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Description
MAXIM INTEGRATED PRODUCTS MAX1709EUI+ DC-DC Switching Boost (Step Up) Regulator, Adj., 700mV-5Vin, 3.3V-5V/4A out, 600 kHz, TSSOP-28The MAX1709EUI+ is a 4A, high frequency, step up DC to DC converter in 28 pin TSSOP package. This low noise DC to DC converter delivers up to 20W at a fixed (3. 3V or 5V) or adjustable (2. 5V to 5. 5V) output, using an on chip power MOSFET from +0. 7V to +5V supply. Fixed frequency PWM operation ensures that the switching noise spectrum is constrained to 600KHz fundamental and its harmonics allowing easy postfiltering for noise reduction. External
The MAX1709EUI+ is a 4A, high frequency, step-up DC to DC converter in 28 pin TSSOP package. This low noise DC to DC converter delivers up to 20W at a fixed (3.3V or 5V) or adjustable (2.5V to 5.5V) output, using an on-chip power MOSFET from +0.7V to +5V supply. Fixed frequency PWM operation ensures that the switching noise spectrum is constrained to 600KHz fundamental and its harmonics allowing easy postfiltering for noise reduction. External clock synchronization capability allows for even tighter noise spectrum control. Two control inputs (ONA, ONB (complementary)) allow simple push-on, push-off control through a single momentary pushbutton switch as well as conventional on/off logic control. It features programmable soft-start and current limit for design flexibility and optimum performance with batteries. It is used in local 2.5V to 3.3V or 5V conversion, local 3.3V to 5V conversion, 3.6V or 5V RF PAs in communications handsets, routers, servers, workstations and card racks.
- Integration reduces external component count to save space
- On-chip 10A power MOSFET
- 5V, 4A output from a 3.3V input
- Fixed 3.3V or 5V output voltage or adjustable (2.5V to 5.5V)
- Constant frequency reduces post-filtering, synchronized switching frequency (350KHz to 1000KHz)
- Lower power consumption extends battery life
- Quiescent power consumption is less than 1mW
- Internal oscillator frequency of 600KHz at VOUT = VCLK = +3.6V
- Maximum duty cycle of 94% at VOUT = VCLK = +3.6V
Applications
Power Management, Industrial
- :
- 5V
- :
- 4A
- :
- 1Outputs
- :
- 85°C
- :
- 28Pins
- :
- 5V
- :
- 3.3V
- :
- 700mV
- :
- -
- :
- Boost (Step Up)
- :
- -
- :
- TSSOP
- :
- 600kHz
- :
- Each
- :
- MSL 1 - Unlimited
Product details
| Input Voltage Max | 5V |
| Output Current | 4A |
| No. of Outputs | 1Outputs |
| Operating Temperature Max | 85°C |
| No. of Pins | 28Pins |
| Output Voltage Max | 5V |
| Output Voltage Min | 3.3V |
| Input Voltage Min | 700mV |
| Product Range | - |
| Topology | Boost (Step Up) |
| Automotive Qualification Standard | - |
| DC / DC Converter IC Case | TSSOP |
| Switching Frequency | 600kHz |
| Packaging | Each |
| MSL | MSL 1 - Unlimited |
Other details
| Brand | MAXIM INTEGRATED PRODUCTS |
| Part Number | MAX1709EUI+ |
| Quantity | Each |
| Technical Data Sheet EN |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.6 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
The glasses are made well
Color: Pearl Brown Tort, Size: 53-16-135
The glasses fit well and are made well. They are Great value for the money.
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Reviewed in the United States on November 24, 2024
★★★★★ 5
Hotel quality, budget friendly
Size: King, Style: Light
I’ve only used this for several nights. Overall I’m pretty happy with it, especially for the price. It is soft to the touch and has a nice, smooth feel. It’s lightweight but still provides enough warmth for mild to cool nights. I don’t like feeling weighed down when I sleep, so the light fill is actually a big plus for me. If you’re someone who sleeps hot, this is a solid choice. The corner tabs are super helpful. I paired it with a duvet cover and haven’t had issues with shifting or bunching. It also fits my bed well, though I could see it being a bit short on the sides if you have a very thick mattress. This is a great budget-friendly option and seems like it will be easy to maintain.
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Reviewed in the United States on September 19, 2025
★★★★★ 5
A Great Comforter for Everyday Use
Size: Full/Queen, Style: All-Season
I absolutely love this comforter! I love the fact it’s machine washable, and it held up really well after the first wash. It fluffed back up nicely, stayed soft, and didn’t lose its shape. It’s not too heavy but still cozy enough to keep you comfortable. For the price, the quality exceeded my expectations, and I am very happy with this purchase. I highly recommend 😊
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Reviewed in the United States on June 4, 2026
★★★★★ 5
Excellent down alternative insert
Size: Full/Queen, Style: All-Season
I purchased this down alternative for my Airbnb because we can easily wash it. I love that it is fluffy and warm and easy to put into the duvet. Price was great as well!!
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Feels luxury, I approve
Size: King, Style: Warm
I have purchased high end comforters/duvet inserts and this one is somehow my favorite. It's so thick and fluffy.
I was going to do the double duvet insert method to create an extra lush bed situation, but honestly it's not needed at all with this comforter! It poofs up wonderfully inside my duvet cover (king duvet, king insert) and it's like heaven. It's very cozy yet airy, and it moves well during the night and does not fee too heavy despite its weight.
This thing is definitely on the warm end and probably won't be suitable for Florida summers, but depending on how you set the AC at night it could be fine!
The comforter is weighty, it feels like quality, and has a soft fabric. I wouldn't use it without a duvet cover, that's more of an aesthetic choice but I like keeping it clean. The white is very white.
Honestly, I will be getting another one simply because I'm so impressed. Definitely no need to drop $300+ dollars elsewhere.
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Reviewed in the United States on October 25, 2025