SMM150 Datasheet | Summit Microelectronics

FEATURES - Capable of margining supplies with trim inputs using either positive or negative trim pin control - Wide Margin range from 0.3V to VDD using internal reference - 10-bit ADC readout of supply voltage over I2C bus - Margining Controlled Via: I2C mand .. Input Pins (MUP, MDN) - Two programmable general purpose sensor inputs (P1/2) - UV/OV with FAULT Output - Programmable glitch filter (P1/2) - Programmable internal VREF, 0.5V or 1.25V - Operates from 2.7V to 5.5V supply - General Purpose 256-Byte EEPROM with Write Protect - I2C 2-wire serial bus for programming configuration and monitoring status - 28 lead QFN - 20 ball Ultra CSPTM (Chip-Scale) package INTRODUCTION The SMM150 is a highly accurate power supply voltage supervisor and environmental monitor with provisions for voltage margining of the monitored supply. The part includes an internal voltage reference to accurately monitor and margin the supply to within ±1%. The SMM150 has the capability to margin over a wide range from 0.3V to VDD using the internal reference and can read the value of the supply over the I2C bus using an on-chip 10-bit ADC. The monitor and margin levels are set using the I2C serial bus. The SMM150 initiates margining via the I2C bus or by using the MUP or MDN inputs. Once the pre-programmed margin target voltage is reached, the SMM150 holds the converter at this voltage until receiving an I2C mand or de-asserting the margin input pin. When the SMM150 is not margining, the TRIM output pin is held in a high impedance state allowing the converter to operate at its nominal set point. Two general purpose input pins are provided for sensing under or overvoltage conditions. A programmable glitch filter associated with these inputs allows the user to ignore spurious noise signals. A FAULT# pin is asserted once either input set point is exceeded. Using the I2C interface, a host system can municate with the SMM150 status register and utilize 256-bytes of nonvolatile memory. Applications...