R1223N-18-B Buck Controller overview
Description
R1223N-18-B is a 1 channel, 1 phase non-sync Buck Controller. The maximum input voltage ranges from 2.30 V to 13.20 V and output current goes up to 1.00 A.
The Controller features fixed 500 kHz switching frequency which results in a typical inductor size of 27.0 uH and a peak efficiency of 93 %. The R1223N-18-B is available in 1 package option(s): SOT23-5 .
Parameter and features overview
Parameter | Value | Replacement Search Filter |
Nr. of Channel | 1 | |
V-IN min. | 2.30 V | |
V-IN max. | 13.20 V | |
I-OUT? | 1.00 A | |
V-OUT min. | 1.80 V | |
V-OUT max. | 1.80 V | |
V-OUT | 2 | |
V-OUT programmable | ![]() |
|
sync/non-sync | non-sync | |
Frequency typ. | 500 kHz | |
Frequency adj. | fixed | |
Frequency adj. min. | ||
Frequency adj. max. | ||
ext.clock sync. | ![]() |
|
ext.clock Frequency min. | ||
ext.clock Frequency max. | ||
Softstart | ![]() |
|
Softstart adjustable | ![]() |
|
Tracking | ![]() |
|
Power Good (PG) | ![]() |
|
Enable | ![]() |
|
Operating min. | -40 °C | |
Operating max. | 85 °C | |
Junction min. | ||
Junction max. | ||
thermal shutdown typ. | ||
Inductor size typ. | 27.0 uH | |
Automotive AEC-Q100 | ![]() |
|
Light-Load Mode | ![]() |
|
Single/ Multiphase | single | |
Nr. of Phases | 1 | |
Peak Efficiency | 93 % | |
component count min. | 6 | |
current limit adjustable | ![]() |
|
Nr.of package options | 1 | |
CSP | ||
SOT | SOT23-5 | |
MSOP | ||
QFN/DFN | ||
SO/SOIC | ||
SOP | ||
DIP |
R1223N-18-B Datasheet
Link to the most up-to-date R1223N-18-B datasheet and the product page for EVM, tools and support information.
R1223N-18-B inventory, samples and price


Available Distributors with stock: 2
Chip-One-Stop (2)
Mouser-Electronics (1)
Product | Stock | Price | Buy | ||||||||||||||
R1223N | None | Buy Now | |||||||||||||||
R1223N332H-TR-FE | 50 |
| Buy Now | ||||||||||||||
R1223N332F-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N332E-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N152H-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N182B-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N252A-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N502A-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N332A-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N152F-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N332G-TR-FE | None |
| Buy Now | ||||||||||||||
R1223N182H-TR-FE | None |
| Buy Now |
Available Distributors with stock: 0
Table with equivalents and alternatives
The following Buck Controller are similar to R1223N-18-B. Or, compare R1223N-18-B side-by-side with other Buck Controller via the Comparison function.
Variation | Compare | Product | Manufacturer | Package | |
0% | R1223N-18-A | ![]() |
Ricoh | SOT23-5 | |
0% | R1225N-18-A | ![]() |
Ricoh | SOT23-5 | |
0% | R1225N-18-B | ![]() |
Ricoh | SOT23-5 | |
0% | R1225N-18-J | ![]() |
Ricoh | SOT23-5 | |
0% | R1223N-1.8A | ![]() |
Ricoh | SOT23-5 | |
0% | R1223N-1.8B | ![]() |
Ricoh | SOT23-5 | |
0% | R1224N-E-1.8 | ![]() |
Ricoh | SOT23-5 | |
0% | R1224N-F-1.8 | ![]() |
Ricoh | SOT23-5 | |
0% | R1224N-L-1.8 | ![]() |
Ricoh | SOT23-5 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of R1223N-18-B.
Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
744025006 | 6.8 | 1.1 | 1.3 | 142.00 | 2.8 x 2.8 x 3 | |
74404042068 | 6.8 | 1.5 | 1.8 | 98.00 | 4 x 4 x 1.8 | |
74404042100 | 10.0 | 1.2 | 1.5 | 150.00 | 4 x 4 x 1.8 | |
74404052068 | 6.8 | 1.9 | 2.4 | 82.70 | 5 x 5 x 2 | |
74404052075 | 7.5 | 1.7 | 2.1 | 96.80 | 5 x 5 x 2 | |
74404052100 | 10.0 | 1.6 | 2.0 | 109.00 | 5 x 5 x 2 | |
74404063100 | 10.0 | 2.0 | 2.2 | 72.00 | 6 x 6 x 2.8 | |
744042006 | 6.8 | 1.5 | 1.3 | 80.00 | 4.8 x 4.8 x 2 | |
744043006 | 6.8 | 1.3 | 1.3 | 80.00 | 4.8 x 4.8 x 3 | |
744045006 | 6.8 | 1.1 | 1.6 | 160.00 | 4.5 x 3.2 x 2.9 | |
744045008 | 8.2 | 1.0 | 1.6 | 200.00 | 4.5 x 3.2 x 2.9 | |
744052007 | 7.5 | 1.4 | 1.5 | 70.00 | 5.8 x 5.8 x 2 | |
744052009 | 9.0 | 1.3 | 1.4 | 90.00 | 5.8 x 5.8 x 2 | |
744052100 | 10.0 | 1.1 | 1.3 | 105.00 | 5.8 x 5.8 x 2 | |
744053008 | 8.2 | 2.1 | 1.6 | 50.00 | 5.8 x 5.8 x 3 | |
744053100 | 10.0 | 1.5 | 1.4 | 60.00 | 5.8 x 5.8 x 3 | |
744062007 | 7.5 | 1.7 | 1.6 | 50.00 | 6.8 x 6.8 x 2.5 | |
744062100 | 10.0 | 1.6 | 1.4 | 53.00 | 6.8 x 6.8 x 2.5 | |
7440680068 | 6.8 | 1.4 | 1.2 | 127.00 | 8 x 8 x 1.2 | |
7440690068 | 6.8 | 1.8 | 1.7 | 88.00 | 8 x 8 x 1.5 | |
7440690082 | 8.2 | 1.7 | 1.5 | 99.00 | 8 x 8 x 1.5 | |
7440690100 | 10.0 | 1.6 | 1.3 | 112.00 | 8 x 8 x 1.5 | |
7440700068 | 6.8 | 2.4 | 1.8 | 56.00 | 8 x 8 x 2 | |
7440700082 | 8.2 | 2.2 | 1.7 | 70.50 | 8 x 8 x 2 | |
7440700100 | 10.0 | 2.0 | 1.6 | 78.00 | 8 x 8 x 2 | |
74408941068 | 6.8 | 1.1 | 2.1 | 190.00 | 4.8 x 4.8 x 2.1 | |
74408941078 | 7.8 | 1.1 | 1.9 | 230.00 | 4.8 x 4.8 x 2.1 | |
74408942068 | 6.8 | 1.5 | 2.4 | 110.00 | 4.8 x 4.8 x 3.1 | |
74408942082 | 8.2 | 1.4 | 2.2 | 113.00 | 4.8 x 4.8 x 3.1 | |
74408942100 | 10.0 | 1.4 | 2.1 | 125.00 | 4.8 x 4.8 x 3.1 | |
74408943082 | 8.2 | 1.8 | 2.2 | 70.00 | 4.8 x 4.8 x 4.1 | |
74408943100 | 10.0 | 1.7 | 2.1 | 82.00 | 4.8 x 4.8 x 4.1 | |
74437321068 | 6.8 | 1.3 | 2.4 | 300.00 | 4.45 x 4.06 x 1.2 | |
74437321082 | 8.2 | 1.2 | 2.1 | 313.00 | 4.45 x 4.06 x 1.2 | |
74437321100 | 10.0 | 1.1 | 2.0 | 410.00 | 4.45 x 4.06 x 1.2 | |
74437324100 | 10.0 | 1.5 | 2.4 | 215.00 | 4.45 x 4.06 x 2 | |
74438335068 | 6.8 | 1.1 | 2.4 | 250.00 | 3 x 3 x 1.5 | |
74438336100 | 10.0 | 1.2 | 2.4 | 280.00 | 3 x 3 x 2 | |
744773068 | 6.8 | 1.5 | 2.1 | 76.00 | 4 x 4.5 x 3.5 | |
744773082 | 8.2 | 1.5 | 1.8 | 116.00 | 4 x 4.5 x 3.5 | |
74477310 | 10.0 | 1.5 | 1.7 | 118.00 | 4 x 4.5 x 3.5 | |
74477810 | 10.0 | 1.8 | 2.2 | 68.00 | 7.3 x 7.3 x 3.4 | |
7447785006 | 6.8 | 2.3 | 2.0 | 79.00 | 5.9 x 6.2 x 3.3 | |
744778510 | 10.0 | 1.9 | 1.6 | 100.00 | 5.9 x 6.2 x 3.3 | |
7447786006 | 6.8 | 2.5 | 2.3 | 62.00 | 5.9 x 6.2 x 5.1 | |
7447786008 | 8.2 | 2.3 | 2.1 | 66.00 | 5.9 x 6.2 x 5.1 | |
744778610 | 10.0 | 2.1 | 1.8 | 74.00 | 5.9 x 6.2 x 5.1 | |
744778910 | 10.0 | 1.8 | 2.2 | 64.00 | 7.3 x 7.3 x 3.5 | |
744779100 | 10.0 | 1.9 | 2.1 | 38.60 | 6 x 6 x 6.5 | |
78438335068 | 6.8 | 1.1 | 2.4 | 250.00 | 3 x 3 x 1.5 | |
784773068 | 6.8 | 1.5 | 2.1 | 76.00 | 4 x 4.5 x 3.5 | |
784773082 | 8.2 | 1.5 | 1.8 | 116.00 | 4 x 4.5 x 3.5 | |
78477310 | 10.0 | 1.5 | 1.7 | 118.00 | 4 x 4.5 x 3.5 | |
784778082 | 8.2 | 2.2 | 2.4 | 86.00 | 7.3 x 7.3 x 3.5 | |
784778100 | 10.0 | 1.9 | 2.2 | 105.00 | 7.3 x 7.3 x 3.5 |