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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.

Features

1.High-Voltage Operation (Up to 36V IN)
2. Efficiency > 90%
3. Output Power Capability Exceeds 50W
4. Low-Dropout Voltage
5. 100% (max) Duty Cycle
6. 90µA Quiescent Current
7. 4µA Shutdown Current
8. Up to 330kHz Switching Frequency
9. Current-Limited Control Scheme