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TPS546C20A
4.5-V to 18-V, stackable 35-A synchronous SWIFT™ buck converter with PMBus and pin-strapping
Data sheet
TPS546C20A
- PMBus™ 1.3 Compliant Converters: 35 A
- 2-Device Stackable for up to 70 A With Current Sharing
- Input Voltage Range: 4.5 V to 18 V
- Output Voltage Range: 0.35 V to 5.5 V
- Integrated 3.2-mΩ and 1.4-mΩ Stacked NexFET™ Power Stage
- 350-mV to 1650-mV Reference for Adaptive Voltage Scaling (AVS) Function and Margining through PMBus
- 0.5% Reference Accuracy at 600 mV and Above
- Lossless Low-Side MOSFET Current Sensing
- Voltage Mode Control With Input Feed-Forward
- Differential Remote Sensing
- Monotonic Start-Up into Pre-Biased Output
- Output Voltage and Output Current Reporting
- Internal Die Temperature Monitoring
- 2 PMBus Addresses (Master 36d/Slave 37d)
- Selectable Boot-up Vout and Soft Start Values via Pin-Strapping
- Programmable via the PMBus Interface:
- OCP, UVLO, Soft-Start, PG, OV, UV, OT Levels, Fault Responses
- Turnon and Turnoff Delays
- Thermal Shutdown
- Pin Strapping for Switching Frequency: 200 kHz to 1 MHz
- Frequency Synchronization to an External Clock or Output Clock to Sync Out
- Create a Custom Design Using the TPS546C20A With the WEBENCH® Power Designer
The TPS546C20A devices are PMBus 1.3 Compliant, non-isolated DC/DC converters with integrated FETs, capable of high-frequency operation and 35-A current output from a 7-mm × 5-mm package. Two TPS546C20A devices can be paralleled together to provide up to 70-A load. Current sensing is realized by sampling a small portion of the power stage current and independent on the device temperature. High-frequency, low-loss switching, provided by an integrated NexFET power stage and optimized drivers, allows for very high-density power solutions. The PMBus interface enables the AVS functions through VOUT_COMMAND, flexible converter configuration, as well as key parameters monitoring including output voltage, current, and internal die temperature. Response to fault conditions can be set to either restart, latch-off or ignore depending on system requirements.
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Technical documentation
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View all 8 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS546C20A 4.5-V to 18-V, 35-A 2× Stackable Synchronous Buck Converters With PMBus Supporting Telemetry datasheet (Rev. C) | PDF | HTML | 11 Jun 2018 |
| User guide | TPS546C20A 2-Phase SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) | PDF | HTML | 08 Feb 2022 | |
| Application note | Programming the NVM of PMBus Buck Converters to Support Mass-Production Needs (Rev. B) | 13 May 2019 | ||
| Technical article | Powering FPGAs - What to consider with Xilinx UltraScale+ FPGAs | PDF | HTML | 29 Jan 2018 | |
| Application note | Analysis and Design of Input Filter for DC-DC Circuit | 27 Nov 2017 | ||
| EVM User's guide | TPS546C20AEVM1-746 Two, Separated Single-Phase Evaluation Module | 21 Jun 2016 | ||
| Application note | Method of Graphing Safe Operating Area (SOA) Curves in DC-DC Converter | 30 Mar 2016 | ||
| Analog Design Journal | MOSFET power losses and how they affect power-supply efficiency | 26 Jan 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TPS546C20AEVM1-746 — TPS546C20A 35A PMBus Stackable Synchronous Buck Converter Evaluation Module
The TPS546C20AEVM1-PWR746 evaluation module (EVM) uses the TPS546C20A. The TPS546C20A is a voltage mode, 35A synchronous buck converter with integrated MOSFETs. Two seperated converters are included on the EVM, both providing a 0.9V output at up to 35A from a 12V input bus.
User guide: PDF
Evaluation board
TPS546C20AEVM2-746 — TPS546C20A Two-Phase Evaluation Module With PMBUS
The TPS546C20AEVM2-PWR746 evaluation module (EVM) uses two TPS546C20A devices. The TPS546C20A is a voltage mode, 35A synchronous buck converter with integrated MOSFETs. Two phase converters on the EVM provides a 0.9V output at up to 70A from a 12V input bus.
Reference designs
PMP20071 — Reference Design: 8.5V-13.2V to 1.2V 50A DC/DC Converter
The TPS546C20A provides a single IC for both control & the synchronous power stage for high current DC/DC applications and allows doubling of the current capability with use of two of the same part. Multi-phase also allows output ripple cancellation and effective higher bandwidth control (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| LQFN-CLIP (RVF) | 40 | Ultra Librarian |
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