Analog Devices MAX1744 Product Info

• High-Voltage Operation (up to 36V_IN)
• 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.

Applications

• Automotive Electronics
• FireWire®/IEEE® 1394
• Industrial Control Systems
• Telecom Systems
• Wall-Cube-Powered Devices