AP1117DL-13 Equivalent & Substitute Parts

Part Overview

The AP1117DL-13 is a linear voltage regulator IC from Diodes Incorporated designed for positive adjustable output applications. This Surface Mount device delivers 1A output current in a TO-252-3 (DPAK) package and supports input voltages up to 18V with adjustable output ranging from 1.25V to 5V. The part is classified as Obsolete, making identification of suitable alternatives essential for ongoing production and maintenance applications.

Substiute Parts

AP1117DL-13

Diodes IncorporatedIn Stock: 5656AP1117DL-13 Datasheet

Current PartRFQ

LD1117DTC-R

STMicroelectronicsIn Stock: 17928LD1117DTC-R Datasheet

MFR RecommendedRFQ

LD1117DTTR

STMicroelectronicsIn Stock: 17054LD1117DTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1117DL-13 is determined by the following critical parameters:

Package Compatibility: Both substitute parts maintain the TO-252-3 DPAK package, ensuring mechanical and thermal compatibility with existing PCB layouts.

Output Configuration & Type: All parts provide positive adjustable output, meeting the functional requirement for voltage regulation across the specified output range.

Voltage Parameters: Substitute parts accept maximum input voltages of 15V, which is lower than the AP1117DL-13's 18V specification. However, both maintain the 1.25V minimum output and support adjustable output up to 15V, exceeding the original 5V maximum.

Current Rating: Substitute parts deliver 800mA output current, which is lower than the original 1A specification. This represents a functional limitation that must be evaluated against application requirements.

Protection & Compliance: Both substitute parts include Over Current and Over Temperature protection, matching the original design. All parts maintain ROHS3 compliance and MSL Level 1 rating.

Product Status: Both substitute parts are classified as Active, providing long-term availability and supply chain stability compared to the Obsolete status of the original part.

Parameter Comparison

Engineering Selection Recommendations

LD1117DTC-R is the manufacturer-recommended substitute from STMicroelectronics. This part maintains identical package geometry and functional output configuration while offering Active product status for sustained supply availability. The device operates across an extended temperature range (-40°C to 125°C) and delivers improved PSRR performance at 75dB. The reduced quiescent current (5mA versus 10mA) provides efficiency benefits in low-power applications.

LD1117DTTR is an alternative substitute also from STMicroelectronics with identical functional characteristics to LD1117DTC-R. This variant operates within the standard industrial temperature range (0°C to 125°C) and features the lowest dropout voltage specification at 1.2V @ 800mA, offering superior thermal performance in current-limited applications.

Both substitute parts are ROHS3 compliant and maintain MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols. The primary design consideration is the reduced output current specification (800mA versus 1A). Applications requiring the full 1A output capacity of the original part must evaluate whether the 800mA rating of the substitutes meets functional requirements.

Frequently Asked Questions (FAQ)

Q: Can LD1117DTC-R and LD1117DTTR be used interchangeably with AP1117DL-13?

A: Both parts share identical package geometry (TO-252-3 DPAK) and functional output configuration (positive adjustable). However, the output current rating is reduced from 1A to 800mA. Substitution is valid only when application current requirements do not exceed 800mA.

Q: What is the impact of the reduced maximum input voltage (15V versus 18V)?

A: The substitute parts accept maximum input voltages of 15V compared to the original 18V specification. Applications operating at input voltages above 15V cannot use these substitutes without circuit redesign.

Q: How do the dropout voltage specifications compare?

A: The AP1117DL-13 specifies 1.4V dropout at 1A. LD1117DTC-R specifies 1.3V @ 800mA, and LD1117DTTR specifies 1.2V @ 800mA. The lower dropout voltages of the substitutes provide improved efficiency at reduced current levels.

Q: Are there temperature range differences between the substitute parts?

A: LD1117DTC-R operates from -40°C to 125°C, providing extended low-temperature performance. LD1117DTTR operates from 0°C to 125°C, matching the original part's temperature range. Selection depends on application environmental requirements.

Q: Do the substitute parts maintain the same protection features?

A: Yes. Both LD1117DTC-R and LD1117DTTR include Over Current and Over Temperature protection, identical to the AP1117DL-13.

Q: What is the significance of the improved PSRR in the substitute parts?

A: Both substitutes deliver 75dB PSRR at 120Hz compared to the original 60dB at 180Hz. This indicates superior power supply rejection ratio performance, beneficial for noise-sensitive applications.

Q: Are all parts RoHS3 compliant?

A: Yes. The AP1117DL-13 and both substitute parts (LD1117DTC-R and LD1117DTTR) are ROHS3 compliant with MSL Level 1 rating, meeting standard environmental and manufacturing requirements.