8
0% RP509Z-2 RP509Z-2 product overviewRP509Z-2 product overview Ricoh WLCSP-6
10% MIC23030 MIC23030 product overviewMIC23030 product overview Micrel MLF-6
10% MIC23031 MIC23031 product overviewMIC23031 product overview Micrel MLF-6
10% LM3670 LM3670 product overviewLM3670 product overview Texas Instruments SOT23-5
10% TPS62200 TPS62200 product overviewTPS62200 product overview Texas Instruments SOT23-5
10% TPS62220 TPS62220 product overviewTPS62220 product overview Texas Instruments TSOT23-5

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LTC3549.

V-IN max. 5.5 V, I-OUT 0.25 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)
74479776233A 3.3 1.3 0.3 120.00 2 x 1.6 x 1
74479787233A 3.3 1.6 0.4 100.00 2.5 x 2 x 1
74479887233A 3.3 1.2 0.6 180.00 2.5 x 2 x 1
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