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PAC1951T-2E/4MX

MCHPPAC1951T-2E/4MX

Microchip Technology
Current/Voltage Monitor Regulator High-Side 16-VQFN (3x3)
Active2,711 in stock
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Overview

The PAC1951T-2E/4MX is a high-side current and voltage monitor with integrated power accumulation and a 16-bit ADC resolution. It supports a wide bus voltage range from -0.2V up to 32V and features on-chip math for coulomb counting and power calculations, reducing MCU overhead.

Why Choose This Part

The device features real-time auto-calibration of offset error and 8X averaging modes to ensure high measurement accuracy. Integrated power accumulation and configurable ALERT pins allow for autonomous monitoring without constant polling from the host controller.

Applications

Battery State of Charge (SoC) Monitoring
Utilizes integrated coulomb counting and power accumulation to track battery capacity in portable electronics.
Server and Computing Power Rail Tracking
Monitors multi-rail power consumption with high accuracy to optimize thermal management and energy efficiency.
Industrial Energy Management
Provides precise current and voltage telemetry for motor control systems and industrial automation power distribution.

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

Interface the device over I2C or SMBus using the standard 0.5mm pitch VQFN footprint. For rapid prototyping, use the PAC1954 evaluation board or Microchip's Power Monitor GUI to configure the 16-bit registers and verify current sense resistor sizing.

Also Consider

INA226 TITexas Instruments - Offers 16-bit resolution with an extremely high common-mode range of up to 36V and a standard I2C interface.
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