Calculation tool
TPS546A24A
2.95-V to 18-V, stackable 10-A synchronous SWIFT™ buck converter with pin-strapping and PMBus
Data sheet
TPS546A24A
- Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN (4-VIN VDD5 for switching)
- Integrated 5.5-mΩ/1.8-mΩ MOSFETs
- Average current mode control with selectable internal compensation
- 2×, 3×, 4× stackable with current sharing up to 40 A, supporting a single address per output
- Selectable 0.5-V to 5.5-V output via pin strap or 0.25-V to 5.5-V using PMBus VOUT_COMMAND
- Extensive PMBus command set with telemetry for VOUT, IOUT and internal die temperature
- Differential remote sensing with internal FB divider for < 1% VOUT error –40°C to +150°C TJ
- AVS and margining capabilities through PMBus
- MSEL pins pin programming PMBus defaults
- 12 Selectable switching frequencies from 225 kHz to 1.5 MHz (8 pin-strap options)
- Frequency sync in/sync out
- Supports prebiased output
- Supports strongly coupled inductor
- 7-mm × 5-mm × 1.5-mm, 40-pin QFN, pitch = 0.5 mm
- Create a Custom Design Using the TPS546A24A With WEBENCH Power Designer
The TPS546A24A is a highly integrated, non-isolated DC/DC converter capable of high frequency operation and 10-A current output from a 7-mm × 5-mm package. Two, three, and four TPS546A24A devices can be interconnected to provide up to 40 A on a single output. The device has an option to overdrive the internal 5-V LDO with an external 5-V supply via the VDD5 pin to improve efficiency and reduce power dissipation of the converter.
The TPS546A24A uses a proprietary fixed-frequency current-mode control with input feedforward and selectable internal compensation components for minimal size and stability over a wide range of output capacitances.
The PMBus interface with 1-MHz clock support gives a convenient, standardized digital interface for converter configuration as well as monitoring 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. Back-channel communication between stacked devices enables all TPS546A24Aconverters powering a single output rail to share a single address to simplify system software/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.
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Technical documentation
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View all 10 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS546A24A 2.95-V to 18-V, 10-A, up to 4x Stackable, PMBus Buck Cnvtr datasheet (Rev. A) | 22 Sep 2020 | |
| Application note | Point-of-Load Solutions for Network Interface Cards (NIC) | PDF | HTML | 08 Sep 2021 | |
| EVM User's guide | TPS546A24A SWIFT™ Step-Down Converter Evaluation Module User's Guide (Rev. A) | PDF | HTML | 27 Apr 2021 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 08 Apr 2021 | ||
| Certificate | TPS546A24AEVM-1PH EU Declaration of Conformity (DoC) | 30 Jul 2020 | ||
| Technical article | 3 big benefits of small cells | PDF | HTML | 26 May 2020 | |
| Application note | Minimize On-Time-Jitter and Ripple by Optimizing Compensation | 11 May 2020 | ||
| Technical article | Advantages of scalability: from Peter Parker to pin-strapping | PDF | HTML | 30 Apr 2020 | |
| Technical article | SoC power design: 3 steps to a thermally optimized power supply | PDF | HTML | 09 Mar 2020 | |
| Application note | Powering the TPS546D24A Device Family From a Single 3.3-V Input Power Supply (Rev. A) | 04 Mar 2020 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TPS546A24AEVM-1PH — 2.95-V to 18-V, 10-A synchronous buck evaluation module
The TPS546A24AEVM-1PH is an evaluation module (EVM) for the TPS546A24A 10-A buck converter. The TPS546A24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the PMBus interface.
Evaluation board
TPS546B24AEVM — 40-A, 2-phase synchronous buck evaluation module
The TPS546B24AEVM-2PH evaluation module (EVM) is a 40-A, two-phase buck converter with two TPS546B24A devices. The TPS546B24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring via the (...)
Evaluation board
TPS546B24AEVM-1PH — 2.95-V to 18-V, 20-A synchronous buck evaluation module
The TPS546B24AEVM-1PH is an evaluation module (EVM) for the TPS546B24A 20-A buck converter. The TPS546B24A device is a stackable synchronous buck with PMBus interface that can operate from a nominal 2.95-V to 18-V supply. The device allows programming and monitoring through the PMBus interface.
Evaluation board
TPS546D24SEVM-2PH — TPS546D24S evaluation module fixed frequency synchronous buck converter 2-phase with write lock
The TPS546D24SEVM-2PH evaluation module (EVM) is a 2-phase buck converter with two TPS546D24S devices providing a single 0.8 V output. The TPS546D24A device is a stackable synchronous buck converter with PMBus interface that can operate from a nominal 2.95 V to 16 V input supply. The device allows (...)
Calculation tool
SLURB01 — TPS546D24A TPS546B24A TPS546A24A Excel Calculator Tool and Checklist
Supported products & hardware
Products
AC/DC & DC/DC converters (integrated FET)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| LQFN-CLIP (RVF) | 40 | Ultra Librarian |
Ordering & quality
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