ISL95870BHRZ Datasheet PDF - Intersil

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