The ISL6271A is a versatile power management IC (PMIC) designed for the Xscale type of processors. The device integrates three regulators, two fault indicators and an I2C bus for communication with a host microprocessor. Two of the three regulators function as low power, low drop out regulators, designed to power SRAM and phase-lock loop circuitry internal to the Xscale processor. The third regulator uses a proprietary switch-mode topology to power the processor core and facilitate Dynamic Voltage Management (DVM), as defined by Intel.

Features

• Three Voltage Regulators (1 Buck, 2 LDOs)

• High-Efficiency, fully-Integrated synchronous buck regulator with DVM

• 800mA DC output current for the buck regulator

• Proprietary ‘Synthetic Ripple’ Control Topology

• Greater than 1MHz Switching Frequency

• Diode emulation for light load efficiency

• I2C Interface Module for DVM from 0.85V to 1.6V

• Optional fixed 4-bit VID-control in lieu of DVM

• Small Output Inductor and Capacitor

• Battery Fault signal

• Input Supply Voltage Range: 2.76V-5.5V

• 4x4 mm QFN Package:

- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves PCB efficiency and has a thinner profile

• Pb-free Available (RoHS Compliant)

Applications

• PDA

• Cell Phone

• Tablet Devices

• Embedded Processors