AP1118D33L-13 Equivalent & Substitute Parts

Part Overview

The AP1118D33L-13 is a linear voltage regulator IC from Diodes Incorporated designed to deliver a fixed 3.3V output at 1A maximum current in a TO-252-5 surface mount package. This device is classified as obsolete, making identification of suitable alternatives necessary for ongoing design support and production continuity. The regulator features integrated over-current and over-temperature protection with an enable control function, suitable for applications requiring stable 3.3V power delivery from input sources up to 18V.

Substiute Parts

AP1118D33L-13

Diodes IncorporatedIn Stock: 834AP1118D33L-13 Datasheet

Current PartRFQ

AP1507-33D5L-13

Diodes IncorporatedIn Stock: 1673AP1507-33D5L-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP1118D33L-13 is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• Package compatibility: TO-252-6, DPAK (5 Leads + Tab)
• Surface mount mounting type
• Positive output configuration
• Single output regulator topology

The AP1507-33D5L-13 qualifies as a substitute based on matching output voltage (3.3V fixed), identical package format (TO-252-6, DPAK), and surface mount compatibility. While the AP1507 operates as a buck switching regulator rather than a linear regulator, it maintains the same physical footprint and electrical output specification, enabling direct board-level replacement in applications where the higher output current capability (3A vs. 1A) and improved efficiency do not create design conflicts.

Parameter Comparison

Engineering Selection Recommendations

The AP1507-33D5L-13 serves as a direct substitute for the AP1118D33L-13 based on electrical output specification and physical package compatibility. Both devices are ROHS3 compliant and manufactured by Diodes Incorporated, ensuring regulatory alignment and supply chain consistency.

The primary distinction between these parts is the regulator topology: the AP1118D33L-13 employs linear regulation, while the AP1507-33D5L-13 uses buck switching topology. This difference results in higher efficiency in the AP1507 and increased output current capability (3A versus 1A), which may benefit power-constrained applications. The AP1507 also accepts higher maximum input voltage (22V versus 18V).

Both devices are currently unavailable through standard distribution channels, with the AP1118D33L-13 classified as obsolete and the AP1507-33D5L-13 discontinued at DiGi Electronics. Component selection should account for existing inventory status and long-term availability planning.

Frequently Asked Questions (FAQ)

Q: Can the AP1507-33D5L-13 replace the AP1118D33L-13 on existing PCBs?

A: Yes. Both devices use identical TO-252-6, DPAK (5 Leads + Tab) packaging and surface mount configuration, enabling direct board-level substitution without layout modifications.

Q: What is the primary functional difference between these regulators?

A: The AP1118D33L-13 is a linear voltage regulator, while the AP1507-33D5L-13 is a buck switching regulator. Linear regulators dissipate excess voltage as heat, while switching regulators convert input voltage more efficiently. The AP1507 provides higher output current (3A versus 1A) and operates with higher maximum input voltage (22V versus 18V).

Q: Are there thermal or noise considerations when substituting the AP1507 for the AP1118?

A: The AP1507 switching topology generates higher-frequency noise compared to the linear AP1118. Applications sensitive to switching noise may require additional filtering. Thermal performance differs due to the efficiency advantage of switching regulation; the AP1507 generates less heat under equivalent load conditions.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the AP1118D33L-13 and AP1507-33D5L-13 are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements.

Q: What is the operating temperature range difference?

A: The AP1118D33L-13 operates from 0°C to 150°C (junction temperature), while the AP1507-33D5L-13 operates from -20°C to 85°C (ambient temperature). Application temperature requirements should be evaluated against these specifications.