ISL6264 Core Controller Uses Intersil’s Patented R3 Technology™ for Better Transient Response and Two Interleaved Channels to Reduce Output Voltage Ripple with Fewer Components
Intersil Corporation (NASDAQ Global Select: ISIL), a world leader in the design and manufacture of high-performance analog semiconductors, today introduced a new two-phase core controller with embedded gate drivers to power AMD’s next-generation (64-bit Turion™) mobile CPUs. This device offers improved transient response and load line accuracy enabled by Intersil’s patented R3 (Robust Ripple Regulator) Technology™.
Intersil’s new R3 controller uses post package trimming to remove all errors associated with assembly and offers 0.5% accuracy across the entire temperate range, which is the best in the industry. The device uses two interleaved channels to double the output voltage ripple frequency, reducing output voltage ripple amplitude with fewer components, lower component cost, reduced power dissipation and smaller real estate area.
“The ISL6264 uses Intersil’s patented R3 Technology to meet the transient response and light-load efficiencies required by AMD (Turion™) processors,” said Majid Kafi, director of Intersil’s Notebook Power products group. “Intersil now offers a vast number of products that power the latest CPUs by both Intel and AMD. The dynamic phase adding/dropping optimizes the efficiency of the CPUs, improving battery life.”
Intersil’s Core Controller for AMD Turion Mobile CPUs
The ISL6264 is a two-phase controller with embedded gate drivers. The heart of the ISL6264 is the patented R3 Technology, Intersil’s Robust Ripple Regulator modulator. Compared with traditional multiphase controllers, the ISL6264 has the fastest transient response due to the R3 modulator commanding variable switching frequency during a load transient.
To boost battery life, Intersil’s ISL6264 supports PSI_L by automatically enabling different operation modes. At heavy load operation in the active mode, the controller commands the two-phase continuous conduction mode (CCM) operation. While the PSI_L is asserted during the deeper sleep mode or the light load of active mode, the ISL6264 smoothly disables one phase and operates in a one-phase diode emulation mode (DE) to maximize the efficiency at light load.
A 6-bit digital-to-analog converter (DAC) allows dynamic adjustment of the core output voltage from 0.375V to 1.55V. 0.5% system accuracy of the core output voltage over temperature at active mode is achieved with the ISL6264.
A unity-gain differential amplifier is provided for remote CPU die sensing. This allows the voltage on the CPU die to be accurately measured and regulated per AMD mobile CPU specifications. Current sensing can be realized using either lossless inductor DCR sensing or precision resistor sensing. A single NTC thermistor network thermally compensates the gain and the time constant of the DCR variations.
Key Features
•Precision two-phase core voltage regulator
•0.5% system accuracy over temperature
•Enhanced load line accuracy
•Adjustable OFFSET for voltage positioning
•Dynamic phase adding/dropping
•6-bit microprocessor voltage identification (VID) input
•Support VID change on-the-fly
• Internal gate driver with 2A driving capability
• Lossless Inductor DCR Current Sensing
• Precision resistive current sensing
• Differential remote CPU die voltage sensing
• Static and dynamic current sharing
•Audio filter enable or disable
•Over-voltage, under-voltage, and over-current protection
•Small footprint of 40-lead QFN in 6x6mm2
Target Applications
•Notebook computer systems
•LCD-PC systems
•SAN or NAS systems
•Point of sale terminals
•Blade servers