TPS53321RGTR

The TPS53321 device provides a fully integrated 3-V to 5-V VIN integrated synchronous FET converter solution with 16 total components in 200 mm² of PCB area. Due to the low ON-resistance and TI's Proprietary SmoothPWM™skip mode of operation, it enables 96% peak efficiency and over 90% efficiency at loads as light as 100 mA. It requires only two 22-μF ceramic output capacitors for a power dense 5-A solution. The TPS53321 features a 1.1-MHz switching frequency, skip mode operation support, prebias start-up, internal soft start, output soft discharge, internal VBST switch, power good, EN/input UVLO, overcurrent, overvoltage, undervoltage, and overtemperature protections, and all ceramic output capacitor support. It supports supply voltage from 2.9V to 3.5V and conversion voltage from 2.9V to 6V. The output voltage is adjustable from 0.6V to 0.84 × VIN. The TPS53321 is available in the 3 mm × 3 mm 16-pin QFN package (Green RoHs compliant and Pb free) and operates between -40°C and 85°C.

Applications

• 5-V Step-Down Rails
• 3.3-V Step-Down Rails

Key features

• 96% Maximum Efficiency
• Continuous 5-A Output Current
• Supports All MLCC Output Capacitor
• SmoothPWM™Auto-Skip Eco-Mode™for Light Load Efficiency
• Optimized Efficiency at Light and Heavy Loads
• Voltage Mode Control
• Supports Master-Slave Interleaved Operation
• Synchronization up to ±20% of Nominal Frequency
• Conversion Voltage Range Between 2.9 V and 6 V
• Soft-Stop Output Discharge During Disable
• Adjustable Output Voltage Ranging Between 0.6 V and 0.84 × VIN
• Overcurrent, Overvoltage, and Overtemperature Protection
• Small 3 mm × 3 mm, 16-Pin QFN Package
• Open-Drain Power Good Indication
• Internal Boot Strap Switch
• Low RDS(on), 24 mΩ With 3.3-V Input and 19-mΩ With 5-V Input
• Supports Prebias Start-Up