Hot Swap Controller 1 Channel General Purpose 32-LQFN (5x5)

The NCP81428MNTXG is a high-performance multi-phase synchronous buck controller designed for CPU, GPU, FPGA, ASIC, and high-current core power applications requiring accurate voltage regulation, fast transient response, and high efficiency. The device supports multi-phase operation with integrated gate drivers and advanced control architecture optimized for modern low-voltage, high-current power rails. It is intended for applications requiring dynamic voltage scaling, precise load-line regulation, and reliable system power management in computing, networking, telecommunications, and industrial platforms.

The controller operates with external MOSFET stages and supports flexible power stage configuration for optimized thermal and efficiency performance. It incorporates differential voltage sensing, programmable protection features, current balancing between phases, and high-speed transient compensation to maintain stable operation under rapidly changing load conditions.

Engineering Specification

Manufacturer onsemi

Manufacturer Part Number NCP81428MNTXG

Device Type Multi-Phase Synchronous Buck Controller with Integrated Gate Drivers

Control Topology Voltage Mode Multi-Phase PWM Control

Phase Configuration Dual-Phase Controller Architecture

Application Focus CPU Core Power GPU Core Regulation FPGA Power Rails ASIC Core Supplies High-Current DC-DC Regulation

Input Supply Range Supports Low-Voltage Bias Supply Operation for Digital Power Systems

Output Voltage Regulation Programmable Low-Voltage Output Regulation with Differential Remote Sense Capability

Switching Frequency Programmable PWM Switching Frequency with Multi-Phase Interleaving

Gate Driver Integration Integrated High-Side and Low-Side MOSFET Gate Drivers

Current Sensing Supports Inductor DCR Sensing and Sense Resistor Current Monitoring

Load-Line Support Programmable Load-Line Regulation and Droop Compensation

Voltage Positioning Adaptive Voltage Positioning for Improved Transient Performance

Protection Features Overcurrent Protection Overvoltage Protection Undervoltage Protection Thermal Protection Short-Circuit Protection Power-Good Monitoring

Power Management Features Soft-Start Control Enable Functionality Phase Balancing Fault Monitoring Sequencing Support

Compensation External Compensation Network Support for Loop Stability Optimization

Efficiency Features Synchronous Rectification Support Multi-Phase Interleaving for Reduced Ripple Current Optimized Gate Drive Timing

Package Type QFN Surface-Mount Package

Mounting Type Surface Mount Technology

Temperature Range Industrial Operating Temperature Range

Target Applications Server Motherboards High-Performance Embedded Computing Networking Equipment Telecommunications Infrastructure Industrial Processing Systems Graphics and Accelerator Platforms

#commonpartslibrary #integratedcircuit #powermanagement #hotswapcontrollers