Overview
The LD1117V50, produced by STMicroelectronics, is a low dropout voltage regulator designed to provide a stable output voltage with high efficiency. This regulator is part of the LD1117 series, which offers both fixed and adjustable output voltage options. The LD1117V50 specifically provides a fixed output voltage of 5.0V and is capable of delivering up to 800mA of output current. It is available in various packages, including the TO-220AB, which is suitable for a wide range of applications requiring reliable voltage regulation.
Key Specifications
| Parameter | Test Condition | Min. | Max. | Unit | |
|---|---|---|---|---|---|
| Output Voltage (VO) | Vin = 7 V, IO = 10 mA, TJ = 25 °C | 4.95 | 5 | 5.05 | V |
| Output Voltage (VO) | IO = 0 to 800 mA, Vin = 6.5 to 15 V | 4.9 | 5.1 | 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 | |
| Temperature Stability (∆VO) | 0.5 | % | |||
| Long Term Stability (∆VO) | 1000 hrs, TJ = 125 °C | 0.3 | % | ||
| Operating Input Voltage (Vin) | IO = 100 mA | 15 V | |||
| Quiescent Current (Id) | Vin ≤ 15 V | 5 | 10 | mA | |
| Output Current (IO) | Vin = 10 V, TJ = 25 °C | 800 | 950 | 1300 | mA |
| Output Noise Voltage (eN) | B = 10 Hz to 10 kHz, TJ = 25 °C | 100 | µV | ||
| Supply Voltage Rejection (SVR) | IO = 40 mA, f = 120 Hz, TJ = 25 °C | 60 | 75 | dB | |
| Dropout Voltage (Vd) | IO = 100 mA | 1 | 1.1 | V | |
| Thermal Regulation | Ta = 25 °C, 30 ms Pulse | 0.01 | 0.1 | %/W |
Key Features
- Low Dropout Voltage: Typical dropout voltage of 1 V, ensuring high efficiency.
- High Output Current: Capable of delivering up to 800 mA of output current.
- Fixed Output Voltage: Provides a fixed output voltage of 5.0V.
- Adjustable Version Availability: Although the LD1117V50 is fixed, the LD1117 series includes adjustable versions with a reference voltage (VREF) of 1.25V.
- Internal Current and Thermal Limit: Built-in current and thermal limiting for protection.
- Tight Output Voltage Tolerance: Output voltage tolerance within ±1% at 25°C and ±2% over the full temperature range.
- High Supply Voltage Rejection: Supply voltage rejection of 75 dB (typical).
- Low Quiescent Current: Quiescent current of 5-10 mA.
- Low Output Noise Voltage: Output noise voltage of 100 µV (typical) over a bandwidth of 10 Hz to 10 kHz.
- Compact Packages: Available in TO-220AB, SOT-223, DPAK, and SO-8 packages, optimizing thermal characteristics and space efficiency.
Applications
- Power Supplies: Ideal for use in power supply units requiring stable and efficient voltage regulation.
- Embedded Systems: Suitable for embedded systems that need reliable and low-noise power supply.
- Industrial Control Systems: Used in industrial control systems where stable voltage is crucial for operation.
- Consumer Electronics: Applicable in various consumer electronics requiring efficient power management.
- 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 LD1117V50?
The LD1117V50 can deliver up to 800 mA of output current.
- What is the typical dropout voltage of the LD1117V50?
The typical dropout voltage is 1 V.
- What are the available packages for the LD1117V50?
The LD1117V50 is available in TO-220AB, SOT-223, DPAK, and SO-8 packages.
- What is the output voltage tolerance of the LD1117V50 at 25°C?
The output voltage tolerance is within ±1% at 25°C.
- Does the LD1117V50 have built-in current and thermal limiting?
Yes, it has internal current and thermal limiting for protection.
- What is the supply voltage rejection of the LD1117V50?
The supply voltage rejection is 75 dB (typical).
- What is the quiescent current of the LD1117V50?
The quiescent current is between 5-10 mA.
- What is the operating input voltage range for the LD1117V50?
The operating input voltage range is up to 15 V.
- Is the LD1117V50 suitable for high-temperature applications?
Yes, it operates over a temperature range of -40°C to 125°C.
- What is the long-term stability of the LD1117V50?
The long-term stability is 0.3% over 1000 hours at 125°C.
