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Advanced Power Electronics Corp. recently introduced a new pulse width modulated (PWM) dual synchronous buck controller APU3146. This is a driver IC for point-of-load (POL) buck converters. Typical applications include dual phase ASIC and DDR memory power management circuits, datacom, telecommunications, and PC Power related power supplies requiring multiple outputs. The APU3146 is an ideal PWM IC for two-phase single- or dual-output synchronous buck converter applications. In single output two-phase applications, this solution can deliver up to 30A. In applications where two separate voltages are required, this solution will deliver up to 15A per output.

The product features for APU3146 include

• Dual Synchronous Controller with 180O out-of-phase
• Current Sharing Using Inductor's DCR
• Current Limit using MOSFET's RDS(ON)
• Hiccup/Latched Current Limit
• Latched Over-Voltage Protection
• Programmable Switching Frequency up to 500KHz
• Two Independent Soft-Starts/ Shutdowns
• 0.8V Precision Reference Voltage Available
• Power Good Output
• External Frequency Synchronization