General Description
The AP1503 series are monolithic ICs designed for step-down DC/DC converters, and own the ability of driving a 2.5A load without additional transistor components. Due to reducing the number of external component, the board space can be saved easily. The external shutdown function can be controlled by logic level and then come into standby mode. The external compensation makes feedback control have good line and load regulation.

FEATUREs
   - Output voltage: 3.3V
   - 300KHz +15% fixed switching frequency
   - Voltage mode non-synchronous PWM control
   - Thermal-shutdown and current-limit protection
   - ON/OFF shutdown control input
   - Operating voltage can be up to 22V
   - Output load current: 2.5A
   - SOP-7L packages
   - Low power standby mode
   - Built-in switching transistor on chip

APPLICATIONs
   - Simple High-efficiency step-down regulator
   - On-card switching regulators
   - Positive to negative converter
   - DSL Modems
   - Portable Computers
   - Regulated Wall Adapters
   - Distributed Power