Overview
The LD1117V50C, produced by STMicroelectronics, is a low dropout voltage regulator designed to provide a stable output voltage with high efficiency. This regulator is capable of delivering up to 800 mA of output current and is available in both fixed and adjustable versions. The LD1117V50C is specifically configured to provide a fixed output voltage of 5.0 V. It is housed in a TO-220AB package, which is suitable for through-hole mounting and offers good thermal characteristics.
Key Specifications
| Parameter | Test Condition | Min. | Max. | Unit | |
|---|---|---|---|---|---|
| Output Voltage (VO) | Vin = 7 V, IO = 10 mA, TJ = 25 °C | 4.95 | 5.0 | 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) | TJ = -40 to 125 °C | 0.5 | % | ||
| Long Term Stability (∆VO) | 1000 hrs, TJ = 125 °C | 0.3 | % | ||
| Operating Input Voltage (Vin) | IO = 100 mA | 6.5 | 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 |
Key Features
- Low Dropout Voltage: The LD1117V50C has a typical dropout voltage of 1 V, ensuring efficient operation even at low input voltages.
- High Output Current: Capable of delivering up to 800 mA of output current.
- Fixed Output Voltage: Specifically configured to provide a fixed output voltage of 5.0 V.
- Adjustable Version Availability: Although the LD1117V50C is fixed, the LD1117 series also offers adjustable versions 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.
- High Accuracy: Output voltage tolerance within ±1% at 25 °C and ±2% over the full temperature range.
- Supply Voltage Rejection: High supply voltage rejection ratio of 75 dB (typical).
- Thermal Efficiency: Optimized thermal characteristics with surface mount packages like SOT-223 and DPAK.
- Low Quiescent Current: Quiescent current of 5-10 mA, depending on the input voltage.
Applications
- Power Supply Systems: Ideal for use in power supply systems requiring a stable and efficient voltage regulation.
- Embedded Systems: Suitable for embedded systems, microcontrollers, and other electronic devices that require a reliable power source.
- Automotive Electronics: Can be used in automotive applications due to its robust thermal and current handling capabilities.
- Industrial Control Systems: Applicable in industrial control systems where stable voltage regulation is crucial.
- Consumer Electronics: Used in various consumer electronics such as audio equipment, medical devices, and more.
Q & A
- What is the maximum output current of the LD1117V50C?
The LD1117V50C can deliver up to 800 mA of output current.
- What is the typical dropout voltage of the LD1117V50C?
The typical dropout voltage is 1 V.
- What are the available output voltages for the fixed versions of the LD1117 series?
The fixed versions are available with output voltages of 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 LD1117?
The reference voltage (VREF) for the adjustable version is 1.25 V.
- What is the operating input voltage range for the LD1117V50C?
The operating input voltage range is up to 15 V.
- What is the quiescent current of the LD1117V50C?
The quiescent current is between 5 mA and 10 mA, depending on the input voltage.
- What is the supply voltage rejection ratio of the LD1117V50C?
The supply voltage rejection ratio is typically 75 dB.
- What are the package options available for the LD1117 series?
The LD1117 series is available in SOT-223, DPAK, SO-8, and TO-220 packages.
- Is the LD1117V50C RoHS compliant?
Yes, the LD1117V50C is RoHS compliant.
- What is the long-term stability of the output voltage?
The long-term stability over 1000 hours at 125 °C is within 0.3%.
