The ISL95874, ISL95875, ISL95876 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. The ISL95875 and ISL95876 are low-cost solutions 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 (ISL95875, ISL95876) 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.

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 ISL95875 and ISL95876

- 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

• Mobile PC Graphical Processing Unit VCC Rail

• Mobile PC I/O Controller Hub (ICH) VCC Rail

• Mobile PC Memory Controller Hub (GMCH) VCC Rail