onsemi MBRD1035CTLG Schottky Barrier Rectifier: Datasheet, Pinout, and Application Circuits
The onsemi MBRD1035CTLG is a highly efficient Schottky barrier rectifier designed for high-frequency power conversion and protection circuits. Housed in a compact TO-252 (DPAK) package, this device is optimized for applications requiring low forward voltage drop and minimal switching losses, making it a superior choice over standard PN junction diodes in many modern electronic systems.
Datasheet Overview: Key Specifications
The MBRD1035CTLG is a dual common-cathode Schottky rectifier. Its key electrical characteristics define its performance envelope:
Average Forward Current (IF(AV)): 15A per diode, with a non-repetitive peak surge current (IFSM) of 150A.
Repetitive Peak Reverse Voltage (VRRM): 35V, making it suitable for lower voltage applications like switch-mode power supply (SMPS) outputs.
Forward Voltage Drop (VF): Typically 0.55V at 7.5A, 125°C. This low VF is critical for minimizing power dissipation and improving system efficiency.
Operating Junction Temperature (TJ): -65°C to +150°C, ensuring reliability under a wide range of environmental conditions.
Pinout and Package Configuration
The device is offered in the TO-252-2 (DPAK) package. The pinout configuration is straightforward:
Pin 1 (Tab): Cathode (K). This pin is common to both internal diodes and is electrically connected to the device's mounting tab.
Pin 2: Anode 1 (A1). The anode terminal for the first diode.
Pin 3: Anode 2 (A2). The anode terminal for the second diode.
The large tab provides excellent thermal performance, allowing the rectifier to dissipate heat effectively when mounted on a PCB copper area.
Application Circuits
The MBRD1035CTLG's common-cathode configuration and high-current capability make it ideal for several key circuits:
1. Synchronous Rectification in SMPS: In switch-mode power supplies (e.g., DC-DC converters), it is commonly used on the secondary side to rectify the transformed AC voltage. Its fast switching speed reduces reverse recovery losses, leading to cooler operation and higher efficiency compared to ultrafast diodes.
2. Polarity Protection: It serves as an effective reverse polarity protection diode in high-current systems like automotive electronics or battery-powered equipment. Its low forward voltage ensures a minimal voltage loss in the forward path.
3. Freewheeling Diode: In inductive load circuits, such as motor drives or relay controllers, it acts as a freewheeling diode, providing a safe path for current to decay when the driving switch (like a MOSFET) turns off, thereby protecting sensitive components from voltage spikes.
ICGOODFIND Summary
The onsemi MBRD1035CTLG stands out as a robust and highly efficient solution for power rectification tasks. Its defining advantages include an extremely low forward voltage drop, which directly translates to reduced power loss and higher system efficiency, and its exceptionally fast switching capability, which is essential for high-frequency operation. The common-cathode design in a thermally efficient DPAK package offers designers flexibility and reliability in compact, high-current applications such as power supply units (PSUs), inverters, and automotive systems.
Keywords:
Schottky Rectifier, Low Forward Voltage, Fast Switching, Synchronous Rectification, Power Supply
