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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 1.5A TO263
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：29V
- Voltage - Output (Min/Fixed)：1.2V
- Voltage - Output (Max)：15V
- Voltage Dropout (Max)：1.5V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：10 mA
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：0°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Supplier Device Package：TO-263 (DDPAK-3)
- Grade：-
- Qualification：-
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Overview
The LM1086CS-ADJ is a 1.5A low dropout positive linear regulator manufactured by Texas Instruments. It operates with an input voltage range from 2.6V to 30V and provides an adjustable output voltage between 1.25V and 27.5V. The device features a typical dropout voltage of 1.3V at full load current. It supports operation over an extended temperature range of 0°C to 125°C. The component utilizes a TO-263 (D2PAK) surface-mount package with three pins.
Feature Summary
- Provides stable regulation for high-current applications requiring up to 1.5A output capability.
- Features low dropout voltage characteristics to maintain regulation under minimal input-output differentials.
- Includes internal thermal overload and short-circuit protection mechanisms for enhanced reliability.
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulators for switching power supplies
- Local on-card regulation for memory and logic circuits
Procurement Notes
Verify the specific suffix codes against the manufacturer datasheet to confirm pinout compatibility and electrical tolerances. Ensure the TO-263 package variant matches the target PCB footprint requirements. Confirm that the adjustable output configuration aligns with the external resistor network design specifications before finalizing procurement orders.
Selection Notes
Select this component when a fixed-output LDO is insufficient for custom voltage requirements. The adjustable version allows flexibility in setting output levels via external resistors. Consider the thermal performance in the TO-263 package relative to the expected ambient temperature and load current to ensure safe operating area compliance.
Part Context
This part belongs to the LM1086 family of 1.5A low dropout regulators. It serves as the adjustable variant within the series, complementing fixed-output versions such as the LM1086CS-3.3 or LM1086CS-5.0. The family is designed for general-purpose power management tasks where efficiency and compact size are prioritized alongside moderate current delivery capabilities.
Replacement Considerations
Direct substitutes include other 1.5A adjustable LDOs from manufacturers like Linear Technology, such as the RH1086M, provided pinouts and thermal characteristics are compatible. Verify that alternative parts meet the same input voltage and current specifications.
FAQ
What is the minimum input voltage required for the LM1086CS-ADJ?
The minimum input voltage is 2.6V, which must be maintained above the desired output voltage plus the dropout voltage.
How is the output voltage adjusted in this component?
The output voltage is set externally using a resistor divider network connected to the adjustment pin, allowing for a range between 1.25V and 27.5V.
