Overview
The LD1117D25 is a low dropout voltage regulator produced by STMicroelectronics. It is capable of providing up to 800 mA of output current and is available in both fixed and adjustable versions. The LD1117D25 specifically offers a fixed output voltage of 2.5 V. This regulator is known for its high efficiency, low dropout voltage, and tight output voltage tolerance, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | Vin = 4.5 V, IO = 10 mA, TJ = 25 °C | 2.475 | 2.5 | 2.525 | V |
| Output Voltage (VO) | IO = 0 to 800 mA, Vin = 3.9 to 10 V | 2.45 | 2.55 | V | |
| Line Regulation (∆VO) | Vin = 3.9 to 10 V, IO = 0 mA | 1 | 6 | mV | |
| Load Regulation (∆VO) | Vin = 3.9 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 | |
| Dropout Voltage (Vd) | IO = 500 mA | 1.05 | 1.15 | V | |
| Dropout Voltage (Vd) | IO = 800 mA | 1.10 | 1.2 | V |
Key Features
- Low dropout voltage (1 V typical)
- Output current up to 800 mA
- Fixed output voltage of 2.5 V (for LD1117D25), with other fixed versions available (1.2 V, 1.8 V, 3.3 V, 5.0 V) and adjustable version (VREF = 1.25 V)
- Internal current and thermal limit
- High supply voltage rejection (75 dB typical)
- Tight output voltage tolerance (± 1 % at 25 °C and ± 2 % in full temperature range)
- Available in SOT-223, DPAK, SO-8, and TO-220 packages
- High efficiency due to NPN pass transistor
- Minimum 10 µF capacitor required for stability
Applications
The LD1117D25 is suitable for various applications requiring a stable and efficient voltage supply. These include:
- Power supplies for electronic devices
- Active termination for SCSI-2 interfaces
- Embedded systems and microcontrollers
- Industrial control systems
- Automotive electronics
- Consumer electronics such as audio and video equipment
Q & A
- What is the maximum output current of the LD1117D25?
The LD1117D25 can provide up to 800 mA of output current. - What is the typical dropout voltage of the LD1117D25?
The typical dropout voltage is 1 V. - 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 operating input voltage range for the LD1117D25?
The operating input voltage range is up to 15 V. - What is the quiescent current of the LD1117D25?
The quiescent current is typically 10 mA. - What is the supply voltage rejection (SVR) of the LD1117D25?
The SVR is typically 75 dB. - What packages are available for the LD1117 series?
The LD1117 series is available in SOT-223, DPAK, SO-8, and TO-220 packages. - What is the minimum capacitor required for stability?
A minimum 10 µF capacitor is required for stability. - Is the LD1117D25 RoHS compliant?
Yes, the LD1117D25 is RoHS compliant. - What is the temperature range for the LD1117D25?
The operating temperature range is from 0 °C to 125 °C.
