East Greenwich, RI--October 29, 1996--Based on a proprietary V2 architecture, the CS-5150, a new synchronous dual N-channel buck controller IC from Cherry Semiconductor Corp. (CSC; East Greenwich, RI) is designed specifically to power the core logic in Pentium Pro microprocessors, as well as other high-performance microprocessors in other personal computers and file servers.
The CS-5150 contains an on-chip 4-bit digital-to-analog converter (DAC) that sets its output voltage based on the value encoded in the Pentium Pro microprocessor. The DAC can also be hardwired to set the output gate drive voltage in 100mV steps between 2.14- and 3.54-V. The synchronous controller drives two N-channel MOSFET power transistors.
The CS-5150 includes built-in features such as a programmable soft start and lossless short-circuit protection. At start-up, the programmable soft-start provides system protection by minimizing both inrush current and output overshoot. The short-circuit protection circuitry eliminates a current sens resistor. Under short-circuit conditions, the CS-5150 moves into a hiccup mode with a three percent duty cycle. This minimizes power dissipation under short-circuit fault conditions and protects the IC and power MOSFETs from catastrophic failure.
The CS-5150 can operate from either 5- or 12-V power inputs and run at a frequency greater than 1 MHz. The output drivers deliver 1.5 A peak. It can be used in any Intel-based motherboard.
The CS-5150 is packaged in a 16-lead narrow small-outline (SO) and a 16-lead plastic DIP, and operates over a temperature range of 0 degrees C. to 70 degrees C.
In quantities of 10,000 pieces, the CS-5150 is priced at $3.50 per piece.
2000 S. County Trail
East Greenwich, RI 02818
Fax: (401) 885-5786
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