Features and Benefits
- High-Voltage Operation (up to 36VIN)
- Efficiency > 90%
- Output Power Capability Exceeds 50W
- 10-Pin µMax Package
- Low-Dropout Voltage
- 100% (max) Duty Cycle
- 90µA Quiescent Current
- 4µA Shutdown Current
- Up to 330kHz Switching Frequency
- Output Voltage
- 5V or 3.3V (MAX1744)
- Adjustable 1.25V to 18V (MAX1745)
- Current-Limited Control Scheme
The MAX1744/MAX1745 are step-down DC-DC controllers capable of handling up to 36V inputs. These parts use a proprietary current-limited control scheme for excellent light- and full-load efficiency, while their 330kHz (max) switching frequency permits small external components for space-critical applications. Operation to 100% duty cycle permits the lowest possible dropout voltage.
The MAX1744 contains an internal feedback network that provides a pin-selectable output voltage of either 3.3V or 5V. The MAX1745 uses an external feedback network to generate an adjustable output voltage between 1.25V and 18V.
The MAX1744/MAX1745 are available in a space-saving 10-pin µMAX® package.
- Automotive Electronics
- FireWire®/IEEE® 1394
- Industrial Control Systems
- Telecom Systems
- Wall-Cube-Powered Devices
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 (1)
The MAX1744 evaluation kit (EV kit) provides a selectable 3.3V or 5V output voltage from input as high as 36V. The MAX1744 operates up to 100% duty cycle, extending the usable input voltage range. The 100% duty cycle and a low 100mV current-sense level permit very low dropout voltages. The circuit is configured to deliver up to 2A of output current with greater than 90% conversion efficiency. The output current can be increased by changing the external components.
This EV kit is a fully assembled and tested circuit board. It can also be used to evaluate the MAX1745, which has an adjustable output voltage, by selecting feedback resistors R2 and R3.
- Automated Test Equipment (ATE)
- Automatic Utility Meter Reading
- Automotive Engine Control
- Automotive Passenger Compartment
- Automotive Sensors
- Battery Chargers
- Building Energy Management (HVAC)
- Building Security/Remote Cameras
- Cable Modems
- Cell Phone Base Stations
- Computers: Desktop, Workstation, Server
- Global Positioning Systems (GPS)
- High-Speed Access (Telecom)
- Industrial Sensor Transmitters/Transducers
- Local Multipoint Distribution Systems
- Network Hubs, Switches, Routers
- Notebook Computers
- Telecom Switches
- Wireless Local Loop (WLL)
Features & Benefits
- High Input Voltage (up to 36V)
- Selectable 3.3V or 5V Output Voltage (MAX1744)
- 1.25V to 18V Adjustable Output Voltage (MAX1745)
- Low Dropout Voltage
- 100% Maximum Duty Cycle
- 2A Output Current
- Up to 330kHz Switching Frequency
- 4µA IC Shutdown Current
- 10-Pin µMAX® Package
- Fully Assembled and Tested
Documentation & Resources
MAX1745 Reliability Data1/12/202332K
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.
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)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.
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