AP1117D50L-13 Equivalent & Substitute Parts

Part Overview

The AP1117D50L-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to provide a fixed 5V output at 1A maximum current in a TO-252-3 (DPAK) surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The AP1117D50L-13 serves as a positive fixed output regulator with integrated over-current and over-temperature protection, suitable for applications requiring stable 5V power regulation from input sources up to 18V.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Maximum Output Current	1A
Maximum Input Voltage	18V
Maximum Dropout Voltage	1.4V @ 1A
Quiescent Current	10 mA
PSRR	60dB (180Hz)
Operating Temperature Range	0°C ~ 125°C
Package Type	TO-252-3 (DPAK)
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the AP1117D50L-13 is determined by the following critical parameters:

Fixed 5V output voltage requirement
TO-252-3 (DPAK) package compatibility
Positive output configuration
Over-current and over-temperature protection
Surface mount mounting type
RoHS3 compliance

Substitute parts are grouped into two categories based on output current capability:

Category 1: 1A Output Current (Direct Equivalents) Parts maintaining the full 1A output current specification: NCP1117DT50RKG, NCP1117DT50G, NCV1117DT50RKG

Category 2: 800mA Output Current (Reduced Current Substitutes) Parts with 800mA maximum output current: LD1117DT50CTR, LD1117DT50TR, LM1117DT-5.0/NOPB, LM1117DTX-5.0/NOPB, LM1117IDT-5.0/NOPB, LM1117IDTX-5.0/NOPB

Parameter Comparison

Part Number	Manufacturer	Output Current	Max Input Voltage	Dropout @ Rated Current	Quiescent Current	Operating Temperature	Product Status	Package
AP1117D50L-13	Diodes Incorporated	1A	18V	1.4V @ 1A	10 mA	0°C ~ 125°C	Obsolete	TO-252-3
NCP1117DT50RKG	onsemi	1A	20V	1.2V @ 800mA	10 mA	0°C ~ 125°C	Active	TO-252-3
NCP1117DT50G	onsemi	1A	20V	1.2V @ 800mA	10 mA	0°C ~ 125°C	Last Time Buy	TO-252-3
NCV1117DT50RKG	onsemi	1A	20V	1.2V @ 800mA	10 mA	-40°C ~ 125°C	Active	TO-252-3
LD1117DT50CTR	STMicroelectronics	800mA	15V	1.3V @ 800mA	10 mA	-40°C ~ 125°C	Active	TO-252-3
LD1117DT50TR	STMicroelectronics	800mA	15V	1.2V @ 800mA	10 mA	0°C ~ 125°C	Active	TO-252-3
LM1117DT-5.0/NOPB	Texas Instruments	800mA	15V	1.2V @ 800mA	5 mA	0°C ~ 125°C	Active	TO-252-3
LM1117DTX-5.0/NOPB	National Semiconductor	800mA	15V	1.2V @ 800mA	5 mA	0°C ~ 125°C	Active	TO-252-3
LM1117IDT-5.0/NOPB	Texas Instruments	800mA	15V	1.2V @ 800mA	5 mA	-40°C ~ 125°C	Active	TO-252-3
LM1117IDTX-5.0/NOPB	Texas Instruments	800mA	15V	1.2V @ 800mA	5 mA	-40°C ~ 125°C	Active	TO-252-3

Engineering Selection Recommendations

For Direct 1A Current Replacement: NCP1117DT50RKG is the primary active substitute, offering 1A output current with improved input voltage tolerance (20V maximum) and lower dropout voltage (1.2V @ 800mA). This part maintains full compatibility with the AP1117D50L-13 electrical specifications and is available in high volume (35,300 units in stock). NCV1117DT50RKG provides an automotive-qualified alternative with extended temperature range (-40°C ~ 125°C) and AEC-Q100 qualification for applications requiring automotive-grade components.

For 800mA Current Applications: When application load current does not exceed 800mA, LD1117DT50TR (STMicroelectronics) or LM1117IDTX-5.0/NOPB (Texas Instruments) are suitable alternatives. Both maintain the TO-252-3 package, 5V fixed output, and RoHS3 compliance. LM1117IDTX-5.0/NOPB offers extended temperature range (-40°C ~ 125°C) and lower quiescent current (5 mA versus 10 mA), beneficial for battery-powered applications.

Product Status Considerations: All recommended substitutes maintain Active product status except NCP1117DT50G (Last Time Buy). For long-term design continuity, prioritize NCP1117DT50RKG or NCV1117DT50RKG for 1A applications, and LM1117IDTX-5.0/NOPB for 800mA applications.

Frequently Asked Questions (FAQ)

Q: Can I use an 800mA substitute in place of the AP1117D50L-13 in my design? A: Only if your application's maximum load current does not exceed 800mA. The AP1117D50L-13 is rated for 1A output. Using an 800mA-rated substitute in a 1A application will cause the regulator to enter current limiting or thermal shutdown. Verify your actual load current requirement before selecting an 800mA substitute.

Q: What is the difference between NCP1117DT50RKG and NCP1117DT50G? A: Both are onsemi 1A regulators in TO-252-3 packages with identical electrical specifications. The primary difference is product status: NCP1117DT50RKG is Active with 35,300 units in stock, while NCP1117DT50G is Last Time Buy with 3,000 units available. For new designs, NCP1117DT50RKG is recommended.

Q: Why do some substitutes have lower quiescent current (5 mA vs 10 mA)? A: Lower quiescent current indicates reduced standby power consumption. Texas Instruments LM1117 variants (LM1117DT-5.0/NOPB, LM1117DTX-5.0/NOPB, LM1117IDT-5.0/NOPB, LM1117IDTX-5.0/NOPB) specify 5 mA quiescent current compared to 10 mA for the original AP1117D50L-13. This provides power efficiency benefits in applications where the regulator operates in standby or low-load conditions.

Q: Are all substitutes RoHS3 compliant? A: All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the environmental compliance of the AP1117D50L-13.

Q: What is the significance of the NCV1117DT50RKG automotive qualification? A: NCV1117DT50RKG carries AEC-Q100 automotive qualification and extended operating temperature range (-40°C ~ 125°C). This part is suitable for automotive and industrial applications requiring higher temperature tolerance and automotive-grade reliability standards. Non-automotive applications do not require this variant.

Q: Can I interchange LD1117DT50CTR and LD1117DT50TR? A: Both are STMicroelectronics 800mA regulators in TO-252-3 packages with identical electrical performance except for operating temperature range. LD1117DT50CTR operates -40°C ~ 125°C, while LD1117DT50TR operates 0°C ~ 125°C. Select based on your application's temperature requirements.

Q: What packaging options are available for these substitutes? A: All listed substitutes use the TO-252-3 (DPAK) surface mount package, maintaining mechanical and thermal compatibility with the AP1117D50L-13. Packaging variants (Cut Tape, Tube, Digi-Reel) affect supply chain logistics but do not change electrical or mechanical specifications.

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