AP1117DG-13 Equivalent & Substitute Parts

Part Overview

The AP1117DG-13 is a linear voltage regulator IC from Diodes Incorporated, classified as a positive adjustable output regulator with 1A output capacity in TO-252-3 surface mount packaging. This device is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

The AP1117DG-13 serves applications requiring adjustable positive voltage regulation from 1.25V to 5V with input voltages up to 18V. As an obsolete product, sourcing alternatives from active product lines ensures long-term component availability and supply chain continuity.

Substiute Parts

AP1117DG-13

Diodes IncorporatedIn Stock: 35431AP1117DG-13 Datasheet

Current PartRFQ

AZ1117CD-ADJTRG1

Diodes IncorporatedIn Stock: 35448AZ1117CD-ADJTRG1 Datasheet

MFR RecommendedRFQ

LD1117DTTR

STMicroelectronicsIn Stock: 17054LD1117DTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP1117DG-13 is determined by the following critical parameters:

• Package Compatibility: All substitutes must use TO-252-3 (DPAK) surface mount packaging to ensure PCB footprint compatibility
• Output Configuration: Positive adjustable output topology required
• Voltage Range: Output adjustability from 1.25V minimum, with maximum output voltage capability meeting or exceeding 5V
• Current Capacity: Minimum 800mA output current (AP1117DG-13 rated at 1A)
• Input Voltage Rating: Maximum input voltage of 15V or higher to accommodate the original 18V specification
• Regulatory Compliance: ROHS3 compliance and surface mount mounting type maintained

The two substitute parts listed below meet these criteria while offering active product status and improved or equivalent electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

AZ1117CD-ADJTRG1 is the primary substitute from Diodes Incorporated, maintaining manufacturer continuity with the original AP1117DG-13. This part carries active product status and is available in Tape & Reel packaging. The AZ1117CD-ADJTRG1 provides equivalent 1A output current and adjustable output voltage range. The maximum input voltage specification of 15V represents a reduction from the original 18V rating; applications requiring input voltages above 15V must use the LD1117DTTR alternative. The AZ1117CD-ADJTRG1 offers improved quiescent current (5 mA vs. 10 mA) and superior PSRR performance (70dB vs. 60dB).

LD1117DTTR from STMicroelectronics provides an alternative from a different manufacturer with active product status. This device delivers superior PSRR (75dB) and lower dropout voltage (1.2V @ 800mA). The output current is rated at 800mA, which is lower than the original 1A specification. The LD1117DTTR accommodates maximum input voltages of 15V and supports output voltage adjustment up to 15V. This part is suitable for applications where the 800mA output current meets design requirements.

Both substitutes maintain TO-252-3 packaging, ROHS3 compliance, and surface mount mounting type. Selection between these options depends on output current requirements and input voltage specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can the AZ1117CD-ADJTRG1 directly replace the AP1117DG-13 in all applications?

A: The AZ1117CD-ADJTRG1 is pin-compatible and functionally equivalent for applications with input voltages up to 15V and output voltage requirements within the 1.25V to 13.6V range. Applications requiring input voltages above 15V or output voltages above 13.6V require design review.

Q: What is the key difference between AZ1117CD-ADJTRG1 and LD1117DTTR?

A: The primary differences are manufacturer (Diodes Incorporated vs. STMicroelectronics), output current rating (1A vs. 800mA), and maximum output voltage (13.6V vs. 15V). The LD1117DTTR offers superior PSRR and lower dropout voltage. Selection depends on specific current and voltage requirements.

Q: Are both substitutes available in the same packaging as the original AP1117DG-13?

A: Yes, both AZ1117CD-ADJTRG1 and LD1117DTTR use TO-252-3 (DPAK) surface mount packaging, ensuring PCB footprint compatibility with the original design.

Q: What is the impact of the reduced maximum input voltage (15V vs. 18V) on the AZ1117CD-ADJTRG1?

A: Applications with input voltage sources limited to 15V or below are unaffected. Designs requiring input voltages between 15V and 18V must use the LD1117DTTR or reconsider the input voltage specification.

Q: Does the lower output current rating of LD1117DTTR (800mA vs. 1A) affect compatibility?

A: The LD1117DTTR is suitable only for applications where the maximum load current does not exceed 800mA. Applications requiring sustained output currents above 800mA must use the AZ1117CD-ADJTRG1 or maintain the original AP1117DG-13 if available.

Q: Are there temperature range differences between the substitutes?

A: The AZ1117CD-ADJTRG1 supports an extended operating temperature range of -20°C to 125°C, compared to 0°C to 125°C for both the AP1117DG-13 and LD1117DTTR. Applications requiring operation below 0°C benefit from the AZ1117CD-ADJTRG1.