• 4.5-V to 28-V Wide Input Voltage Range

• Integrated 85-mΩ and 40-mΩ MOSFETs for 3-A, Continuous Output Current

• Low 2-μA Shutdown, 45-μA Quiescent Current

• Internal 5-mS Soft-Start

• Fixed 400-kHz Switching Frequency

• Frequency Spread Spectrum to Reduce EMI

• Advanced Eco-mode Pulse Skip

• Peak Current Mode Control

• Internal Loop Compensation

• Overcurrent Protection for Both MOSFETs with Hiccup Mode Protection

• Over Voltage Protection

• Thermal Shutdown

• SOT-23 (6) Package

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The TPS54302 is a 4.5-V to 28-V input voltage range, 3-A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation and 5-ms internal soft start to reduce component count.

By integrating the MOSFETs and employing the SOT-23 package, the TPS54302 achieves the high power density and offers a small footprint on the PCB.

Advanced Eco-mode implementation maximizes the light load efficiency and reduces the power loss.

In the TPS54302, the frequency spread spectrum operation is introduced for EMI reduction.

Cycle-by-cycle current limit in both high-side MOSFET protects the converter in an overload condition and is enhanced by a low-side MOSFET freewheeling current limit which prevents current runaway. Hiccup mode protection is triggered if the overcurrent condition has persisted for longer than the present time.