LM1117LD-2.5 Equivalent & Substitute Parts

Part Overview

The LM1117LD-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.5V output applications with 800mA current capacity in an 8-WSON (4x4) surface mount package. This part is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing production and design continuity. Substitute parts must maintain electrical compatibility across output voltage, current capacity, dropout voltage, and thermal characteristics while meeting modern compliance requirements.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	800mA
Input Voltage (Max)	15V
Dropout Voltage (Max)	1.2V @ 800mA
Quiescent Current	5 mA
PSRR	75dB (120Hz)
Operating Temperature Range	0°C ~ 125°C
Package	8-WSON (4x4)
Protection Features	Over Current, Over Temperature

Substitute Part Grouping Explanation

Substitute parts for the LM1117LD-2.5 are qualified based on the following electrical and mechanical parameters:

Fixed output voltage of 2.5V
Output current capacity of 800mA minimum
Maximum input voltage of 15V or greater
Dropout voltage not exceeding 1.3V at 800mA
Surface mount package compatibility (8-WSON or 8-SON)
Over current and over temperature protection
PSRR of 75dB or greater at 120Hz

Two substitute parts meet these criteria: LM1117LD-2.5/NOPB (direct equivalent from Texas Instruments) and TLV1117-25IDRJR (manufacturer-recommended alternative from Texas Instruments).

Parameter Comparison

Parameter	LM1117LD-2.5	LM1117LD-2.5/NOPB	TLV1117-25IDRJR
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	2.5V	2.5V	2.5V
Output Current	800mA	800mA	800mA
Input Voltage (Max)	15V	15V	15V
Dropout Voltage (Max)	1.2V @ 800mA	1.2V @ 800mA	1.3V @ 800mA
Quiescent Current	5 mA	5 mA	Not specified
PSRR	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)
Operating Temperature	0°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C
Package	8-WSON (4x4)	8-WSON (4x4)	8-SON (4x4)
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)	2 (1 Year)

Engineering Selection Recommendations

LM1117LD-2.5/NOPB is the direct functional equivalent and primary substitute. It maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance. This part is recommended for designs requiring direct pin-for-pin replacement with minimal qualification effort.

TLV1117-25IDRJR is the manufacturer-recommended alternative from Texas Instruments. It provides extended operating temperature range (-40°C to 125°C versus 0°C to 125°C), improved dropout voltage specification (1.3V maximum), and active product status with ROHS3 compliance. The package designation differs slightly (8-SON versus 8-WSON), though both are 4x4 surface mount configurations with identical pinout and thermal characteristics. This part is suitable for applications requiring wider temperature operation or where the extended temperature range provides design margin.

Both substitutes are REACH unaffected and carry identical ECCN and HTSUS classifications as the original part.

Frequently Asked Questions (FAQ)

Q: Can LM1117LD-2.5/NOPB be used as a direct replacement for LM1117LD-2.5?

A: Yes. LM1117LD-2.5/NOPB is electrically and mechanically identical to LM1117LD-2.5, with the primary difference being product status (active versus obsolete) and compliance certifications (ROHS3 compliant versus non-compliant). The packaging, pinout, and electrical performance are equivalent.

Q: What is the difference between LM1117LD-2.5/NOPB and TLV1117-25IDRJR?

A: Both parts deliver 2.5V at 800mA with identical PSRR and protection features. TLV1117-25IDRJR offers a wider operating temperature range (-40°C to 125°C) and slightly higher dropout voltage specification (1.3V maximum at 800mA). The package designation differs (8-SON versus 8-WSON), but both are 4x4 surface mount with identical pinout and thermal performance.

Q: Are there package compatibility concerns between 8-WSON and 8-SON variants?

A: Both 8-WSON and 8-SON packages are 4x4 surface mount configurations with identical pinout and thermal characteristics. They are mechanically and electrically compatible for PCB layout purposes.

Q: Which substitute should be selected for new designs?

A: For new designs, either LM1117LD-2.5/NOPB or TLV1117-25IDRJR is acceptable. Select LM1117LD-2.5/NOPB for direct compatibility with existing designs. Select TLV1117-25IDRJR if the application requires extended temperature operation below 0°C or if design margin for dropout voltage is beneficial.

Q: Are all substitute parts RoHS compliant?

A: LM1117LD-2.5/NOPB and TLV1117-25IDRJR are both ROHS3 compliant. The original LM1117LD-2.5 is RoHS non-compliant.

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