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 in corporated 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. These devices consist of an internal temperature compensated reference, fixed frequency oscillator with on−chip timing components, latching pulse width modulator for single pulse metering, high gain error amplifier, and a high current output switch. Protective features consist of cycle−by−cycle current limiting, undervoltage lockout, and thermal shutdown. Also included is a low power standby mode that reduces power supply current to 36 mA.
Features:-
• 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 36mA.
• Economical 5−Lead TO−220 Package with Two Optional Leadforms.
• Also Available in Surface Mount D2PAK Package.
• Moisture Sensitivity Level (MSL) Equals 1.
• Pb−Free Packages are Available.
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