The uP1539 is a single phase PWM controller with integrated high-current MOSFET driver. It can work with either 5V or 12V supplies and converts 1.5V to 19V power input. The bootstrap diode is built-in to simplify the circuit design and minimize external part count.

The uP1539 implements voltage mode control loop with fast transient response. High light-load efficiency is achieved by the single control loop. The operation frequency is programmable up to 1000kHz. The uP1539 provides a programmable dual level overcurrent protection. The current information is monitored across the inductor DCR. Other features include pre-bias internal soft-start, power OK indication, UVP, OVP and OTP. With aforementioned functions, this part provides a compact, high efficiency, well-protected and cost-effective solutions. This part is available in WQFN3x3 – 16L package.

• Power Supplies for Microprocessors or Subsystem Power Supplies
• Cable Modems, Set Top Boxes, and DSL Modems
• Industrial Power Supplies; General Purpose Supplies
• Low-Voltage Distributed Power Supplies
• 5V or 12V General DC-DC Controller