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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 800MA TO220-3
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：13.8V
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：10 mA
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220-3
- Grade：-
- Qualification：-
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Overview
The LM1117T-ADJ is an adjustable low-dropout linear regulator manufactured by Texas Instruments. It provides a maximum output current of 800 mA with a dropout voltage of 1.2 V at full load. The output voltage is adjustable from 1.25 V to 13.8 V using two external resistors. The device operates within a junction temperature range of 0°C to 125°C and features line regulation of 0.2% and load regulation of 0.4%. It includes built-in current limiting and thermal shutdown protection.
Feature Summary
- Adjustable output voltage configuration via external resistors
- Integrated current limiting and thermal shutdown protection
- Low dropout performance for efficient power management
Applications
- Post regulator for switching DC-DC converters
- High efficiency linear regulators
- Battery chargers
- Portable instrumentation
- Active SCSI termination regulator
Procurement Notes
Verify the specific package suffix 'T' corresponds to the required tape-and-reel format, as datasheet documentation primarily lists standard tube packages like TO-220 or SOT-223. Confirm RoHS compliance status through official ordering information. Ensure the supplier source matches Texas Instruments specifications for the LM1117 series.
Selection Notes
Select this component when an adjustable positive LDO is required with up to 800 mA output capability. It is suitable for applications needing tight line and load regulation. Ensure the input voltage remains within the 15 V maximum rating and that adequate thermal management is provided for the chosen package type.
Part Context
The LM1117 series is a family of low-dropout linear regulators available in fixed and adjustable versions. The LM1117T-ADJ specifically denotes the adjustable variant. The series offers various package options including TO-220, SOT-223, and WSON to accommodate different thermal and space constraints in power supply designs.
Replacement Considerations
LM1117IDT-ADJ/NOPB
FAQ
What is the minimum output capacitance required for stability?
A minimum of 10 µF tantalum capacitor is required at the output to improve transient response and ensure stability.
How is the output voltage determined for the adjustable version?
The output voltage is set between 1.25 V and 13.8 V using two external resistors connected to the adjust terminal.
