LDO Voltage Regulator, Fixed 1.2V, 800mA, SOT-223-3, STMicroelectronics
STMicroelectronics LDO voltage regulator, fixed 1.2V, 800mA, SOT-223-3. Low dropout, high efficiency, robust protection.
The STMicroelectronics LD1117S12TR is a low-dropout voltage regulator with a fixed 1.2V output voltage, capable of delivering up to 800mA of output current. It is also available as an adjustable version with a reference voltage of 1.25V, offering design flexibility for a wide range of applications.
This regulator utilises an NPN pass transistor to ensure high efficiency, as quiescent current flows predominantly into the load, unlike PNP-based designs. A standard 10µF capacitor is sufficient for stability. On-chip trimming enables an output voltage tolerance of ±1% at 25°C, ensuring precise and reliable operation.
Key Features
- Low dropout voltage: 1.1V typical
- Input voltage range: 1.4V to 15V
- Output current: 800mA maximum
- Supply voltage rejection: 75dB typical
- Internal current and thermal limiting for protection
- Suitable for SCSI-2 active termination
- Surface mount package: SOT-223-3 (3 pins)
- Operating temperature range: 0°C to 125°C
- MSL 1 - unlimited floor life
The LD1117S12TR is a reliable solution for power management applications, offering stable output, robust protection, and compact SOT-223 packaging. Its tight voltage tolerance and low dropout make it suitable for precision electronics, including SCSI-2 termination and general-purpose power regulation.
- Power management systems
- SCSI-2 active termination
- General low-voltage regulation
- Consumer electronics
- Output Type: Fixed
- Output Voltage: 1.2V
- Maximum Output Current: 800mA
- Input Voltage Range: 1.4V to 15V
- Dropout Voltage (Typical): 1.1V
- Number of Outputs: 1
- Polarity: Positive Output
- Regulator Type: Low Dropout (LDO)
- IC Mounting: Surface Mount
- IC Case / Package: SOT-223-3
- Number of Pins: 3
- Supply Voltage Rejection: 75dB (typical)
- Operating Temperature Range: 0°C to 125°C
- MSL: MSL 1 - Unlimited
- Weight: 0.2 grams
- Max Output Current: 800mA
- Output Current Max: 800mA
- of Pins: 3Pins
- Operating Temperature Min: 0°C
- Operating Temperature Max: 125°C
- Product Range: 1.2V 800mA LDO Voltage Regulators
- SVHC: No SVHC (25-Jun-2025)
Documents
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