LM1117T-2.85/NOPB Equivalent & Substitute Parts

Part Overview

The LM1117T-2.85/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed output regulation at 2.85V with 800mA output capability in a TO-220-3 package. This device is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity. The regulator provides integrated over-current and over-temperature protection suitable for general-purpose power management applications.

Substiute Parts

LM1117T-2.85/NOPB

Texas InstrumentsIn Stock: 935LM1117T-2.85/NOPB Datasheet

Current PartRFQ

LM1117T-ADJ/NOPB

Texas InstrumentsIn Stock: 3143LM1117T-ADJ/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM1117T-2.85/NOPB is determined by the following critical parameters:

• Package Compatibility: TO-220-3 through-hole mounting
• Output Current Capability: 800mA minimum
• Input Voltage Range: 15V maximum
• Voltage Dropout: 1.2V @ 800mA maximum
• Protection Features: Over-current and over-temperature protection required
• Thermal Operating Range: 0°C ~ 125°C
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The LM1117T-ADJ/NOPB qualifies as a manufacturer-recommended substitute based on identical electrical performance characteristics, matching package specification, and equivalent protection features. While the substitute offers adjustable output voltage capability (1.25V to 13.8V) compared to the fixed 2.85V output of the main part, it maintains all critical electrical parameters and can be configured to deliver the required 2.85V output through external resistor networks.

Parameter Comparison

Engineering Selection Recommendations

The LM1117T-ADJ/NOPB is the manufacturer-recommended substitute for the obsolete LM1117T-2.85/NOPB. Both devices maintain identical electrical performance specifications, thermal characteristics, and protection features. The substitute part carries active product status, ensuring long-term availability and supply chain continuity.

Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution. The adjustable output variant provides design flexibility while maintaining backward compatibility with existing thermal and electrical requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM1117T-ADJ/NOPB directly replace the LM1117T-2.85/NOPB without circuit modifications?

A: The LM1117T-ADJ/NOPB requires external resistor networks to set the output voltage to 2.85V. Direct pin-for-pin substitution without configuration will result in different output voltage. Circuit design modifications are necessary to establish the required 2.85V output level.

Q: Are the thermal and electrical performance characteristics identical between these parts?

A: Yes. Both devices share identical maximum input voltage (15V), output current capability (800mA), voltage dropout specification (1.2V @ 800mA), quiescent current (5 mA), and PSRR performance (75dB at 120Hz).

Q: What is the significance of the product status difference?

A: The main part (LM1117T-2.85/NOPB) is obsolete, indicating discontinued manufacturing and limited future availability. The substitute (LM1117T-ADJ/NOPB) maintains active status, ensuring reliable supply and ongoing manufacturer support.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both devices operate across the identical temperature range of 0°C to 125°C and maintain equivalent protection against over-current and over-temperature conditions.

Q: Do packaging and mounting specifications differ between these parts?

A: No. Both parts use TO-220-3 through-hole packaging with identical mechanical and electrical interface specifications.