TPS546E25WRXXR-Texas Instruments-Price, Stock & Datasheet

The TPS546E25W 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 TPS546E25W devices can be interconnected to provide up to 50A on a single output.

The TPS546E25W 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 TPS546E25W is a lead-free device and is RoHS compliant without exemption.

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 50A single-phase (Stacking disabled by default)
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