采用 3mm SON 封裝的 1.6A 1.25MHz 降壓轉換器
| Vin (Min) (V) | 4.5 |
| Vin (Max) (V) | 8 |
| Vout (Min) (V) | 0.8 |
| Vout (Max) (V) | 7 |
| Iout (Max) (A) | 1.6 |
| Iq (Typ) (uA) | 1000 |
| Switching frequency (Min) (kHz) | 1250 |
| Switching frequency (Max) (kHz) | 1250 |
| Features | UVLO Fixed |
| Rating | Catalog |
| Regulated outputs (#) | 1 |
| Control mode | Current Mode |
| Duty cycle (Max) (%) | 90 |
- Input Voltage Range 4.5 VDC to 8 VDC
- Output Voltage (0.8 V to 90% VIN)
- 0 A to 1.6 A Current Capability
- Fixed 1.25-MHz Switching Frequency
- Reference 0.8 V ±1%
- Internal 250 m
N-Channel MOSFET Switch - Current Mode Control with Internal Slope Compensation
- Internal Soft-Start
- Internal Loop Compensation
- Short Circuit Protection
- Thermal Shutdown
- High Efficiency Up to 92%
- Small 3 mm × 3 mm SON Package
- APPLICATIONS
- Disk Drives
- Set Top Box
- Point of Load Power
- ASIC Power Supplies
The TPS40222 is a fixed-frequency, current-mode, non-synchronous buck converter optimized for applications powered by a 5-V distributed source. With internally determined operating frequency, soft-start time, and control loop compensation, the TPS40222 provides many features with a minimum of external components.
The TPS40222 operates at 1.25 MHz and supports up to 1.6-A output loads. The output voltage can be programmed to as low as 0.8 V. The TPS40222 utilizes pulse-by-pulse current limit as well as frequency foldback to protect the converter during a catastrophic short circuited output condition.
