MC33063 Buck Boost Inverting Switching Regulator IC
The MC33063 is a versatile DC-DC converter IC designed to perform step-up (boost), step-down (buck), and voltage-inverting functions with minimal external components. Developed by ON Semiconductor (originally Motorola), this monolithic IC integrates a high-performance switch transistor, precision reference, and oscillator—making it a cost-effective and compact solution for efficient power conversion.
Operating over a wide input voltage range and providing excellent regulation characteristics, the MC33063 is widely used in battery-powered, industrial, and automotive applications requiring flexible and efficient voltage conversion.
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Features:-
- Wide Input Voltage Range: 3 V to 40 V
- High Output Switch Current: Up to 1.5 A
- Adjustable Output Voltage
- Oscillator Frequency Up to 100 kHz
- Precision Internal Reference: 2%
- Short-Circuit Current Limiting
- Low Standby Current
Specification:-
| Symbol | Parameters | Min | Max | Units |
| VCC | Supply voltage | 40 | V | |
| VIR | Comparator inverting input voltage range | -0.3 | 40 | V |
| VC (Switch) | Switch collector voltage | 40 | V | |
| VE(switch) | Switch emitter voltage | 40 | V | |
| VCE(switch) | Switch collector to switch emitter voltage | 40 | V | |
| VC(driver) | Driver collector voltage | 40 | V | |
| IC(driver) | Driver collector current | 100 | mA | |
| ISW | Switch current | 1.5 | A | |
| TJ | Operating virtual junction temperature | 150 | °C | |
| Tstg | Storage temperature range | -65 | 150 | °C |
Applications
- DC-DC converters (Buck, Boost, or Inverting)
- Battery-powered equipment
- Power supplies for microcontrollers and logic circuits
- Portable and automotive electronics
- Industrial control systems
- Instrumentation and communication systems
*Product image for illustration purposes only, actual product may vary.








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