Triple Output Controller with 1A Standard Buck PWM and Dual LDOs

The ISL8501 is a high-performance, triple output controller that provides a single, high frequency power solution for a variety of point of load applications. The ISL8501 integrates a 1A standard buck PWM controller and switching MOSFET with two 500mA LDOs.

Features

• Standard Buck Controller with Integrated Switching Power MOSFET and Dual LDOs

• Integrated Boot Diode

• Input Voltage Range

- Fixed 5V ±10

- Variable 6V to 25V

• PWM Output Voltage Adjustable from 0.6V to 20V with Continuous Output Current up to 1A

• Voltage Mode Control with Voltage Feed Forward

• Fixed 500kHz Switching Frequency

• Externally Adjustable Soft-Start Time

• Output Undervoltage Protection

• Dual LDO Adjustable Options

- LDO1, 0.6V to 4.2V . . . . . . . . . . . . . . . . . . . . . . 500mA

- LDO2, 0.6V to 4.2V . . . . . . . . . . . . . . . . . . . . . . 500mA

• Individual Enable Inputs

• Two PGOOD Outputs (PWM and both LDOs)

• Overcurrent Protection

• Thermal Overload Protection

• Internal 5V LDO regulator

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• General Purpose

• WLAN Cards-PCMCIA, Cardbus32, MiniPCI CardsCompact Flash Cards

• Hand-Held Instruments