company blog about Mingjiada Supply TI TPS546B24 Stackable 20A PMBus Synchronous SWIFT™ Buck Converter

Mingjiada Supply TI TPS546B24 Stackable 20A PMBus Synchronous SWIFT™ Buck Converter

In high-performance computing, communications equipment and industrial systems, point-of-load (POL) power supplies must deliver stable, efficient and scalable current output within limited board space. Mingjiada Electronics continues to supply the [TI] TPS546B24 stackable 20A SWIFT™ synchronous buck converter, designed for applications requiring high current density and scalable power architectures; sample procurement and volume enquiries are supported.

The TPS546B24 is a synchronous buck converter from Texas Instruments’ (TI) SWIFT™ series. A single device can provide 20A of output current and supports a stackable configuration to expand the system’s output current. This device is suitable for high-current POL power supply solutions in systems with stringent requirements for power efficiency and power density, such as telecommunications equipment, data centre boards, industrial automation and test and measurement applications.

Within a power supply architecture, the TPS546B24 can be used for a single high-current output or stacked with multiple devices to expand capacity, enabling designers to configure the solution flexibly according to load requirements. Via the VDD5 pin, the device utilises an external 5V power supply to overdrive the internal 5V LDO, thereby improving efficiency and reducing the converter’s power consumption.

Key Features of the TPS546B24
Supports dual power supplies: 2.95V to 18V PVIN; 2.95V to 18V AVIN (4VIN VDD5 switching voltage)
Integrated 5.5mΩ/1.8mΩ MOSFETs
Average current-mode control with optional internal compensation
2×, 3×, 4× stackable, with current sharing up to 80A; supports a single address per output
Optional output voltage range of 0.5V to 5.5V via pin bridging; voltage range of 0.25V to 5.5V when using the PMBus VOUT_COMMAND
Extensive PMBus command set for telemetry of VOUT, IOUT and internal die temperature
Differential telemetry via internal feedback divider, capable of detecting VOUT errors of less than 1 per cent, with TJ ranging from –40°C to +150°C
AVS and margin regulation via PMBus
MSEL pin for pin-programming of PMBus default values
12 selectable switching frequencies between 225 kHz and 1.5 MHz (8 pin-jump options)
Frequency synchronisation input/output
Supports pre-biased output
Supports hard-coupled inductors

The TPS546B24 stackable 20A synchronous buck converter is commonly used in the following applications:
Data centre switches, rack-mounted servers
Active antenna systems, remote RF and baseband units
Automated test equipment, CT, PET and MRI
ASIC, SoC, FPGA, DSP cores and I/O voltages

With the continuing growth in demand for high-current, high-density on-board power supplies in devices such as AI servers and O-RAN base stations, the TI TPS546B24—featuring a single-chip 20A output, the ability to stack up to four chips for 80A, PMBus digital telemetry and AVS voltage regulation—significantly simplifies multi-phase power supply design and reduces the number of peripheral components, making it the preferred choice for high-performance load power supply solutions.

Mingjiada Electronics supplies the [TI] TPS546B24 stackable 20A SWIFT™ synchronous buck converter, offering type confirmation, sample support and bulk procurement services to customers in the communications, data centre, industrial control and test and measurement sectors. For further product details or to enquire about sample pricing, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for more supply information.
Tags: TPS546B24ARVFR, TPS546B24ARVF, TPS546B24ARV, TPS546B24AR, TPS546B24A, TPS546B24