INTRODUCTION
The SMM153 is a highly accurate power supply voltage/current supervisor and monitor that allows realtime power measurement for power-critical designs. The part includes an internal voltage reference to accurately monitor the supply to within ±1%. The SMM153 can read the differential voltage of the supply and voltage drop of the current sense resistor over the I2C bus using an onchip 10-bit ADC.

FEATURES & APPLICATIONS
• Real-time power monitoring for “Green” systems
• Differential Voltage Sensing of the DC-DC converter output voltage
• Supply-side current monitoring (10-bit ADC)
• 10-bit ADC readout of supply voltage over I2C bus
• Two programmable general purpose sensor inputs (COMP1/2) – UV/OV with FAULT Output
• Programmable glitch filters (COMP1/2)
• Programmable internal COMP1/2 VREF: 0.5V or 1.25V
• Operates from 2.7V to 5.5V supply
• Current sensing from 4.0V to 15V supply
• Programmable general-purpose inputs/outputs
• General-purpose 256-Byte EEPROM with Write Protect
• I2C 2-wire serial bus for programming configuration and monitoring status
• 28-lead 5x5 QFN package

Applications
• In-system test and control of Point-of-Load (POL)
• Power Supplies for Multi-voltage Processors, DSPs and ASICs
• Routers, Servers, Storage Area Networks