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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1.5A TO263
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：27V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.5V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：10 mA
- PSRR：72dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C
- 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 LM1086IS-1.8/NOPB is a fixed positive low-dropout linear regulator manufactured by Texas Instruments, delivering a stable 1.8 V output at up to 1.5 A. Housed in a D2PAK-3 (TO-263-3) surface-mount package, it operates within an input voltage range of 2.6 V to 30 V. The device features a typical dropout voltage of 1.3 V at full load and maintains a quiescent current of approximately 10 mA. It provides high power supply rejection ratio (PSRR) of 72 dB and functions reliably across an extended temperature range from -40 °C to +125 °C.
Feature Summary
- Provides a fixed 1.8 V positive output with integrated thermal overload and short-circuit protection
- Delivers 1.5 A continuous output current with low dropout voltage for efficient power management
- Features high ripple rejection capability suitable for noise-sensitive analog and digital circuits
Applications
- Portable battery-powered equipment requiring efficient step-down regulation
- Post-regulation stages for switching power supplies
- Embedded systems requiring stable 1.8 V logic or analog supply rails
Procurement Notes
Verify the complete part number including the suffix /NOPB to confirm lead-free and RoHS compliance status. Ensure the ordering code matches the specific TO-263-3 package variant. Confirm that the fixed 1.8 V output specification aligns with the target circuit design requirements before procurement.
Selection Notes
Select this component when a fixed 1.8 V rail is required with high current capacity. Compare against adjustable variants if flexible voltage setting is needed. Consider the thermal performance in the D2PAK package relative to the expected ambient temperature and load current to ensure adequate heat dissipation without external heatsinks.
Part Context
This device belongs to the LM1086 family of 1.5 A low-dropout positive regulators. It shares core architectural similarities with other fixed-voltage variants such as the LM1086IS-3.3/NOPB and LM1086IS-5.0/NOPB, differing primarily in the internal feedback network that sets the output voltage. The IS suffix denotes the industrial temperature grade and surface-mount packaging.
Replacement Considerations
Direct functional substitutes include other LM1086 fixed-output variants like LM1086IS-2.5/NOPB or LM1086IS-3.3/NOPB if voltage levels differ. Cross-brand equivalents may exist but require verification of pinout compatibility and electrical parameter alignment.
