300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

The ISL6443 is a high-performance, triple-output 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 180° out of phase reducing the RMS input current and ripple voltage.

特性 Features

? Wide Input Supply Voltage Range

- Variable 5.6V to 24V

- Fixed 4.5V to 5.6V

? Three Independently Programmable Output Voltages

? Switching Frequency . . . . . . . . . . . . . . . . . . . . . . . 300kHz

? 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)

? Bidirectional Frequency Synchronization for Synchronizing Multiple ISL6443s

? 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

? QFN Packages:

- QFN - 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 Plus Anneal Available (RoHS Compliant)

Applications

? Power Supplies with Multiple 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