LM78L05ACM Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM78L05ACM is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed 5V output applications with 100mA current capacity in an 8-SOIC surface mount package. This device is classified as Last Time Buy, indicating limited availability from the original manufacturer. Identifying qualified substitute parts ensures design continuity and supply chain reliability for applications requiring 5V regulation in compact form factors.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LM78L05ACM
Category	Power Management (PMIC)
Output Voltage (Fixed)	5V
Output Current	100mA
Input Voltage (Max)	35V
Quiescent Current	3 mA
PSRR	62dB (120Hz)
Package	8-SOIC (0.154", 3.90mm Width)
Operating Temperature	0°C ~ 125°C
Protection Features	Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitute parts for the LM78L05ACM are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Output voltage: 5V fixed
Output current capacity: 100mA
Package type: 8-SOIC surface mount
Package dimensions: 0.154" width (3.90mm)
Output configuration: Positive
Number of regulators: 1
RoHS3 compliance
MSL rating: 1 (Unlimited)

Acceptable Variation Parameters:

Input voltage maximum: 30V to 35V (all substitutes operate within this range)
Quiescent current: 3mA to 6mA (minor variation acceptable for equivalent function)
PSRR: 49dB to 62dB (performance specification variation)
Operating temperature range: 0°C to 125°C or -40°C to 125°C (extended range acceptable)
Protection features: Over Temperature and Short Circuit minimum; Over Current acceptable as additional feature

All substitute parts maintain identical pinout, package footprint, and functional output specifications required for direct board-level replacement.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Quiescent Current	PSRR (120Hz)	Operating Temp	Product Status	Inventory
LM78L05ACM	Texas Instruments	5V	100mA	35V	3 mA	62dB	0°C ~ 125°C	Last Time Buy	15,723 Pcs
LM78L05ACM/NOPB	Texas Instruments	5V	100mA	35V	3 mA	62dB	0°C ~ 125°C	Active	1,601 Pcs
L78L05ABD13TR	STMicroelectronics	5V	100mA	30V	5.5 mA	49dB	-40°C ~ 125°C	Active	125,200 Pcs
L78L05ACD13TR	STMicroelectronics	5V	100mA	30V	5.5 mA	49dB	0°C ~ 125°C	Active	106,100 Pcs
L78L05CD13TR	STMicroelectronics	5V	100mA	30V	5.5 mA	49dB	0°C ~ 125°C	Active	2,498 Pcs
MC78L05ABDR2G	onsemi	5V	100mA	30V	6 mA	49dB	-40°C ~ 125°C	Active	82,050 Pcs
MC78L05ACDR2G	onsemi	5V	100mA	30V	6 mA	49dB	0°C ~ 125°C	Active	41,200 Pcs
NCV78L05ABDR2G	onsemi	5V	100mA	30V	6 mA	49dB	-40°C ~ 125°C	Active	19,349 Pcs

Engineering Selection Recommendations

Primary Recommendation: LM78L05ACM/NOPB This Texas Instruments part maintains identical electrical specifications to the main part number, including the superior 62dB PSRR and 3mA quiescent current. Active product status ensures continued availability. Select this part when original performance characteristics and manufacturer continuity are required.

Secondary Recommendation: L78L05ACD13TR STMicroelectronics part with Active status and 106,100 units in stock. Matches the 0°C to 125°C operating temperature range of the original. Acceptable for applications where the 30V maximum input voltage and 5.5mA quiescent current meet design requirements. Higher inventory availability supports supply chain stability.

Alternative for Extended Temperature: L78L05ABD13TR or MC78L05ABDR2G Both parts support -40°C to 125°C operating range. Select when designs require extended low-temperature operation. L78L05ABD13TR offers highest inventory (125,200 units). MC78L05ABDR2G provides onsemi sourcing option with 82,050 units available.

Automotive Grade Option: NCV78L05ABDR2G onsemi automotive-qualified part (AEC-Q100) with -40°C to 125°C range. Select only when automotive qualification is a design requirement.

All substitute parts are ROHS3 compliant with MSL 1 rating, matching the original part's environmental and regulatory status.

Frequently Asked Questions (FAQ)

Q: Can LM78L05ACM/NOPB be used as a direct replacement for LM78L05ACM? A: Yes. Both parts are Texas Instruments products with identical electrical specifications, package, and pinout. The /NOPB designation indicates lead-free plating. Direct board-level substitution is supported.

Q: What is the difference between the STMicroelectronics L78L05 variants (ABD13TR, ACD13TR, CD13TR)? A: The variants differ in operating temperature range. L78L05ABD13TR and L78L05ACD13TR support -40°C to 125°C and 0°C to 125°C respectively. L78L05CD13TR also operates 0°C to 125°C. All three share identical electrical performance and 8-SOIC packaging. Select based on your application's temperature requirements.

Q: Are onsemi MC78L05 and NCV78L05 parts pin-compatible with the LM78L05ACM? A: Yes. All parts use the same 8-SOIC package with identical pinout. MC78L05ABDR2G and MC78L05ACDR2G are standard industrial grade. NCV78L05ABDR2G is automotive-qualified. All support direct PCB replacement.

Q: What is the impact of the 30V maximum input voltage on STMicroelectronics and onsemi parts versus the 35V specification of the original? A: The 30V maximum input voltage is acceptable for most 5V regulator applications. If your design uses input voltages between 30V and 35V, verify the application circuit does not exceed 30V, or select the LM78L05ACM/NOPB which maintains the 35V rating.

Q: Why do substitute parts show higher quiescent current (5.5mA to 6mA) compared to the original (3mA)? A: Quiescent current variation reflects different semiconductor process technology between manufacturers. For 100mA output applications, this 2-3mA difference has minimal impact on overall system power consumption. Select based on your specific power budget requirements.

Q: Is the 49dB PSRR of substitute parts adequate compared to the original 62dB specification? A: The 49dB PSRR is suitable for standard 5V regulation applications. If your design requires superior noise rejection or operates in high-noise environments, the LM78L05ACM/NOPB with 62dB PSRR is preferred. For typical applications, 49dB provides adequate power supply rejection.

Q: Can I use NCV78L05ABDR2G in non-automotive applications? A: Yes. Automotive-qualified parts exceed industrial specifications and are fully compatible with non-automotive designs. Use when extended temperature range (-40°C to 125°C) is required, regardless of application type.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message