Buck Converters for 3.3V Output
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Here are three recommended 3.3 V, 1 A buck converters that accept a 5–12 V input. One is in a tiny SOT-23-6, one in a compact 3×3 mm QFN, and one in an automotive-grade SON package:
Table
| Part | Package | Vin Range | Iout | Switching Freq | Datasheet |
|---|---|---|---|---|---|
| AP3402 | TSOT-23-6 | 5–18 V | 2 A | 1 MHz | Datasheet |
| PAM2305BJE330 | QFN-16 (3×3 mm EP) | 4.5–18 V | 1 A | 1.5 MHz | Datasheet |
| TPS62162QDSGRQ1 | WSON-8 (2×2 mm EP) (automotive) | 3–17 V | 1 A | 2 MHz | Datasheet |
- AP3402 in SOT-23-6 offers a simple, discrete solution with up to 2 A headroom.
- PAM2305BJE330 in a true 3×3 mm QFN gives a very compact, fixed-output option.
- TPS62162QDSGRQ1 provides automotive-grade robustness in a 2×2 mm SON package if you need higher reliability.
Let me know if you’d like footprints, reference designs, or to add any of these directly into your schematic.
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