Overview
The TPS54202HDDCT from Texas Instruments is a high-performance, synchronous step-down (buck) voltage converter designed to operate with a wide input voltage range of 4.5V to 28V and deliver a continuous output current of up to 2A. This device integrates two n-channel MOSFETs, significantly reducing the external component count and enhancing power density. The TPS54202H features a fixed 500-kHz switching frequency, advanced Eco-mode™ for high efficiency at light loads, and various protection mechanisms including overcurrent, overvoltage, and thermal shutdown. The small SOT-23 (6) package makes it ideal for applications requiring high power density and a small footprint on the PCB.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 - 28 | V |
| Output Current | Up to 2 | A |
| High-Side MOSFET On Resistance | 148 | mΩ |
| Low-Side MOSFET On Resistance | 78 | mΩ |
| Switching Frequency | 500 | kHz |
| Shutdown Quiescent Current | 2 | μA |
| Quiescent Current (Non-Switching) | 45 | μA |
| Soft-Start Time | 5 | ms |
| Thermal Shutdown Temperature | 155 | °C |
| Package Type | SOT-23 (6) |
Key Features
- Wide input voltage range of 4.5V to 28V
- Integrated 148-mΩ high-side and 78-mΩ low-side MOSFETs for high efficiency
- Fixed 500-kHz switching frequency
- Advanced Eco-mode™ for high efficiency at light loads
- Internal 5-ms soft-start to minimize inrush currents
- Overcurrent protection with hiccup mode
- Overvoltage protection to minimize output voltage overshoot
- Thermal shutdown protection
- Small SOT-23 (6) package for high power density and small footprint
Applications
- 12-V and 24-V distributed power-bus supplies
- Industrial applications, such as white goods
- Consumer electronics, including audio equipment, set-top boxes (STB), and digital TVs (DTV)
- Printers and other high-power density applications
Q & A
- What is the input voltage range of the TPS54202H?
The input voltage range is 4.5V to 28V. - What is the maximum output current of the TPS54202H?
The maximum output current is up to 2A. - What is the switching frequency of the TPS54202H?
The switching frequency is fixed at 500 kHz. - What protection mechanisms are included in the TPS54202H?
The device includes overcurrent protection, overvoltage protection, and thermal shutdown protection. - What is the purpose of the Eco-mode™ in the TPS54202H?
The Eco-mode™ is designed to operate in pulse-skipping mode at light load currents to boost efficiency. - What is the soft-start time of the TPS54202H?
The internal soft-start time is 5 ms. - What is the thermal shutdown temperature of the TPS54202H?
The thermal shutdown temperature is typically 155°C. - What package type is the TPS54202H available in?
The device is available in a SOT-23 (6) package. - How does the overvoltage protection work in the TPS54202H?
The overvoltage protection minimizes output voltage overshoot by comparing the FB pin voltage to internal thresholds and turning off the high-side MOSFET if the voltage exceeds 108% of the nominal voltage. - What is the quiescent current when the device is not switching?
The quiescent current is typically 45 μA when not switching and under no load.
