Overview
The TPS54540-Q1, produced by Texas Instruments, is a high-performance 42-V, 5-A step-down DC-DC converter with an integrated high-side MOSFET. This device is specifically designed for automotive applications and is AEC-Q100 qualified, ensuring robust performance under various operating conditions. It features a wide input voltage range of 4.5 V to 42 V and can survive load-dump pulses up to 65 V per ISO 7637. The converter is optimized for high efficiency, especially at light loads, using the Pulse-Skipping Eco-mode™.
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 |
| Package Type | 8-Pin HSOP PowerPAD™ |
| Operating Temperature Range | –40°C to 125°C (ambient), –40°C to 150°C (junction) |
| ESD Classification | HBM Level H1C, CDM Level C3B |
| Internal Voltage Reference | 0.8 V ± 1% |
Key Features
- High efficiency at light loads with Pulse-Skipping Eco-mode™
- Low ripple pulse-skip mode reducing no-load supply current
- 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
- Internally controlled output voltage start-up ramp to eliminate overshoot
- Frequency foldback and thermal shutdown for overload protection
- Supported by WEBENCH® software tool
Applications
The TPS54540-Q1 is primarily designed for automotive applications, including but not limited to:
- Infotainment systems
- Advanced driver assistance systems (ADAS)
- Automotive control units
- Power supplies for various automotive modules
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 operating quiescent current of the TPS54540-Q1?
The operating quiescent current is 146 µA.
- How does the TPS54540-Q1 handle load-dump pulses?
The device survives load-dump pulses up to 65 V per ISO 7637.
- What is the switching frequency range of the TPS54540-Q1?
The switching frequency range is 100 kHz to 2.5 MHz.
- What package type is the TPS54540-Q1 available in?
The device is available in an 8-Pin HSOP PowerPAD™ package.
- What are the ESD classification levels for the TPS54540-Q1?
The device has HBM Level H1C and CDM Level C3B ESD classification.
- How does the TPS54540-Q1 protect against overloads?
The device features frequency foldback and thermal shutdown for overload protection.
- Is the TPS54540-Q1 supported by any software tools?
Yes, it is supported by the WEBENCH® software tool.
- What is the internal voltage reference of the TPS54540-Q1?
The internal voltage reference is 0.8 V ± 1%.
- Can the undervoltage lockout (UVLO) voltage be adjusted?
Yes, the UVLO voltage can be adjusted using an external resistor divider at the enable pin.
