Description

The SMM0204501K8 is an electronic component model in the IC Chips product category. It is a highly accurate power supply voltage/current supervisor and monitor with provisions for voltage margining of the monitored supply. The SMM0204501K8 includes an internal voltage reference to accurately monitor and margin the supply to within ±1%. It has the capability to margin over a wide range from 0.3V to VDD using the internal reference and can read the differential voltage of the supply and voltage drop of the current sense resistor over the I2C bus using an on-chip 10-bit ADC. The margin levels are set using the I2C serial bus. The SMM0204501K8 can initiate margining via the I2C bus or by using the MUP or MDN inputs. When the preprogrammed margin target voltage is reached, it holds the converter at this voltage until receiving an I2C command or de-asserting the margin input pin. The TRIM output pin is held in a high impedance state when the SMM0204501K8 is not margining, allowing the converter to operate at its nominal set point.

Specifications and features

• Capable of margining supplies with trim inputs using either positive or negative trim pin control
• Wide Margin range of 0.3V to VDD with internal reference
• 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
• Margining Controlled Via:
◾ I2C Command
◾ Input Pins (MUP, MDN)
• 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 I/Os (SMM152)
• General Purpose 256-Byte EEPROM with Write Protect
• I2C 2-wire serial bus for programming configuration and monitoring status
• 28-lead 5x5 QFN

Application Scenarios

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

Comparison