MAX1745

Evaluation Kit Available Design Resources Tools and Models Support Click here to ask an associate for production status of specific part numbers. High-Voltage, Step-Down DC-DC Controllers in μMAX MAX1744/MAX1745 General Description 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 ● Telecom Systems ● Wall-Cube-Powered Devices ● Industrial Control Systems ● Firewire®/IEEE® 1394 μMAX is a registered trademark of Maxim Integrated Products, Inc. Firewire is a registered trademark of Apple, Inc. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. Typical Operating Circuit Features ● 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 ...