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 VCC 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. A
temperature sensing option includes both internal
temperature sensor and a bias/monitor circuit for external
diode sensing.
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.

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
• 55 I2C slave addresses

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