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The ISL28023 is a bidirectional high-side and low-side digital current sense and voltage monitor with a serial interface. The device monitors power supply current, voltage and provides the digital results along with calculated power. The ISL28023 provides tight accuracy of 0.05% for both voltage and current monitoring. The auxiliary input provides an additional power monitor function.

The V_CC power can either be externally supplied or internally regulated, which allows the ISL28023 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.

An 8-bit voltage DAC enables a DC/DC converter output voltage margining. Fault indication includes a Bus Voltage window and overcurrent fast fault logic indication.

The ISL28023 serial interface is PMBus compatible and operates down to 1.2V voltage. It draws an average current of just 800µA and is available in the space saving 24 Ld QFN 4mmx4mm package. The part operates 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%
• Internal temperature sensor accuracy: +1.0°C
• High or low (RTN) side sensing
• Bidirectional current sensing
• Auxiliary low voltage channel
• ∆∑ADC, 16-bit native resolution
• Programmable averaging modes
• Internal 3.3V regulator
• Internal temperature sense
• Overvoltage/undervoltage and current fault monitoring with 500ns detection delay
• 8-bit voltage output DAC
• I2C/SMBus/PMBus interface that handles 1.2V supply

Applications

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