TPS40222DRPR

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. The TPS40222 is a fixed frequency PWM controller incorporating an internal high-side MOSFET switch and is intended for non-synchronous converter applications requiring load current of up to 1.6 A.

Applications

• Disk Drives
• Set Top Box
• Point of Load Power
• ASIC Power Supplies

Key features

• 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 mΩ 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