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Description
STMICROELECTRONICS L6561D DC-DC Switching Regulator, Adjustable, 18V in, 400mA out, SOIC-8The L6561D is a transition mode Power Factor Corrector. It is fully compatible with the standard version, it has a superior performant multiplier making the device capable of working in wide input voltage range applications with an excellent THD. Furthermore the start up current has been reduced at few tens of mA and a disable function has been implemented on the ZCD pin, guaranteeing lower current consumption in standby mode. Realized in mixed BCD
The L6561D is a transition mode Power Factor Corrector. It is fully compatible with the standard version, it has a superior performant multiplier making the device capable of working in wide input voltage range applications with an excellent THD. Furthermore the start up current has been reduced at few tens of mA and a disable function has been implemented on the ZCD pin, guaranteeing lower current consumption in standby mode. Realized in mixed BCD technology, the chip gives the benefits micro power start up current 1% precision internal reference voltage soft output over voltage protection, no need for external low pass filter on the current sense very low operating quiescent current minimizes power dissipation. The totem pole output stage is capable of driving a Power MOS or IGBT with source and sink currents of ±400mA.
- Very precise adjustable output over-voltage protection
- Very low operating supply current (4mA typical)
- Internal start-up timer
- Current sense filter on chip
- Disable function
- Transition mode operation
Applications
Power Management
Product details
| Output Current | 400mA |
| DC / DC Converter IC Case | SOIC |
| No. of Outputs | 1Outputs |
| Automotive Qualification Standard | - |
| Input Voltage Max | 18V |
| Packaging | Cut Tape |
| Product Range | - |
| Operating Temperature Max | 150°C |
| No. of Pins | 8Pins |
| MSL | - |
Other details
| Brand | STMICROELECTRONICS |
| Part Number | L6561D |
| Quantity | Each |
| Technical Data Sheet EN | |
| Product Change Notice EN |
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4.5 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Side sleepers rejoice!
Size: Queen Size: 27.6"L x 15.7"W soft, Color: White
I have spent hundreds of dollars on pillows. I am primarily a side sleeper and every few years I find myself waking up with a "crick" in my neck accompanied by pain and tension. I have had this pillow for only two nights and I am leaving a positive review. It is firmer than one would expect based on first appearance and the "press" test. The surface stays cool and I can sleep any which way and I am still comfortable. Definitely recommend!
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Reviewed in the United States on March 1, 2026
★★★★★ 4
Too Soft for Him, Just Right for Me
Size: Queen Size: 27.6"L x 15.7"W soft, Color: White
My husband purchased this for himself but found it to be too soft for his preference. I decided to try it, and it worked well for me. While I agree it’s not as firm as either of us typically like, it still provided adequate support, and the shape retention held up nicely. Overall, it wasn’t a match for him, but it worked just fine for my needs.
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Reviewed in the United States on January 29, 2026
★★★★★ 5
Yes
Size: Queen Size: 27.6"L x 15.7"W soft, Color: White
Great for a side sleeper. Firm enough that it doesn’t collapse but soft and cool
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Reviewed in the United States on April 1, 2026
★★★★★ 5
Love this pillow!
Size: Queen Size: 27.6"L x 15.7"W soft, Color: White
I sleep on my side and this pillow is great! I also enjoy the cooling aspect. I forgot my pillow at a hotel and had another one ordered before I got home.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Life-Changing Comfort – Best Pillow Ever!
Size: Queen Size: 27.6"L x 15.7"W Medium, Color: White
I can’t say enough good things about the Releep Memory Foam Pillow—it’s an absolute game-changer! From the very first night, I noticed a huge improvement in my sleep quality and neck support.
One of the best features is the dual-sided design—a firm side for extra support and a cooling soft side that feels like sleeping on a cloud. I love being able to switch between them depending on how I’m feeling. The memory foam provides just the right balance of support and comfort, cradling my neck perfectly and keeping my spine aligned. No more tossing and turning or waking up with a stiff neck!
The cooling side is a dream! It actually stays cool throughout the night, which is a lifesaver for hot sleepers like me. I used to constantly flip my pillow looking for a cool spot, but not anymore.
If you suffer from neck pain, tension, or just want a better night’s sleep, this pillow is 100% worth it. I’ve tried so many pillows over the years, and nothing comes close to this one. I wake up feeling refreshed, pain-free, and ready to take on the day. Highly, HIGHLY recommend!
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Reviewed in the United States on March 10, 2025