Overview
The LD1117F33C is a low dropout voltage regulator produced by STMicroelectronics. This device is capable of providing up to 800 mA of output current and is available in both fixed and adjustable output voltage versions. The LD1117F33C specifically offers a fixed output voltage of 3.3 V. It is designed to operate with high efficiency, utilizing an NPN pass transistor which ensures that the quiescent current flows mostly into the load. This regulator is supplied in various packages, including TO-220, DPAK, SOT-223, and SO-8, which optimize thermal characteristics and offer space-saving benefits.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 3.267 | 3.3 | 3.333 | V |
| Operating Input Voltage (Vin) | - | - | 15 | V |
| Output Current (IO) | 800 | 950 | 1300 | mA |
| Quiescent Current (Id) | 5 | 10 | - | mA |
| Dropout Voltage (Vd) | 1 | 1.1 | 1.2 | V |
| Line Regulation (∆VO) | 1 | 6 | - | mV |
| Load Regulation (∆VO) | 1 | 10 | - | mV |
| Temperature Stability (∆VO) | 0.5 | - | - | % |
| Supply Voltage Rejection (SVR) | 60 | 75 | - | dB |
| Output Noise Voltage (eN) | 100 | - | - | µV |
| Package | - | - | TO-220-3, DPAK, SOT-223, SO-8 | - |
Key Features
- Low dropout voltage (1 V typical)
- Output current up to 800 mA
- Fixed output voltage of 3.3 V (for LD1117F33C), with other fixed versions available (1.2 V, 1.8 V, 2.5 V, 5.0 V) and an adjustable version
- Internal current and thermal limit
- Output voltage tolerance within ±1% at 25°C and ±2% over the full temperature range
- High supply voltage rejection (75 dB typical)
- Low quiescent current (5-10 mA)
- Available in various packages: TO-220, DPAK, SOT-223, SO-8
Applications
- Power supply systems requiring low dropout voltage and high current capability
- Embedded systems and microcontrollers
- Industrial control systems
- Automotive electronics
- Consumer electronics requiring stable voltage regulation
Q & A
- What is the maximum output current of the LD1117F33C?
The LD1117F33C can provide up to 800 mA of output current.
- What are the available output voltages for the LD1117 series?
The LD1117 series offers fixed output voltages of 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V, as well as an adjustable version.
- What is the typical dropout voltage of the LD1117F33C?
The typical dropout voltage is 1 V.
- What are the package options for the LD1117F33C?
The device is available in TO-220, DPAK, SOT-223, and SO-8 packages.
- What is the quiescent current of the LD1117F33C?
The quiescent current is between 5 mA and 10 mA.
- What is the supply voltage rejection of the LD1117F33C?
The supply voltage rejection is typically 75 dB.
- What is the output voltage tolerance of the LD1117F33C at 25°C?
The output voltage tolerance is within ±1% at 25°C.
- What is the operating input voltage range for the LD1117F33C?
The operating input voltage range is up to 15 V.
- Does the LD1117F33C have internal current and thermal limits?
Yes, the device has internal current and thermal limits.
- What is the recommended capacitor value for stability?
A minimum capacitor value of 10 µF is recommended for stability.
