The PTPS543021 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 PTPS543021 achieves the high power density and offers a small footprint on the PCB. PTPS543021 has adjustable output by a different FB resistor configuration.
The PTPS543021 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 | PTPS543021 4.5V to 28V, 3A, EMI Friendly, Synchronous Step-Down Converter datasheet | PDF | HTML | 31 Jul 2025 |
| EVM User's guide | TPS543021 Step-Down Converter Evaluation Module User's Guide | PDF | HTML | 04 Aug 2025 | |
| Certificate | TPS543021EVM EU Declaration of Conformity (DoC) | 17 Jul 2025 |
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The TPS543021EVM evaluation module (EVM) helps designers evaluate the operation and performance of the easy-to-use, 3A synchronous step-down converter TPS543021. The TPS543021EVM operates from 6V to 28V input, 24V nominal and provides a 5V output at 3A. The switching frequency is 400kHz. The EVM (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-5X3 (DRL) | 6 | Ultra Librarian |
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