LT3503 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

LT3503 is a 20.00 V non-sync Buck Converter from with 1.20 A output current. The maximum 20.00 V input voltage can be regulated down into a 0.78 V to 18.00 V output voltage.

It requires are a typical inductor size of 2.50 µH, a typical external component count of 9 and achieves a peak efficiency of 82 %. Further LT3503 characteristics are a fixed 2200 kHz switching frequency and 1 available package option(s): DFN-6 .

For the LT3503 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. 3.60 V
V-IN max. 20.00 V
I-OUT? 1.20 A
V-OUT min. 0.78 V
V-OUT max. 18.00 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 2200 kHz
Frequency fixed
Frequency selectable
ext.clock sync. no
Frequency adj./ ext.clock min.
Frequency adj./ ext.clock max
Softstart yes
Softstart adjustable yes
Tracking no
PG/Power OK no
Quiescent current max. 2600 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ.
Inductor size typ. 2.50 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 82 %
Component count min. 9
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN DFN-6
SO/SOIC
SOP
DIP
TO
DDPAK

LT3503 Datasheet

Link to the most up-to-date LT3503 datasheet and the product page for EVM, tools and support information.

LT3503

LT3503 Sample stock and distributor price breaks

LT3503 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 7

Conrad COM (1)

ProductStockPriceBuy
LT3503EDCB#TRMPBF5Buy Now

Conrad UK (1)

ProductStockPriceBuy
LT3503EDCB#TRMPBF5Buy Now

Digi-Key (3)

ProductStockPriceBuy
LT3503EDCB#TRMPBF3000
5002.75 USD
Buy Now
LT3503EDCB#TRMPBF3849
15.28 USD
254.72 USD
1003.30 USD
2503.03 USD
Buy Now
LT3503EDCB#TRMPBF3849
15.28 USD
254.72 USD
1003.30 USD
2503.03 USD
Buy Now
ACPL-T350-300E0
29001.13 USD
Buy Now
ACPL-T350-360E0
28501.16 USD
Buy Now
LT3503EDCB#TRPBF0
25002.70 USD
Buy Now

Element14 (4)

ProductStockPriceBuy
LT3503EDCB#PBF113
17.75 USD
255.48 USD
1003.87 USD
Buy Now
LT3503EDCB#PBF113
17.75 USD
255.48 USD
1003.87 USD
Buy Now
LT3503EDCB#TRMPBF10
13.54 USD
Buy Now
LT3503EDCB#TRMPBF10
13.54 USD
Buy Now

Farnell Element14 (1)

ProductStockPriceBuy
LT3503EDCB#PBF79Buy Now
LT3503EDCB#PBF0Buy Now
LT3503EDCB#TRMPBF0Buy Now
LT3503EDCB#TRMPBF0Buy Now

Mouser Electronics (1)

ProductStockPriceBuy
LT3503EDCB#TRMPBF405
15.43 USD
105.04 USD
254.84 USD
1003.39 USD
2503.10 USD
5002.83 USD
Buy Now
ACPL-T350-300ENone
12.90 USD
102.06 USD
1001.61 USD
5001.39 USD
10001.23 USD
25001.17 USD
50001.16 USD
Buy Now
ACPL-T350-360ENone
12.98 USD
102.10 USD
1001.65 USD
5001.41 USD
10001.26 USD
25001.19 USD
50001.19 USD
Buy Now
LT3503EDCB#TRPBFNone
25002.76 USD
Buy Now

RS Components (1)

ProductStockPriceBuy
LT3503EDCB#TRMPBF15Buy Now

Available Distributors without stock: 2

Rutronik (0)

ProductStockPriceBuy
nnBuy Now

TTI (0)

ProductStockPriceBuy
TW-20-07-L-T-350-320
AMERICAS0.00 USD
Buy Now

Available Distributors with stock: 10

Arrow Electronics

ProductStockPriceBuy
LT3503EDCB#TRMPBF 775
13.26 $
1002.70 $
Buy Now
LT3503EDCB#TRMPBF 500
13.26 $
1002.70 $
Buy Now
LT3503EDCB#PBF 0
12.84 $
Buy Now
LT3503EDCB#TRPBF 0
13.21 $
1002.65 $
Buy Now
show stock=0hide stock=0

Digi-Key

ProductStockPriceBuy
LT3503EDCB#TRMPBF 3849
2502.58 €
1002.82 €
254.02 €
14.50 €
Buy Now
LT3503EDCB#TRMPBF 3849
2502.58 €
1002.82 €
254.02 €
14.50 €
Buy Now
LT3503EDCB#TRMPBF 3000
5002.35 €
Buy Now
ACPL-T350-300E 0
29000.82 €
Buy Now
ACPL-T350-360E 0
28500.84 €
Buy Now
LT3503EDCB#TRPBF 0
25002.31 €
Buy Now
show stock=0hide stock=0

Avnet

ProductStockPriceBuy
ACPL-T350-300E 3450
11.49 €
101.36 €
251.24 €
501.19 €
1001.15 €
5001.10 €
10001.07 €
Buy Now
ACPL-T350-360E 0
28501.22 $
29501.19 $
58001.14 $
142501.13 $
285001.10 $
Buy Now
ACPL-T350-300E 0
29001.19 $
30001.16 $
59001.11 $
145001.10 $
290001.07 $
Buy Now
TW-20-07-L-T-350-320 0
17.99 $
107.79 $
257.59 $
507.39 $
1006.99 $
5005.79 $
10004.69 $
Buy Now
show stock=0hide stock=0

Mouser Electronics

ProductStockPriceBuy
LT3503EDCB#TRMPBF 405
15.29 $
104.91 $
254.72 $
1003.30 $
2503.03 $
5002.75 $
Buy Now
LT3503EDCB#TRPBF 0
25002.70 $
Buy Now
LT3503EDCB 0 Buy Now
LT3503EDCB#TRM 0 Buy Now
LT3503EDCB#TR 0 Buy Now
LT3503EDCB#PBF 0 Buy Now
ACPL-T350-560E 2389
12.90 $
102.05 $
1001.61 $
5001.38 $
10001.23 $
20001.16 $
50001.12 $
Buy Now
ACPL-T350-500E 2804
12.83 $
102.01 $
1001.57 $
5001.35 $
10001.20 $
20001.14 $
50001.09 $
Buy Now
ACPL-T350-300E 0
12.83 $
102.01 $
1001.57 $
5001.35 $
10001.20 $
25001.14 $
50001.09 $
Buy Now
ACPL-T350-360E 0
12.90 $
102.05 $
1001.61 $
5001.38 $
10001.23 $
25001.16 $
50001.12 $
Buy Now
show stock=0hide stock=0

TME Electronic Components

ProductStockPriceBuy
ACPL-T350-300E 73
12.11 $
51.79 $
251.67 $
1001.49 $
Buy Now
ACPL-T350-300E 73
12.12 $
51.81 $
251.68 $
1001.50 $
Buy Now

ComS.I.T.

ProductStockPriceBuy
ACPLT350300E 400

element14 Asia-Pacific

ProductStockPriceBuy
LT3503EDCB#PBF 113
16.20 $
254.38 $
1003.09 $
Buy Now
LT3503EDCB#PBF 113
16.20 $
254.38 $
1003.09 $
Buy Now
LT3503EDCB#TRMPBF 10
12.83 $
Buy Now
LT3503EDCB#TRMPBF 10
12.83 $
Buy Now

Farnell element14

ProductStockPriceBuy
LT3503EDCB#PBF 79
14.40 GBP
103.86 GBP
253.53 GBP
502.94 GBP
1002.34 GBP
Buy Now
LT3503EDCB#TRMPBF 0
14.44 GBP
253.57 GBP
1002.20 GBP
Buy Now
show stock=0hide stock=0

Chip One Exchange

ProductStockPriceBuy
LT3503EDCBTRPBF 18583

RS Components

ProductStockPriceBuy
LT3503EDCB#TRMPBF 15
54.49 GBP
254.02 GBP
1253.55 GBP
2503.08 GBP
Buy Now

Available Distributors without stock: 2

Onlinecomponents.com

ProductStockPriceBuy
TW-20-07-L-T-350-320 0
16.58 $
Buy Now

Samtec

ProductStockPriceBuy
TW-20-07-L-T-350-320 0
16.61 $
Buy Now

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to LT3503. Optional, compare LT3503 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% ISL8500 ISL8500 product overviewISL8500 product overview Intersil DFN-12
0% MP2490DQ MP2490DQ product overviewMP2490DQ product overview MPS SOIC-8, QFN-10
0% MP2490DS MP2490DS product overviewMP2490DS product overview MPS SOIC-8, QFN-10
0% MP2490CP MP2490CP product overviewMP2490CP product overview MPS SOIC-8, QFN-10
0% MP2492 MP2492 product overviewMP2492 product overview MPS SOIC-8E, QFN-10
0% MP2493 MP2493 product overviewMP2493 product overview MPS SOIC-8E
0% MP2494 MP2494 product overviewMP2494 product overview MPS SOIC-8E
0% MP2495 MP2495 product overviewMP2495 product overview MPS SOIC-16
0% MPQ2490 MPQ2490 product overviewMPQ2490 product overview MPS QFN-10
0% R1243-A-B R1243-A-B product overviewR1243-A-B product overview Ricoh HSOP-8, DFN-10
0% R1243-C-D R1243-C-D product overviewR1243-C-D product overview Ricoh HSOP-8, DFN-10
10% AP3201A AP3201A product overviewAP3201A product overview BCDSemi HMSOP-10
10% ISL85001 ISL85001 product overviewISL85001 product overview Intersil DFN-12
10% BD9325 BD9325 product overviewBD9325 product overview Rohm SOP-8
10% BD9328 BD9328 product overviewBD9328 product overview Rohm HTSOP-8
25% MP2364 MP2364 product overviewMP2364 product overview MPS
25% MP28372 MP28372 product overviewMP28372 product overview MPS TSSOP-20, SOIC-16
25% MP29373 MP29373 product overviewMP29373 product overview MPS TSSOP-20
25% BD9E151 BD9E151 product overviewBD9E151 product overview Rohm VSON-8
50% LM2590HV LM2590HV product overviewLM2590HV product overview Texas Instruments TO-263, TO-220-7
50% LM2590HV-AQ-Q1 LM2590HV-AQ-Q1 product overviewLM2590HV-AQ-Q1 product overview Texas Instruments TO-263, TO-220-7
50% LMR14206 LMR14206 product overviewLMR14206 product overview Texas Instruments SOT23-6
50% XC9246 XC9246 product overviewXC9246 product overview Torex USP-6, SOT26-6
50% XC9247 XC9247 product overviewXC9247 product overview Torex USP-6, SOT26-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3503.

V-IN max. 20 V, I-OUT 1.2 A, V-OUT min. 0.78 V, Frequency typ. 2200 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744025001 1.2 2.6 3.0 36.00 2.8 x 2.8 x 3
74402800082 0.8 2.0 1.6 53.00 2.8 x 2.8 x 1.2
744028001 1.0 1.8 1.5 65.00 2.8 x 2.8 x 1.2
74402900082 0.8 2.4 1.8 36.00 2.8 x 2.8 x 1.5
744029001 1.0 2.2 1.6 45.00 2.8 x 2.8 x 1.5
7440300068 0.7 1.3 1.5 0.06 3.3 x 3.5 x 1.05
744031010 1.0 2.0 1.6 26.00 3.8 x 3.8 x 1.8
74404024010 1.0 2.2 2.6 37.00 2.5 x 2 x 1.2
74404032010 1.0 2.2 3.0 33.00 3 x 3 x 1.5
744042001 1.0 2.7 2.6 20.00 4.8 x 4.8 x 2
7440430012 1.2 3.1 2.8 15.00 4.8 x 4.8 x 3
74438321010 1.0 1.3 2.5 163.00 2.5 x 2 x 0.6
74479262210 1.0 1.2 1.7 170.00 1.6 x 0.8 x 0.8
74479275210 1.0 1.8 2.1 69.00 2 x 1.25 x 1
74479276210 1.0 2.0 2.5 65.00 2 x 1.6 x 1
74479876168 0.7 1.8 1.7 60.00 2 x 1.6 x 1
74479876210 1.0 1.5 1.5 70.00 2 x 1.6 x 1
74479889210 1.0 2.0 2.0 85.00 2.5 x 2 x 1.2
74479899210 1.0 2.3 2.5 50.00 3.2 x 2.6 x 1.2
74479976210 1.0 1.8 2.4 75.00 2 x 1.6 x 0.5
74479977182 0.8 2.0 2.0 90.00 2 x 1.6 x 0.9
78438321010 1.0 1.3 2.5 163.00 2.5 x 2 x 0.6
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