MAX1742-1.5 Buck Converter overview
Description
MAX1742-1.5 is a 5.50 V sync Buck Converter from with 1.00 A output current. The maximum 5.50 V input voltage can be regulated down into a 1.50 V to 1.50 V output voltage.
It requires are a typical inductor size of 1.50 µH, a typical external component count of 9 and achieves a peak efficiency of 95 %. Further MAX1742-1.5 characteristics are a fixed 1000 kHz switching frequency and 1 available package option(s): QSOP-16 .
Parameter overview and features with replacement search
For the MAX1742-1.5 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.
Parameter | Value | Replacement Search Filter |
V-IN min. | 3.00 V | |
V-IN max. | 5.50 V | |
I-OUT? | 1.00 A | |
V-OUT min. | 1.50 V | |
V-OUT max. | 1.50 V | |
V-OUT | 1.500 V | |
V-OUT programmable | ![]() |
|
sync/non-sync | sync | |
Frequency typ. | 1000 kHz | |
Frequency | fixed | |
Frequency selectable | ||
ext.clock sync. | ![]() |
|
Frequency adj./ ext.clock min. | ||
Frequency adj./ ext.clock max | ||
Softstart | ![]() |
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Softstart adjustable | ![]() |
|
Tracking | ![]() |
|
PG/Power OK | ![]() |
|
Quiescent current max. | 15 µA | |
Operating min. | -40 °C | |
Operating max. | 85 °C | |
Junction min. | ||
Junction max. | ||
thermal shutdown typ. | 160 °C | |
Inductor size typ. | 1.50 µH | |
Inductor suggested by Würth Elektronik | ||
Automotive AEC-Q100 | ![]() |
|
Light-Load-Mode | ![]() |
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Topology | Buck | |
Peak Efficiency | 95 % | |
Component count min. | 9 | |
current limit adjustable | ![]() |
|
Nr.of packages | 1 | |
CSP | ||
SC70 | ||
SOT | ||
MSOP | ||
QFN/DFN | ||
SO/SOIC | ||
SOP | QSOP-16 | |
DIP | ||
TO | ||
DDPAK |
MAX1742-1.5 Datasheet
Link to the most up-to-date MAX1742-1.5 datasheet and the product page for EVM, tools and support information.
MAX1742-1.5 Sample stock and distributor price breaks
MAX1742-1.5 prices and online available distributors.


Available Distributors with stock: 2
Digi-Key (1)
Available Distributors without stock: 3
Avnet America (0)
Future Electronics (0)
Rutronik (0)
Available Distributors with stock: 5
Digi-Key
Product | Stock | Price | Buy | ||||||||||||
MAX1742EEE+ | 522 |
| Buy Now | ||||||||||||
MAX1742EEE+T | 0 |
| Buy Now | ||||||||||||
MAX17428GTJ+ | 0 | Buy Now | |||||||||||||
MAX17428GTJ+G40 | 0 | Buy Now | |||||||||||||
MAX17428GTJ+T | 0 | Buy Now | |||||||||||||
MAX17428GTJ+TG40 | 0 | Buy Now |
Rochester Electronics
Mouser Electronics
Bristol Electronics
Quest Components
Available Distributors without stock: 2
Avnet
Future Electronics
List of equivalents and alternatives
The following DC/DC Buck Converter are similar to MAX1742-1.5. Optional, compare MAX1742-1.5 side-by-side with other Buck Converter via the Comparison function.
Variation | Compare | Product | Manufacturer | Package | |
0% | ADP2105-1,5 | ![]() |
Analog Devices | QFN-16 | |
0% | ADP2106-1,5 | ![]() |
Analog Devices | QFN-16 | |
0% | ADP2107-1,5 | ![]() |
Analog Devices | QFN-16 | |
0% | MAX1842-1.5 | ![]() |
Maxim | QSOP-16 | |
0% | RP506x-D-E-1.5 | ![]() |
Ricoh | DFN-10 | |
0% | RP506x-A-B-1.5 | ![]() |
Ricoh | DFN-10 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of MAX1742-1.5.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
744025002 | 2.2 | 1.8 | 2.4 | 57.00 | 2.8 x 2.8 x 3 | |
744025003 | 3.3 | 1.5 | 1.8 | 85.00 | 2.8 x 2.8 x 3 | |
744031002 | 2.5 | 1.5 | 1.3 | 50.00 | 3.8 x 3.8 x 1.8 | |
74404024022 | 2.2 | 1.8 | 2.0 | 80.00 | 2.5 x 2 x 1.2 | |
74404024033 | 3.3 | 1.4 | 1.3 | 120.00 | 2.5 x 2 x 1.2 | |
74404032022 | 2.2 | 1.8 | 1.7 | 50.00 | 3 x 3 x 1.5 | |
74404032033 | 3.3 | 1.5 | 1.5 | 70.00 | 3 x 3 x 1.5 | |
74404041033 | 3.3 | 1.8 | 2.1 | 69.00 | 4 x 4 x 1.2 | |
7440420027 | 2.7 | 2.0 | 2.2 | 47.00 | 4.8 x 4.8 x 2 | |
744042003 | 3.3 | 2.0 | 1.8 | 50.00 | 4.8 x 4.8 x 2 | |
7440420039 | 3.9 | 1.8 | 1.7 | 60.00 | 4.8 x 4.8 x 2 | |
7440430022 | 2.2 | 2.5 | 2.4 | 27.00 | 4.8 x 4.8 x 3 | |
7440430027 | 2.7 | 2.4 | 2.0 | 25.00 | 4.8 x 4.8 x 3 | |
744043003 | 3.3 | 2.2 | 1.8 | 30.00 | 4.8 x 4.8 x 3 | |
7440430039 | 3.9 | 1.7 | 1.7 | 50.00 | 4.8 x 4.8 x 3 | |
7440450039 | 3.9 | 1.3 | 2.5 | 112.00 | 4.5 x 3.2 x 2.9 | |
744052003 | 3.0 | 2.2 | 2.4 | 40.00 | 5.8 x 5.8 x 2 | |
7440520039 | 3.9 | 2.0 | 2.1 | 50.00 | 5.8 x 5.8 x 2 | |
744053003 | 3.0 | 2.8 | 2.5 | 20.00 | 5.8 x 5.8 x 3 | |
744062003 | 3.3 | 2.8 | 2.5 | 20.00 | 6.8 x 6.8 x 2.5 | |
7440680027 | 2.7 | 2.2 | 1.9 | 52.00 | 8 x 8 x 1.2 | |
7440680033 | 3.3 | 2.0 | 1.8 | 61.00 | 8 x 8 x 1.2 | |
7440690033 | 3.3 | 2.6 | 2.3 | 42.00 | 8 x 8 x 1.5 | |
74438322022 | 2.2 | 1.3 | 2.2 | 252.00 | 2.5 x 2 x 0.8 | |
74438323022 | 2.2 | 1.3 | 2.5 | 147.00 | 2.5 x 2 x 1 | |
74438323033 | 3.3 | 1.3 | 2.1 | 220.00 | 2.5 x 2 x 1 | |
74438343022 | 2.2 | 1.1 | 2.5 | 225.00 | 2.5 x 1.6 x 0.6 | |
74479275222 | 2.2 | 1.3 | 1.7 | 166.00 | 2 x 1.25 x 1 | |
74479276222 | 2.2 | 1.4 | 1.8 | 135.00 | 2 x 1.6 x 1 | |
74479276222C | 2.2 | 1.6 | 2.5 | 112.00 | 2 x 1.25 x 1 | |
74479287222 | 2.2 | 1.5 | 2.5 | 132.00 | 2.5 x 2 x 1 | |
74479888222 | 2.2 | 1.2 | 1.4 | 200.00 | 2.5 x 2 x 1 | |
74479889222 | 2.2 | 1.3 | 1.7 | 250.00 | 2.5 x 2 x 1.2 | |
74479889233 | 3.3 | 1.3 | 1.3 | 250.00 | 2.5 x 2 x 1.2 | |
78438322022 | 2.2 | 1.3 | 2.2 | 252.00 | 2.5 x 2 x 0.8 | |
78438323022 | 2.2 | 1.3 | 2.5 | 147.00 | 2.5 x 2 x 1 | |
78438323033 | 3.3 | 1.3 | 2.1 | 220.00 | 2.5 x 2 x 1 |