DESCRIPTION
The LT1076-5 is a 2A fixed 5V output monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, all current limit components, and an output monitor are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1076-5 to drive a tapped inductor in the buck mode with output currents up to 4A.

FEATURES
■ Fixed 5V Output
■ 2A On-Board Switch
■ 100kHz Switching Frequency
■ 2% Output Voltage Tolerance Over Temperature
■ Greatly Improved Dynamic Behavior
■ Available in Low Cost 5-Lead Package
■ Only 9.5mA Quiescent Current
■ Operates Up to 60V Input

APPLICATIONS
■ 5V Output Buck Converter
■ Tapped Inductor Buck Converter with 4A Output at 5V
■ Positive-to-Negative Converter