Overview
The TPS54540QDDARQ1 is a 42-V, 5-A step-down DC-DC converter manufactured by Texas Instruments. This device is designed with an integrated high-side N-channel MOSFET and operates using current-mode control, which simplifies external compensation and allows for flexible component selection. It is particularly suited for applications requiring high efficiency and reliability, such as industrial automation, automotive systems, and communications power systems. The device features a wide adjustable switching frequency range from 100 kHz to 2500 kHz, enabling optimization for either efficiency or component size. It also includes an internal phase-locked loop (PLL) for synchronization with an external clock signal.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5 V to 42 V |
| Output Current | Up to 5 A |
| Switching Frequency Range | 100 kHz to 2500 kHz |
| Minimum Output Voltage | 0.8 V |
| High-Side MOSFET Resistance | 92 mΩ |
| Operating Quiescent Current | 146 μA |
| Shutdown Current | 2 μA |
| Operating Temperature Range | –40°C to 150°C |
| Package Type | 8-pin HSOP PowerPAD |
Key Features
- Integrated High-Side MOSFET: Reduces external component count and supports high-efficiency power supply designs.
- Current-Mode Control: Simplifies external compensation and allows for flexible component selection.
- Adjustable Switching Frequency: Allows optimization for either efficiency or component size.
- Internal Phase-Locked Loop (PLL): Synchronizes the power switch turn-on to a falling edge of an external clock signal.
- Eco-mode™ Operation: Improves efficiency at light loads by reducing switching and gate-drive losses.
- Low Dropout Operation: Supports high duty cycles approaching 100% with integrated bootstrap recharge FET.
- Overvoltage Protection (OVP): Minimizes output overvoltage transients by turning off the high-side MOSFET when the output voltage exceeds 106% of the desired output voltage.
- Soft-Start and Tracking: Minimizes inrush currents and provides power supply sequencing during power-up.
- Adjustable UVLO Voltage and Hysteresis: Allows customization of the input start-up voltage threshold.
Applications
- Industrial Automation and Motor Control: Suitable for high-efficiency power supply needs in industrial environments.
- Vehicle Accessories: Used in GPS, entertainment systems, ADAS, and eCall applications in automotive systems.
- USB Dedicated Charging Ports and Battery Chargers: Ideal for charging applications requiring high efficiency and reliability.
- 12-V, 24-V, and 48-V Industrial, Automotive, and Communications Power Systems: Supports a wide range of power system requirements.
Q & A
- What is the input voltage range of the TPS54540QDDARQ1?
The input voltage range is from 4.5 V to 42 V.
- What is the maximum output current of the TPS54540QDDARQ1?
The maximum output current is up to 5 A.
- What is the switching frequency range of the TPS54540QDDARQ1?
The switching frequency range is from 100 kHz to 2500 kHz.
- What is the minimum output voltage of the TPS54540QDDARQ1?
The minimum output voltage is 0.8 V.
- How does the Eco-mode™ operation improve efficiency?
Eco-mode™ improves efficiency at light loads by reducing switching and gate-drive losses.
- What is the purpose of the internal phase-locked loop (PLL)?
The internal PLL synchronizes the power switch turn-on to a falling edge of an external clock signal.
- How does the overvoltage protection (OVP) work?
The OVP minimizes output overvoltage transients by turning off the high-side MOSFET when the output voltage exceeds 106% of the desired output voltage.
- What is the operating temperature range of the TPS54540QDDARQ1?
The operating temperature range is from –40°C to 150°C.
- What type of package does the TPS54540QDDARQ1 come in?
The device comes in an 8-pin HSOP PowerPAD package.
- How does the soft-start feature work?
The soft-start feature slows the output rise time during start-up to reduce inrush current and output voltage overshoot.
