Overview
The TPS54540B-Q1 device from Texas Instruments is a 42-V, 5-A, step-down regulator with an integrated high-side MOSFET. This device is designed to survive load-dump pulses up to 65 V per ISO 7637, making it suitable for demanding applications. It features current mode control, which provides simple external compensation and flexible component selection. The regulator operates in a pulse-skipping Eco-mode at light loads to improve efficiency by reducing switching and gate drive losses. It is available in an 8-pin thermally-enhanced HSOP PowerPAD package and is qualified for automotive applications, adhering to AEC-Q100 standards.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5 V to 42 V |
| Output Current | Up to 5 A |
| High-Side MOSFET Resistance | 92 mΩ |
| Operating Quiescent Current | 146 μA |
| Shutdown Current | 2 μA |
| Switching Frequency Range | 100 kHz to 2.5 MHz |
| UVLO Voltage (Default) | 4.3 V |
| Internal Voltage Reference | 0.8 V ± 1% |
| Operating Temperature Range | –40°C to 125°C Ambient, –40°C to 150°C Junction |
| Package Type | 8-Pin HSOP PowerPAD |
Key Features
- Qualified for Automotive Applications and AEC-Q100 compliant
- High-Efficiency at Light Loads With Pulse-Skipping Eco-mode™
- 92-mΩ High-Side MOSFET
- Low Dropout at Light Loads With Integrated BOOT Recharge FET
- Adjustable UVLO Voltage and Hysteresis
- 0.8-V 1% Internal Voltage Reference
- 100-kHz to 2.5-MHz Adjustable Switching Frequency and Synchronizes to External Clock
- Supported by WEBENCH Software Tool
- Thermally-Enhanced HSOP PowerPAD Package
Applications
- Industrial Automation and Motor Control
- Vehicle Accessories: GPS, Entertainment
- 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 TPS54540B-Q1?
The input voltage range is from 4.5 V to 42 V.
- What is the maximum output current of the TPS54540B-Q1?
The maximum output current is up to 5 A.
- What is the resistance of the high-side MOSFET in the TPS54540B-Q1?
The high-side MOSFET has a resistance of 92 mΩ.
- What is the operating quiescent current of the TPS54540B-Q1?
The operating quiescent current is 146 μA.
- What is the shutdown current of the TPS54540B-Q1?
The shutdown current is 2 μA.
- What is the switching frequency range of the TPS54540B-Q1?
The switching frequency range is from 100 kHz to 2.5 MHz.
- Is the TPS54540B-Q1 qualified for automotive applications?
Yes, it is qualified for automotive applications and is AEC-Q100 compliant.
- What is the default UVLO voltage of the TPS54540B-Q1?
The default UVLO voltage is 4.3 V, but it can be adjusted using an external resistor divider.
- What is the internal voltage reference of the TPS54540B-Q1?
The internal voltage reference is 0.8 V ± 1%.
- What software tool supports the TPS54540B-Q1?
The TPS54540B-Q1 is supported by the WEBENCH Software Tool.
