TPS53316RGTR

1 Features

• 96% Maximum Efficiency

• Continuous 5-A Output Current Capability

• Support all MLCC Output Capacitor

• SmoothPWM™ Auto-Skip Eco-Mode™ for LightLoad Efficiency

• Voltage Mode Control

• Single Rail Input

• Selectable Frequency

• Selectable OCP Threshold

• Selectable Soft-Start Time

• 2.9-V to 6-V Input Voltage Range

• Adjustable Output Voltage Ranging from 0.6 V up to 0.8 × VIN

• Soft-Stop Output Discharge During Disable

• Overcurrent, Overvoltage, and Overtemperature Protection

• Open-Drain Power Good Indication

• Internal Bootstrap Switch

• Supports Prebias Start-Up Functionality

• Small 3 mm × 3 mm, 16-Pin, QFN Package

• Low RDS(on), 22-mΩ With 3.3-V Input and 18-mΩ With 5-V Input

2 Applications

• Low-Voltage Applications for 5-V Step-Down Rails

• Low-Voltage Applications for 3.3-V Step-DownRails

3 Description

The TPS53316 device provides a fully integrated 3.3- V or 5-V input, synchronous buck converter with 16

total components, in 200 mm2 of PCB area. Due to low RDS(on) and TI proprietary SmoothPWM skip mode of operation, it enables 96% peak efficiency, and over 90% efficiency at load as light as 100 mA. It requires only two 22-µF ceramic output capacitors for a power-dense, 5-A solution.

TPS53316 features 750-kHz, 1.1-MHz, and 2-MHz switching frequency selections, prebias start-up, selectable internal softstart, output soft discharge, internal VBST switch, power good, EN/Input UVLO, overcurrent, overvoltage, undervoltage, andovertemperature protections and all ceramic output capacitor support. It supports input voltages from 2.9 V to 6 V, and no extra bias voltage is needed. The output voltage is adjustable from 0.6 V up to 0.8 × VIN.

TPS53316 is available in the 3 mm × 3 mm, 16-pin QFN package (Green RoHs compliant and Pb free) and is specified from –40°C to 85°C

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