MAX1744
High-Voltage, Step-Down DC-DC Controller in µMAX
High-Voltage (36V) Step-Down DC-DC Controller in µMAX
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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.
Key Features
- 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
Applications/Uses
- Automotive Electronics
- FireWire®/IEEE® 1394
- Industrial Control Systems
- Telecom Systems
- Wall-Cube-Powered Devices
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| VOUT1 (V) (min) | 3.3 |
| VOUT1 (V) (max) | 5 |
| IOUT1 (A) (max) | 10 |
| Switch Type | External |
| Preset VOUT (V) | 5 |
| Output Adjust. Method | Preset Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 330 |
| Package/Pins | UMAX/10 |
| Budgetary Price (See Notes) | $2.97 @1k |
Technical Docs
| Data Sheet | High-Voltage, Step-Down DC-DC Controller in µMAX | Feb 10, 2010 | |
| App Note | Turn-On Switching Loss of An Asynchronous Buck Converter |
Click any title below to view the detail page where available.
Description
The MAX1744 evaluation kit (EV kit) provides a selectable 3.3V or 5V output voltage from input as high as 36V. The MAX1744 operates up to 100% duty cycle, extending the usable input voltage range. The 100% duty cycle and a low 100mV current-sense level permit very low dropout voltages. The circuit is configured to deliver up to 2A of output current with greater than 90% conversion efficiency. The output current can be increased by changing the external components.
This EV kit is a fully assembled and tested circuit board. It can also be used to evaluate the MAX1745, which has an adjustable output voltage, by selecting feedback resistors R2 and R3.
Features
- High Input Voltage (up to 36V)
- Selectable 3.3V or 5V Output Voltage (MAX1744)
- 1.25V to 18V Adjustable Output Voltage (MAX1745)
- Low Dropout Voltage
- 100% Maximum Duty Cycle
- 2A Output Current
- Up to 330kHz Switching Frequency
- 4µA IC Shutdown Current
- 10-Pin µMAX® Package
- Fully Assembled and Tested
Description
The MAX1744 evaluation kit (EV kit) provides a selectable 3.3V or 5V output voltage from input as high as 36V. The MAX1744 operates up to 100% duty cycle, extending the usable input voltage range. The 100% duty cycle and a low 100mV current-sense level permit very low dropout voltages. The circuit is configured to deliver up to 2A of output current with greater than 90% conversion efficiency. The output current can be increased by changing the external components.
This EV kit is a fully assembled and tested circuit board. It can also be used to evaluate the MAX1745, which has an adjustable output voltage, by selecting feedback resistors R2 and R3.
Features
- High Input Voltage (up to 36V)
- Selectable 3.3V or 5V Output Voltage (MAX1744)
- 1.25V to 18V Adjustable Output Voltage (MAX1745)
- Low Dropout Voltage
- 100% Maximum Duty Cycle
- 2A Output Current
- Up to 330kHz Switching Frequency
- 4µA IC Shutdown Current
- 10-Pin µMAX® Package
- Fully Assembled and Tested
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
| VIN (V) (min) | 4.5 |
| VIN (V) (max) | 36 |
| VOUT1 (V) (min) | 3.3 |
| VOUT1 (V) (max) | 5 |
| IOUT1 (A) (max) | 10 |
| Switch Type | External |
| Preset VOUT (V) | 5 |
| Output Adjust. Method | Preset Resistor |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 330 |
| Package/Pins | UMAX/10 |
| Budgetary Price (See Notes) | $2.97 @1k |
Key Features
- 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
Applications/Uses
- Automotive Electronics
- FireWire®/IEEE® 1394
- Industrial Control Systems
- Telecom Systems
- Wall-Cube-Powered Devices
Description
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.
Technical Docs
| Data Sheet | High-Voltage, Step-Down DC-DC Controller in µMAX | Feb 10, 2010 | |
| App Note | Turn-On Switching Loss of An Asynchronous Buck Converter |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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