Description:

Overview:

The APW7063 is a versatile synchronous buck PWM and linear controller designed to provide two regulated voltages. It integrates PWM and linear controller, monitoring, and protection functions into a single package, making it suitable for applications such as graphic cards, memory power supplies, DSL or cable modems, set-top boxes, and low-voltage distributed power supplies.

Key Features:

• Provides two regulated voltages
  • Synchronous Rectified Buck PWM Controller
  • Linear Controller
• Fast transient response with 0-85% duty ratio
• Excellent output voltage regulation
  • 0.8V internal reference
  • ±1% over line voltage and temperature
• Overcurrent protection through sensing low-side MOSFET's RDS(ON)
• Undervoltage lockout
• Small converter size
  • 250kHz free-running oscillator
  • Programmable from 70kHz to 800kHz
• 14-Lead SOIC package
• Lead-free and green devices available (RoHS compliant)

The APW7063 offers excellent regulation for output load variation and includes a temperature-compensated 0.8V internal reference voltage designed for various low-output voltage applications. It features a 250kHz free-running triangle-wave oscillator adjustable from 70kHz to 800kHz. The controller has overcurrent protection achieved by monitoring the voltage drop across the low side MOSFET, eliminating the need for a current sensing resistor.