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The ISL28025 is a bidirectional high-side and low-side digital current sense and voltage monitor with a serial interface. The device monitors power supply current and voltage, which provides the digital results along with calculated power. The ISL28025 provides tight accuracy of less than 0.1% for both voltage and current monitoring.

The V_CC power can either be externally supplied or internally regulated, which allows the ISL28025 to handle a common-mode input voltage range from 0V to 60V. The wide range permits the device to handle telecom, automotive and industrial applications with minimal external circuitry.

Fault indication includes Bus Voltage window and overcurrent fast fault logic indication. The ISL28025 includes an integrated temperature sensor for monitoring.

The ISL28025 serial interface is PMBus compatible and operates down to 1.2V voltage. It draws an average current of just 1.3mA and is available in the space saving 16 ball WLCSP package. The parts operate across the full industrial temperature range from -40°C to +125°C.

Key Features

• Bus voltage sense range: 0V to 60V
• Voltage gain error: 0.05%
• Current gain error: 0.05%
• High or low (RTN) side sensing
• Bidirectional current sensing
• Auxiliary low voltage input channel
• ΔΣADC, 16-bit native resolution
• Programmable averaging modes
• Internal 3.3V regulator
• Internal temperature sense
• Overvoltage/undervoltage and current fault monitoring with 500ns detection delay
• I2C/SMBus/PMBus interface that handles 1.2V supply
• 55 I2C slave addresses

Applications

• Data processing servers
• DC power distribution
• Telecom equipment
• Portable communication equipment
• DC/DC, AC/DC converters
• Automotive power
• Many I2C ADC with alert applications