STMicroelectronics LD49100PU33RY, Automotive AEC-Q100 series, linear voltage regulator, fixed 3.3V output, 1A, 0.4V dropout, 5.5V max input, 6-DFN exposed pad, -40°C to 125°C.
| Parameter | Value |
|---|---|
| Series | Automotive, AEC-Q100 |
| Output type | Fixed |
| Mounting | Surface Mount, Wettable Flank |
| Voltage - input | 5.5V |
| Voltage dropout | 0.4V @ 1A |
| Voltage - output (Min (Fixed)) | 3.3V |
| Output current | 1A |
| Current - supply | 300 µA |
| Current - quiescent | 50 µA |
| Operating temperature | -40°C ~ 125°C (TJ) |
| PSRR | 65dB ~ 62dB (1kHz ~ 10kHz) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Case | 6-VDFN Exposed Pad |
| Control features | Enable |
| Protection features | Over Current, Over Temperature |
| Number of regulators | 1 |
| Output configuration | Positive |
Built-in overcurrent and overtemperature protection handle fault conditions. Quiescent current is 50 µA typical, max supply current 300 µA.
For a BOM freeze or a new design, this part is a safe selection — no LTB risk on the horizon.
Yes, the LD49100PU33RY is part of the Automotive AEC-Q100 series, qualified for automotive-grade applications. Its operating temperature range is -40°C to 125°C (junction temperature).
Yes, it includes both overcurrent and overtemperature protection (Protection Features: Over Current, Over Temperature). These are built-in and require no external components.
The part has an Enable control feature. It can be driven by a logic signal to sequence the output on/off, or tied high (to the input voltage) for always-on operation.