Fairchild Semiconductor Releases FAN5056MV85 Power Management IC
Fairchild Semiconductor (San Jose, CA) released the FAN5056MV85 power management IC for low-cost desktop computers. Fairchild Semiconductor claims that the FAN5056MV85 is the first announced IC to comply with the VRM 8.5 specification for Intel Pentium III processors. This IC includes one single-phase pulse-width modulated (PWM) switching regulator controller and three linear regulators.
The PWM switching regulator in the FAN5056MV85 is a synchronous-mode dc/dc controller that provides a core voltage of 1.05V to 1.825V in 25mV steps at over 30A, with ±0.8 percent accuracy, according to the voltage identification code supplied. Programmable Active Droop provides optimum transient response while minimizing the number of output capacitors. The FAN5056 senses the output current using the Rds(on) of the external MOSFETs.
The FAN5056MV85 has three linear regulators, each capable of supplying over 2A for Vclock (2.5V), Vnorthbridge (1.8V) and Vagp with Type Detect (selectable 1.5V/3.3V). Additional FAN5056MV85 features include over-voltage, under-voltage, over-current, PowerGood monitors and thermal-shutdown protection. Applications include use as a power supply for Pentium III platforms, as a VRM for Pentium IV and processor, and as a programmable multi-output power supply.
The FAN5056MV85 is available in a 24-pin SOIC package. An evaluation board is also available. The device is priced at $1.25 each in quantities of 1,000 pieces. Samples are currently available with production quantities in seven to eight weeks ARO.
