Overview
The NCP81258MNTBG is a high-performance dual MOSFET gate driver produced by onsemi. It is designed in a compact 2 mm x 2 mm DFN-8 package and is optimized to drive the gates of both high-side and low-side power MOSFETs in synchronous buck converters. This driver features a zero-current detection capability, which enhances efficiency even at light load conditions. Additionally, it includes VCC undervoltage lockout (UVLO) to ensure the MOSFETs are off when supply voltages are low, and a bi-directional Enable pin that provides a fault signal to the controller in case of a UVLO fault.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage - Max | 13.2 V |
| Rise Time | 16 ns |
| Fall Time | 11 ns |
| Minimum Operating Temperature | -40°C |
| Package Type | DFN-8 |
| Number of Outputs | 2 |
| Topology | Half-Bridge |
| Drive Source Current Typ | - |
| Drive Sink Current Typ | - |
Key Features
- Fast rise and fall times (16 ns and 11 ns respectively)
- Adaptive anti-cross-conduction circuit to prevent simultaneous conduction of high-side and low-side MOSFETs
- Pre-Overvoltage function for enhanced protection
- Zero-current detection for high efficiency at light load conditions
- VCC undervoltage lockout (UVLO) to ensure MOSFETs are off at low supply voltages
- Bi-directional Enable pin for fault signaling to the controller
Applications
- Vcore power subsystems
- Notebook computers
- Desktop computers
Q & A
- What is the NCP81258MNTBG used for? The NCP81258MNTBG is used to drive the gates of both high-side and low-side power MOSFETs in synchronous buck converters.
- What is the package size of the NCP81258MNTBG? The package size is 2 mm x 2 mm DFN-8.
- What are the rise and fall times of the NCP81258MNTBG? The rise time is 16 ns and the fall time is 11 ns.
- What is the minimum operating temperature of the NCP81258MNTBG? The minimum operating temperature is -40°C.
- Does the NCP81258MNTBG have undervoltage protection? Yes, it includes VCC undervoltage lockout (UVLO) to ensure the MOSFETs are off at low supply voltages.
- What is the purpose of the bi-directional Enable pin? The bi-directional Enable pin provides a fault signal to the controller in case of a UVLO fault.
- In which applications is the NCP81258MNTBG commonly used? It is commonly used in Vcore power subsystems, notebook computers, and desktop computers.
- What is the topology of the NCP81258MNTBG? The topology is Half-Bridge.
- Does the NCP81258MNTBG have zero-current detection? Yes, it features zero-current detection for high efficiency at light load conditions.
- What is the maximum supply voltage for the NCP81258MNTBG? The maximum supply voltage is 13.2 V.
