AS7805ADTR-E1 Equivalent & Substitute Parts

Part Overview

The AS7805ADTR-E1 is a linear voltage regulator IC from Diodes Incorporated, classified as a positive fixed output 5V 1A power management component in TO-252-3 surface mount packaging. This part is currently active in production with 22,800 units in stock. Linear voltage regulators of this specification are essential in power supply circuits requiring stable 5V output with 1A current capacity. Substitute parts may be required due to supply constraints, manufacturing discontinuation, or design optimization across equivalent product lines from alternative manufacturers.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Part Number	AS7805ADTR-E1
Category	Power Management (PMIC)
Output Voltage	5V Fixed
Output Current	1A
Input Voltage (Max)	25V
Dropout Voltage	2V @ 1A (Typ)
Package	TO-252-3 (DPAK)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AS7805ADTR-E1 is determined by the following critical parameters:

Output voltage specification: 5V fixed
Output current rating: 1A minimum
Input voltage tolerance: 25V maximum
Package compatibility: TO-252-3 (DPAK, 2 Leads + Tab, SC-63)
Surface mount mounting type
RoHS3 compliance

Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and package form factor, differing only in manufacturer or internal design revision.

Manufacturer Recommended Alternatives provide equivalent functional performance within the same package but may have minor variations in quiescent current, PSRR, protection features, or operating temperature range that remain functionally compatible for standard 5V 1A regulation applications.

Parameter Comparison

Parameter	AS7805ADTR-E1	AS7805ADTR-G1	BA17805FP-E2	BA178M05FP-E2	BA7805FP-E2	UA78M05CKVURG3	UA78M05IKVURG3
Manufacturer	Diodes Inc.	Diodes Inc.	Rohm Semi.	Rohm Semi.	Rohm Semi.	Texas Instruments	Texas Instruments
Output Voltage	5V	5V	5V	5V	5V	5V	5V
Output Current	1A	1A	1A	500mA	1A	500mA	500mA
Input Voltage (Max)	25V	25V	25V	25V	25V	25V	25V
Dropout Voltage	2V @ 1A	2V @ 1A	2V @ 1A	2V @ 500mA	2V @ 1A	2V @ 350mA	2V @ 350mA
Quiescent Current	6 mA	6 mA	4.5 mA	4.5 mA	8 mA	Not specified	Not specified
PSRR (120Hz)	70dB	70dB	78dB	78dB	78dB	80dB	80dB
Package	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3	TO-252-3
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

Full Parametric Equivalents (Direct Substitution):

AS7805ADTR-G1 from Diodes Incorporated is a parametric equivalent with identical electrical specifications and operating temperature range (-40°C ~ 125°C). This part maintains the same 1A output current, 70dB PSRR, and 6mA quiescent current as the primary part. Both parts carry ROHS3 compliance and MSL-3 moisture sensitivity rating. This substitution requires no circuit redesign.

Manufacturer Recommended Alternatives (Functional Equivalents):

BA7805FP-E2 from Rohm Semiconductor provides 1A output current with identical 5V fixed output and 25V maximum input voltage. Operating temperature range is reduced to -40°C ~ 85°C, and quiescent current is 8mA versus 6mA. PSRR is improved to 78dB. MSL rating is superior at 1 (Unlimited). This part is suitable for applications not requiring the extended 125°C upper temperature limit.

BA17805FP-E2 from Rohm Semiconductor also provides 1A output current with identical electrical specifications but reduced operating temperature to -40°C ~ 85°C and lower quiescent current of 4.5mA. PSRR is 78dB. MSL rating is 1 (Unlimited). Protection features are not specified for this variant.

UA78M05IKVURG3 from Texas Instruments provides 500mA output current (reduced from 1A) with identical 5V output and 25V input maximum. Operating temperature range matches the primary part at -40°C ~ 125°C. PSRR is superior at 80dB. This part is suitable only for applications requiring 500mA or less output current.

Parts Not Recommended for Direct Substitution:

BA178M05FP-E2 provides only 500mA output current and reduced operating temperature (-40°C ~ 85°C). Use only when current requirement does not exceed 500mA.

UA78M05CKVURG3 provides 500mA output current and reduced operating temperature range (0°C ~ 125°C), eliminating the -40°C lower limit. Use only when current requirement does not exceed 500mA and minimum operating temperature is 0°C or higher.

Frequently Asked Questions (FAQ)

Q: Can BA178M05FP-E2 replace AS7805ADTR-E1 in all applications?

A: No. BA178M05FP-E2 is rated for 500mA maximum output current, while AS7805ADTR-E1 is rated for 1A. Use BA178M05FP-E2 only in circuits where load current does not exceed 500mA. Additionally, operating temperature range is limited to -40°C ~ 85°C versus -40°C ~ 125°C for the primary part.

Q: What is the difference between AS7805ADTR-E1 and AS7805ADTR-G1?

A: These are parametric equivalents from the same manufacturer (Diodes Incorporated) with identical electrical specifications, output current (1A), operating temperature range (-40°C ~ 125°C), and package (TO-252-3). The difference is the internal design revision (E1 versus G1). Both are direct substitutes.

Q: Are all substitute parts in TO-252-3 package physically interchangeable?

A: Yes. All listed substitute parts use TO-252-3 (DPAK, 2 Leads + Tab, SC-63) surface mount packaging with identical pinout and footprint. Physical board-level substitution is possible without PCB redesign.

Q: Which substitute offers the best PSRR performance?

A: UA78M05IKVURG3 and UA78M05CKVURG3 from Texas Instruments both provide 80dB PSRR at 120Hz, compared to 70dB for the primary part and 78dB for Rohm alternatives. However, Texas Instruments parts are limited to 500mA output current.

Q: What is the impact of MSL rating differences?

A: AS7805ADTR-E1 carries MSL-3 (168 Hours), requiring controlled moisture exposure during storage and handling. Rohm alternatives (BA17805FP-E2, BA178M05FP-E2, BA7805FP-E2) carry MSL-1 (Unlimited), allowing indefinite storage without moisture control. Texas Instruments parts carry MSL-3 (168 Hours), matching the primary part.

Q: Can UA78M05CKVURG3 be used in applications requiring -40°C operation?

A: No. UA78M05CKVURG3 has a minimum operating temperature of 0°C. For applications requiring -40°C operation, use AS7805ADTR-E1, AS7805ADTR-G1, BA17805FP-E2, BA7805FP-E2, or UA78M05IKVURG3.

Q: What protection features does each part provide?

A: AS7805ADTR-E1 provides Over Temperature and Short Circuit protection. BA7805FP-E2 provides Over Current and Over Temperature protection. BA17805FP-E2 and BA178M05FP-E2 do not specify protection features. UA78M05CKVURG3 and UA78M05IKVURG3 provide Over Current, Over Temperature, and Short Circuit protection.

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