The ISL6226 provides power control and protection for two user selected output voltages required in high-performance notebook PC applications. The IC integrates a fixed, selectable frequency pulse-width-modulation (PWM) controller and a 3A LDO linear regulator controller with monitoring and protection circuitry in a single 24 lead SSOP package.

特性 Features

? Provides Two Regulated Voltages

- Linear Regulator, User Selected, Current Limited

- High Efficiency PWM Over Wide Line and Load Range

- Synchronous Buck Converter on PWM Output

- Hysteretic Operation at Light Load

? Dual Mode Operation:

- Directly From Battery Input, VIN, of 5.6V to 24V or from VCC of 5V

? PWM Output Adjustable From 0.9V to 0.93*VIN

? Low Drop-Out (LDO) Linear Regulator Operates from Vout+0.5V to 24V

? LDO Output Adjustable

- From 0.8V to 3.8V at 0A to 3A for NPN Transistor

- From 0.8V to 3.0V at 0A to 3A for N-MOSFET

? 300/600kHz Switching Frequency Selectable

? Forced PWM Mode Control Option

? No Current-Sense Resistor Required on PWM Output

- Uses MOSFET’s rDS(ON)

- Optional Current-Sense Resistor for More Precision

? Separate Soft-Start For Both PWM and LDO

? Separate Enable Pins for both PWM and LDO for Advanced Configuration and Power Interface (ACPI)Compatibility

? Input Under voltage Lock-Out (UVLO) Protection

? Excellent Dynamic Response

- Input Voltage Feed-Forward and Current-Mode Control

? Monitors Output Voltages and Provides PGOOD Status

? Thermal Shut-Down Protection

Applications

? Mobile PCs

? Hand-Held Portable Instruments

? Other Devices and Appliances With up to 24V Input