Digital Multi-Phase Buck Controller 40-Pin QFN EP T/R

The IR3541 and CHL8325 A/B are dual - loop digital multi - phase buck controllers that drive up to 5 phases. The IR3541 and CHL8325A/B are fully Intel VR12 and AMD SVI compliant on both loops and provides a Vtt tracking function for DDR memory. NVM storage saves pins and enable s a small package size. The IR3541 and CHL8325A/B include the IR Efficiency Shaping Technology to deliver exceptional efficiency at minimum cost across the entire load range. IR Variable Gate Drive optimizes the MOSFET gate drive voltage as a function of real - time load current. IR Dynamic Phase Control adds/drops active phases based upon load current. The IR3541 and CHL8325A/B can be configured to enter 1 - phase operation and active 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. The I2C/PMBus interface can communicate with up to 16 IR3541 and CHL8325A/B based VR loops. Device configuration and fault parameters are easily defined using the IR Intuitive Power Designer ( DPDC ) GUI and stored in on - chip NVM. The IR3541 and CHL8325A/B also include numerous features like register diagnostics for fast design cycles and platform differentiation, truly simplifying VRD design and enabling fastest time - to - market with its “set - and - forget” methodology.

• 5- phase dual output PWM Controller
• Phases are flexibly assigned between Loops 1 & 2
• Intel® VR12, AMD® 400kHz & 3.4MHz SVI and Memory modes
• Dual OCP support for I - spike enhanced AMD CPUs
• SMB_Alert Pin for Servers
• PMBus Address pin or Variable Gate Drive (IR3541/ CHL8325A)
• 2nd Temperature Sense for VR12 Desktop (CHL8325B)
• Overclocking & Gaming Mode with Vmax setting
• Switching frequency from 200kHz to 1.2MHz per phase
• IR Efficiency Shaping Features including Variable Gate Drive (IR3541/CHL8325A only) and Dynamic Phase Control
• Programmable 1-phase or 2-phase for Light Loads and Active Diode Emulation for Very Light Loads
• IRAdaptive Transient Algorithm (ATA) on both loops minimizes output bulk capacitors and system cost
• Auto-Phase Detection with auto-compensation
• Per-Loop Fault Protection: OVP, UVP, OCP,OTP, CFP
• I2C/SMBus/PMBus system interface for telemetry of Temperature, Voltage, Current & Power for both loops
• Non-Volatile Memory (NVM) for custom configuration
• Compatible with IRATL and 3.3V Tri -state Drivers
• +3.3V supply voltage; - 20ºC to 85ºC ambient operation
• Pb-Free, RoHS,6x640-pin QFN, MSL2 package