DESCRIPTION
The LTC®1504A is a self-contained, high efficiency synchronous buck switching regulator. It includes a pair of on-chip 1.3Ω power switches, enabling it to supply up to 500mA of load current. Efficiency peaks at 92%, minimizing heat and wasted power. The synchronous buck architecture allows the output to source or sink current as required to keep the output voltage in regulation. 100% duty cycle operation minimizes dropout voltage.

FEATURES
■ 500mA Output Current at 3.3V Output
■ Up to 92% Peak Efficiency
■ 100% Maximum Duty Cycle
■ Internal Reference Trimmed to 1%
■ Output Can Source or Sink Current
■ Requires as Few as Four External Components
■ Input Voltage Range: 4V to 10V
■ Adjustable Current Limit
■ Small SO-8 Package
■ 200kHz Switching Frequency Can Typically be Synchronized Up to 500kHz

APPLICATIONS
■ Small Portable Digital Systems
■ Active Termination
■ Auxiliary Output Voltage Supplies
■ Minimum Part Count/Size Switchers