Overview
The LD1117D50, produced by STMicroelectronics, is a low dropout voltage regulator designed to provide high efficiency and stability in various electronic applications. This regulator is capable of delivering up to 800 mA of output current and is available in both fixed and adjustable output voltage versions. The fixed versions offer output voltages of 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V, while the adjustable version allows for a reference voltage (VREF) of 1.25 V. The LD1117D50 is packaged in several formats, including SOT-223, DPAK, SO-8, and TO-220, which optimize thermal characteristics and offer space-saving benefits.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | Vin = 7 V, IO = 10 mA, TJ = 25 °C | 4.95 | 5 | 5.05 | V |
| Output Current (IO) | Vin = 10 V, TJ = 25 °C | 800 | 950 | 1300 | mA |
| Quiescent Current (Id) | Vin ≤ 15 V | 5 | 10 | mA | |
| Dropout Voltage (Vd) | IO = 100 mA | 1 | 1.1 | V | |
| Line Regulation (∆VO) | Vin = 6.5 to 15 V, IO = 0 mA | 1 | 10 | mV | |
| Load Regulation (∆VO) | Vin = 6.5 V, IO = 0 to 800 mA | 1 | 15 | mV | |
| Supply Voltage Rejection (SVR) | IO = 40 mA, f = 120 Hz, TJ = 25 °C | 60 | 75 | dB | |
| Output Noise Voltage (eN) | B = 10 Hz to 10 kHz, TJ = 25 °C | 100 | µV |
Key Features
- Low Dropout Voltage: Typical dropout voltage of 1 V, with specific values ranging from 1 to 1.2 V depending on the output current.
- High Output Current: Capable of delivering up to 800 mA of output current.
- Fixed and Adjustable Output Voltages: Available in fixed output voltages of 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V, and an adjustable version with a reference voltage (VREF) of 1.25 V.
- Internal Current and Thermal Limit: Built-in current and thermal limiting to protect the device from overcurrent and overheating conditions.
- High Supply Voltage Rejection: Typical supply voltage rejection of 75 dB, ensuring minimal noise from the input supply.
- Low Quiescent Current: Quiescent current of 5 to 10 mA, depending on the input voltage.
- Compact Packaging: Available in SOT-223, DPAK, SO-8, and TO-220 packages, optimizing thermal performance and space efficiency.
Applications
- Power Supplies: Suitable for use in linear power supplies where low dropout voltage and high current capability are required.
- Embedded Systems: Ideal for embedded systems that need stable and efficient voltage regulation.
- Industrial Control Systems: Used in industrial control systems where reliable and stable voltage regulation is critical.
- Consumer Electronics: Applicable in consumer electronics such as audio equipment, medical devices, and other applications requiring stable DC voltage.
- Automotive Systems: Can be used in automotive systems due to its robust thermal and current handling capabilities.
Q & A
- What is the maximum output current of the LD1117D50?
The LD1117D50 can deliver up to 800 mA of output current.
- What are the available fixed output voltages for the LD1117D50?
The fixed output voltages available are 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V.
- What is the reference voltage for the adjustable version of the LD1117D50?
The reference voltage (VREF) for the adjustable version is 1.25 V.
- What is the typical dropout voltage of the LD1117D50?
The typical dropout voltage is 1 V, with specific values ranging from 1 to 1.2 V depending on the output current.
- What is the quiescent current of the LD1117D50?
The quiescent current ranges from 5 to 10 mA, depending on the input voltage.
- What is the supply voltage rejection of the LD1117D50?
The supply voltage rejection is typically 75 dB.
- What are the available package types for the LD1117D50?
The LD1117D50 is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- What is the operating input voltage range for the LD1117D50?
The operating input voltage range is up to 15 V.
- Does the LD1117D50 have built-in thermal protection?
Yes, it has internal current and thermal limiting to protect the device from overcurrent and overheating conditions.
- What is the output noise voltage of the LD1117D50?
The output noise voltage is typically 100 µV over a bandwidth of 10 Hz to 10 kHz.
