L4909
IC REG LIN POS ADJ 15MULTIWATTManufacturer: STMicroelectronics
Categories: Linear, Low Drop Out (LDO) Regulators
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The STMicroelectronics L4909 is a three-output adjustable positive linear voltage regulator designed for applications requiring multiple regulated voltage rails. Each output can deliver up to 1.2A with a typical dropout voltage of 2.2V at 500mA. This component features adjustable output voltages, with a minimum fixed output of 5V and a maximum adjustable output of 12V. Integrated protection mechanisms include over-current, over-temperature, and short-circuit protection. Control functionalities such as Enable and Trigger are also incorporated. The L4909 offers a Power Supply Rejection Ratio (PSRR) of 60dB across the 120Hz to 1kHz frequency range. This device is supplied in a Multiwatt-15 (Vertical, Bent and Staggered Leads) package suitable for through-hole mounting. It finds application in power supplies, consumer electronics, and automotive systems. The quiescent current is 11 mA, with a maximum supply current of 29 mA. Operating temperature range is 0°C to 70°C.
Additional Information
Series: -RoHS Status: ROHS3 CompliantManufacturer Lead Time: No lead time information availableProduct Status: ObsoletePackaging: TubeDatasheet:Download Free CAD Model:
Technical Details:
| Packaging | Tube |
| Package / Case | Multiwatt-15 (Vertical, Bent and Staggered Leads) |
| Output Type | Adjustable |
| Mounting Type | Through Hole |
| Current - Output | 1.2A, 1.2A, 1.2A |
| Operating Temperature | 0°C ~ 70°C |
| Output Configuration | Positive |
| Current - Quiescent (Iq) | 11 mA |
| Voltage - Input (Max) | 40V |
| Number of Regulators | 3 |
| Supplier Device Package | 15-Multiwatt |
| Voltage - Output (Max) | 12V |
| Voltage - Output (Min/Fixed) | 5V |
| Control Features | Enable, Trigger |
| PSRR | 60dB (120Hz ~ 1kHz) |
| Voltage Dropout (Max) | 2.2V @ 500mA, 2.2V @ 500mA, 2.2V @ 500mA |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Current - Supply (Max) | 29 mA |
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