Design tool
TPS546E25-DESIGN — TPS546E25 Design file
Design files for TPS546E25
Data sheet
TPS546B25
- 2.7V to 18V input voltage with external bias
- 4V to 18V input voltage without external bias
- 0.4V to 5.5V output voltage
- Supports 25A single-phase or 2 ×, 3 ×, or 4 × stacked configurations
- Rdson_HS = 2.6mΩ, Rdson_LS = 1mΩ
- 400kHz to 2MHz operating frequency (four discrete settings through pin-strap, additional settings through PMBus)
- PMBus programmable
- Revision 1.5 compliant with PASSKEY security feature
- Input voltage, output voltage, output current, temperature telemetry
- Programmable overcurrent, overvoltage, undervoltage, overtemperature protections
- Includes single command write function in stacked configuration
- Extended write protection feature
- Non-volatile memory to store configuration settings
- Two methods for programming the output voltage
- Internal resistor divider (discrete settings) with boot-up voltage selected by pin-strapping
- External resistor divider (continuous settings) with boot-up voltage selected by VBOOT
- Precision voltage reference and differential remote sense for high output accuracy
- ± 0.5% DAC accuracy from 0°C to 85°C junction
- ± 0.85% VOUT tolerance from –40°C to 125°C junction
- Selectable FCCM/DCM in single phase only
- Start-up without PMBus communication through pin-strapping
- Safe start-up into prebiased output
- 0.5ms to 16ms programmable soft-start time
- D-CAP4 control topology with fast transient response, supporting all ceramic output capacitors
- Programmable internal loop compensation
- Selectable cycle-by-cycle valley current limit
- Open-drain power-good output
The TPS546B25 device is a highly-integrated buck converter with D-CAP4 control topology for fast transient response. All programmable parameters can be configured by the PMBus interface and stored in NVM as the new default values to minimize the external component count. Pin-strap options allow for configuration as primary or secondary, stack position and stack number, DCM (single phase only) or FCCM, overcurrent limit, fault response, internal or external feedback resistor, output voltage selection or range, switching frequency, and compensation.
The PMBus interface with 1MHz clock support gives a convenient, standardized, digital interface for configuration as well as telemetry of key parameters including output voltage, output current, and internal die temperature. Response to fault conditions can be set to restart, latch off, or ignore, depending on system requirements. Two, three, and four TPS546B25 devices can be interconnected to provide up to 100A on a single output.
The TPS546B25 has an option to overdrive the internal 4.5V LDO with an external 5V supply through the VDRV and VCC pins to improve efficiency, reduce power dissipation, and enable start-up with a lower input voltage.
The TPS546B25 is a lead-free device and is RoHS compliant without exemption.
Technical documentation
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View all 1 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS546B25 4V to 18V Input, 25A, 4 × Stackable, Synchronous Buck Converter With PMBus and Telemetry datasheet | PDF | HTML | 16 Jul 2025 |
Design & development
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Evaluation board
TPS546E25EVM-1PH — TPS546E25 evaluation module single phase
The TPS546E25 evaluation module (EVM) is a single phase buck design using the TPS546E25 device. The EVM is designed for a nominal 12V bus and to produce a regulated 1.2V output at up to 50A of load current. The TPS546E25EVM-1PH is designed to demonstrate operation of the TPS546E25 in a single (...)
Evaluation board
USB-TO-GPIO2 — USB-TO-GPIO2 USB interface adapter evaluation module
This EVM serves as an interface adapter or a bridge between a host PC and one or multiple targeted devices through a standard type-A to mini-B USB cable. The communication between the USB interface adapter and the host PC is via USB, while the communication between the USB interface adapter and (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN-FCRLF (RXX) | 37 | Ultra Librarian |
Ordering & quality
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