The MC34163 series are monolithic power switching regulators that contain the primary functions required for dc-to-dc converters. This series is specifically designed to be incorporated in step-up, step-down, and voltage-inverting applications with a minimum number of external components. These devices consist of two high gain voltage feedback comparators, temperature compensated reference, controlled duty cycle oscillator, driver with bootstrap capability for increased efficiency, and a high current output switch. Protective features consist of cycle-by-cycle current limiting, and internal thermal shutdown. Also included is a low voltage indicator output designed to interface with microprocessor based systems. These devices are contained in a 16 pin dual-in-line heat tab plastic package for improved thermal conduction. Output Switch Current in Excess of 3.0 A, Operation from 2.5 V to 40 V Input, Low Standby Current, Precision 2% Reference, Controlled Duty Cycle Oscillator, Driver with Bootstrap Capability for Increased Efficiency, Cycle-by-Cycle Current Limiting, Internal Thermal Shutdown Protection, Low Voltage Indicator Output for Direct Microprocessor Interface, Heat Tab Power Package, Moisture Sensitivity Level (MSL) Equals 1.