company blog about Mingjiada Electronics Supply TI TPS546D24 Stackable 40A Synchronous SWIFT™ Step-Down Converter With Pin-Strapping And PMBus

Against the backdrop of ever-increasing demand for high-current, compact and digitally controlled power management solutions in high-computing-power equipment such as data centres, AI servers and 5G wireless infrastructure, Shenzhen Mingjiada Electronics Co., Ltd. — a supplier of genuine, in-stock Texas Instruments (TI) TPS546D24 series stackable 40A synchronous SWIFT™ buck converters — provides engineers with highly integrated, scalable point-of-load (POL) power solutions.

I. TPS546D24 Product Overview

The TPS546D24 is a synchronous buck converter with an integrated MOSFET launched by TI, forming part of the SWIFT™ power management product family. This single-chip device delivers a continuous output current of 40A and supports multi-phase stacking, scalable up to four devices to achieve a maximum output capacity of 160A, making it suitable for powering high-current loads such as FPGAs, ASICs, DSPs, processors and network chips.

The TPS546D24 supports PMBus/I²C interfaces and features digital programming and telemetry capabilities, enabling real-time monitoring of key parameters such as input voltage, output voltage, output current, temperature and power. This facilitates adaptive voltage scaling, voltage margin adjustment, soft start, timing control and fault protection within the system.

II. Key Specifications of the TPS546D24

Model: TPS546D24ARVFR

Type: Synchronous SWIFT™ buck converter

Input voltage: 2.95 V to 16 V

Output voltage: 0.5 V to 5.5 V

Single-chip output current: 40 A

Stackability: Up to 4 phases, maximum 160 A

Switching frequency: 225 kHz to 1.5 MHz

Communication interface: PMBus/I²C 1.3

Package: VQFN-40, 5 mm × 7 mm

Operating temperature: –40 °C to +125 °C

Typical applications: Data centres, servers, telecommunications base stations, industrial control, FPGA/ASIC power supplies

III. Key Features and Advantages of the TPS546D24

Supports dual power supplies: 2.95 V to 16 V PVIN; 2.95 V to 18 V AVIN (4 VIN VDD5 switching voltage)

Integrated 4.5 mΩ/0.9 mΩ MOSFETs

Average current-mode control with optional internal compensation

2×, 3×, 4× stackable, with current sharing up to 160A; each output supports a single address

Optional output voltage range of 0.5V to 5.5V via pin-bridging; voltage range of 0.25V to 5.5V when using 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; TJ range: –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

7 mm × 5 mm × 1.5 mm, 40-pin QFN, pitch = 0.5 mm

IV. Typical Applications for the TPS546D24

Data centre servers and storage devices

Switches, routers and optical transmission equipment

Communications base stations and wireless infrastructure

Power supply for FPGA, ASIC, DSP and SoC cores

Industrial automation and test and measurement instruments

High-current-density point-of-load power modules