MAX1745
PRODUCTIONHigh-Voltage, Step-Down DC-DC Controller in µMAX
High-Voltage (36V) Step-Down DC-DC Controller in µMAX
- Part Models
- 6
- 1ku List Price
- Starting From $4.87
Overview
- 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.
Applications
- Automotive Electronics
- FireWire®/IEEE® 1394
- Industrial Control Systems
- Telecom Systems
- Wall-Cube-Powered Devices
Documentation
Data Sheet 1
Technical Articles 2
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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1745AUB+ | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX1745AUB+T | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX1745EUB+ | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX1745EUB+T | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX1745EUB/V+ | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX1745EUB/V+T | Micro-MAX, Thin Shrink Small-Outline |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571B PIN/ERRATA |
||
| MAX1745AUB+T | PRODUCTION | |
| MAX1745EUB+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Switching Regulators & Controllers 8 | ||
| MAX1626 | PRODUCTION | 5V/3.3V or Adjustable, 100% Duty Cycle, High-Efficiency, Step-Down DC-DC Controllers |
| MAX1627 | PRODUCTION | 5V/3.3V or Adjustable, 100% Duty Cycle, High-Efficiency, Step-Down DC-DC Controllers |
| MAX797 | PRODUCTION | Step-Down Controllers with Synchronous Rectifier for CPU Power |
| MAX797H | PRODUCTION | High-Voltage, Step-Down Controller with Synchronous Rectifier for CPU Power |
| MAX1652 | Obsolete | High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP |
| MAX1653 | PRODUCTION | High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP |
| MAX1654 | PRODUCTION | High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP |
| MAX1655 | PRODUCTION | High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP |
Evaluation Kits
Evaluation Kit for the MAX1744, MAX1745
Evaluation Kit for the MAX1744, MAX1745
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