The TPS543021 is a 4.5V to 28V input voltage range, 3A synchronous buck converter. The device includes two integrated switching FETs, internal loop compensation and 5ms internal soft start to reduce component count.
By integrating the MOSFETs, the TPS543021 achieves the high power density and offers a small footprint on the PCB. TPS543021 has adjustable output by a different FB resistor configuration.
The TPS543021 operates in PFM (pulse frequency modulation) mode for high light load efficiency and reduces the power loss. The device incorporates spread spectrum for Electromagnetic Interference (EMI) reduction.
Cycle-by-cycle current limit in 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 preset time.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS543021 4.5V to 28V, 3A, EMI Friendly, Synchronous Step-Down Converter datasheet (Rev. A) | PDF | HTML | 16 Sep 2025 |
| Certificate | TPS543021EVM EU Declaration of Conformity (DoC) | 17 Jul 2025 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-5X3 (DRL) | 6 | Ultra Librarian |
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