General Description
   The XR77128 is a quad channel digital Pulse Width Modulated (PWM) step down (buck) controller. A wide 4.75V to 5.5V and 5.5V to 25V input voltage range allows for single supply operation from standard power rails.

FEATURES
◾ Quad Channel Step-down Controller
   □ Digital PWM 105kHz-1.23MHz Operation
   □ Individual Channel Frequency Selection
   □ Patented digital PFM with Ultrasonic mode
   □ Patented Over Sampling Feedback
   □ Programmable 5 coefficient PID control
   □ Integrated MOSFET Drivers
   □ Supports DrMOS devices
◾ 4.75V to 5.5V and 5.5V to 25V Input Voltage
◾ 0.6V to 5.5V Output Voltage (higher with external feedback resistors)
◾ SMBus Compliant I2C Interface
◾ Full Power Monitoring and Reporting
◾ 3 x 15V Capable PSIO + 2 x GPIOs
◾ Full Start/Stop Sequencing Support
◾ Built-in Thermal, Over-Current, UVLO and Output Over-Voltage Protections
◾ On Board 5V and LDOOUT Standby LDOs
◾ On Board Non-Volatile Memory
◾ Supported by PowerArchitect™ 5.2 or later

APPLICATIONS
◾ Industrial Control Systems
◾ Automatic Test Equipment
◾ Video Surveillance Systems
◾ Automotive Infotainment