MAX17681
4.5V to 42V Input, High-Efficiency, Iso-Buck DC-DC Converter
Reduces External Components and Cost for DC-DC Isolation
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Overview
Features and Benefits
- Reduces External Components and Total Cost
- No OptoCoupler
- Synchronous Primary Operation
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 42V Input
- 0.9V to 0.96 x VIN Primary Output Voltage
- Delivers Up to 5W Output Power
- Reduces Power Dissipation
- Peak Efficiency > 90%
- 0.9µA (typ) Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Peak and Sink Current-Limit Protection
- ±1.7% Feedback Accuracy
- Programmable EN/UVLO Threshold
- Adjustable Soft-Start
- Overtemperature Protection
- -40°C to +125°C Operation
- Short-Circuit Protection
- MAX17681A Supports Robust Secondary-Side Short-Circuit Protection
- MAX17681A Is Recommended for All New Designs
Product Details
The MAX17681/MAX17681A is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.
MAX17681/MAX17681A uses peak-current-mode control. The low-resistance, on-chip MOSFETs ensure high efficiency at full load while simplifying the PCB layout.
The MAX17681/MAX17681A devices generate a well regulated primary side voltage which is then scaled by a suitable transformer turns ratio to derive isolated secondary output rails. While both MAX17681 and MAX17681A support primary side overcurrent protection, the MAX17681A is an enhanced design that supports robust secondary-side overcurrent protection as well.
The MAX17681/MAX17681A is available in a compact 10-pin (3mm x 2mm) TDFN package. Simulation models are available.
Applications
- Floating Power Supply Generation
- Isolated Fieldbus Interfaces
- Isolated Power Supplies in Medical Equipment
- PLC I/O Modules
- Smart Meters
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (12)
Documentation & Resources
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MAX17681 Reliability Data1/12/2023
Tools & Simulations
EE-Sim® Power Tools
The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.
SIMPLIS Models
WXSCH
The MAX17681 is a high-voltage, high efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.
236.12K
The MAX17681 is a high-voltage, high efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.
WXSCH
The MAX17681 is a high-voltage, high efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.
221.59K
The MAX17681 is a high-voltage, high efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.
Reference Designs (7)
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX17681AATB+ | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX17681AATB+T | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX17681ATB+ | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| MAX17681ATB+T | Material Declaration | Reliability Data | Thin Dual Flatpack No Leads | |
| Wafer Fabrication Data | MAX17681 Reliability Data |
Support & Discussions
Sample & Buy
Ordering FAQs
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Buy Now Pricing
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List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.