Non-Isolated Buck DC-DC Converter

This reference design provides design guide, data and other contents of multiple non-isolated buck DC-DC converter power supplies. Multiple variations of the power supply are optimized for various outputs, loads and board mounting areas.

Photo of non-isolated buck DC-DC converter.
Simple block diagram of non-isolated buck DC-DC converter.

Features

  • Non-Isolated Buck DC-DC Converter with synchronous rectification
  • 8 power supply circuit designs with different output voltage and output power
  • Each power supply circuit design has 3 variations

Description

Input voltage DC 12 V
Output voltage/current 5V/5A、5V/8A、5V/12A、3.3V/10A、3.3V/13.3A、3.3V/18.2A、1.5V/10A、1.05V/10A
Optimization Each design is optimized for efficiency at 50% load and 100% load and also for small size
Design Variations 24
Efficiency curves of non-isolated buck DC-DC converter.
Efficiency Curves

Design Documents

Materials for designers, such as an overview of circuit operation and explanations of design considerations. Please click on each tab to view the contents.

Design Data

Provides circuit data that can be loaded into EDA tools, PCB layout data, and data used in PCB manufacturing. Available in formats from multiple tool vendors. You can freely edit it with your preferred tool.

Used Toshiba Items

Part Number Device Category Portion Usage Description
Power MOSFET (N-ch single VDSS≤30V) High-side N-ch MOSFET, 30 V, 0.0032 Ω@10V, SOP Advance, U-MOSⅧ-H
Power MOSFET (N-ch single VDSS≤30V) High-side N-ch MOSFET, 30 V, 0.004 Ω@10V, SOP Advance, U-MOSⅧ-H
Power MOSFET (N-ch single VDSS≤30V) High-side/Low-side N-ch MOSFET, 30 V, 0.0089 Ω@10V, SOP Advance, U-MOSⅧ-H
Power MOSFET (N-ch single VDSS≤30V) High-side/Low-side N-ch MOSFET, 30 V, 0.011 Ω@10V, SOP Advance, U-MOSⅧ-H
Power MOSFET (N-ch single VDSS≤30V) High-side N-ch MOSFET, 30 V, 0.0043 Ω@10V, TSON Advance, U-MOSⅧ-H
Power MOSFET (N-ch single VDSS≤30V) High-side/Low-side N-ch MOSFET, 30 V, 0.0089 Ω@10V, TSON Advance, U-MOSⅧ-H
Power MOSFET (N-ch single VDSS≤30V) High-side N-ch MOSFET, 30 V, 0.011 Ω@10V, TSON Advance, U-MOSⅧ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.00065 Ω@10V, SOP Advance(N), U-MOSⅨ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.00092 Ω@10V, SOP Advance(N), U-MOSⅨ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.002 Ω@10V, SOP Advance, U-MOSⅨ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.0029 Ω@10V, SOP Advance, U-MOSⅨ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.0048 Ω@10V, SOP Advance, U-MOSⅨ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.0016 Ω@10V, TSON Advance, U-MOSⅨ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.0029 Ω@10V, TSON Advance, U-MOSⅨ-H
Power MOSFET (N-ch single VDSS≤30V) Low-side N-ch MOSFET, 30 V, 0.0052 Ω@10V, TSON Advance, U-MOSⅨ-H

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