BSC067N06LS3G
Infineon
A 60V 50A MOSFET BSC067N06LS3 G from Infineon is used as the high-side MOSFET for both outputs.
Reference DesignAnalog
MAXREFDES1039: 16V/24V Dual Output Buck Converter using MAX17559
A 64W and 48W dual-output synchronous buck converter reference design using the MAX17559 controller, providing 16V at 4A and 24V at 2A from a 36V-51V input.
Overview
The MAXREFDES1039 is a reference design for a dual-output synchronous buck converter featuring the Maxim Integrated MAX17559 peak-current-mode controller. The design operates from a 36V to 51V input voltage range and provides two independent outputs: 16V at 4A (64W) and 24V at 2A (48W). To reduce input capacitor size and voltage ripple, the outputs operate 180 degrees out of phase. The system achieves up to 95% efficiency and utilizes a 350kHz switching frequency. Detailed design procedures are provided for selecting inductors, such as the Wurth Elektronik 74435572200 and 7447709470, as well as programming peak current limits and output voltage feedback networks.
Use Cases
- Industrial Power Supplies
- Distributed DC Power Systems
- Motion Control
- Programmable Logic Controllers
- Computerized Numerical Control
Topics
MAX17559
dual-output buck converter
synchronous step-down
DC-DC converter
reference design
industrial power supply
MAXREFDES1039
interleaving
peak-current-mode
Referenced Parts
74435572200
Wurth Electronics
For VOUT1, we selected the Würth Elektronik power inductor 74435572200 of 22μH
7447709470
Wurth Electronics
Similarly, for VOUT2, we selected the Würth Elektronik power inductor 7447709470 of 47μH
MAX17559
Maxim Integrated
The MAX17559 is a dual-output, synchronous step-down controller that drives nMOSFETs.
RJK0653DPB-00#J5
Renesas Technology Corporation
A 60V 45A MOSFET RJK0653DPB-00#J5 from Renesas Technology Corporation is used as the low-side MOSFET for both outputs.
| BSC067N06LS3G | Infineon | A 60V 50A MOSFET BSC067N06LS3 G from Infineon is used as the high-side MOSFET for both outputs. |
| 74435572200 | Wurth Electronics | For VOUT1, we selected the Würth Elektronik power inductor 74435572200 of 22μH |
| 7447709470 | Wurth Electronics | Similarly, for VOUT2, we selected the Würth Elektronik power inductor 7447709470 of 47μH |
| MAX17559 | Maxim Integrated | The MAX17559 is a dual-output, synchronous step-down controller that drives nMOSFETs. |
| RJK0653DPB-00#J5 | Renesas Technology Corporation | A 60V 45A MOSFET RJK0653DPB-00#J5 from Renesas Technology Corporation is used as the low-side MOSFET for both outputs. |