Description:

The TPS53353 is a D-CAP™ mode, 20-A synchronous buck converter with integrated MOSFETs. It is designed for ease of use and for systems requiring a low external component count and minimal board space. This device features 5.5-mΩ and 2.2-mΩ integrated MOSFETs, a precise 1% 0.6-V reference, and an integrated boost switch. Competitive features include a wide conversion input voltage range of 1.5 V to 15 V, a very low external component count, D-CAP™ mode control for ultrafast transient response, automatic skip mode operation, an internal soft-start control, selectable frequency, and no compensation required. The conversion input voltage range is 1.5 V to 15 V, the supply voltage range is 4.5 V to 25 V, and the output voltage range is 0.6 V to 5.5 V. This device is available in a 5-mm × 6-mm, 22-pin QFN package and is rated for an operating temperature range of –40°C to 85°C. The TPS548B28 is a newer 20-A device designed for datacenter applications and is offered in a smaller lead-free package.

Features:

• New Product Introduction: TPS548B28 16-V, 20-A Synchronous Buck Converter with Remote Sense

• Conversion Input Voltage Range: 1.5 V to 15 V

• VDD Input Voltage Range: 4.5 V to 25 V

• 92% Efficiency at 20 A with 12 V to 1.5 V

• Output Voltage Range: 0.6 V to 5.5 V

• 5-V LDO Output

• Supports Single-Rail Input

• Integrated Power MOSFETs for 20-A Continuous Output Current

• Automatic Skip Eco-mode™ for High Efficiency at Light Loads

• Shutdown Current Less Than 10 µA

• D-CAP™ Mode with Fast Transient Response

• Switching Frequency Selectable from 250 kHz to 1 MHz Using an External Resistor

• Selectable Automatic Skip or Forced PWM Operation Mode

• Built-In 1% 0.6-V Reference Voltage

• Selectable Internal Voltage Servo Soft Start of 0.7 ms, 1.4 ms, 2.8 ms, and 5.6 ms

• Integrated Boost Switch

• Pre-Biased Startup Capability

• Adjustable Overcurrent Limit with Thermal Compensation

• Overvoltage, Undervoltage, UVLO, and Overtemperature Protection

• Supports All Ceramic Output Capacitors

• Open-Drain Power Good Indicator

• Integrates NexFET™ Power Block Technology

• 22-Pin QFN Package with PowerPAD™

Applications:

• Enterprise Rack Servers and Storage

• Wired Network Switches and Routers

• ASIC, SoC, FPGA, DSP Core, and I/O Voltages