Overview

The ISL6261 is a single-phase buck regulator implementing lntel® IMVP-6® protocol, with embedded gate drivers. The heart of the ISL6261 is the patented R3 Technology™, Intersil's Robust Ripple Regulator modulator. Compared with the traditional multi-phase buck regulator, the R3 Technology™ has faster transient response. This is due to the R3 modulator commanding variable switching frequency during a load transient. lntel® Mobile Voltage Positioning (IMVP) is a smart voltage regulation technology effectively reducing power dissipation in lntel® Pentium processors. To boost battery life, the ISL6261 supports DPRSLRVR (deeper sleep) function and maximizes the efficiency via automatically changing operation modes. At heavy load in the active mode, the regulator commands the continuous conduction mode (CCM) operation. When the CPU enters deeper sleep mode, the ISL6261 enables diode emulation to maximize the efficiency at light load. Asserting the FDE pin of the ISL6261 in deeper sleep mode will further decrease the switching frequency at light load and increase the regulator efficiency. A 7-bit digital-to-analog converter (DAC) allows dynamic adjustment of the core output voltage from 0. 300V to 1. 500V. The ISL6261 has 0. 5% system voltage accuracy over temperature. A unity-gain differential amplifier provides remote voltage sensing at the CPU die. This allows the voltage on the CPU die to be accurately measured and regulated per lntel® IMVP-6 specification. Current sensing can be implemented through either lossless inductor DCR sensing or precise resistor sensing. If DCR sensing is used, an NTC thermistor network will thermally compensates the gain and the time constant variations caused by the inductor DCR change.

ISL6261 Functional Diagram
ISL6261 Functional Diagram
  • Precision single-phase CORE voltage regulator
  • 0.5% system accuracy over temperature
  • Enhanced load line accuracy
  • Internal gate driver with 2A driving capability
  • Microprocessor voltage identification input
  • 7-Bit VID input
  • 0.300V to 1.500V in 12.5mV steps
  • Support VID change on-the-fly
  • Multiple current sensing schemes supported
  • Lossless inductor DCR current sensing
  • Precision resistive current sensing
  • Thermal monitor
  • User programmable switching frequency
  • Differential remote voltage sensing at CPU die
  • Overvoltage, undervoltage, and overcurrent protection
  • Pb-free plus anneal available (RoHS compliant)

Documentation

= Featured Documentation
Type Title Date
Datasheet
ISL6261 Datasheet
PDF 1.95 MB
End Of Life Notice
PLC21060 - End of Life Notice
PDF 603 KB
Product Change Notice
PCN20029A - Alternate bond wire material and assembly facility of the listed Renesas QFN packaged products
PDF 326 KB
Product Change Notice
PCN13025B - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products
PDF 222 KB
Product Change Notice
PCN13025 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li , Taiwan and STATS ChipPAC (SCM) - Kuala Lumpur, Mal
PDF 106 KB
Product Change Notice
PCN13009 - Alternate Bond Wire Material and Manufacturing Facilities for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering (ASECL) - Chung-Li (ASECL), Taiwan and STATS ChipPAC (SCM) - Kuala Lump
PDF 173 KB
Product Change Notice
PCN10055 - Alternate Bond Wire Material for Assembly of the Listed Intersil DFN/QFN Packaged Products - STATS ChipPAC Malaysia
PDF 248 KB
Application Note
AN1681: Grounding Techniques
PDF 509 KB
Application Note
AN1684: Nonideality of Ground
PDF 397 KB
9 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    MOQ
    Buy / Sample
    Part Number
    ISL6261CRZ
    circleObsolete
    memory
    spa
    view_in_ar
    		QFN Tube 500
    ISL6261CRZ-T
    circleObsolete
    memory
    spa
    view_in_ar
    		QFN Reel 4000
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