ISL95870BIRZ-T

ISL95870BIRZ-T is a PWM DC/DC controller with VID inputs for portable GPU core-voltage regulator. It is a low-cost solution for applications requiring dynamically selected slew-rate controlled output voltages. The soft-start and dynamic setpoint slew-rates are capacitor programmed. Voltage identification logic-inputs select four resistor-programmed setpoint reference voltages that directly set the output voltage of the converter between 0.5V and 1.5V, and up to 5V with a feedback voltage divider. Compared with R modulator, the R4 modulator has equivalent light-load efficiency, faster transient performance, accurately regulated frequency control and all internal compensation. Applications include mobile PC graphical processing unit VCC rail, mobile PC I/O controller hub VCC rail, mobile PC memory controller hub VCC rail.

• Precision regulation, proprietary R4™ frequency control loop
• Optimal transient response, intersil’s R4™ modulator technology
• Output remote sense
• Extremely flexible output voltage programmability
• 2-Bit VID selects four independent setpoint voltages
• Simple resistor programming of setpoint voltages
• Automatic diode emulation mode for highest efficiency
• Power-good monitor for soft-start and fault detection
• Switching frequency accuracy range from -15 to +15% (PWM Mode = CCM)
• 20 lead QFN package, temperature range from -40 to +100°C