The MC34167, MC33167 series are high performance fixed frequency power switching regulators that contain the primary functions required for dc–to–dc converters. This series was specifically designed to be incorporated in step–down and voltage–inverting configurations with a minimum number of external components and can also be used cost effectively in step–up applications.

•Output Switch Current in Excess of 5.0 A
•Fixed Frequency Oscillator (72 kHz) with On–Chip Timing
•Provides 5.05 V Output without External Resistor Divider
•Precision 2% Reference
•0% to 95% Output Duty Cycle
•Cycle–by–Cycle Current Limiting
•Undervoltage Lockout with Hysteresis
•Internal Thermal Shutdown
•Operation from 7.5 V to 40 V
•Standby Mode Reduces Power Supply Current to 36 µA
•Economical 5–Lead TO–220 Package with Two Optional Leadforms
•Also Available in Surface Mount D2PAK Package