PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator
●The ISL95870, ISL95870A, ISL95870B ICs are Single-Phase Synchronous-Buck PWM regulators
●featuring Intersil’s proprietary R4 Technology™. The wide 3.3V to 25V input voltage range is ideal for systems that run on battery or AC-adapter power sources.
●Features
●• Input Voltage Range: 3.3V to 25V
●• Output Voltage Range: 0.5V to 5V
●• Precision Regulation
●\- Proprietary R4™ Frequency Control Loop
●\- ±0.5% System Accuracy Over -10°C to +100°C
●• Optimal Transient Response
●\- Intersil’s R4™ Modulator Technology
●• Output Remote Sense
●• Extremely Flexible Output Voltage Programmability
●\- 2-Bit VID Selects Four Independent Setpoint Voltages for ISL95870B
●\- 2-Bit VID Selects Four Dependent or Three Independent Setpoint Voltages for ISL95870A
●\- Simple Resistor Programming of Setpoint Voltages
●• Selectable 300kHz, 500kHz, 600kHz or 1MHz PWM Frequency in Continuous Conduction
●• Automatic Diode Emulation Mode for Highest Efficiency
●• Power-Good Monitor for Soft-Start and Fault Detection
●Applications
●(see page 26)
●• Mobile PC Graphical Processing Unit VCC Rail
●• Mobile PC I/O Controller Hub (ICH) VCC Rail
●• Mobile PC Memory Controller Hub (GMCH) VCC Rail
