Overview
The TPS54540-Q1 is a 42-V, 5-A step-down regulator produced by Texas Instruments. This device is designed with an integrated high-side N-channel MOSFET and is qualified for automotive applications, meeting the AEC-Q100 standards. It features a wide input voltage range of 4.5 V to 42 V and supports high-efficiency power supply designs. The regulator includes current mode control, which simplifies external compensation and allows for flexible component selection. It also incorporates a low-ripple pulse-skip mode to reduce no-load supply current and an adjustable switching frequency to optimize efficiency or component size.
Key Specifications
| Parameter | Description |
|---|---|
| Input Voltage Range | 4.5 V to 42 V |
| Output Current | Up to 5 A |
| Switching Frequency | 100 kHz to 2.5 MHz (adjustable) |
| High-Side MOSFET Resistance | 92 mΩ |
| Operating Quiescent Current | 146 µA |
| Shutdown Current | 2 µA |
| Output Voltage Range | 0.8 V to 41.1 V (adjustable) |
| Package Type | 8-pin HSOP PowerPAD™ |
| Operating Temperature Range | –40°C to 150°C (TJ) |
| ESD Classification | HBM: Level H1C, CDM: Level C3B |
Key Features
- High-efficiency at light loads with pulse-skipping Eco-mode™
- Integrated high-side N-channel MOSFET with 92 mΩ resistance
- Adjustable switching frequency (100 kHz to 2.5 MHz) and synchronization to external clock
- Low dropout at light loads with integrated BOOT recharge FET
- Adjustable undervoltage lockout (UVLO) voltage and hysteresis
- Internal 0.8-V 1% voltage reference
- Internal soft-start circuit to reduce in-rush current and output voltage overshoot
- Frequency foldback and thermal shutdown for overload protection
- Supported by WEBENCH® software tool
Applications
- Automotive systems
- Computer and network technology
- Automation and industrial control systems
- Precision measuring instruments and detectors
- Flaw detection and balance equipment
- Industrial robots and controllers
Q & A
- What is the input voltage range of the TPS54540-Q1?
The input voltage range is 4.5 V to 42 V.
- What is the maximum output current of the TPS54540-Q1?
The maximum output current is up to 5 A.
- What is the switching frequency range of the TPS54540-Q1?
The switching frequency is adjustable from 100 kHz to 2.5 MHz.
- What is the resistance of the integrated high-side MOSFET?
The resistance of the integrated high-side MOSFET is 92 mΩ.
- What is the operating quiescent current of the TPS54540-Q1?
The operating quiescent current is 146 µA.
- What is the shutdown current of the TPS54540-Q1?
The shutdown current is 2 µA.
- What is the package type of the TPS54540-Q1?
The package type is 8-pin HSOP PowerPAD™.
- What are the key protection features of the TPS54540-Q1?
The device includes frequency foldback, thermal shutdown, and overvoltage protection (OVP).
- Is the TPS54540-Q1 qualified for automotive applications?
Yes, it is qualified for automotive applications and meets AEC-Q100 standards.
- What software tool supports the TPS54540-Q1?
The device is supported by the WEBENCH® software tool.
