TPSM8D6C24 vs TPSM8S6C24: High-Current PMBus Power Modules
TPSM8D6C24
Mfr. Part #: TPSM8D6C24MOWR
Manufacturer: Texas Instruments
Package/Case: 59-pin QFM (MOW), 16 × 20 × 4.3mm
Description: 2.95V to 16V input PMBus buck power module with dual 35A outputs, single 70A two-phase operation and four-phase stacking up to 140A.
TPSM8S6C24
Mfr. Part #: TPSM8S6C24MOYR
Manufacturer: Texas Instruments
Package/Case: 45-pin QFM (MOY), 16 × 11 × 4.3mm
Description: 2.95V to 16V input, single-output 35A PMBus buck power module with four-module stacking, telemetry and extended write protection.
The TPSM8D6C24 and TPSM8S6C24 integrate power MOSFETs, inductors and basic passives into compact non-isolated synchronous buck modules. Both support PMBus configuration and telemetry, differential remote sensing, voltage margining, frequency synchronization and current sharing.
Their main difference is channel architecture. TPSM8D6C24 contains two 35A channels that can operate independently or together. TPSM8S6C24 contains one 35A channel in a smaller package and adds extended PMBus write protection.
TPSM8D6C24 vs TPSM8S6C24
| Parameter | TPSM8D6C24 | TPSM8S6C24 |
| Output configuration | Dual independent 35A or single two-phase 70A | Single 35A |
| Maximum stacked output | 140A using two modules and four phases | 140A using four modules |
| Input voltage | 4.25V to 16V with internal LDO; down to 2.95V with split rail or external bias | 4.25V to 16V with internal LDO; down to 2.95V with split rail or external bias |
| Pin-strapped output range | 0.5V to 3.6V | 0.5V to 3.6V |
| PMBus VOUT_COMMAND range | 0.25V to 3.6V | 0.25V to 3.6V |
| Switching frequency | Nine settings from 275kHz to 1.1MHz | Nine settings from 275kHz to 1.1MHz |
| PMBus telemetry | Output voltage, output current and die temperature | Output voltage, output current and die temperature |
| Extended PMBus security | No extended PASSKEY feature listed | EXTENDED_WRITE_PROTECT and PASSKEY |
| Package | 59-pin QFM (MOW) | 45-pin QFM (MOY) |
| Dimensions | 16 × 20 × 4.3mm | 16 × 11 × 4.3mm |
| Best fit | Dual rails or one compact 70A rail | Secure, modular 35A-to-140A single rails |
Typical Applications
FPGA and ASIC core power
High-current processor and accelerator rails
Data-center and networking equipment
Semiconductor test and ATE systems
Telecom infrastructure
Industrial computing and control
FAQ
What is the main difference between TPSM8D6C24 and TPSM8S6C24?
TPSM8D6C24 contains two 35A channels and can supply two independent outputs or one 70A output. TPSM8S6C24 contains one 35A channel in a smaller package and adds extended PMBus security features.
Can TPSM8D6C24 provide two different output voltages?
Yes. Its two channels can operate as independent 35A outputs and can be configured for different supported output voltages.
How can TPSM8S6C24 reach 140A?
Up to four TPSM8S6C24 modules can be stacked, phase-interleaved and current-shared to power one output rail.
Do both modules operate from a 3.3V input?
They can operate down to 2.95V when PVIN and AVIN use a split-rail arrangement or when VDD5 receives an external bias supply. With the internal LDO and PVIN tied to AVIN, the minimum input is 4.25V.
Are TPSM8D6C24 and TPSM8S6C24 pin compatible?
No. They use different package sizes, pin counts and channel architectures. A PCB redesign is required when changing between the two modules.
Which module is better for PMBus security?
TPSM8S6C24 is the preferred choice when stronger protection against PMBus writes is needed because it includes EXTENDED_WRITE_PROTECT and PASSKEY functions.
