GENERAL DESCRIPTION
   The AP1501 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.

FEATURES
• 3.3V, 5V, 12V, and adjustable output versions
• Adjustable version output voltage range, 1.2V to 37V
• ±4% max over line and load conditions
• Available in TO-220 and TO-263 packages
• Guaranteed 3A output load current
• Input voltage range up to 40V
• Requires only 4 external components
• Excellent line and load regulation specifications
• 150 kHz fixed frequency internal oscillator
• TTL shutdown capability
• Low power standby mode, IQ typically 80 µA
• High efficiency
• Uses readily available standard inductors
• Thermal shutdown and current limit protection

APPLICATIONS
• Simple high-efficiency step-down (buck) regulator
• On-card switching regulators
• Positive to negative converter