MAX1921-3 Buck Converter overview

Description

Manufacturer
 
Category
Sub-Category

MAX1921-3 is a 5.50 V sync Buck Converter from with 0.40 A output current. The maximum 5.50 V input voltage can be regulated down into a 3.00 V to 3.00 V output voltage.

It requires are a typical inductor size of 4.70 µH, a typical external component count of 5 and achieves a peak efficiency of 95 %. Further MAX1921-3 characteristics are a fixed 1200 kHz switching frequency and 1 available package option(s): SOT23-6 .

For the MAX1921-3 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. 2.00 V
V-IN max. 5.50 V
I-OUT? 0.40 A
V-OUT min. 3.00 V
V-OUT max. 3.00 V
V-OUT 3.000 V
V-OUT programmable no
sync/non-sync sync
Frequency typ. 1200 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. 300 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min.
Junction max. 150 °C
thermal shutdown typ.
Inductor size typ. 4.70 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Buck
Peak Efficiency 95 %
Component count min. 5
current limit adjustable no
Nr.of packages 1
CSP
SC70
SOT SOT23-6
MSOP
QFN/DFN
SO/SOIC
SOP
DIP
TO
DDPAK

MAX1921-3 Datasheet

Link to the most up-to-date MAX1921-3 datasheet and the product page for EVM, tools and support information.

MAX1921-3

MAX1921-3 Sample stock and distributor price breaks

MAX1921-3 prices and online available distributors.

OEMSecrets.com
findchips.com

Available Distributors with stock: 4

DIGI-KEY (9)

ProductStockPriceBuy
MAX1921EUT15+T2500
25001.46 USD
Buy Now
MAX1921EUT15+T5000
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.94 USD
Buy Now
MAX1921EUT15+T5000
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.94 USD
Buy Now
MAX1921EUT30+T2500
25001.46 USD
Buy Now
MAX1921EUT30+T4921
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.94 USD
Buy Now
MAX1921EUT30+T4921
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.94 USD
Buy Now
MAX1921EUT25+T5992
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.52 USD
Buy Now
MAX1921EUT33+T2454
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.52 USD
Buy Now
MAX1921EUT18+T408
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.52 USD
Buy Now
MAXREFDES117#0
120.00 USD
1019.00 USD
Buy Now
MAX1921EVKIT0
00.00 USD
Buy Now
MAX1921EUT18+TG1040
00.00 USD
Buy Now

Element14 (1)

ProductStockPriceBuy
MAX1921EUT33+T2476
14.45 USD
104.18 USD
253.43 USD
1002.98 USD
2502.85 USD
10002.63 USD
Buy Now

FARNELL-ELEMENT14 (2)

ProductStockPriceBuy
MAX1921EUT33+T2476Buy Now
MAX1921EUT33+T2476Buy Now

Mouser-Electronics (4)

ProductStockPriceBuy
MAX1921EUT33+T2497
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.55 USD
Buy Now
MAX1921EUT18+T1990
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.55 USD
Buy Now
MAX1921EUT25+T1487
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.55 USD
Buy Now
MAX1921EUT15+T2400
13.22 USD
103.03 USD
252.43 USD
502.31 USD
1002.12 USD
2502.01 USD
5001.94 USD
25001.55 USD
Buy Now
MAX1921EUT30+TNone
25001.55 USD
Buy Now

Available Distributors without stock: 3

AVNET-AMERICAS (0)

ProductStockPriceBuy
MAX1921EUT15+0
00.00 USD
Buy Now
MAX1921EUT15+T0
25001.74 USD
50001.67 USD
100001.60 USD
150001.54 USD
250001.52 USD
Buy Now
MAX1921EUT180
00.00 USD
Buy Now
MAX1921EUT18+0
00.00 USD
Buy Now
MAX1921EUT18+T0
25001.74 USD
50001.67 USD
100001.60 USD
150001.54 USD
250001.52 USD
Buy Now
MAX1921EUT25+0
00.00 USD
Buy Now
MAX1921EUT25+T0
25001.74 USD
50001.67 USD
100001.60 USD
150001.54 USD
250001.52 USD
Buy Now
MAX1921EUT30+0
00.00 USD
Buy Now
MAX1921EUT30+T0
25001.74 USD
50001.67 USD
100001.60 USD
150001.54 USD
250001.52 USD
Buy Now
MAX1921EUT33+0
00.00 USD
Buy Now
MAX1921EUT33+T0
25001.74 USD
50001.67 USD
100001.60 USD
150001.54 USD
250001.52 USD
Buy Now

AVNET-ASIA (0)

ProductStockPriceBuy
MAX1921EUT18+T0
25001.70 USD
50001.61 USD
100001.55 USD
150001.51 USD
250001.49 USD
Buy Now

AVNET-EUROPE (0)

ProductStockPriceBuy
MAX1921EUT15+T0Buy Now
MAX1921EUT18+T0Buy Now
MAX1921EUT25+T0Buy Now
MAX1921EUT30+T0Buy Now
MAX1921EUT33+T0Buy Now

Available Distributors with stock: 0

no online Distributor with MAX1921 stock available

List of equivalents and alternatives

The following DC/DC Buck Converter are similar to MAX1921-3. Optional, compare MAX1921-3 side-by-side with other Buck Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% ADP2108-3,0 ADP2108-3,0 product overviewADP2108-3,0 product overview Analog Devices TSOT23-5, CSP-5
0% ADP2138-3,0 ADP2138-3,0 product overviewADP2138-3,0 product overview Analog Devices WLCSP-6
0% ADP2139-3,0 ADP2139-3,0 product overviewADP2139-3,0 product overview Analog Devices WLCSP-6
0% TPS62233 TPS62233 product overviewTPS62233 product overview Texas Instruments SON-6
0% RP504x-3.0 RP504x-3.0 product overviewRP504x-3.0 product overview Ricoh DFN-6, SOT23-5
0% RP508x-3.0 RP508x-3.0 product overviewRP508x-3.0 product overview Ricoh DFN-6
0% RP509Z-2-3.0 RP509Z-2-3.0 product overviewRP509Z-2-3.0 product overview Ricoh WLCSP-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of MAX1921-3.

V-IN max. 5.5 V, I-OUT 0.4 A, V-OUT min. 3 V, Frequency typ. 1200 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
744028006 6.8 0.8 0.6 325.00 2.8 x 2.8 x 1.2
744029006 6.8 0.8 0.7 250.00 2.8 x 2.8 x 1.5
744031006 6.8 0.9 0.8 135.00 3.8 x 3.8 x 1.8
744032006 6.8 0.4 1.1 320.00 3.2 x 2.5 x 2.3
74404024068 6.8 0.9 1.0 300.00 2.5 x 2 x 1.2
74404032068 6.8 1.2 0.9 120.00 3 x 3 x 1.5
744042008 8.2 1.4 1.1 100.00 4.8 x 4.8 x 2
744043008 8.2 1.3 1.1 90.00 4.8 x 4.8 x 3
7440680082 8.2 1.4 1.1 142.00 8 x 8 x 1.2
74479889268 6.8 0.8 0.7 500.00 2.5 x 2 x 1.2
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