MAX1945 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

MAX1945 is a 5.50 V non-sync Buck Converter from with 6.00 A output current. The maximum 5.50 V input voltage can be regulated down into a 0.80 V to 4.50 V output voltage.

It requires are a typical inductor size of 1.00 µH, a typical external component count of 8 and achieves a peak efficiency of 95 %. Further MAX1945 characteristics are a fixed 500 kHz switching frequency and 1 available package option(s): TSSOP-EP-28 .

For the MAX1945 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. 2.60 V
V-IN max. 5.50 V
I-OUT? 6.00 A
V-OUT min. 0.80 V
V-OUT max. 4.50 V
V-OUT adjustable V
V-OUT programmable no
sync/non-sync non-sync
Frequency typ. 500 kHz
Frequency fixed
Frequency selectable
ext.clock sync. yes
Frequency adj./ ext.clock min. 400 kHz
Frequency adj./ ext.clock max 600 kHz
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
Quiescent current max. 20000 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max.
thermal shutdown typ. 165 °C
Inductor size typ. 1.00 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode no
Topology Buck
Peak Efficiency 95 %
Component count min. 8
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP TSSOP-EP-28
DIP
TO
DDPAK

MAX1945 Datasheet

Link to the most up-to-date MAX1945 datasheet and the product page for EVM, tools and support information.

MAX1945

MAX1945 Sample stock and distributor price breaks

MAX1945 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 4

Digi-Key (2)

ProductStockPriceBuy
MAX1945REUI+77
112.50 USD
1011.88 USD
258.66 USD
508.23 USD
1005.82 USD
2505.72 USD
Buy Now
MAX1945SEUI+100
112.51 USD
1011.88 USD
258.66 USD
508.23 USD
1005.82 USD
Buy Now
MAX1945SEUI+T0
25004.34 USD
Buy Now
MAX1945REUI+T0
25004.35 USD
Buy Now

Element14 (1)

ProductStockPriceBuy
MAX1945REUI+2
119.15 USD
1018.19 USD
2513.27 USD
509.71 USD
1009.59 USD
2508.43 USD
Buy Now

Farnell Element14 (1)

ProductStockPriceBuy
MAX1945REUI+2Buy Now

Mouser Electronics (2)

ProductStockPriceBuy
MAX1945SEUI+41
112.83 USD
1012.18 USD
258.88 USD
506.50 USD
1006.41 USD
2506.11 USD
10005.98 USD
Buy Now
MAX1945REUI+56
112.81 USD
1012.18 USD
258.88 USD
506.50 USD
1006.41 USD
2505.98 USD
Buy Now
MAX1945REUI+TNone
25004.64 USD
Buy Now
MAX1945SEUI+TNone
25004.61 USD
Buy Now

Available Distributors without stock: 3

Avnet America (0)

ProductStockPriceBuy
MAX1945REUI+0
1006.29 USD
2006.19 USD
3005.99 USD
5005.79 USD
10005.69 USD
Buy Now
MAX1945REUI/GG80
00.00 USD
Buy Now
MAX1945REUI+T0
25004.89 USD
50004.69 USD
100004.59 USD
150004.49 USD
250004.39 USD
Buy Now
MAX1945SEUI+0
1006.29 USD
2006.19 USD
3005.99 USD
5005.79 USD
10005.69 USD
Buy Now
MAX1945SEUI+T0
25004.79 USD
50004.69 USD
100004.59 USD
150004.39 USD
250004.39 USD
Buy Now

Avnet Europe (0)

ProductStockPriceBuy
MAX1945REUI+0Buy Now
MAX1945SEUI+T0Buy Now

Rutronik (0)

ProductStockPriceBuy
nnBuy Now

Available Distributors with stock: 8

Digi-Key

ProductStockPriceBuy
MAX1945SEUI+ 100
1004.96 €
507.02 €
257.39 €
1010.14 €
110.67 €
Buy Now
MAX1945REUI+ 77
2504.88 €
1004.96 €
507.02 €
257.39 €
1010.13 €
110.66 €
Buy Now
MAX1945SEUI+T 0
25003.70 €
Buy Now
MAX1945REUI+T 0
25003.71 €
Buy Now
show stock=0hide stock=0

Newark element14

ProductStockPriceBuy
MAX1945REUI+ 2
112.50 $
1011.88 $
258.66 $
506.34 $
1006.26 $
2505.50 $
Buy Now

Rochester Electronics

ProductStockPriceBuy
MAX1945SEUI+ 1129
10007.27 $
5007.65 $
1007.96 $
258.30 $
18.94 $
Buy Now

Mouser Electronics

ProductStockPriceBuy
MAX1945SEUI+ 41
112.51 $
1011.88 $
258.66 $
506.34 $
1006.26 $
2505.96 $
10005.61 $
Buy Now
MAX1945REUI+ 56
112.50 $
1011.88 $
258.66 $
506.34 $
1006.26 $
2505.50 $
Buy Now
MAX1945REUI+T 0
25004.26 $
Buy Now
MAX1945SEUI+T 0
25004.25 $
Buy Now
MAX1945REUI 0 Buy Now
MAX1945REUI-T 0 Buy Now
MAX1945REUI/GH9 0 Buy Now
MAX1945SEUI 0 Buy Now
MAX1945SEUI-T 0 Buy Now
show stock=0hide stock=0

America II Electronics

ProductStockPriceBuy
MAX1945SEUI-T 4160 Buy Now

Quest Components

ProductStockPriceBuy
MAX1945REUI 69
424.25 $
54.91 $
19.81 $
Buy Now

element14 Asia-Pacific

ProductStockPriceBuy
MAX1945REUI+ 2
115.32 $
1014.55 $
2510.61 $
507.76 $
1007.67 $
2506.74 $
Buy Now

Farnell element14

ProductStockPriceBuy
MAX1945REUI+ 2
18.97 GBP
108.52 GBP
256.21 GBP
504.68 GBP
1004.28 GBP
Buy Now

Available Distributors without stock: 1

Avnet

ProductStockPriceBuy
MAX1945REUI+ 0
1006.29 $
2006.19 $
3005.99 $
5005.79 $
10005.69 $
Buy Now
MAX1945REUI+ 0
110.39 €
109.89 €
257.19 €
506.79 €
1005.09 €
5005.09 €
10004.99 €
Buy Now
MAX1945SEUI+ 0
1006.29 $
2006.19 $
3005.99 $
5005.79 $
10005.69 $
Buy Now
MAX1945REUI+T 0
25004.89 $
50004.69 $
100004.59 $
150004.49 $
250004.39 $
Buy Now
MAX1945SEUI+T 0
25004.89 €
50004.69 €
100004.49 €
150004.19 €
250003.89 €
Buy Now
MAX1945SEUI+T 0
25004.79 $
50004.69 $
100004.59 $
150004.39 $
250004.39 $
Buy Now
MAX1945REUI/GG8 0

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to MAX1945. Optional, compare MAX1945 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
10% MP2380 MP2380 product overviewMP2380 product overview MPS SOIC-8

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of MAX1945.

V-IN max. 5.5 V, I-OUT 6 A, V-OUT min. 0.8 V, Frequency typ. 500 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744040630082 0.8 6.0 9.5 10.00 6 x 6 x 2.8
7440710082 0.8 7.3 8.0 7.00 8 x 8 x 4.6
744310095 1.0 11.0 13.0 6.20 7 x 6.9 x 3.3
744314076 0.8 15.5 15.0 2.25 7 x 6.9 x 5
744316068 0.7 12.8 13.5 4.00 5.5 x 5.3 x 4.3
744373240056 0.6 6.0 10.5 13.50 4.45 x 4.06 x 2
744373340068 0.7 6.2 14.0 11.00 5.7 x 5.2 x 2
744373360068 0.7 8.0 15.0 10.00 5.7 x 5.2 x 3
744383560056 0.6 8.5 10.8 7.00 4.1 x 4.1 x 2.1
744383560068 0.7 8.2 9.4 7.50 4.1 x 4.1 x 2.1
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