Data Short ISL95836 (Intersil)

DATASHEET To request the full datasheet, please visit www.intersil.com/products/ISL95836 Dual 3+2 PWM Controller for IMVP-7/VR12™ CPUs ISL95836 Features The ISL95836 Pulse Width Modulation (PWM) controller IC • Serial Data Bus provides a complete solution for IMVP-7/VR12™ compliant • Dual Outputs: microprocessor and graphic processor core power supplies. It - Configurable 3-, 2- or 1-phase for the 1st Output Using Two provides the control and protection for two Voltage Regulators Integrated Gate Drivers (VRs). The first VR, typical for Vcore, incorporates 2 integrated - Configurable 2- or 1-phase for the 2nd Output Using One drivers and can operate in 3-, 2- or 1-phase configurations. The Integrated Gate Driver second VR, typical for graphics, incorporates 1 integrated driver and can operate in 2- or 1-phase configurations. The two • R3 Modulator VRs share a serial control bus to communicate with the CPU and - Excellent Transient Response achieve lower cost and smaller board area compared with the - High Light Load Efficiency two-chip approach. • 0.5% System Accuracy Over-Temperature Both VRs utilize Intersil’s Robust Ripple Regulator R3 • Supports Multiple Current Sensing Methods Technology™. The R3 modulator has numerous advantages - Lossless Inductor DCR Current Sensing compared to traditional modulators, including faster transient - Precision Resistor Current Sensing response, variable switching frequency during load transients, and improved light load efficiency due to its ability to • Differential Remote Voltage Sensing automatically change switching frequency. • Programmable VBOOT Voltage at Start-up The ISL95836 has several other key features. Both outputs • Resistor Programmable IMAX, Switching Frequency for Both support either DCR current sensing with a single NTC Outputs thermistor for DCR temperature compensation, or more • Adaptive Body Diode Conduction Time Reduction precise resistor current sensing if desired. Both outputs come with remote voltage sense, programmable V Applications BOOT voltage, IMAX, and switching frequency, adjustable overcurrent • IMVP-7/VR12 Compliant Computers protection and separate Power-Good signals.
Vin VR2 ISL6208 DRIVER Vin 0.91 VIN = 19V 0.90 0.89 0.88 ) 0.87 Vin V ( 0.86 T VR1 OU 0.85 ISL95836 ISL6208 V DRIVER 0.84 0.83 VIN = 12V 0.82 Vin V 0.81 IN = 8V 0.800 6 12 18 24 30 36 42 48 54 60 66 IOUT (A) Vin
FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT FIGURE 2. LOAD LINE REGULATION March 14, 2012 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. FN7835.1 1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011, 2012. All Rights Reserved Intersil (and design) and R3 Technology™ are trademarks owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners.