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PAC1944T-E/4MX

MCHPPAC1944T-E/4MX

Microchip Technology
Current/Voltage Monitor Regulator High-Side 16-VQFN (3x3)
Active8,462 in stock
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Overview

The PAC1944 is a four-channel current and power monitor that provides high-side sensing for rail voltages from 0V up to 9V. It features a wide dynamic range and internal 16-bit ADCs for simultaneous current and voltage measurements across multiple rails via an I2C or SMBus interface.

Why Choose This Part

The device offers exceptional low-power performance, drawing only 395-495 microamps at 1024 samples per second and just 5 microamps in sleep mode. It simplifies PCB design by integrating high-side sensing for four independent rails into a small 3x3mm VQFN package with wettable flanks for automated optical inspection.

Applications

AI and GPU Systems
Accurate power monitoring for high-power, low-voltage processors and neural engines.
Networking Hardware
Real-time power consumption tracking in optical modules and network switches.
Embedded Computing
Monitoring rail health in Linux-based SBCs and industrial single-board computers.
FPGA Power Management
Precise power-up sequence and consumption monitoring for multi-rail FPGA designs.

Key Specifications

Accuracy +/-1%
Function Current/Voltage Monitor
Mounting Type Surface Mount, Wettable Flank
Package / Case 16-VFQFN Exposed Pad
Sensing Method High-Side
Voltage - Input 2.7V ~ 5.5V
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 16-VQFN (3x3)

Getting Started

Engineers can evaluate the part using the PAC1944/5 Evaluation Board (ADM01091) which interfaces with a PC via USB. Hardware integration requires connecting the I2C/SMBus pins to a host microcontroller and sizing external shunt resistors to match the expected current range for the 16-bit ADCs.

Also Consider

INA226 TITexas Instruments - A high-accuracy 16-bit monitor with a higher voltage input range of up to 36V for industrial rails.
PAC1954 MCHPMicrochip Technology - Similar 4-channel architecture but adds support for high-speed I2C (up to 3.4 MHz) and additional data accumulation features.
MAX34417 Analog Devices - A four-channel power monitor designed for high-resolution accumulation in mobile and notebook applications.

Categories

Sensors > Current & Voltage Sensors Automotive > EV & Power Electronics IoT & Smart Devices > Edge AI & Computing Consumer Electronics > Battery Management