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1.4MHz Dual, 180¡ã Out-of-Phase, Step-Down PWM Controller

The ISL6445 is a high-performance, dual-output PWM controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0.8V. The two PWMs are synchronized 180o out-of-phase reducing the RMS input current and ripple voltage.

Features

? Wide Input Supply Voltage Range

- 5.6V to 24V

- 4.5V to 5.6V

? Two Independently Programmable Output Voltages

? Switching Frequency . . . . . . . . . . . . . . . . . . . . . . .1.4MHz

? Out-of-Phase PWM Controller Operation

- Reduces Required Input Capacitance and Power Supply Induced Loads

? No External Current Sense Resistor

- Uses Lower MOSFET¡¯s rDS(ON)

? Programmable Soft-Start

? Extensive Circuit Protection Functions

- PGOOD

- UVLO

- Overcurrent

- Over-temperature

- Independent Shutdown for Both PWMs

? Excellent Dynamic Response

- Voltage Feed-Forward with Current Mode Control

? Pb-Free (RoHS Compliant)

Applications

? Power Supplies with Two Outputs

? xDSL Modems/Routers

? DSP, ASIC, and FPGA Power Supplies

? Set-Top Boxes

? Dual Output Supplies for DSP, Memory, Logic, ?P Core and I/O

? Telecom Systems