The ISL95908 is a Power Management Integrated Circuit

(PMIC) for ultrabook, notebook and tablet computers powered

by 2-cell Li-ion batteries. It integrates control, MOSFET drivers,

power MOSFETs, fault protection and fault monitoring

functions for 8 highly efficient synchronous buck regulators

and VTT LDO. It is offered in a thermally efficient

5.5mmx5.5mm, 121-bump, 0.5mm pitch WLCSP package.

The PMIC regulators convert system voltage from the battery

or adapter into all platform voltages needed for a typical

computer system including 5V and 3.3V system regulators,

1.8V/2.5V, 1V, 0.975V, 0.9V for controller-hub, peripheral and

core voltages as well as programmable VDDQ and VTT

regulators for DDR3/3U/3L, LPDDR3 and DDR4 voltages. The

switching regulators operate at 1MHz and are based on

Intersil’s proprietary R4™ Technology, which provides high

light-load efficiency, fast transient response, seamless

DCM/CCM transitions and requires no external compensation.

The PMIC provides overcurrent, overvoltage and

over-temperature fault protections and undervoltage and

over-temperature warnings. A temperature alert signal

indicates the PMIC is operating at an elevated temperature

and ALERT indicates if any other fault or warning has occurred.

The PMIC also offers significant I2C capability and can be

configured to provide 8 GPIO pins for additional system

functionality and each regulator has an independent

power-good indicator.

Features

• Highly integrated power management IC

• Efficient 1MHz integrated FET switching regulators

• Internal compensation, no external compensation

• Computer system platform voltage regulators 5V, 3.3V,

1.8V/2.5V, 1V, 0.975V, 0.9V

• Programmable VR3 and VTT regulators for memory

(DDR3/L/U, LPDDR3 and DDR4)

• Extensive fault protection

- Overcurrent protection

- Over-temperature protection

- Overvoltage and undervoltage protection

- Temperature alert signal

• Independent power-good indicator for each regulator

• Independent enable signals for each regulator for maximum

sequencing flexibility

• Low power consumption mode for connected standby

• I2C bus allows system fault monitoring, enable control and

configurable GPIO programming

• Output voltage offset programming through I2C

• Configuration pin provides additional system programming

options

Applications

• Ultrabook, notebook and tablet computers