DIGITAL POL BUCK CONTROLLER with I2C AND PMBus IR36021 Interface FEATURES DESCRIPTION Dual output (2+1) Digital Controller with proprietary The IR36021 is a dual loop digital multi phase buck controller designed for point of load applications. control algorithm Twophase operation available on Output 1 for The IR36021 include Efficiency Shaping Technology to powering very high current ASICs and DSPs deliver exceptional efficiency at minimum cost across the I2C /PMBus interface for configuration & telemetry entire load range. Dynamic Phase Control adds/drops with pin programmable address active phases based upon load current and can be configured to enter 1phase operation and diode emulation 0 0 Operating ambient temperature: 40 C to 85 C mode automatically or by command. 3.3V bias operation IRs unique Adaptive Transient Algorithm (ATA), based on Independent loop switching frequencies from 200kHz proprietary nonlinear digital PWM algorithms, minimizes to 2MHz per phase output bulk capacitors and Multiple Time Programmable IR Efficiency Shaping with Dynamic Phase Control (MTP) storage saves pins and enables a small package size. (DPC) Device configuration and fault parameters are easily Active Diode Emulation modes for light load efficiency defined using the IR Intuitive Power Designer (IPD) GUI and stored in onchip MTP. IR Adaptive Transient Algorithm (ATA) minimizes output bulk capacitors and system cost The IR36021 provides extensive OVP, UVP, OCP and OTP Independent OVP, UVP, OCP for each output fault protection and includes thermistor based temperature sensing with VRHOT signal. Thermal Protection (OTP) and VRHOT flag Multiple time programmable (MTP) memory for The IR36021 includes numerous features like register custom configuration diagnostics for fast design cycles and platform differentiation, truly simplifying VRD design and enabling Flexible I2C bus security features fastest time tomarket (TTM) with set and forget PbFree, RoHS, 32 pin 5mm X 5mm QFN package methodology. APPLICATIONS Embedded Telecom Systems Netcom Applications Server Application Distributed Point of Load Power Architectures PIN DIAGRAM BASIC APPLICATION Figure 2: IR36021 Package Top View Figure 1: IR36021 Basic Application Circuit 1 November 29, 2017 Rev 3.6 VINSEN RCSM1 NC RCSP1 VRHOT ICRIT IRTN1a EN1 ISEN1a ADDR PROT IRTN1b SM ALERT ISEN1b SM DIO IRTN2 SM CLK ISEN2DIGITAL POL BUCK CONTROLLER with I2C AND PMBus IR36021 Interface PIN DIAGRAM 32 31 30 29 28 27 26 25 PGood2 1 24 RCSP2 2 23 VSEN1 RCSM2 VRTN1 3 22 VCC RRES 4 21 VSEN2 32 Pin 5x5 QFN 5 20 Top View VRTN2 TSEN 6 19 V18A PWM2 7 18 PGood1 PWM1b 33 GND 8 17 EN2 PWM1a 9 10 11 12 13 14 15 16 Figure 3: IR36021 Package Bottom View 5mm X 5mm QFN ORDERING INFORMATION Package Tape and Reel Qty Part Number M 3000 IR36021MTRPbF 2 November 29, 2017 Rev 3.6