Overview
The NCP5369MNR2G, produced by Onsemi, is an integrated driver and MOSFET module designed for high-current DC-DC buck power conversion applications. This device combines a MOSFET driver, high-side MOSFET, and low-side MOSFET into a compact 6 mm x 6 mm 40-pin QFN package. This integration significantly reduces package parasitics and board space compared to discrete component solutions. The NCP5369 is optimized for synchronous buck converter topologies, requiring only a single PWM input signal to drive both the high-side and low-side MOSFETs.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Control Input Voltage | VCIN | -0.3 | 5 | 7 | V |
| Power Input Voltage | VIN | -0.3 | 12 | 30 | V |
| Bootstrap Voltage | BOOT | -0.3 | - | 35 | V wrt/VSWH |
| Continuous Output Current | IOUT | - | - | 35 | A |
| Peak Output Current | IOUT | - | - | 50 | A |
| Junction Temperature | TJ | -55 | - | 150 | °C |
| Thermal Warning Temperature | - | - | 150 | °C | |
| Thermal Shutdown Temperature | - | - | 180 | °C | |
| Switching Frequency | FSW | - | - | 1 MHz | - |
Key Features
- Capable of switching frequencies up to 1 MHz
- Capable of output currents up to 35 A and peak currents up to 50 A
- Internal bootstrap diode and bootstrap circuit for high-side driver
- Zero current detection (ZCD) with auto-calibration
- Undervoltage lockout (UVLO) and thermal warning/shutdown protection
- Tri-state shutdown and output disable functionality
- Overlap protection circuit to prevent cross conduction between MOSFETs
- Pb-free and compliant with moisture sensitivity level 3
Applications
The NCP5369MNR2G is designed for use in synchronous buck converter topologies, particularly in high-current DC-DC power conversion applications. It is suitable for a variety of power management systems, including but not limited to:
- High-power DC-DC converters
- Server and data center power supplies
- Industrial power systems
- Automotive power management
- Telecommunications equipment
Q & A
- What is the maximum switching frequency of the NCP5369MNR2G?
The NCP5369MNR2G can operate at switching frequencies up to 1 MHz.
- What is the maximum output current of the NCP5369MNR2G?
The device can handle continuous output currents up to 35 A and peak currents up to 50 A.
- How does the bootstrap circuit work in the NCP5369MNR2G?
The bootstrap circuit uses an internal diode and an external bootstrap capacitor to generate the gate voltage for the high-side MOSFET, referenced to the switch node (VSWH) pin.
- What is the purpose of the zero current detection (ZCD) feature?
The ZCD feature allows the device to detect when the output current reaches zero, enabling more efficient operation and reducing losses.
- How does the thermal warning and shutdown protection work?
The device issues a thermal warning at 150°C and enters thermal shutdown at 180°C, resuming normal operation once the temperature drops below 155°C.
- What is the recommended operating voltage range for the NCP5369MNR2G?
The recommended operating voltage range is from 4.5 V to 25 V for VIN and 4.5 V to 5.5 V for VCIN.
- What type of package does the NCP5369MNR2G come in?
The device is packaged in a 6 mm x 6 mm 40-pin QFN package.
- Is the NCP5369MNR2G Pb-free and what is its moisture sensitivity level?
Yes, the NCP5369MNR2G is Pb-free and has a moisture sensitivity level of 3.
- What is the purpose of the overlap protection circuit?
The overlap protection circuit prevents cross conduction between the high-side and low-side MOSFETs, ensuring efficient and safe operation.
- How should the power supply be decoupled for the NCP5369MNR2G?
A low ESR capacitor (typically 1 μF to 4.7 μF multi-layer ceramic capacitor) should be placed near the power and ground pins to maintain a stable supply voltage.
