Data Breif ISL95855 (Intersil)

DATASHEET To request the full datasheet, please visit www.intersil.com/products/isl95855 3+2+1 Voltage Regulator for IMVP8™ CPUs ISL95855 Features Compliant with IMVP8™, the ISL95855 provides a complete • Support Intel serial data bus interface power solution for Intel microprocessors supporting core, • System input power monitor (PSYS) supported graphics and system agent rails. The controller provides • Three output controller control and protection for three Voltage Regulator (VR) outputs. The VR A output can be configured for 3-, 2- or - VR A configurable for 3-, 2-, 1-phase VR design 1-phase operation. VR B is configurable for 2- or 1-phase - VR B configurable for 2-, 1-phase VR design operation and VR C supports 1-phase operation. The address - VR C supports 1-phase VR design options programmable for these three outputs allow for • 0.5% system accuracy over temperature maximum flexibility in support of the IMVP8™ CPU. All three VRs share a common serial control bus to communicate with the • Low supply current in PS4 state CPU and achieve lower cost and smaller board area compared • Supports multiple current sensing methods with a two-chip approach. - Lossless inductor DCR current sensing Based on Intersil’s Robust Ripple Regulator (R3™) technology, - Precision resistor current sensing the R3™ modulator has many advantages compared to traditional modulators. These include faster transient settling • Differential remote voltage sensing time, variable switching frequency in response to load • Programmable SVID address transients and improved light-load efficiency due to diode • Programmable VBOOT voltage at start-up emulation mode with load-dependent low switching frequency. • Resistor programmable address selection, IMAX, slew rate, The ISL95855 has several other key features. The controller switching frequency and droop provides PWM outputs, which support Intel DrMOS power • Adaptive body diode conduction time reduction stages (or similar) and discrete power stages using the Intersil ISL95808 high voltage synchronous rectified buck MOSFET Applications driver. The controller complies with IMVP8™ PS4 power requirements and supports power stages and drivers which • IMVP8 compliant notebooks, desktops, ultrabooks and are compatible. The ISL95855 supports the system input tablets power monitor (PSYS) option. The controller supports either DCR current sensing with a single NTC thermistor for DCR temperature compensation, or more precision through resistor current sensing if desired. All three outputs feature remote voltage sense, programmable IMAX, adjustable switching frequency, OC protection and a single VR_READY power-good indicator.
0.91 VIN = 19V 0.90 0.89 0.88 0.87 V) ( 0.86 T 0.85 OUV 0.84 0.83 V 0.82 IN = 12V V 0.81 IN = 8V 0.800 6 12 18 24 30 36 42 48 54 60 66 IOUT (A)
FIGURE 1. LOAD LINE REGULATION June 16, 2015 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015. All Rights Reserved FN8741.0 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.