Overview
The TPS54540DDAR is a high-performance, step-down DC-DC converter produced by Texas Instruments. This device is designed to operate with an input voltage range of 4.5 V to 42 V and can deliver an output current of up to 5 A. It features an integrated high-side n-channel MOSFET, which simplifies the design and reduces the need for external components. The TPS54540DDAR implements constant frequency, current mode control, which helps in reducing output capacitance and simplifying external frequency compensation. The device is particularly robust, capable of surviving load dump pulses up to 45 V per ISO 7637, making it suitable for various industrial and automotive applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 42 | V |
| Output Voltage Range | 0.8 to 41.1 | V |
| Output Current | Up to 5 | A |
| Switching Frequency Range | 100 kHz to 2.5 MHz | |
| High-Side MOSFET Resistance | 92 mΩ | |
| Operating Quiescent Current | 146 μA | |
| Shutdown Current | 2 μA | |
| Junction Temperature Range | –40 to 150 | °C |
| Package Type | 8-Terminal HSOP with PowerPAD™ |
Key Features
- Integrated high-side n-channel MOSFET with 92 mΩ resistance.
- Eco-mode™ operation at light loads to improve efficiency by reducing switching and gate drive losses.
- Adjustable UVLO voltage and hysteresis.
- Internal phase-locked loop (PLL) for synchronization to an external clock signal.
- Low dropout at light loads with integrated BOOT recharge FET.
- 0.8 V 1% internal voltage reference.
- High efficiency across a wide range of loads.
Applications
- Industrial Automation and Motor Control.
- Vehicle Accessories: GPS, Entertainment Systems.
- USB Dedicated Charging Ports and Battery Chargers.
- 12 V and 24 V Industrial, Automotive, and Communications Power Systems.
Q & A
- What is the input voltage range of the TPS54540DDAR?
The input voltage range is from 4.5 V to 42 V.
- What is the maximum output current of the TPS54540DDAR?
The maximum output current is up to 5 A.
- What is the switching frequency range of the TPS54540DDAR?
The switching frequency range is from 100 kHz to 2.5 MHz.
- Does the TPS54540DDAR have an integrated MOSFET?
Yes, it has an integrated high-side n-channel MOSFET with 92 mΩ resistance.
- What is the operating quiescent current of the TPS54540DDAR?
The operating quiescent current is 146 μA.
- What is the shutdown current of the TPS54540DDAR?
The shutdown current is 2 μA.
- What is the junction temperature range of the TPS54540DDAR?
The junction temperature range is from –40°C to 150°C.
- What package type does the TPS54540DDAR come in?
The TPS54540DDAR comes in an 8-Terminal HSOP with PowerPAD™ package.
- Does the TPS54540DDAR support synchronization to an external clock signal?
Yes, it has an internal phase-locked loop (PLL) for synchronization to an external clock signal.
- What are some typical applications of the TPS54540DDAR?
Typical applications include Industrial Automation, Motor Control, Vehicle Accessories, USB Charging Ports, and Industrial, Automotive, and Communications Power Systems).
