TLV1117CDCYG3 Equivalent & Substitute Parts

Part Overview

The TLV1117CDCYG3 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 800mA output current in a SOT-223-4 package and operates across a 0°C to 125°C temperature range. The part is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and production sustainability when original inventory becomes unavailable.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLV1117CDCYG3
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-4
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	15V
Voltage - Output (Min/Fixed)	1.25V
Voltage - Output (Max)	13.7V
Voltage Dropout (Max)	1.3V @ 800mA
Current - Output	800mA
Current - Quiescent (Iq)	10 mA
PSRR	75dB (120Hz)
Protection Features	Over Current, Over Temperature
Operating Temperature	0°C ~ 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the TLV1117CDCYG3 is determined by the following critical parameters:

Mandatory Matching Criteria:

Output Configuration: Positive
Output Type: Adjustable
Number of Regulators: 1
Current - Output: 800mA
Package / Case: TO-261-4, TO-261AA (SOT-223 family)
Voltage - Input (Max): 15V
Voltage - Output (Min/Fixed): 1.25V minimum
PSRR: 75dB (120Hz)
Protection Features: Over Current and Over Temperature

Allowable Parameter Variations:

Voltage - Output (Max): 13.7V to 15V range acceptable
Voltage Dropout (Max): 1.2V to 1.3V @ 800mA acceptable
Current - Quiescent (Iq): 5 mA to 10 mA acceptable
Operating Temperature: Extended range (-40°C to 125°C) acceptable; minimum 0°C required
Moisture Sensitivity Level (MSL): 1 or 2 acceptable
Product Status: Active preferred over Last Time Buy

Substitute parts are categorized as MFR Recommended (manufacturer-endorsed alternatives with active product status) or Parametric Equivalents (parts matching all electrical specifications but with different packaging or status).

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Output (Max)	Voltage Dropout (Max)	Current - Iq	Operating Temp	MSL	Packaging
TLV1117CDCYG3	Texas Instruments	Last Time Buy	13.7V	1.3V @ 800mA	10 mA	0°C ~ 125°C	2 (1 Year)	Tube
TLV1117CDCYR	Texas Instruments	Active	13.7V	1.3V @ 800mA	10 mA	0°C ~ 125°C	2 (1 Year)	Cut Tape & Digi-Reel
TLV1117CDCY	Texas Instruments	Last Time Buy	13.7V	1.3V @ 800mA	10 mA	0°C ~ 125°C	2 (1 Year)	Tube
LM1117IMP-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	-40°C ~ 125°C	1 (Unlimited)	Cut Tape & Digi-Reel
LM1117IMPX-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	-40°C ~ 125°C	1 (Unlimited)	Cut Tape & Digi-Reel
LM1117MP-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	0°C ~ 125°C	1 (Unlimited)	Cut Tape & Digi-Reel
LM1117MPX-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	0°C ~ 125°C	1 (Unlimited)	Cut Tape & Digi-Reel
LD1117SC-R	STMicroelectronics	Active	15V	1.3V @ 800mA	5 mA	-40°C ~ 125°C	1 (Unlimited)	Cut Tape & Digi-Reel
LD1117STR	STMicroelectronics	Active	15V	1.2V @ 800mA	5 mA	0°C ~ 125°C	1 (Unlimited)	Cut Tape & Digi-Reel
LT1117CST#PBF	Analog Devices Inc.	Active	13.8V	1.2V @ 800mA	Not specified	0°C ~ 125°C	1 (Unlimited)	Tube
LT1117CST#TRPBF	Analog Devices Inc.	Active	13.8V	1.2V @ 800mA	Not specified	0°C ~ 125°C	1 (Unlimited)	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: TLV1117CDCYR

The TLV1117CDCYR is the direct manufacturer-recommended substitute. It maintains identical electrical specifications to the TLV1117CDCYG3 while offering Active product status and improved supply availability (65,400 units in stock versus 2,663 units). Both parts are Texas Instruments products with ROHS3 compliance and EAR99 classification. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect electrical performance or PCB compatibility.

Secondary Recommendations: LM1117 Series (Texas Instruments)

The LM1117IMP-ADJ/NOPB, LM1117IMPX-ADJ/NOPB, LM1117MP-ADJ/NOPB, and LM1117MPX-ADJ/NOPB variants provide superior long-term availability and improved specifications. All LM1117 parts feature lower quiescent current (5 mA versus 10 mA), reduced dropout voltage (1.2V versus 1.3V), and MSL 1 rating (Unlimited moisture sensitivity versus 1 Year). The LM1117IMPX-ADJ/NOPB and LM1117MPX-ADJ/NOPB offer the highest inventory levels (105,200 and 650,655 units respectively). Temperature range varies: IMP and IMPX variants support -40°C to 125°C; MP and MPX variants support 0°C to 125°C. Selection depends on application temperature requirements.

Alternative Manufacturer Options: STMicroelectronics LD1117 Series

The LD1117SC-R and LD1117STR from STMicroelectronics are functionally equivalent with identical 800mA output current and SOT-223 packaging. Both offer extended output voltage range (15V maximum) and Active product status. LD1117SC-R supports -40°C to 125°C operation; LD1117STR supports 0°C to 125°C. Both feature MSL 1 rating and strong inventory availability (7,044 and 36,563 units respectively).

Alternative Manufacturer Options: Analog Devices LT1117 Series

The LT1117CST#PBF and LT1117CST#TRPBF from Analog Devices provide Active product status with 13.8V maximum output and 1.2V dropout voltage. Both support 0°C to 125°C operation and MSL 1 rating. Packaging differs: CST#PBF uses Tube format; CST#TRPBF uses Tape & Reel format. Inventory availability is moderate (4,777 and 5,080 units respectively).

Parametric Equivalent: TLV1117CDCY

The TLV1117CDCY matches all electrical specifications of the TLV1117CDCYG3 but carries Last Time Buy status (2,128 units in stock). This part is suitable only for immediate design transitions and does not address long-term supply concerns.

Frequently Asked Questions (FAQ)

Q: Can I use LM1117 parts as direct replacements for TLV1117CDCYG3?

A: Yes. The LM1117 series maintains all critical electrical parameters: 800mA output current, positive adjustable output, 1.25V minimum output voltage, 15V maximum input voltage, SOT-223 package, and identical protection features. The LM1117 variants offer improved specifications (lower quiescent current, reduced dropout voltage) and superior product status (Active). PCB layout compatibility is maintained across all variants.

Q: What is the difference between TLV1117CDCYR and TLV1117CDCYG3?

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: TLV1117CDCYG3 is supplied in Tube packaging; TLV1117CDCYR is supplied in Cut Tape & Digi-Reel format. TLV1117CDCYR also carries Active product status versus Last Time Buy. Electrical performance and PCB footprint are identical.

Q: Are STMicroelectronics LD1117 parts compatible with my design?

A: Yes, if your application operates within 0°C to 125°C (LD1117STR) or -40°C to 125°C (LD1117SC-R). The LD1117 series provides identical 800mA output current, SOT-223 packaging, and protection features. Output voltage range extends to 15V (versus 13.7V for TLV1117CDCYG3), which is acceptable for adjustable regulators. Quiescent current is lower (5 mA), and moisture sensitivity is superior (MSL 1).

Q: Which substitute offers the best long-term supply availability?

A: The LM1117MPX-ADJ/NOPB provides the highest inventory level (650,655 units) with Active product status. The LM1117IMPX-ADJ/NOPB offers 105,200 units with extended temperature range (-40°C to 125°C). Both are Texas Instruments products with ROHS3 compliance and unlimited moisture sensitivity rating.

Q: Can I mix different substitute parts in production?

A: Yes, provided all parts meet your application's electrical and temperature requirements. All listed substitutes maintain 800mA output current, positive adjustable output, SOT-223 packaging, and identical protection features. Verify that quiescent current, dropout voltage, and operating temperature ranges align with your circuit design. Mixing manufacturers (Texas Instruments, STMicroelectronics, Analog Devices) is acceptable from an electrical standpoint; however, verify component sourcing and qualification procedures with your supply chain.

Q: What does MSL rating mean for my application?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be stored after manufacturing before moisture absorption affects reliability. MSL 1 (Unlimited) means no time restriction; MSL 2 (1 Year) requires use within one year of manufacturing date. For long-term inventory or storage, MSL 1 rated parts (LM1117 series, LD1117 series, LT1117 series) are preferred over MSL 2 rated parts (TLV1117 series).

Q: Does operating temperature range affect my selection?

A: Yes, if your application operates outside 0°C to 125°C. The TLV1117CDCYG3 supports 0°C to 125°C. If extended low-temperature operation (-40°C) is required, select LM1117IMP-ADJ/NOPB, LM1117IMPX-ADJ/NOPB, LD1117SC-R, or LT1117CST variants. If operation is limited to 0°C to 125°C, all listed substitutes are acceptable.

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