| Vin (Min) (V) | 4.5 |
| Vin (Max) (V) | 18 |
| Vout (Min) (V) | 0.76 |
| Vout (Max) (V) | 7 |
| Iout (Max) (A) | 2 |
| Iq (Typ) (uA) | 800 |
| Switching frequency (Min) (kHz) | 700 |
| Switching frequency (Max) (kHz) | 700 |
| Features | Enable, Light Load Efficiency, Synchronous Rectification, Soft Start Adjustable |
| Rating | Catalog |
| Regulated outputs (#) | 1 |
| Control mode | D-CAP2 |
| Duty cycle (Max) (%) | 65 |
- D-CAP2? Mode Enables Fast Transient Response
- Low Output Ripple and Allows Ceramic Output Capacitor
- Wide VIN Input Voltage Range: 4.5 V to 18 V
- Output Voltage Range: 0.76 V to 7 V
- Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
– 155 mΩ (High-Side) and 108 mΩ (Low-Side) - High Efficiency, Less than 10 μA at Shutdown
- High Initial Bandgap Reference Accuracy
- Adjustable Soft Start
- Prebiased Soft Start
- 700-kHz Switching Frequency (fSW)
- Cycle-by-Cycle Overcurrent Limit
- Auto-Skip Eco-Mode? for High Efficiency at Light Load
The TPS54228 device is an adaptive on-time D-CAP2? mode synchronous buck converter. The TPS54228 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54228 uses the D-CAP2? mode control that provides a fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-Mode? operation at light loads. Eco-Mode? allows the TPS54228 to maintain high efficiency during lighter load conditions. The TPS54228 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft start time. The TPS54228 is available in 8-pin SO , 8-pin SOIC, and 10-pin VSON packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.
