PWM Synchronous Buck Converter
This is a complete simulation based project. Here a Pulse Width Modulation based synchronous DC-DC buck converter was simulated using 0.18um CMOS PTM model.The simulation tool used was LTSpice from Linear Technology.
Features
- Input range 1.8\(\pm\)10%
- Programmable output voltage (1.2V, 0.8V, 1.5V)
- Voltage mode control (due to simplicity and versatile nature)
- 8MHz operation (for low value of inductor and capacitor)
- Peak current detection and protection (value of peak current can be set using an off-chip resistor).
- 93% efficiency @100mA load, 9.3% efficiency @1mA (PFM mode was not added)
- Output voltage accuracy is within 0.1%.
- Softstart for inrush current protection.
- Internal 0.5V bandgap reference.
System architecture
