AS78L15RTR-E1 Equivalent & Substitute Parts

Part Overview

The AS78L15RTR-E1 is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to provide a fixed positive 15V output at 100mA. This Surface Mount device operates across an input voltage range up to 36V with a maximum dropout voltage of 1.8V at full load current. The part is currently Active in product status and widely used in power management applications requiring stable low-current regulated voltage supplies.

Identifying equivalent and substitute parts is necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when inventory constraints necessitate sourcing from alternative stock positions while maintaining identical electrical performance and reliability characteristics.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	15V
Output Current	100mA
Input Voltage (Max)	36V
Dropout Voltage (Max)	1.8V @ 100mA (Typ)
Quiescent Current	6 mA
PSRR	39dB (120Hz)
Operating Temperature Range	-40°C ~ 125°C
Package / Case	TO-243AA (SOT-89-3)
Mounting Type	Surface Mount
Protection Features	Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AS78L15RTR-E1 are identified based on strict electrical and mechanical parameter matching. The primary substitution criterion is that all electrical specifications—including output voltage, output current, input voltage range, dropout voltage, quiescent current, PSRR, operating temperature range, and protection features—must be identical to the main part number.

The AS78L15RTR-E1 and its substitute AS78L15RTR-G1 share the same base product number (AS78L15) and are differentiated only by packaging format. Both parts maintain identical electrical performance and are housed in the same TO-243AA (SOT-89-3) package for Surface Mount applications. The substitution is valid because:

Output voltage specification: 15V (Fixed)
Output current capability: 100mA
Input voltage maximum: 36V
Dropout voltage: 1.8V @ 100mA (Typ)
Quiescent current: 6 mA
PSRR: 39dB (120Hz)
Operating temperature: -40°C ~ 125°C
Protection features: Over Temperature, Short Circuit
Package compatibility: TO-243AA (SOT-89-3)
Compliance: ROHS3 Compliant, REACH Unaffected

Parameter Comparison

Parameter	AS78L15RTR-E1	AS78L15RTR-G1
Manufacturer	Diodes Incorporated	Diodes Incorporated
Category	Power Management (PMIC)	Power Management (PMIC)
Description	IC REG LINEAR 15V 100MA SOT89	IC REG LINEAR 15V 100MA SOT89
Output Configuration	Positive	Positive
Output Type	Fixed	Fixed
Number of Regulators	1	1
Voltage - Input (Max)	36V	36V
Voltage - Output (Min/Fixed)	15V	15V
Voltage Dropout (Max)	1.8V @ 100mA (Typ)	1.8V @ 100mA (Typ)
Current - Output	100mA	100mA
Current - Quiescent (Iq)	6 mA	6 mA
PSRR	39dB (120Hz)	39dB (120Hz)
Protection Features	Over Temperature, Short Circuit	Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	TO-243AA	TO-243AA
Supplier Device Package	SOT-89-3	SOT-89-3
Base Product Number	AS78L15	AS78L15
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8542.39.0001	8542.39.0001
Product Status	Active	Active

Engineering Selection Recommendations

Both the AS78L15RTR-E1 and AS78L15RTR-G1 are Active products from Diodes Incorporated with identical electrical specifications and compliance certifications. Selection between these parts should be based on packaging and supply chain requirements rather than electrical performance, as they are functionally equivalent.

The AS78L15RTR-E1 and AS78L15RTR-G1 are suitable for applications requiring a fixed 15V regulated output at currents up to 100mA with input voltages up to 36V. Both parts meet ROHS3 compliance requirements and carry REACH Unaffected status, making them appropriate for regulated markets. The identical operating temperature range of -40°C to 125°C and protection features (Over Temperature and Short Circuit) ensure reliable operation across industrial and commercial temperature environments.

Frequently Asked Questions (FAQ)

Q: Can AS78L15RTR-G1 be used as a direct replacement for AS78L15RTR-E1?

A: Yes. Both parts are manufactured by Diodes Incorporated with identical electrical specifications, output voltage (15V), output current (100mA), input voltage range (36V max), dropout voltage (1.8V @ 100mA), quiescent current (6 mA), PSRR (39dB @ 120Hz), operating temperature range (-40°C to 125°C), and protection features. They share the same TO-243AA (SOT-89-3) package for Surface Mount applications.

Q: What is the difference between AS78L15RTR-E1 and AS78L15RTR-G1?

A: The parts differ only in packaging format designation. AS78L15RTR-E1 uses standard packaging, while AS78L15RTR-G1 is supplied in Tape & Reel (TR) format. The electrical performance and physical package dimensions remain identical.

Q: Are both parts suitable for my -40°C to 125°C operating environment?

A: Yes. Both AS78L15RTR-E1 and AS78L15RTR-G1 are rated for -40°C to 125°C operation, making them suitable for industrial and extended temperature applications.

Q: Do both parts provide the same protection features?

A: Yes. Both parts include Over Temperature and Short Circuit protection features, ensuring equivalent reliability and safety characteristics in circuit applications.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 Compliant, REACH Unaffected, and carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: Can I use these parts interchangeably in my PCB design?

A: Yes. Both parts use the same TO-243AA (SOT-89-3) Surface Mount package with identical pinout and footprint, allowing direct PCB substitution without layout modifications.

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