Product category: Power Supply ICs and Controllers
News Release from: Intersil | Subject: Power solution for Mobile Pentium 4
Edited by the Electronicstalk Editorial Team on 8 March 2002
Power solution distributes mobile heat
Intersil's power solution for the Mobile Pentium 4 processor comprises an ISL6215 multiphase PWM controller plus two or three ISL6205 MOSFET drivers for modular power partitioning
Intersil's power solution for the Mobile Pentium 4 processor comprises an ISL6215 multiphase PWM controller plus two or three ISL6205 MOSFET drivers for modular power partitioning. This architecture simplifies component placement, regulates channel current and offers more efficient heat distribution.
This article was originally published on Electronicstalk on 8 March 2002 at 8.00am (UK)
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The designer can configure the solution for two or three phases, with the three-phase solution providing higher efficiency, better heat management and a reduction in the number of high-cost filter capacitors.
The ISL6215 controller offers many features optimised to power the mobile processor.
Foe example, it automatically switched to single channel operation in low-power modes to reduce power and maximise efficiency.
Further reading
Serial transmitter save power and protect
Low-voltage RS485/RS422 single transmitters come in very small TDFN and SOT23 packages
Serial receivers are well protected
Fully featured RS485/RS422 receivers provide 1/8 unit load input resistance and full fail-safe operation, along with enhanced ESD protection on the Rx input pins
'Lossless current sensing' eliminates the need for a current-sense resistor to reduce standby power.
Low power consumption and low leakage current extend battery run time for the end user.
Voltage accuracy is maintained at 1% over the entire temperature range.
The ISL6205 MOSFET driver ICs work with the ISL6215 controller to provide enhanced over-voltage, under-voltage and over-current protection.
Each ISL6205 IC drives both the high and low side N-channel mosfets required in the synchronous-buck convertor.
High switching frequency allows the use of smaller filter components.
Adaptive shoot-through protection provides for circuit optimisation.
Patented three-state PWM inputs significantly reduce negative transients on the output voltage when it is being shut down, thus eliminating the need for an additional Schottky diode to protect the CPU from negative voltages.
The ISL6205 handles phase voltages from -5 to +25 V.
This new power solution for the Mobile Intel Pentium 4 processor conforms precisely to Intel's mobile specifications and is a further development of Intersil's existing Pentium processor power controllers currently running in millions of PCs worldwide.
'Intersil's portable product roadmap to the future includes innovations in power and battery management for notebooks and handheld devices', said Rick Furtney, vice president and general manager of Intersil's Analogue Business Unit.
'We are committed to leveraging our industry-leading experience and expertise to bring our customers the power control they need for next and future generation mobile products'.
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