Overview
The TPS40425RHAR from Texas Instruments is a dual-output, 2-phase, stackable PMBus synchronous buck driverless controller. This device is designed to operate in both non-smart power mode in its factory default setting and smart power mode after PMBus programming and power reboot. It supports single supply operation with an input voltage range of 4.5 V to 20 V and output voltages starting from 0.6 V. The TPS40425RHAR is highly versatile, capable of being configured as dual-output or 2-phase and is stackable up to 4 phases to support high load currents up to 120 A. It features on-chip non-volatile memory (NVM) for storing custom configurations and supports various advanced features such as differential remote sensing, inductor DCR current sensing, and programmable switching frequency from 200 kHz to 1.5 MHz.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 20 | V |
| Output Voltage Range | 0.6 to VIN | V |
| Switching Frequency Range | 200 kHz to 1.5 MHz | Hz |
| Maximum Load Current | Up to 120 A (with 4-phase stacking) | A |
| Reference Voltage Accuracy | 0.5% from –40°C to 125°C | % |
| Package Type | 40-Pin QFN (6 mm × 6 mm) | |
| Fault Protection | OC/OV/UV/OT | |
| Communication Interface | PMBus |
Key Features
- On-chip non-volatile memory (NVM) to store custom configurations
- Differential remote sensing and inductor DCR current sensing
- Programmable switching frequency from 200 kHz to 1.5 MHz
- Supports pre-biased output and synchronization to an external clock
- OC/OV/UV/OT fault protection
- Interleaved phase shift for 2-, 3-, or 4-phases to reduce input and output ripples
- High-speed AVSBUS support
- Temperature sensing for individual channels
Applications
- Wireless infrastructure
- Networking equipment (switchers, routers)
- Server and storage systems
- High-current DC-DC conversion in various industrial and telecommunications applications
Q & A
- What is the input voltage range of the TPS40425RHAR?
The input voltage range is from 4.5 V to 20 V. - What is the minimum output voltage that can be set?
The minimum output voltage is 0.6 V. - What is the maximum load current supported by the TPS40425RHAR?
The device can support up to 120 A with 4-phase stacking. - What communication interface does the TPS40425RHAR use?
The device uses the PMBus interface. - What types of fault protection are available on the TPS40425RHAR?
The device includes OC/OV/UV/OT fault protection. - Can the TPS40425RHAR be configured for multiple phases?
Yes, it can be configured as dual-output or 2-phase and is stackable up to 4 phases. - What is the accuracy of the reference voltage?
The reference voltage has an accuracy of 0.5% from –40°C to 125°C. - Does the TPS40425RHAR support differential remote sensing?
Yes, it supports differential remote sensing. - What is the package type of the TPS40425RHAR?
The device comes in a 40-Pin QFN package (6 mm × 6 mm). - Can the switching frequency be programmed?
Yes, the switching frequency can be programmed from 200 kHz to 1.5 MHz.
