BA17805FP-E2 Linear Voltage Regulator: Equivalent & Substitute Parts

Part Overview

The BA17805FP-E2 is a positive fixed linear voltage regulator manufactured by Rohm Semiconductor, rated for 5V output at 1A maximum current in a TO-252-3 surface mount package. This device is classified as active product status and is RoHS3 compliant. Substitute parts are necessary when the primary part is unavailable, when alternative sourcing is required for supply chain resilience, or when design specifications permit operation within the electrical and mechanical tolerances of equivalent regulators.

Key Parameters

Parameter	BA17805FP-E2
Manufacturer	Rohm Semiconductor
Output Voltage (Fixed)	5V
Maximum Output Current	1A
Maximum Input Voltage	25V
Maximum Dropout Voltage	2V @ 1A (Typ)
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	RoHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria applied strictly to the provided parameters:

Primary Substitution Criteria:

Output voltage fixed at 5V
TO-252-3 package compatibility (identical mechanical and thermal interface)
Surface mount mounting type
RoHS3 compliance
Active product status

Secondary Compatibility Parameters:

Maximum input voltage ≥ 25V
Maximum output current ≥ 1A (or lower if application permits reduced current capacity)
Maximum dropout voltage ≤ 2V @ rated current (or lower)
Operating temperature range that encompasses or exceeds -40°C ~ 85°C

Parts are grouped into two categories based on output current capacity: full-capacity substitutes (1A or higher) and reduced-capacity substitutes (below 1A, suitable only for applications with lower current requirements).

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Max Input Voltage	Dropout Voltage (Typ)	Package	Temp Range	RoHS Status	Product Status
BA17805FP-E2	Rohm Semiconductor	5V	1A	25V	2V @ 1A	TO-252-3	-40°C ~ 85°C	RoHS3	Active
AS7805ADTR-E1	Diodes Incorporated	5V	1A	25V	2V @ 1A	TO-252-3	-40°C ~ 125°C	RoHS3	Active
AS7805ADTR-G1	Diodes Incorporated	5V	1A	25V	2V @ 1A	TO-252-3	-40°C ~ 125°C	RoHS3	Active
UA78M05CKVURG3	Texas Instruments	5V	500mA	25V	2V @ 350mA	TO-252-3	0°C ~ 125°C	RoHS3	Active
UA78M05IKVURG3	Texas Instruments	5V	500mA	25V	2V @ 350mA	TO-252-3	-40°C ~ 125°C	RoHS3	Active
TL750M05CKVURG3	Texas Instruments	5V	750mA	26V	0.6V @ 750mA	TO-252-3	0°C ~ 125°C	RoHS3	Active
TL750M05QKVURQ1	Texas Instruments	5V	750mA	26V	0.6V @ 750mA	TO-252-3	-40°C ~ 125°C	RoHS3	Active
LP2950CDT-5.0/NOPB	National Semiconductor	5V	100mA	30V	0.6V @ 100mA	TO-252-3	-40°C ~ 125°C	Not specified	Active
LP2950CDTX-5.0/NOPB	National Semiconductor	5V	100mA	30V	0.6V @ 100mA	TO-252-3	-40°C ~ 125°C	Not specified	Active

Engineering Selection Recommendations

Full-Capacity Substitutes (1A Output Current):

AS7805ADTR-E1 and AS7805ADTR-G1 from Diodes Incorporated are direct electrical and mechanical equivalents to the BA17805FP-E2. Both devices maintain 1A output current, 5V fixed output, TO-252-3 package compatibility, and RoHS3 compliance. Both are active products. AS7805ADTR-G1 offers higher inventory availability (52,900 units) compared to AS7805ADTR-E1 (22,800 units). Both support extended operating temperature ranges (-40°C ~ 125°C) beyond the BA17805FP-E2 specification.

Reduced-Capacity Substitutes (500mA Output Current):

UA78M05CKVURG3 and UA78M05IKVURG3 from Texas Instruments are suitable only for applications where maximum output current does not exceed 500mA. Both maintain 5V fixed output, TO-252-3 package compatibility, and RoHS3 compliance. UA78M05IKVURG3 provides superior inventory (107,710 units) and supports the full temperature range (-40°C ~ 125°C). UA78M05CKVURG3 is limited to 0°C ~ 125°C operation.

Reduced-Capacity Substitutes (750mA Output Current):

TL750M05CKVURG3 and TL750M05QKVURQ1 from Texas Instruments are suitable for applications where maximum output current does not exceed 750mA. Both maintain 5V fixed output, TO-252-3 package compatibility, and RoHS3 compliance. TL750M05QKVURQ1 is qualified to AEC-Q100 automotive standards and supports -40°C ~ 125°C operation. TL750M05CKVURG3 is limited to 0°C ~ 125°C operation but offers lower dropout voltage (0.6V @ 750mA).

Micropower Substitutes (100mA Output Current):

LP2950CDT-5.0/NOPB and LP2950CDTX-5.0/NOPB from National Semiconductor are suitable only for applications where maximum output current does not exceed 100mA. Both maintain 5V fixed output, TO-252-3 package compatibility, and support -40°C ~ 125°C operation. These devices feature significantly lower quiescent current (120 µA) and superior dropout voltage performance (0.6V @ 100mA), making them suitable for low-power applications. RoHS status is not specified for these parts.

Frequently Asked Questions (FAQ)

Q: Can AS7805ADTR-E1 or AS7805ADTR-G1 be used as direct replacements for BA17805FP-E2?

A: Yes. Both Diodes Incorporated parts are direct substitutes. They maintain identical output voltage (5V), output current (1A), maximum input voltage (25V), dropout voltage (2V @ 1A), and TO-252-3 package configuration. All three parts are RoHS3 compliant and active products. The Diodes parts support extended temperature operation (-40°C ~ 125°C) compared to the BA17805FP-E2 (-40°C ~ 85°C).

Q: Can UA78M05CKVURG3 or UA78M05IKVURG3 replace the BA17805FP-E2 in all applications?

A: No. These Texas Instruments parts are limited to 500mA maximum output current, compared to the BA17805FP-E2 specification of 1A. They are suitable only for applications where the load current does not exceed 500mA. Both parts maintain 5V output, TO-252-3 package compatibility, and RoHS3 compliance. UA78M05IKVURG3 supports the full temperature range (-40°C ~ 125°C); UA78M05CKVURG3 is limited to 0°C ~ 125°C.

Q: What is the difference between TL750M05CKVURG3 and TL750M05QKVURQ1?

A: Both parts provide 750mA output current at 5V in TO-252-3 packages with RoHS3 compliance. TL750M05QKVURQ1 is qualified to AEC-Q100 automotive standards and supports -40°C ~ 125°C operation. TL750M05CKVURG3 is limited to 0°C ~ 125°C operation. TL750M05QKVURQ1 is supplied in Cut Tape (CT) packaging; TL750M05CKVURG3 packaging is not specified. Both are suitable only for applications where output current does not exceed 750mA.

Q: Are LP2950CDT-5.0/NOPB and LP2950CDTX-5.0/NOPB suitable for the BA17805FP-E2 application?

A: These National Semiconductor parts are suitable only for low-power applications where maximum output current does not exceed 100mA. They maintain 5V output and TO-252-3 package compatibility. Both support -40°C ~ 125°C operation and feature significantly lower quiescent current (120 µA) and superior dropout voltage (0.6V @ 100mA). RoHS compliance status is not specified. These parts are not suitable for applications requiring 1A output current.

Q: What package compatibility should be verified when selecting a substitute?

A: All listed substitute parts use the TO-252-3 package (DPAK with 2 Leads + Tab, SC-63 designation). This package is mechanically and thermally compatible with the BA17805FP-E2. All parts are surface mount devices. No package conversion or PCB redesign is required when substituting between these parts.

Q: Which substitute offers the best inventory availability?

A: UA78M05IKVURG3 from Texas Instruments offers the highest inventory (107,710 units). However, this part is limited to 500mA output current. For full 1A capacity substitutes, AS7805ADTR-G1 from Diodes Incorporated offers 52,900 units in stock.

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