Texas Instruments Synchronous Buck Step-Down Converter 3.3V 0.5A

The Texas Instruments Synchronous Buck Step-Down Converter 3.3V is a high-efficiency DC-DC regulator that provides a fixed 3.3 V output at up to 500 mA. It is built on the DCS-Control topology to deliver reliable and stable power conversion for a wide range of electronic systems. With an input voltage range of 4.75 V to 28 V, it is suited to applications powered by multi-cell Li-ion batteries, as well as 12 V and higher intermediate supply rails.

Key Features

• Fixed 3.3 V output with 500 mA output current
• Input voltage range of 4.75 V to 28 V
• Automatic power save mode at light loads
• Dedicated sleep mode for applications with advanced power-saving requirements
• Power good output for power sequencing and power-on reset
• Under-voltage lockout, short-circuit protection and over-temperature protection
• 100% duty cycle mode for lowest dropout operation
• Active output discharge when in shutdown mode
• 1 MHz switching frequency
• Surface-mount WSON-10 package

Efficiency and Power Consumption

The converter offers high power efficiency across the load range. Its typical quiescent current is 22 µA in normal mode and 4.8 µA in sleep mode, where efficiency at very low loads can be increased by up to 20%. The shutdown current is less than 2 µA. The 1 MHz switching frequency allows the use of smaller external inductors and capacitors, which can simplify board design and reduce the overall solution footprint.

Package and Environmental Information

The WSON-10 package is designed for modern, space-constrained PCB layouts. This green product contains no antimony or bromine.

Dimensions and Weight

• Width: 3.3
• Depth: 1.5
• Height: 4.3
• Weight: 1.61 g

Choose this synchronous buck converter when a compact, efficient fixed 3.3 V supply is required from an input range of 4.75 V to 28 V.