LTC1504A

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


Application

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


Pinout




Specifications

Supply Voltage (V_CC to GND) ................................... 10V
Peak Output Current (SW) .......................................±1A
Input Voltage (All Other Pins) ...... 0.3V to (V_CC + 0.3V)
Operating Temperature Range
    LTC1504AC ............................................. 0°C to 70°C
    LTC1504AI ......................................... 40°C to 85°C
Storage Temperature Range ................. 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C


Description

The LTC^®1504A is a self-contained, high efficiency synchronous buck switching regulator. It includes a pair of on-chip 1.3W 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.The LTC1504A is available in adjustable and fixed 3.3V output versions. An adjustable current limit circuit provides protection from overloads. The internal 1% reference combined with a sophisticated voltage feedback loop provides optimum output voltage accuracy and fast load transient response. The LTC1504A is specified to operate with input voltages between 4V and 10V. Contact the LTC factory for guaranteed specifications at 2.7V supply.The LTC1504A is a pin-compatible, functional upgrade to the LTC1504.The LTC1504A is available in a plastic SO-8 package.