AMS1117-3.3
UMW · Power management
VerifiedFAE reviewed
| Parameter | AMS1117-3.3 | AMS1117-3.3 | Engineering note |
|---|---|---|---|
| Output voltage limits at 25 °C | 3.251 V to 3.349 V (±1.5% row) | 3.234 V to 3.366 V (±2%) | The target has a slightly wider explicitly stated 25 °C output window. |
| Full-temperature output tolerance | The source table also lists 3.201 V to 3.399 V | No equivalent full-temperature limit was found in the target datasheet | Applications requiring a formally guaranteed full-temperature output window need bench validation against the target datasheet. |
| Dropout voltage test current | 1.3 V maximum at 0.8 A; higher current is outside the specified guarantee | 1.3 V maximum at 1 A | The target specifies the same maximum dropout at a higher load current. |
| Absolute maximum input voltage | 15 V | 18 V (recommended maximum 12 V) | The target has greater absolute input margin, but both should remain within their recommended application conditions. |
FAE documentary review accepted: the exact AMS1117-3.3 and UMW AMS1117-3.3 order codes are 1 A fixed 3.3 V LDOs in SOT-223 with pin 1 GND/ADJ, pin 2 VOUT, pin 3 VIN and VOUT on the tab. Both specify -40 to +125 C operating junction temperature and a 1.3 V maximum dropout. The target has a slightly wider 25 C output-voltage window and does not publish an equivalent full-temperature window; validate this boundary for precision rails. The original AMS manufacturer site currently returns an error, so the archived AMS document is used. Document review only; not bench, reliability or production qualified.
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