company blog about TI TPS54620 6A Synchronous Step-Down Converter Now in Supply — Suitable for Distributed Power Systems and Communications Infrastructure

I. TPS54620 Product Overview

Shenzhen Mingjiada Electronics Co., Ltd. (hereinafter referred to as ‘Mingjiada’) has the Texas Instruments (TI) TPS54620 synchronous buck DC-DC converter in stock. The TPS54620 is a synchronous buck converter with an input range of 4.5 V to 17 V and a 6 A output, housed in a thermally enhanced 3.50 mm × 3.50 mm QFN package. It integrates both high-side and low-side MOSFETs and is specifically optimised for high-density power supply applications.

The output voltage ramp-up is controlled by the SS/TR pin, enabling operation as a standalone power supply or in tracking mode. Furthermore, power sequencing can be achieved by correctly configuring the enable and open-drain power-good pins.

Cycle-by-cycle current limiting on the high-side FET protects the device during overload conditions, whilst low-side pull-current limiting prevents runaway current, thereby enhancing the limiting effect. Furthermore, low-side sink current limiting is provided to shut down the low-side MOSFET, preventing excessive reverse current. Thermal shutdown disables the device when the die temperature exceeds the thermal shutdown threshold.

II. TPS54620 Key Technical Specifications

Input voltage (VIN): 4.5 V to 17 V

Power stage input voltage (PVIN): 1.6 V to 17 V

Output current: up to 6 A

Output voltage range: 0.8 V to 15 V

Switching frequency: 200 kHz to 1.6 MHz

Integrated high-side MOSFET: 26 mΩ

Integrated low-side MOSFET: 19 mΩ

Voltage reference accuracy: 0.8 V ±1% (over the full temperature range)

Shutdown quiescent current: as low as 2 µA

Operating junction temperature range: –40 °C to 150 °C

Package: 14-pin VQFN (3.50 mm × 3.50 mm)

III. TPS54620 Key Features and Advantages

1. High integration, significantly reducing design footprint

The TPS54620 integrates a 26 mΩ high-side and a 19 mΩ low-side MOSFET, reducing the footprint by 60% compared to multi-chip converter solutions. The complete 6 A power supply solution occupies less than 195 mm², equivalent to just a quarter of a postage stamp.

2. High-efficiency power conversion

Power conversion efficiency reaches up to 95 per cent, with Rds(on) reduced by 25 per cent compared to previous-generation SWIFT devices. High switching frequencies (up to 1.6 MHz) allow for the use of smaller inductors, further saving PCB space.

3. Flexible Power Management Features

External clock synchronisation: Can be synchronised to an external clock to eliminate beat noise in sensitive data acquisition circuits

Adjustable soft-start and power sequencing: Controls the output voltage ramp-up via the SS/TR pins, supporting standalone or tracking modes

Power Good monitoring: Provides under-voltage and over-voltage output monitoring

Adjustable input under-voltage lockout: Flexible configuration of system protection thresholds

4. Comprehensive Protection Mechanisms

High-side FET cycle-by-cycle current limiting to protect devices under overload conditions

Low-side pull-current limiting to prevent uncontrolled current flow

Low-side sink-current limiting to prevent excessive reverse current

Thermal shutdown protection, automatically disabling the device when the die temperature exceeds the threshold

5. Monotonic Start-up to Pre-biased Output

Supports monotonic start-up when a voltage is already present at the output, avoiding reverse current surges.

IV. Key Application Scenarios

The TPS54620 is widely used in the following areas:

1. High-density distributed power systems

In distributed power architectures such as telecommunications base stations, server backplanes and ATCA (Advanced Telecommunications Computing Architecture), the TPS54620 can act as an intermediate bus converter, efficiently converting 12V or 5V bus voltages into the low voltages required by individual sub-boards.

2. High-Performance Point-of-Load Voltage Regulation

The TPS54620 is particularly well-suited for powering embedded processors such as deep sub-micron DSPs, FPGAs and ASICs. Its 6A output capability meets the power requirements of mainstream FPGAs and processor cores, whilst a voltage reference accuracy of ±1% ensures stable processor operation under demanding temperature conditions.

3. Broadband, Networking and Fibre-Optic Communications Infrastructure

Ethernet switches

Fibre-optic communications equipment

Broadband access equipment

Femtocell base stations

Microwave backhaul equipment

V. Why Choose Mingjiada?

Guarantee of Genuine Products: Mingjiada deals exclusively in genuine, in-stock products; all items are sourced through official channels from the original manufacturers

In-Stock Inventory: Extensive stock of TPS54620, enabling a rapid response to customer requirements

One-Stop Order Fulfilment Service: We provide a full range of electronic components, from chips to modules, along with a one-stop order fulfilment service

Global Supply Network: We have branches in Shenzhen, Hong Kong, Japan, Russia, Taiwan and other locations

VI. Summary

Thanks to its high integration, high efficiency, wide input voltage range and comprehensive power management features, the Texas Instruments TPS54620 has become the ideal choice for applications such as high-density distributed power systems, high-performance point-load voltage regulation and communications infrastructure. Mingjiada Electronics provides customers with a reliable procurement channel for the TPS54620 through genuine products, immediate stock availability and professional services.

For further product information, to request a quotation or to order samples, please contact Shenzhen Mingjiada Electronics Co., Ltd.

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