Overview
The LD1117DT33, produced by STMicroelectronics, is a low dropout voltage regulator capable of providing up to 800 mA of output current. This device is part of the LD1117 series, which includes both fixed and adjustable output voltage versions. The LD1117DT33 specifically offers a fixed output voltage of 3.3 V, making it suitable for a variety of applications requiring stable and efficient voltage regulation.
Key Specifications
| Parameter | Test Condition | Min. | Max. | Unit | |
|---|---|---|---|---|---|
| Output Voltage (VO) | Vin = 5.3 V, IO = 10 mA, TJ = 25 °C | 3.267 | 3.3 | 3.333 | V |
| Output Voltage (VO) | IO = 0 to 800 mA, Vin = 4.75 to 10 V | 3.235 | 3.365 | V | |
| Line Regulation (∆VO) | Vin = 4.75 to 15 V, IO = 0 mA | 1 | 6 | mV | |
| Load Regulation (∆VO) | Vin = 4.75 V, IO = 0 to 800 mA | 1 | 10 | 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 ≤ 10 V | 5 | 10 | mA | |
| Output Current (IO) | Vin = 7.5 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: Typically 1 V, ensuring high efficiency and minimal voltage loss.
- High Output Current: Up to 800 mA, making it suitable for various power requirements.
- Fixed Output Voltage: The LD1117DT33 provides a fixed output voltage of 3.3 V.
- Internal Current and Thermal Limit: Built-in protection against overcurrent and overheating.
- Tight Output Voltage Tolerance: ±1% at 25 °C and ±2% over the full temperature range.
- High Supply Voltage Rejection: Typically 75 dB, ensuring stable output voltage despite input voltage variations.
- Low Quiescent Current: Typically 5-10 mA, minimizing standby power consumption.
- Compact Packages: Available in SOT-223, DPAK, SO-8, and TO-220 packages, optimizing thermal performance and space efficiency.
Applications
The LD1117DT33 is versatile and can be used in a variety of applications, including:
- Power Supplies: For providing stable 3.3 V output in power supply units.
- Embedded Systems: In microcontroller and microprocessor-based systems requiring a reliable 3.3 V power source.
- Industrial Automation: For powering sensors, actuators, and other devices in industrial control systems.
- Consumer Electronics: In devices such as set-top boxes, routers, and other consumer electronic products.
- Automotive Systems: For applications requiring a stable voltage in automotive electronics.
Q & A
- What is the maximum output current of the LD1117DT33?
The LD1117DT33 can provide up to 800 mA of output current. - What is the fixed output voltage of the LD1117DT33?
The fixed output voltage of the LD1117DT33 is 3.3 V. - What is the typical dropout voltage of the LD1117DT33?
The typical dropout voltage is 1 V. - What are the available packages for the LD1117DT33?
The LD1117DT33 is available in SOT-223, DPAK, SO-8, and TO-220 packages. - What is the supply voltage rejection of the LD1117DT33?
The supply voltage rejection is typically 75 dB. - Does the LD1117DT33 have built-in protection features?
Yes, it has internal current and thermal limit protection. - What is the quiescent current of the LD1117DT33?
The quiescent current is typically 5-10 mA. - What is the operating input voltage range for the LD1117DT33?
The operating input voltage range is up to 15 V. - Is the LD1117DT33 suitable for high-temperature environments?
Yes, it operates from -40 °C to 125 °C. - What is the long-term stability of the output voltage?
The long-term stability is 0.3% over 1000 hours at 125 °C.
