MAX1744 Datasheet PDF – Step-Down DC-DC Controller

Part Number: MAX1744

Function: High-Voltage / Step-Down DC-DC Controller in μMAX

Package: UMAX-10 Type

Manufacturer: Maxim Integrated


MAX1744 datasheet



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.


1. High-Voltage Operation (Up to 36V IN)

2. Efficiency > 90%

3. Output Power Capability Exceeds 50W

4. 10-Pin µMax Package

5. Low-Dropout Voltage

6. 100% (max) Duty Cycle

7. 90µA Quiescent Current

8. 4µA Shutdown Current

9. Up to 330kHz Switching Frequency

10. Output Voltage
(1) 5V or 3.3V (MAX1744)
(2)Adjustable 1.25V to 18V (MAX1745)

11. Current-Limited Control Scheme


1. Automotive Electronics

2. Telecom Systems

3. Wall-Cube-Powered Devices

4. Industrial Control Systems


Other data sheets are available within the file:

MAX1744AUB+, MAX1744EUB+, MAX1744EUB/V+, MAX1745


MAX1744 Datasheet PDF Download

MAX1744 pdf