Digital Multi-Phase Buck Controller

The CHL8103 are dual-loop, digital multi-phase buck controllers designed for CPU voltage regulation. The CHL8113 is a single-loop, digital multiphase buck controller ideal for Server DDR memory voltage regulation. They are fully compliant with the Intel VR12 and AMD SVI (CHL8103) specifications. The CHL8103 includes IR Efficiency Shaping Technology to deliver exceptional efficiency at minimum cost across the entire load range. IR Dynamic Phase Control adds/drops active phases based upon load current and can be configured to enter 1-phase operation and diode emulation mode automatically or by command. IR’s unique Adaptive Transient Algorithm (ATA), based on proprietary non-linear digital PWM algorithms, minimizes output bulk capacitors and Multiple Time Programmable (MTP) storage saves pins and enables a small package size. Device configuration and fault parameters are easily defined using the IR Digital Power Design Center (DPDC) GUI and stored in on-chip MTP. The CHL8103 provides extensive OVP, UVP, OCP and OTP fault protection and the CHL8103 includes thermistor based temperature sensing with VRHOT signal. The CHL8103 includes numerous features like register diagnostics for fast design cycles and platform differentiation, truly simplifying VRD design and enabling fastest time-to-market (TTM) with “set-and-forget” methodology.

• Dual output 2/3/4+1-phase PWM Controller (CHL8102/03/04) and single output 3-phase PWM Controller (CHL8113)
• Easiest layout and fewest pins in the industry
• Footprint compatible with CHL8325A/B (CHL8103/4)
• Fully supports Intel® VR12 (CHL8103/04/13) and AMD® SVI with dual OCP & programmable addressing (CHL8103/04)
• I2C interface for configuration & telemetry
• Pin programmable I2C address (CHL8103/04/13)
• Overclocking support with I2C voltage override and Vmax setting
• Flexible I2C bus security features
• I2C security enable pin (CHL8103/04/13)
• Independent loop switching frequencies from 200kHz to 1.2MHz per phase
• IR Efficiency Shaping with Dynamic Phase Control(DPC)
• 1-phase & Active Diode Emulation modes for light load efficiency
• IR Adaptive Transient Algorithm (ATA) on both loops minimizes output bulk capacitors and system cost
• Per-Loop Fault Protection: OVP, UVP, OCP
• Thermal Protection (OTP) and VRHOT# flag (CHL8103/04/13)
• Multiple time programmable (MTP) memory for custom configuration
• Compatible with IR ATL and 3.3V tri-state Drivers
• 3.3V +10%/-15% supply voltage; 0ºC to 85ºC operation
• Pb-Free, RoHS, QFN packages