Digital Multi-Phase Buck Controller 48-Pin QFN EP T/R

The CHL8314 is a 4-phase digital synchronous buck controller for core regulation of high-performance Intel VR11.1 and VR11.0 platforms. The CHL8314 is fully compliant with VR11.1 including Power Status Indicator (PSI) and for improved light load efficiency and accurate current output (IMON). The CHL8314 includes a customized set of digital overclocking features which require no external components. Gaming applications can use the SMBus interface to place the VRD into “Gamer Mode” to extend VID up to 2.3V with 6.25 mV resolution. The CHL8314 deploys a number of efficiency shaping features such as variable MOSFET gate drive versus load, programmable PSI modes for optimum light-load along with programmable phase shedding to autonomously add/drop phases versus load. CHL8314 supports NTC temperature sense to report temperature and trigger VR HOT and OTP faults. Digital thermal balancing allows proportional current imbalance between phases. The CHL8314 provides extensive OVP, UVP, OCP, and OTP fault protection. Device and fault configuration parameters are easily defined using the IR Power Designer GUI and stored in on-chip non-volatile memory (NVM). The 3-pin SMBus interface can be used to monitor a variety of operating parameters on up to seven CHL8314 based VRs. The controller includes a unique sensor less and lossless input current monitoring capability.

• Intel VR11.x compliant Digital PWM Controller
• Programmable 1-phase to 4-phase operation
• Customized Digital Over-Clocking features an easy-to-use SMBus Gamer command and a Gamer VID control up to 2.3V, Gamer Vmax, VID Override or Track, Digital Load-Line Adjust, Gamer OC/OVP, Gamer OFF pin and Gamer OTP
• IR Efficiency Shaping features a Variable Gate Drive and Dynamic Phase Control
• 1-phase to 2-phase PSI for Light Loads
• Adaptive Transient Algorithm minimizes capacitors
• Enables Thermal Phase Balancing
• SMBus Fault Indicators: OVP, UVP, OCP, OTP SMBus interface for configuring and monitoring; SMBus commands include monitoring input current and power
• Compatible with IR ATL Drivers and tri-state drivers
• 9 bytes of NVM storage available for customer use
• +3.3V supply voltage; 0ºC to 85ºC Ambient operation
• RoHS Compliant, MSL level 1 package