TLV1117CDCY Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The TLV1117CDCY is a positive adjustable linear voltage regulator IC manufactured by Texas Instruments, rated for 800mA output current in a SOT-223-4 surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited remaining inventory (2128 pcs). The TLV1117CDCY serves as a positive adjustable output regulator suitable for applications requiring 1.25V to 13.7V output voltage with input voltages up to 15V. Due to its Last Time Buy status, identifying equivalent and substitute parts is essential for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLV1117CDCY
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
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
Current - Output	800mA
Voltage Dropout (Max)	1.3V @ 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
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-4
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitute parts for the TLV1117CDCY are classified based on strict electrical and mechanical parameter compatibility. The critical parameters determining substitution eligibility are:

Electrical Compatibility Criteria:

Output Configuration: Positive (required)
Output Type: Adjustable (required)
Number of Regulators: 1 (required)
Voltage - Input (Max): 15V (required)
Voltage - Output (Min/Fixed): 1.25V (required)
Current - Output: 800mA (required)
Package / Case: TO-261-4, TO-261AA (required)
Mounting Type: Surface Mount (required)

Substitution Categories:

Category 1: MFR Recommended Direct Substitutes (Active Status) Parts with identical or superior electrical specifications and Active product status, enabling direct replacement without design modification:

TLV1117CDCYR (Texas Instruments)
LM1117IMP-ADJ/NOPB (Texas Instruments)
LM1117IMPX-ADJ/NOPB (Texas Instruments)
LM1117MP-ADJ/NOPB (Texas Instruments)
LM1117MPX-ADJ/NOPB (Texas Instruments)
LD1117SC-R (STMicroelectronics)
LD1117STR (STMicroelectronics)
LT1117CST#PBF (Analog Devices Inc.)
LT1117CST#TRPBF (Analog Devices Inc.)

Category 2: Parametric Equivalent (Last Time Buy Status) Parts with identical electrical specifications but Last Time Buy status, suitable for applications where supply continuity is not critical:

TLV1117CDCYG3 (Texas Instruments)

All substitute parts maintain the required 800mA output current, adjustable output voltage range (1.25V to 13.7V or higher), 15V maximum input voltage, and SOT-223 package compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Output (Max)	Voltage Dropout (Max)	Current - Quiescent (Iq)	Operating Temperature	Supplier Device Package	MSL
TLV1117CDCY	Texas Instruments	Last Time Buy	13.7V	1.3V @ 800mA	10 mA	0°C ~ 125°C	SOT-223-4	2 (1 Year)
TLV1117CDCYR	Texas Instruments	Active	13.7V	1.3V @ 800mA	10 mA	0°C ~ 125°C	SOT-223-4	2 (1 Year)
TLV1117CDCYG3	Texas Instruments	Last Time Buy	13.7V	1.3V @ 800mA	10 mA	0°C ~ 125°C	SOT-223-4	2 (1 Year)
LM1117IMP-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	-40°C ~ 125°C	SOT-223-4	1 (Unlimited)
LM1117IMPX-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	-40°C ~ 125°C	SOT-223-4	1 (Unlimited)
LM1117MP-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	0°C ~ 125°C	SOT-223	1 (Unlimited)
LM1117MPX-ADJ/NOPB	Texas Instruments	Active	13.8V	1.2V @ 800mA	5 mA	0°C ~ 125°C	SOT-223	1 (Unlimited)
LD1117SC-R	STMicroelectronics	Active	15V	1.3V @ 800mA	5 mA	-40°C ~ 125°C	SOT-223	1 (Unlimited)
LD1117STR	STMicroelectronics	Active	15V	1.2V @ 800mA	5 mA	0°C ~ 125°C	SOT-223	1 (Unlimited)
LT1117CST#PBF	Analog Devices Inc.	Active	13.8V	1.2V @ 800mA	Not Specified	0°C ~ 125°C	SOT-223-3	1 (Unlimited)
LT1117CST#TRPBF	Analog Devices Inc.	Active	13.8V	1.2V @ 800mA	Not Specified	0°C ~ 125°C	SOT-223-3	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: TLV1117CDCYR The TLV1117CDCYR is the manufacturer-recommended direct substitute, offering identical electrical specifications to the TLV1117CDCY with Active product status. This part maintains the same output voltage range (1.25V to 13.7V), dropout voltage (1.3V @ 800mA), quiescent current (10 mA), and SOT-223-4 package. The primary distinction is packaging format (Cut Tape & Digi-Reel versus Tube) and significantly higher inventory availability (65400 pcs). This part is suitable for all applications currently using TLV1117CDCY without design modification.

Secondary Recommendation: LM1117IMPX-ADJ/NOPB or LM1117IMP-ADJ/NOPB These Texas Instruments LM1117 variants provide superior specifications including lower quiescent current (5 mA versus 10 mA), lower dropout voltage (1.2V versus 1.3V @ 800mA), extended operating temperature range (-40°C to 125°C), and improved moisture sensitivity rating (MSL 1 Unlimited versus MSL 2 1 Year). Both parts maintain 800mA output current and adjustable output voltage capability. LM1117IMPX-ADJ/NOPB offers the highest inventory availability (105200 pcs). These parts are electrically compatible and provide enhanced performance characteristics.

Alternative Recommendation: LD1117STR The STMicroelectronics LD1117STR provides Active product status with extended output voltage capability (15V maximum), lower dropout voltage (1.2V @ 800mA), and improved moisture sensitivity (MSL 1 Unlimited). This part maintains 800mA output current and SOT-223 package compatibility. Inventory availability is substantial (36563 pcs). This option is suitable for applications requiring extended output voltage range or enhanced reliability characteristics.

Compliance Considerations: All recommended substitute parts maintain ROHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification, ensuring regulatory alignment with the original TLV1117CDCY.

Frequently Asked Questions (FAQ)

Q: Can TLV1117CDCYR be used as a direct replacement for TLV1117CDCY? A: Yes. The TLV1117CDCYR is the manufacturer-recommended substitute with identical electrical specifications, output voltage range (1.25V to 13.7V), current rating (800mA), and package type (SOT-223-4). The only difference is packaging format (Cut Tape & Digi-Reel versus Tube) and product status (Active versus Last Time Buy). No design modification is required.

Q: What is the difference between TLV1117CDCY and LM1117IMPX-ADJ/NOPB? A: Both parts maintain 800mA output current and adjustable output voltage (1.25V minimum). Key differences include: LM1117IMPX-ADJ/NOPB has lower quiescent current (5 mA versus 10 mA), lower dropout voltage (1.2V versus 1.3V @ 800mA), extended operating temperature range (-40°C to 125°C versus 0°C to 125°C), and improved moisture sensitivity rating (MSL 1 Unlimited versus MSL 2 1 Year). These represent performance enhancements suitable for most applications.

Q: Are all substitute parts compatible with the SOT-223 package? A: All substitute parts use SOT-223 package variants (SOT-223-4 or SOT-223-3). The pinout and footprint are compatible with standard SOT-223 surface mount designs. Verify specific pin assignments in device datasheets for applications with critical pin configuration requirements.

Q: Which substitute part has the best long-term availability? A: LM1117MPX-ADJ/NOPB offers the highest inventory availability (650655 pcs) with Active product status, ensuring long-term supply continuity. LM1117IMPX-ADJ/NOPB (105200 pcs) and TLV1117CDCYR (65400 pcs) also provide substantial inventory reserves.

Q: Can I use LD1117STR in applications requiring output voltage above 13.7V? A: Yes. The LD1117STR supports output voltage up to 15V, compared to 13.7V for the TLV1117CDCY. This extended range makes LD1117STR suitable for applications requiring higher adjustable output voltages while maintaining 800mA current capability and SOT-223 package compatibility.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences? A: MSL rating indicates moisture sensitivity during storage and handling. TLV1117CDCY has MSL 2 (1 Year), requiring controlled storage conditions. Most substitute parts have MSL 1 (Unlimited), allowing indefinite storage without moisture control. For applications with extended storage or high-humidity environments, MSL 1 rated parts provide superior reliability.

Q: Are there differences in protection features between substitute parts? A: The TLV1117CDCY includes Over Current and Over Temperature protection. Most substitute parts (LM1117 and LD1117 series) maintain identical protection features. LT1117CST variants specify Over Temperature protection only. Verify protection feature requirements for your specific application.

Q: Can I substitute LT1117CST#TRPBF for TLV1117CDCY? A: Yes, with package consideration. LT1117CST#TRPBF maintains 800mA output current, adjustable output voltage (1.25V to 13.8V), and SOT-223-3 package compatibility. The primary difference is SOT-223-3 versus SOT-223-4 pinout. Verify PCB footprint compatibility before implementation. This part is suitable for applications where pin configuration matches your design.

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