Overview
The NCP81158DMNTXG is a high-performance dual MOSFET gate driver produced by onsemi. It is designed to drive the gates of both high-side and low-side power MOSFETs in a synchronous buck converter. This component is packaged in a small 3 mm x 3 mm DFN-8 package, making it ideal for space-constrained applications. The driver includes an integrated boost diode to minimize the need for external components and features a VCC UVLO (Undervoltage Lockout) function to ensure the outputs are low when the supply voltage is low.
Key Specifications
| Parameter | Value |
|---|---|
| Package / Case | DFN-8 |
| Number of Drivers | 2 |
| Number of Outputs | 2 |
| Supply Voltage - Min | 4.5 V |
| Supply Voltage - Max | 5.5 V |
| Rise Time | 16 ns |
| Fall Time | 11 ns |
| Drive Source Current Typ | 2 A |
| Drive Sink Current Typ | 2 A |
| Turn On Prop. Delay Typ | 10 ns |
| Turn Off Prop. Delay Typ | 10 ns |
Key Features
- High-performance dual MOSFET gate driver for synchronous buck converters.
- Integrated boost diode to reduce external component count.
- VCC UVLO function to ensure safe operation during low supply voltage conditions.
- Tri-state PWM and EN inputs to place driver outputs into a high-impedance state.
- Compact DFN-8 package (3 mm x 3 mm) for space-efficient designs.
Applications
The NCP81158DMNTXG is suitable for various power management applications, including:
- Vcore power supplies in notebooks and desktop computers.
- Synchronous buck converters in high-efficiency power systems.
- Other applications requiring high-performance MOSFET gate driving.
Q & A
- What is the primary function of the NCP81158DMNTXG?
The NCP81158DMNTXG is a high-performance dual MOSFET gate driver designed to drive the gates of both high-side and low-side power MOSFETs in synchronous buck converters. - What package type does the NCP81158DMNTXG come in?
The NCP81158DMNTXG is packaged in a DFN-8 package, measuring 3 mm x 3 mm. - What is the minimum supply voltage for the NCP81158DMNTXG?
The minimum supply voltage is 4.5 V. - Does the NCP81158DMNTXG have an integrated boost diode?
Yes, the NCP81158DMNTXG includes an integrated boost diode to minimize external components. - What is the purpose of the VCC UVLO function?
The VCC UVLO function ensures that the outputs are low when the supply voltage is low, providing safe operation during low voltage conditions. - How many driver outputs does the NCP81158DMNTXG have?
The NCP81158DMNTXG has 2 driver outputs. - What are the typical rise and fall times of the NCP81158DMNTXG?
The typical rise time is 16 ns, and the typical fall time is 11 ns. - What are the typical drive source and sink currents of the NCP81158DMNTXG?
The typical drive source and sink currents are both 2 A. - Can the driver outputs be placed into a high-impedance state?
Yes, the driver outputs can be placed into a high-impedance state via the tri-state PWM and EN inputs. - What are some common applications for the NCP81158DMNTXG?
Common applications include vcore power supplies in notebooks and desktop computers, and synchronous buck converters in high-efficiency power systems.
