AP1117E50G-13 Equivalent & Substitute Parts

Part Overview

The AP1117E50G-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to provide a fixed 5V output at 1A maximum current in a SOT-223-3 surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The AP1117E50G-13 serves as a positive fixed output regulator suitable for applications requiring stable 5V power delivery with integrated over-current and over-temperature protection.

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)
Protection Features	Over Current, Over Temperature
Operating Temperature Range	0°C ~ 125°C
Package Type	SOT-223-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AP1117E50G-13 is determined by the following critical parameters:

Fixed output voltage of 5V
Surface mount SOT-223 package family (SOT-223-3 or SOT-223-4)
Positive output configuration
Single regulator output
Maximum input voltage of 15V or higher
Output current capability of 800mA or greater
Over-current and/or over-temperature protection
ROHS3 compliance
Operating temperature range encompassing 0°C to 125°C

Substitute parts are grouped into two categories: direct equivalents from alternative manufacturers (AZ1117CH-5.0TRG1, NCP1117LPST50T3G) and manufacturer-recommended alternatives with reduced output current ratings (LD1117S50CTR, LD1117S50TR, LM1117 series, LT1117CST-5 series). All listed substitutes maintain electrical compatibility within the specified parameter constraints and package footprint compatibility.

Parameter Comparison

Parameter	AP1117E50G-13	AZ1117CH-5.0TRG1	NCP1117LPST50T3G	LD1117S50CTR	LD1117S50TR	LM1117IMP-5.0/NOPB	LM1117IMPX-5.0/NOPB	LM1117MP-5.0/NOPB	LM1117MPX-5.0/NOPB	LT1117CST-5#PBF	LT1117CST-5#TRPBF
Output Voltage	5V	5V	5V	5V	5V	5V	5V	5V	5V	5V	5V
Output Current	1A	1A	1A	800mA	800mA	800mA	800mA	800mA	800mA	800mA	800mA
Max Input Voltage	18V	15V	18V	15V	15V	15V	15V	15V	15V	15V	15V
Dropout Voltage	1.4V @ 1A	1.3V @ 800mA	1.4V @ 1A	1.3V @ 800mA	1.2V @ 800mA	1.2V @ 800mA	1.2V @ 800mA	1.2V @ 800mA	1.2V @ 800mA	1.2V @ 800mA	1.2V @ 800mA
Quiescent Current	10 mA	6 mA	700 µA	10 mA	10 mA	5 mA	5 mA	5 mA	5 mA	10 mA	10 mA
PSRR	60dB (180Hz)	70dB (120Hz)	60dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)	75dB (120Hz)
Protection Features	Over Current, Over Temperature	Thermal Shutdown	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature	Over Temperature	Over Temperature
Operating Temperature	0°C ~ 125°C	-20°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Package	SOT-223-3	SOT-223-3	SOT-223	SOT-223	SOT-223	SOT-223	SOT-223-4	SOT-223	SOT-223-4	SOT-223-3	SOT-223-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

The AP1117E50G-13 is obsolete; therefore, selection of an active substitute is mandatory for new designs and production continuity.

Primary Substitutes (Full 1A Output Current):

AZ1117CH-5.0TRG1 and NCP1117LPST50T3G maintain the full 1A output current specification of the original part. Both are active products with ROHS3 compliance. AZ1117CH-5.0TRG1 offers extended operating temperature range (-20°C to 125°C) and improved quiescent current (6 mA). NCP1117LPST50T3G matches the original 18V maximum input voltage specification and provides superior quiescent current performance (700 µA).

Secondary Substitutes (800mA Output Current):

LD1117S50CTR, LD1117S50TR, LM1117 series, and LT1117CST-5 series are manufacturer-recommended alternatives with reduced output current ratings of 800mA. These parts are suitable for applications where the full 1A specification is not required. All are active products with ROHS3 compliance. The LM1117 series from Texas Instruments offers the lowest quiescent current (5 mA) and extended operating temperature range options (-40°C to 125°C). The LD1117S50TR variant provides the lowest dropout voltage (1.2V @ 800mA) among this group.

Selection should prioritize NCP1117LPST50T3G or AZ1117CH-5.0TRG1 for applications requiring full 1A output current. For applications with 800mA or lower current requirements, LM1117IMP-5.0/NOPB or LM1117MP-5.0/NOPB provide optimal performance with low quiescent current and broad temperature range support.

Frequently Asked Questions (FAQ)

Q: Can I use an 800mA rated substitute in place of the 1A rated AP1117E50G-13?

A: Only if your application draws 800mA or less at maximum load. The 800mA-rated substitutes (LD1117S50CTR, LD1117S50TR, LM1117 series, LT1117CST-5 series) will operate within specification at currents up to 800mA. Exceeding this limit will cause the regulator to enter current limiting or thermal shutdown. Verify your actual circuit current requirements before selecting an 800mA-rated part.

Q: Are all substitute parts pin-compatible with the AP1117E50G-13?

A: All listed substitutes use SOT-223 package variants (SOT-223-3 or SOT-223-4). The SOT-223-3 variants (AZ1117CH-5.0TRG1, LT1117CST-5#PBF, LT1117CST-5#TRPBF) are directly pin-compatible with the original AP1117E50G-13. SOT-223-4 variants (LM1117IMPX-5.0/NOPB, LM1117MPX-5.0/NOPB) include an additional pin but maintain functional compatibility on the three primary pins. Standard SOT-223 variants are also compatible. Verify PCB footprint design before assembly.

Q: What is the difference between the LD1117S50CTR and LD1117S50TR variants?

A: Both are STMicroelectronics LD1117 regulators with identical electrical specifications except for dropout voltage and operating temperature range. LD1117S50TR offers lower dropout voltage (1.2V @ 800mA versus 1.3V @ 800mA) and operates from 0°C to 125°C. LD1117S50CTR operates from -40°C to 125°C. Select based on your thermal environment and dropout voltage requirements.

Q: Why does the NCP1117LPST50T3G have such low quiescent current (700 µA)?

A: The NCP1117LPST50T3G from onsemi features an optimized design that reduces standby current consumption compared to traditional LM1117-based designs. This lower quiescent current is beneficial for battery-powered or low-power standby applications. All other electrical parameters remain equivalent to the original AP1117E50G-13.

Q: Are there any protection feature differences I should consider?

A: The AP1117E50G-13 includes both over-current and over-temperature protection. Most substitutes maintain this dual protection. The AZ1117CH-5.0TRG1 provides thermal shutdown protection. The LT1117CST-5 series provides over-temperature protection only. For applications requiring over-current protection, select NCP1117LPST50T3G, LD1117S50CTR, LD1117S50TR, or any LM1117 variant.

Q: Can I use a substitute with a higher maximum input voltage than the original 18V specification?

A: The AP1117E50G-13 specifies 18V maximum input. Most substitutes specify 15V maximum input (AZ1117CH-5.0TRG1, LD1117S50CTR, LD1117S50TR, LM1117 series, LT1117CST-5 series). NCP1117LPST50T3G matches the 18V specification. If your circuit applies voltages above 15V, use NCP1117LPST50T3G or verify that your actual input voltage remains within the 15V limit of other substitutes.

Q: What packaging options are available for high-volume production?

A: Cut Tape (CT) and Digi-Reel packaging is available for AZ1117CH-5.0TRG1, NCP1117LPST50T3G, and all LD1117 and LM1117 variants. Tube packaging is available for LT1117CST-5#PBF. Tape & Reel (TR) packaging is available for LT1117CST-5#TRPBF. Verify packaging availability with your supplier for your production volume requirements.

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