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