The ISL6353 is a three-phase PWM buck regulator controller for VR12 DDR memory applications. The multi-phase implementation results in better system performance, superior thermal management, lower component cost and smaller PCB area. The ISL6353 has two integrated power MOSFET drivers for implementing a cost effective and space saving power management solution. The PWM modulator of the ISL6353 is based on Intersils Robust Ripple Regulator™ (R3) technology. Compared with the traditional multi-phase buck regulator, the R3 modulator commands variable PWM switching frequency during load transients, achieving faster transient response. R3 also naturally goes into pulse frequency modulation operation in light load conditions to achieve higher light load efficiency. The ISL6353 is designed to be completely compliant with VR12 specifications. The ISL6353 has a serial VID (SVID) bus communicating with the CPU. The output can be programmed for 1-, 2- or 3-phase interleaved operation. The output voltage and power state can also be controlled independent of the serial VID bus. The ISL6353 has several other key features. It supports DCR current sensing with a single NTC thermistor for DCR temperature compensation or accurate resistor current sensing. It also has remote voltage sense, adjustable switching frequency, current monitor, OC/OV protection and power-good. Temperature monitor and thermal alert is available too.

Features

  • VR12 Serial Communications Bus
  • Precision Voltage Regulation
  • 5mV Steps with VID Fast/Slow Slew Rates
  • Supports Two Current Sensing Methods
  • Lossless Inductor DCR Current Sensing
  • Precision Resistor Current Sensing
  • Programmable 1, 2 or 3-Phase Operation
  • Adaptive Body Diode Conduction Time Reduction
  • Superior Noise Immunity and Transient Response
  • Pin Programmable Output Voltage and Power State Mode
  • Output Current Monitor and Thermal Monitor
  • Differential Remote Voltage Sensing
  • High Efficiency Across Entire Load Range
  • Programmable Switching Frequency
  • Resistor Programmable VBOOT, Power State Operation, SVID Address Setting, IMAX
  • Excellent Dynamic Current Balance Between Phases
  • OCP/WOC, OVP, OT Alert, PGOOD
  • Small Footprint 40 Ld 5x5 TQFN Package
  • Pb-Free (RoHS Compliant)

Applications

  • DDR Memory

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TQFN Tube 60
Availability
Active TQFN Reel 6000
Availability
Active TQFN Reel 1000
Availability
Active TQFN Tube 60
Availability
Active TQFN Reel 6000
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL6353 Datasheet Datasheet PDF 1.79 MB
Application Notes & White Papers
Five Easy Steps to Create a Multi-Load Power Solution White Paper PDF 846 KB
AN1681: Grounding Techniques Application Note PDF 509 KB
AN1684: Nonideality of Ground Application Note PDF 397 KB
PCNs & PDNs
PCN13024 - Alternate Manufacturing Site for Assembly of the Listed Intersil DFN/QFN Packaged Products - Advanced Semiconductor Engineering - Chung-Li, Taiwan (ASECL Product Change Notice PDF 183 KB
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 Product Change Notice PDF 173 KB
Other
PIN19028 - Q3 Cy 19 Price Increase Notice Price Increase Notice PDF 208 KB