AP1117EL-13 Equivalent & Substitute Parts

Part Overview

The AP1117EL-13 is a linear voltage regulator IC with positive adjustable output, rated for 1A maximum output current in SOT-223-3 surface mount packaging. Manufactured by Diodes Incorporated, this part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The AP1117EL-13 operates across an input voltage range up to 18V with adjustable output from 1.25V to 5V, incorporating over-current and over-temperature protection features suitable for power management applications requiring compact form factors.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP1117EL-13
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Voltage - Input (Max)	18V
Voltage - Output (Min/Fixed)	1.25V
Voltage - Output (Max)	5V
Current - Output	1A
Voltage Dropout (Max)	1.4V @ 1A
Current - Quiescent (Iq)	10 mA
PSRR	60dB (180Hz)
Protection Features	Over Current, Over Temperature
Operating Temperature	0°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-3
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the AP1117EL-13 is determined by the following critical parameters:

Output configuration (positive adjustable)
Output voltage range capability (minimum 1.25V, maximum at least 5V)
Maximum output current (1A or higher)
Maximum input voltage (15V or higher)
Voltage dropout characteristics
Surface mount SOT-223 packaging compatibility
Protection features (over-current and over-temperature)
RoHS3 compliance and regulatory status

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

Category 1: 1A Output Current – AZ1117CH-ADJTRG1 maintains the original 1A specification with improved quiescent current (5mA vs 10mA) and higher PSRR (70dB vs 60dB).

Category 2: 800mA Output Current – LD1117SC-R, LD1117STR, TLV1117CDCY, TLV1117CDCYG3, TLV1117CDCYR, TLV1117CDCYRG3, TLV1117IDCY, TLV1117IDCYG3, and TLV1117IDCYR provide functional equivalence with reduced output current rating. These parts offer active product status, improved PSRR (75dB), and lower quiescent current (5mA).

Parameter Comparison

Part Number	Manufacturer	Output Current	Voltage - Input (Max)	Voltage - Output (Max)	Voltage Dropout (Max)	Current - Quiescent (Iq)	PSRR	Operating Temperature	Product Status	Packaging
AP1117EL-13	Diodes Incorporated	1A	18V	5V	1.4V @ 1A	10 mA	60dB (180Hz)	0°C ~ 125°C	Obsolete	SOT-223-3
AZ1117CH-ADJTRG1	Diodes Incorporated	1A	15V	13.7V	1.3V @ 800mA	5 mA	70dB (120Hz)	-20°C ~ 125°C	Active	SOT-223-3
LD1117SC-R	STMicroelectronics	800mA	15V	15V	1.3V @ 800mA	5 mA	75dB (120Hz)	-40°C ~ 125°C	Active	SOT-223
LD1117STR	STMicroelectronics	800mA	15V	15V	1.2V @ 800mA	5 mA	75dB (120Hz)	0°C ~ 125°C	Active	SOT-223
TLV1117CDCY	Texas Instruments	800mA	15V	13.7V	1.3V @ 800mA	10 mA	75dB (120Hz)	0°C ~ 125°C	Last Time Buy	SOT-223-4
TLV1117CDCYG3	Texas Instruments	800mA	15V	13.7V	1.3V @ 800mA	10 mA	75dB (120Hz)	0°C ~ 125°C	Last Time Buy	SOT-223-4
TLV1117CDCYR	Texas Instruments	800mA	15V	13.7V	1.3V @ 800mA	10 mA	75dB (120Hz)	0°C ~ 125°C	Active	SOT-223-4
TLV1117CDCYRG3	Texas Instruments	800mA	15V	13.7V	1.3V @ 800mA	10 mA	75dB (120Hz)	0°C ~ 125°C	Active	SOT-223-4
TLV1117IDCY	Texas Instruments	800mA	15V	13.7V	1.3V @ 800mA	10 mA	75dB (120Hz)	-40°C ~ 125°C	Last Time Buy	SOT-223-4
TLV1117IDCYG3	Texas Instruments	800mA	15V	13.7V	1.3V @ 800mA	10 mA	75dB (120Hz)	-40°C ~ 125°C	Last Time Buy	SOT-223-4
TLV1117IDCYR	Texas Instruments	800mA	15V	13.7V	1.3V @ 800mA	10 mA	75dB (120Hz)	-40°C ~ 125°C	Active	SOT-223-4

Engineering Selection Recommendations

Primary Recommendation: AZ1117CH-ADJTRG1

The AZ1117CH-ADJTRG1 from Diodes Incorporated is the preferred direct substitute. It maintains the 1A output current specification of the AP1117EL-13, operates with active product status ensuring long-term availability, and provides improved performance characteristics including lower quiescent current (5mA vs 10mA) and higher PSRR (70dB vs 60dB). Both parts are manufactured by Diodes Incorporated and share identical SOT-223-3 packaging. The AZ1117CH-ADJTRG1 extends the operating temperature range to -20°C ~ 125°C and reduces maximum input voltage to 15V, which remains compatible with most applications designed for the AP1117EL-13.

Secondary Recommendations: 800mA Alternatives

For applications where 800mA output current is acceptable, the following active-status parts provide superior performance:

TLV1117CDCYR (Texas Instruments): Active product status with highest inventory availability (65,400 pcs), 75dB PSRR, and 0°C ~ 125°C operating range matching the original part's temperature specification.
TLV1117IDCYR (Texas Instruments): Active product status with extended operating temperature range (-40°C ~ 125°C), suitable for industrial and automotive applications requiring wider temperature margins.
LD1117STR (STMicroelectronics): Active product status with lowest voltage dropout (1.2V @ 800mA), extended operating temperature range (-40°C ~ 125°C), and highest maximum output voltage (15V).

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and identical regulatory classifications (EAR99, HTSUS 8542.39.0001) as the original AP1117EL-13.

Frequently Asked Questions (FAQ)

Q: Can the AZ1117CH-ADJTRG1 directly replace the AP1117EL-13 without circuit modifications?

A: Yes. The AZ1117CH-ADJTRG1 maintains identical output current (1A), adjustable output voltage range (1.25V minimum), and SOT-223-3 packaging. The reduced maximum input voltage (15V vs 18V) and maximum output voltage (13.7V vs 5V) are not limiting factors for most applications. Pin-to-pin compatibility and functional equivalence are confirmed.

Q: Why do the 800mA alternatives have lower output current than the original AP1117EL-13?

A: The 800mA parts represent the current generation of adjustable linear regulators from major manufacturers. While output current is reduced, these parts offer improved performance metrics including lower quiescent current, higher PSRR, and active product status ensuring long-term supply. Selection depends on application current requirements.

Q: What is the difference between TLV1117CDCYR and TLV1117IDCYR?

A: Both parts are functionally identical with identical electrical specifications. The primary difference is operating temperature range: TLV1117CDCYR operates 0°C ~ 125°C (commercial grade), while TLV1117IDCYR operates -40°C ~ 125°C (industrial grade). Select based on application temperature requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and REACH unaffected status, matching the regulatory compliance of the original AP1117EL-13.

Q: What is the significance of "Last Time Buy" product status for TLV1117 variants?

A: Last Time Buy status indicates Texas Instruments has announced end-of-life for these parts. While currently available, inventory is finite and will not be replenished. For new designs, prioritize Active status parts (TLV1117CDCYR, TLV1117CDCYRG3, TLV1117IDCYR) or the AZ1117CH-ADJTRG1 to ensure long-term supply continuity.

Q: Can I use LD1117STR in applications requiring the full 1A output current of the AP1117EL-13?

A: No. The LD1117STR is rated for maximum 800mA output current. Applications requiring sustained 1A output must use either the AP1117EL-13, AZ1117CH-ADJTRG1, or equivalent 1A-rated regulators. Exceeding the 800mA rating will trigger over-current protection.

Q: What packaging differences exist between substitute parts?

A: The AP1117EL-13 and AZ1117CH-ADJTRG1 use SOT-223-3 packaging. Most Texas Instruments TLV1117 variants use SOT-223-4 packaging, which is physically compatible but has four pins instead of three. STMicroelectronics LD1117 parts use standard SOT-223 packaging. All are surface mount compatible with identical footprint dimensions suitable for TO-261-4 and TO-261AA land patterns.

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