Overview
The TPS54140DGQR, produced by Texas Instruments, is a 42-V, 1.5-A step-down (buck) DC-DC converter with an integrated high-side n-channel MOSFET. This device is designed to provide high efficiency and flexible component selection, making it suitable for a variety of power management applications. The TPS54140 features a wide input voltage range of 3.5 V to 42 V and an adjustable output voltage. It incorporates a constant-frequency, current mode control which simplifies external frequency compensation and reduces output capacitance requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3.5 to 42 | V |
| Output Current | 1.5 | A |
| High-Side MOSFET Resistance | 200 | mΩ |
| Switching Frequency Range | 100 kHz to 2.5 MHz | |
| Operating Quiescent Current | 116 | µA |
| Shutdown Current | 1.3 | µA |
| Internal Voltage Reference | 0.8 | V |
| Package Type | MSOP-10-EP | |
| Junction-to-Ambient Thermal Resistance | 67.4 | °C/W |
Key Features
- High efficiency at light loads with a pulse-skipping Eco-mode™.
- Adjustable switching frequency (100 kHz to 2.5 MHz) for efficiency and size optimization.
- Synchronizes to an external clock using the RT/CLK pin.
- Adjustable slow start and sequencing using the SS/TR pin.
- Undervoltage lockout (UVLO) with adjustable voltage and hysteresis.
- Power-good output (PWRGD) indicating output voltage within 94% to 107% of the nominal voltage.
- Thermal shutdown and frequency foldback for overload protection.
- Supported by WEBENCH software tool for design and development).
Applications
- Power management in industrial and automotive systems where high input voltage and high efficiency are required.
- Point-of-load (POL) power supplies in various electronic devices.
- Battery-powered systems needing efficient DC-DC conversion.
- Telecommunication and networking equipment.
- Medical devices requiring reliable and efficient power conversion.
Q & A
- What is the input voltage range of the TPS54140DGQR?
The input voltage range is from 3.5 V to 42 V.
- What is the maximum output current of the TPS54140DGQR?
The maximum output current is 1.5 A.
- What is the resistance of the high-side MOSFET in the TPS54140DGQR?
The high-side MOSFET resistance is 200 mΩ.
- What is the switching frequency range of the TPS54140DGQR?
The switching frequency range is from 100 kHz to 2.5 MHz.
- How does the TPS54140DGQR handle thermal overload?
The device features thermal shutdown and frequency foldback for overload protection.
- What is the purpose of the SS/TR pin in the TPS54140DGQR?
The SS/TR pin is used for adjustable slow start and sequencing, and to minimize inrush currents during power-up.
- How does the TPS54140DGQR indicate power-good status?
The device uses an open-drain power-good output (PWRGD) that indicates when the output voltage is within 94% to 107% of the nominal voltage.
- What is the operating quiescent current of the TPS54140DGQR?
The operating quiescent current is 116 µA.
- What is the shutdown current of the TPS54140DGQR?
The shutdown current is 1.3 µA.
- Is the TPS54140DGQR supported by any design tools?
Yes, it is supported by the WEBENCH software tool.
