AP78L05SG-13 Equivalent & Substitute Parts

Part Overview

The AP78L05SG-13 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to provide a fixed positive 5V output at 100mA. This device is classified as a positive fixed output regulator with integrated over-temperature and short-circuit protection. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Output Configuration	Positive Fixed
Output Voltage	5V
Output Current	100mA
Input Voltage (Max)	20V
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Protection Features	Over Temperature, Short Circuit
Operating Temperature Range	-20°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP78L05SG-13 is determined by the following critical parameters:

Fixed 5V output voltage
100mA output current capability
8-SOIC package footprint compatibility
Surface mount configuration
Positive output configuration
Over-temperature and short-circuit protection

Substitute parts must maintain electrical equivalence across these parameters. Input voltage rating, quiescent current, PSRR, and operating temperature range may vary within acceptable engineering tolerances for the application. All substitute parts listed are active products with current manufacturing status, ensuring long-term availability compared to the obsolete AP78L05SG-13.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Package	Operating Temp Range	Product Status
AP78L05SG-13	Diodes Incorporated	5V	100mA	20V	8-SOIC	-20°C ~ 85°C	Obsolete
AS78L05MTR-G1	Diodes Incorporated	5V	100mA	30V	8-SOIC	-40°C ~ 125°C	Active
L78L05ABD13TR	STMicroelectronics	5V	100mA	30V	8-SOIC	-40°C ~ 125°C	Active
L78L05ACD13TR	STMicroelectronics	5V	100mA	30V	8-SOIC	0°C ~ 125°C	Active
L78L05CD13TR	STMicroelectronics	5V	100mA	30V	8-SOIC	0°C ~ 125°C	Active
LM78L05ACM/NOPB	Texas Instruments	5V	100mA	35V	8-SOIC	0°C ~ 125°C	Active
LM78L05ACMX/NOPB	Texas Instruments	5V	100mA	35V	8-SOIC	0°C ~ 125°C	Active
MC78L05ABDR2G	onsemi	5V	100mA	30V	8-SOIC	-40°C ~ 125°C	Active
MC78L05ACDR2G	onsemi	5V	100mA	30V	8-SOIC	0°C ~ 125°C	Active
NCV78L05ABDR2G	onsemi	5V	100mA	30V	8-SOIC	-40°C ~ 125°C	Active
UA78L05ACD	Texas Instruments	5V	100mA	20V	8-SOIC	0°C ~ 125°C	Active

Engineering Selection Recommendations

All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Selection should be based on the following criteria:

For extended temperature range applications (-40°C operation): AS78L05MTR-G1, L78L05ABD13TR, MC78L05ABDR2G, or NCV78L05ABDR2G provide operating ranges down to -40°C.

For automotive applications: NCV78L05ABDR2G is qualified to AEC-Q100 standard and rated for -40°C ~ 125°C operation.

For standard industrial applications (0°C ~ 125°C): L78L05ACD13TR, L78L05CD13TR, LM78L05ACM/NOPB, LM78L05ACMX/NOPB, MC78L05ACDR2G, or UA78L05ACD are suitable.

For input voltage margin: LM78L05ACM/NOPB and LM78L05ACMX/NOPB support up to 35V input, providing additional design margin over the original 20V specification.

For same-manufacturer continuity: AS78L05MTR-G1 maintains Diodes Incorporated sourcing while offering improved specifications and active product status.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AP78L05SG-13 with any of these substitute parts?

A: Yes, all listed parts are electrically equivalent for the core function of providing fixed 5V at 100mA output. The 8-SOIC package footprint is identical across all parts, enabling direct PCB replacement. Verify that your application's input voltage and operating temperature requirements fall within the substitute part's specifications.

Q: What is the difference between the various STMicroelectronics L78L05 variants?

A: L78L05ABD13TR operates from -40°C ~ 125°C, while L78L05ACD13TR and L78L05CD13TR operate from 0°C ~ 125°C. All three support 30V maximum input voltage and are supplied in Cut Tape & Digi-Reel packaging.

Q: Why do some parts have higher input voltage ratings (30V or 35V) than the original AP78L05SG-13 (20V)?

A: Higher input voltage ratings provide additional design margin and flexibility for applications with variable input supplies. These parts remain functionally equivalent and can be used in circuits designed for 20V maximum input without modification.

Q: Is NCV78L05ABDR2G suitable for non-automotive applications?

A: Yes. NCV78L05ABDR2G meets AEC-Q100 automotive qualification but functions identically to standard industrial-grade regulators. It can be used in any application requiring the specified electrical characteristics.

Q: What packaging options are available?

A: All substitute parts use the 8-SOIC surface mount package with 0.154" width (3.90mm). Packaging formats vary by supplier: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel, or Tube. Select based on procurement and assembly requirements.

Q: Are there differences in quiescent current between substitute parts?

A: Yes. Quiescent current ranges from 3mA (Texas Instruments LM78L05 series) to 6mA (onsemi MC78L05 and NCV78L05 series). For battery-powered or low-power standby applications, lower quiescent current may be advantageous.

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