Texas Instruments TPSM8S6B24S PMBus® Power Module
Texas Instruments TPSM8S6B24S PMBus® Power Module is a highly integrated, easy-to-use, non-isolated DC-DC buck power module with added manufacturer-specific PMBus commands. Adding EXTENDED_WRITE_PROTECT and PASSKEY restricts Write capability with a greater resolution than the standard Write Protect command and improves security against malicious access to the PMBus. TPSM8S6B24S is a 25A power module and can source up to 100A with four × stackability. The device can overdrive the internal 5V LDO with an external 5V supply to enable a lower input voltage range down to 2.95V and improve the converter's efficiency. The Texas Instruments TPSM8S6B24S power module uses a proprietary fixed-frequency current-mode control with input feedforward and selectable internal compensation components. This feature is provided for minimal size and stability over various output capacitances.
The PMBus interface with 1MHz clock support provides a convenient, standardized digital interface for converter configuration and monitoring key parameters, including output voltage, output current, and internal die temperature. Depending on the system requirements, the response to fault conditions can be set to latch off, restart, or ignore. Back-channel communication between stacked devices enables all TPSM8S6B24S converters, powering a single output rail to share a single address to simplify system software and firmware design. Key parameters, including output voltage, switching frequency, soft-start time, and overcurrent fault limits, can also be configured through BOM selection without PMBus communication to support program-free power-up.
Features
- Integrated extended security feature
- 4.25V to 16V with PVIN tied to AVIN with internal LDO
- 2.95V to 16V with PVIN and AVIN split rail or with external bias on VDD5
- Integrated MOSFETs, inductors, and basic passives
- Average current mode control with selectable internal compensation
- 0.5V to 5.5V output voltage range from through pin strap
- 0.25V to 5.5V PMBus VOUT_COMMAND range
- Extensive PMBus command set with telemetry for VOUT, IOUT, and die temperature
- Differential remote sensing with an internal FB divider for < 1% VOUT error
- –40°C to +125°C TJ
- AVS and margining capabilities through PMBus
- Multi-function select (MSEL) pins for pin strap programming PMBus defaults
- Nine selectable switching frequencies from 275kHz to 1.1MHz
- Frequency sync in, sync out
- Supports pre-biased output
- 16mm × 11mm × 4.3mm, 45-pin MOY package
Applications
- Data center switches, rack servers
- Active antenna system, remote radio, and baseband unit
- Automated test equipment, CT, PET, and MRI
- ASIC, SoC, FPGA, DSP core, and I/O voltage
Functional Block Diagram
