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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 800MA SOT-223
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：15V
- Voltage Dropout (Max)：1.3V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：-
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-261-4, TO-261AA
- Supplier Device Package：SOT-223
- Grade：-
- Qualification：-
Download product information
Overview
The LD1117SC-R is a low-dropout linear voltage regulator manufactured by STMicroelectronics, designed for surface-mount applications. It operates with a maximum input voltage of 15V and supports an output current up to 800mA. The device features adjustable output voltage ranging from 1.25V to 15V, utilizing a reference voltage of 1.25V. It is housed in a 4-pin SOT-223 package with dimensions of 6.5mm length, 3.5mm width, and 1.8mm height. The component has a maximum operating temperature of 150°C and a typical static current of 5mA.
Feature Summary
- Adjustable output voltage capability within the specified input range
- High efficiency ensured by NPN pass transistor architecture
- Integrated internal current limiting and thermal shutdown protection
Applications
- Portable battery-powered equipment requiring efficient power management
- General-purpose linear regulation in space-constrained designs
- Post-regulation stages for switching power supplies
Procurement Notes
Verify the specific suffix 'SC' against the official datasheet to confirm pinout compatibility and electrical characteristics, as variations exist within the LD1117 family. Ensure the source document explicitly lists LD1117SC-R as an active or supported part number, noting that some distributors may list related variants like LD1117SxxTR or LD1117Vxx. Confirm RoHS compliance status directly from the manufacturer's latest documentation before procurement.
Selection Notes
Select this component when a surface-mount LDO with adjustable output is required for currents up to 800mA. The SOT-223 package offers thermal advantages over smaller packages while maintaining a small footprint. Consider the 15V maximum input limit and the need for external feedback resistors for the adjustable version. Verify that the application environment stays within the 150°C maximum junction temperature rating.
Part Context
The LD1117 series represents a family of low-dropout regulators known for high efficiency and tight output voltage tolerance. The SC variant specifically denotes the SOT-223 surface-mount package configuration. This series is widely used in consumer electronics and industrial applications where stable voltage regulation is critical. The adjustable version provides design flexibility for various voltage requirements.
FAQ
What is the minimum capacitor requirement for stability?
A minimum 10 μF capacitor is required at the output for stability.
Does the LD1117SC-R include protection features?
Yes, it includes internal current limiting and thermal shutdown protection.
