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| Part Number | LT1521IST-3#PBF | LT1521IST-5#PBF | LT1521CST-3#PBF | LT1521IS8-3#PBF |
|---|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Linear Technology |
| Product Status | Active | Active | Active | Obsolete |
| Output Configuration | Positive | Positive | Positive | Positive |
| Output Type | Fixed | Fixed | Fixed | Fixed |
| Number of Regulators | 1 | 1 | 1 | 1 |
| Voltage - Input (Max) | 20V | 20V | 20V | 20V |
| Voltage - Output (Min/Fixed) | 3V | 5V | 3V | 3V |
| Voltage - Output (Max) | - | - | - | - |
| Voltage Dropout (Max) | 0.75V @ 300mA | 0.75V @ 300mA | 0.75V @ 300mA | 0.75V @ 300mA |
| Current - Output | 300mA | 300mA | 300mA | 300mA |
| Current - Quiescent (Iq) | 25 µA | 25 µA | 25 µA | 25 µA |
| Current - Supply (Max) | 12 mA | 12 mA | 12 mA | 12 mA |
| PSRR | 58dB (120Hz) | 58dB (120Hz) | 58dB (120Hz) | 58dB (120Hz) |
| Control Features | Enable | Enable | Enable | Enable |
| Protection Features | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | 0°C ~ 125°C | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | TO-261-4, TO-261AA | TO-261-4, TO-261AA | TO-261-4, TO-261AA | 8-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | SOT-223-3 | SOT-223-3 | SOT-223-3 | 8-SO |
