## Overview

The onsemi FPF2700MX is an advanced multi-channel load switch IC designed to provide efficient and reliable power distribution in system applications. It integrates four independently controllable switches with integrated current limiting, over-temperature protection, and fault signaling. The device is optimized for managing multiple power rails, protecting sensitive downstream circuitry, and ensuring controlled inrush current during system power-up.

## Electrical Characteristics

* Number of channels: 4 independent power switches
* Switch type: N-channel MOSFETs
* Maximum continuous current per channel: 2 A
* On-resistance (RDS(on)): 40 mΩ typical per switch
* Input voltage range: 2.7 V to 5.5 V
* Output voltage drop (VDS) at rated current: 80 mV typical
* Quiescent current (IQ): 30 µA typical per channel
* Maximum surge current: 4 A for 1 ms
* Over-current protection threshold: 2.5 A typical
* Over-temperature shutdown: 150°C typical
* Thermal hysteresis: 20°C typical

These electrical specifications enable the FPF2700MX to safely deliver high current to multiple loads while maintaining low power dissipation and minimal voltage drop.

## Functional Features

* Independent enable pins for each channel allow selective power management
* Integrated current limiting to prevent overcurrent conditions and protect system components
* Thermal shutdown with automatic recovery to prevent damage under fault conditions
* Power-good output signaling for system monitoring and sequencing
* Slew-rate controlled switch turn-on to reduce inrush current and minimize EMI
* Fault reporting: Active-low open-drain output indicates over-current or thermal events

The combination of protection, control, and monitoring features makes the FPF2700MX highly suitable for complex multi-rail systems.

## Timing and Control

* Turn-on rise time (slew rate): 500 µs typical per channel (configurable by external capacitor)
* Enable logic threshold:

* High level: 1.4 V to VDD
* Low level: 0.4 V maximum
* Enable propagation delay: 25 µs typical
* Fault propagation delay: 15 µs typical

These parameters ensure predictable switch behavior, allowing precise sequencing and load management in power-sensitive applications.

## Thermal Characteristics

* Maximum junction temperature (TJ): 150°C
* Storage temperature range: -65°C to +150°C
* Thermal resistance junction-to-ambient (RθJA): 45°C/W typical in standard 4-layer PCB
* Thermal resistance junction-to-case (RθJC): 10°C/W typical

Thermal management is critical for reliable operation at full current; the low RDS(on) minimizes power dissipation and allows compact board layouts.

## Mechanical and Package Features

* Package: 16-lead SOIC (Small Outline Integrated Circuit)
* Package dimensions: 10.3 mm × 7.5 mm typical
* Lead pitch: 1.27 mm
* Lead finish: RoHS-compliant matte tin
* Surface-mount compatible for high-density PCB layouts
* Compact, thermally efficient package suitable for multi-channel integration

The SOIC-16 package allows easy integration while maintaining thermal performance and mechanical reliability.

## Applications

* Multi-rail power management in industrial, automotive, and consumer systems
* Hot-swap and controlled power-up sequencing for sensitive electronics
* Overcurrent and thermal protection for microcontrollers, FPGAs, and ASICs
* Portable devices requiring efficient and reliable load switching
* Power distribution in communication and networking equipment

The FPF2700MX is ideal for applications requiring reliable, high-current load switching with integrated protection and monitoring.

## Key Features and Advantages

* Four independent N-channel MOSFET switches, each rated for 2 A continuous current
* Low on-resistance: 40 mΩ typical for minimal voltage drop
* Integrated current limiting, over-temperature protection, and fault signaling
* Configurable slew rate for controlled inrush current and reduced EMI
* Wide input voltage range: 2.7 V to 5.5 V
* Low quiescent current: 30 µA typical per channel for energy-efficient operation
* Independent enable pins for flexible system control and sequencing
* Compact 16-lead SOIC package suitable for dense PCB layouts
* Reliable operation over industrial temperature range

The onsemi FPF2700MX provides a high-performance, safe, and flexible solution for multi-channel power distribution, combining precise control, protection, and system monitoring capabilities for demanding embedded and industrial applications.