회사 블로그 Application Server Power Supply: Texas Instruments TPS53513 1.5V to 18V, 8A Synchronous SWIFT™ Buck Converter

In modern application servers and cloud computing infrastructure, power-of-load (POL) power supply designs are facing unprecedented pressures. The supply voltages for core processors such as CPUs, FPGAs and ASICs are continuously decreasing, whilst current demands continue to rise; at the same time, board space is becoming increasingly constrained. This places stringent demands on step-down converters for high efficiency, high power density and fast transient response. TI’s (Texas Instruments) TPS53513 synchronous SWIFT™ buck converter is a solution specifically designed to meet these demands. As a specialist supplier of electronic components, Mingjiada Electronics maintains a long-term stock of genuine TPS53513 chips, providing a reliable guarantee for server power supply design.

I. Product Overview

The TPS53513 is a high-performance single-channel synchronous buck DC-DC converter launched by Texas Instruments (TI), forming part of TI’s SWIFT™ power management chip series. The device utilises the adaptive on-time D-CAP3™ control mode, with an input voltage range of 1.5 V to 18 V (offset voltage 4.5 V to 25 V). It can sustain an output current of 8 A, with a maximum output voltage of 5.5 V and a reference voltage accuracy of 600 mV ±0.5 per cent. It incorporates low-on-resistance MOSFETs with on-resistances of 13.8 mΩ for the high-side and 5.9 mΩ for the low-side, significantly reducing the number of external power devices whilst delivering high conversion efficiency and fast load transient response.

The TPS53513 is housed in a 3.5 mm × 4.5 mm, 28-pin VQFN ultra-thin package and is rated for an operating temperature range of –40°C to +85°C, making it ideal for high-density power supply system designs where space is at a premium.

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II. Key Features and Technical Advantages

1. High Integration and High Efficiency

The TPS53513 integrates a 13.8 mΩ upper MOSFET and a 5.9 mΩ lower MOSFET, supporting a continuous output current of 8 A. This effectively simplifies power board design and reduces the number of external power components. The device supports all types of ceramic output capacitors (MLCCs), helping to lower BOM costs and minimise PCB footprint.

2. D-CAP3™ Control Mode

Utilising TI’s proprietary D-CAP3™ adaptive on-time control architecture, the device requires no external compensation circuitry and delivers excellent load step response. This feature is particularly critical for rapid load changes in application servers involving CPUs and FPGAs, ensuring a stable output voltage is maintained under load transients.

3. Flexible Switching Between Dual Operating Modes

The TPS53513 supports two operating modes: Eco-mode™ automatic switching mode maintains high efficiency under light load conditions, making it suitable for standby or low-load scenarios in application servers; Forced Continuous Conduction Mode (FCCM) meets stringent output ripple and voltage accuracy requirements, making it suitable for powering high-performance DSPs and FPGAs.

4. Flexible Switching Frequency Configuration

The device offers eight programmable switching frequency settings, ranging from 250 kHz to 1 MHz, allowing designers to configure the frequency flexibly according to EMI requirements and the selection of peripheral inductors and capacitors.

5. Comprehensive Protection and Monitoring Functions

The TPS53513 incorporates an output discharge circuit, pre-charge start-up capability, cycle-by-cycle overcurrent limiting and an open-drain ‘Power Good’ output, facilitating system power sequencing management and power-up status monitoring.

III. Complete Specifications for the TPS53513

Topology: Synchronous buck converter

Input voltage: 1.5 V to 18 V; VDD bias: 4.5 V to 25 V

Output current: Up to 8 A continuous

Output voltage range: 0.6 V to 5.5 V

Reference voltage: 600 mV, accuracy ±0.5%

Switching frequency: 250 kHz to 1 MHz, 8 selectable levels

Control mode: D-CAP3™ adaptive on-time control

Upper MOSFET on-resistance: 13.8 mΩ

Lower MOSFET on-resistance: 5.9 mΩ

Operating temperature range: –40 °C to +85 °C

Package: VQFN-28 (RVE), 3.5 mm × 4.5 mm

Protection functions: Cycle-by-cycle overcurrent limit, output discharge, Power Good indication, pre-bias start-up

Synchronous rectification: Yes

Number of output channels: 1

IV. Typical Application Scenarios in Application Servers

1. Power supplies for server and cloud computing point-of-load (POL) applications

In application server motherboards, the TPS53513 provides efficient POL power conversion for CPU cores, memory controllers, I/O interfaces and other components. Its wide input voltage range is compatible with 12V intermediate bus architectures, whilst its 8A output capability meets the power supply requirements of most server point-of-load (POL) applications.

2. Power Supply for FPGA and DSP Cores

The strict voltage regulation accuracy in FCCM mode makes the TPS53513 ideally suited for powering FPGA and DSP cores in application servers, meeting their stringent requirements for power supply ripple and transient response.

3. Network and Optical Communications Infrastructure

In network interface cards and optical communication modules within application servers, the TPS53513’s compact package and high-efficiency conversion capabilities provide a compact and reliable power supply solution.

4. Storage Hardware Power Systems

The TPS53513 is equally suitable for storage subsystems in application servers, such as enterprise-grade SSD controllers and storage arrays, providing a stable step-down power supply.

VI. Mingjiada Electronics TPS53513 Supply and Procurement Services

As a specialist supplier and recycler of electronic components, Shenzhen Mingjiada Electronics Co., Ltd. maintains a long-term stock of genuine TPS53513 chips, whilst also procuring and recycling TPS53513 inventory, obsolete stock and end-of-line stock from the industry.

Supply Services:

Genuine TPS53513 chips available from stock; bulk enquiries welcome

Support for BOM fulfilment; one-stop component procurement service

Stock held in dual warehouses in Shenzhen and Hong Kong; extensive stock on hand; ultra-short lead times (1–3 days)

Over 2 million stock items, covering obscure, scarce and discontinued components

Purchasing and Recycling Services:

High-price recycling of TPS53513 stock, obsolete stock and end-of-line stock

Accepts brand-new, original, unopened stock

Inventory recycling valuation service available

Whether you need to procure TPS53513 for application server power supply design, or have surplus TPS53513 components to dispose of, please contact Mingjiada Electronics for the latest quotations and stock information.

Contact details:

Mobile: +86 13410018555 (Mr Chen)

Email: sales@hkmjd.com

Address: Rooms 1239–1241, Guoli Building, Zhenzhong Road, Futian District, Shenzhen

Website: www.integrated-ic.com

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