BA05FP-E2 Linear Voltage Regulator: Equivalent & Substitute Parts

Part Overview

The BA05FP-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, delivering a fixed positive 5V output at 1A. This surface-mount device in TO-252-3 (DPAK) packaging provides regulated power supply functionality with integrated over-current, over-temperature, and over-voltage protection. The part is classified as "Not For New Designs," making identification of active equivalent and substitute components essential for ongoing production support and design updates.

Key Parameters

Parameter	Value
Manufacturer Part Number	BA05FP-E2
Manufacturer	Rohm Semiconductor
Output Voltage (Fixed)	5V
Output Current	1A
Input Voltage (Max)	25V
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature, Over Voltage
RoHS Status	ROHS3 Compliant
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the BA05FP-E2 is determined by the following critical parameters:

Output Voltage: Must be fixed at 5V
Output Configuration: Must be positive
Package Type: Must be TO-252-3 (DPAK) for mechanical and thermal compatibility
Mounting Type: Must be surface mount
Output Current Capability: Minimum 1A required; higher ratings are acceptable
Input Voltage Range: Must accommodate up to 25V input
Protection Features: Over-current and over-temperature protection required
RoHS Compliance: ROHS3 Compliant status required

Substitute parts are grouped into two categories based on output current capacity and product status:

Category A - Full 1A Output Capacity (Active Status): AS7805ADTR-E1 from Diodes Incorporated. This part maintains the 1A output specification with active product status and enhanced PSRR performance.

Category B - Reduced Output Current (100mA - 500mA): LP2950 series (onsemi, National Semiconductor) and LF50ABDT-TRY (STMicroelectronics). These parts provide lower current outputs suitable for applications with reduced power requirements. LP2950 variants are active products; LF50ABDT-TRY is obsolete.

Category C - Intermediate Current (150mA - 1.5A): LD29150DT50R (STMicroelectronics, 1.5A) and TL750L05CKVURG3 (Texas Instruments, 150mA). These parts bridge the gap between full 1A and reduced-current applications.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	PSRR (120Hz)	Operating Temp Range	Product Status	Packaging
BA05FP-E2	Rohm Semiconductor	1A	25V	—	2.5 mA	55dB	-40°C ~ 85°C	Not For New Designs	Cut Tape (CT) & Digi-Reel®
AS7805ADTR-E1	Diodes Incorporated	1A	25V	2V @ 1A (Typ)	6 mA	70dB	-40°C ~ 125°C	Active	Tape & Reel (TR)
LD29150DT50R	STMicroelectronics	1.5A	14V	0.7V @ 1.5A	180 µA	64dB	-40°C ~ 125°C	Active	Cut Tape (CT) & Digi-Reel®
LF50ABDT-TRY	STMicroelectronics	500mA	16V	1.3V @ 500mA	2 mA	76dB ~ 60dB (120Hz ~ 10kHz)	-40°C ~ 125°C	Obsolete	Cut Tape (CT)
LP2950ACDT-5.0G	onsemi	100mA	30V	0.45V @ 100mA	120 µA	—	-40°C ~ 125°C	Active	Tube
LP2950ACDT-5RKG	onsemi	100mA	30V	0.45V @ 100mA	120 µA	—	-40°C ~ 125°C	Active	Cut Tape (CT) & Digi-Reel®
LP2950CDT-5.0/NOPB	National Semiconductor	100mA	30V	0.6V @ 100mA	120 µA	—	-40°C ~ 125°C	Active	—
LP2950CDT-5.0G	onsemi	100mA	30V	0.45V @ 100mA	120 µA	—	-40°C ~ 125°C	Active	Tube
LP2950CDT-5.0RKG	onsemi	100mA	30V	0.45V @ 100mA	120 µA	—	-40°C ~ 125°C	Active	Cut Tape (CT) & Digi-Reel®
LP2950CDTX-5.0/NOPB	National Semiconductor	100mA	30V	0.6V @ 100mA	120 µA	—	-40°C ~ 125°C	Active	—
TL750L05CKVURG3	Texas Instruments	150mA	26V	0.6V @ 150mA	2 mA	65dB	0°C ~ 125°C	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct 1A Replacement (Active Product Status)

AS7805ADTR-E1 from Diodes Incorporated is the primary substitute for BA05FP-E2. This part maintains the 1A output current specification, operates across the required input voltage range (25V maximum), and holds active product status. The extended operating temperature range (-40°C ~ 125°C) exceeds the original specification. ROHS3 compliance and REACH unaffected status align with regulatory requirements. Packaging is Tape & Reel (TR), suitable for automated assembly.

For Higher Current Applications (1.5A)

LD29150DT50R from STMicroelectronics provides 1.5A output capacity in the same TO-252-3 package. This part is active and ROHS3 compliant. The reduced maximum input voltage (14V versus 25V) must be evaluated against circuit requirements. Lower quiescent current (180 µA) and improved dropout voltage (0.7V @ 1.5A) offer efficiency advantages in specific applications.

For Reduced Current Applications (100mA - 500mA)

LP2950 series variants (onsemi, National Semiconductor) deliver 100mA output with active product status and extended input voltage range (30V maximum). These parts are suitable for low-power auxiliary supply circuits. Multiple packaging options (Tube, Cut Tape & Digi-Reel®) are available. LF50ABDT-TRY provides 500mA output but carries obsolete product status and should not be selected for new applications.

For Intermediate Current (150mA)

TL750L05CKVURG3 from Texas Instruments offers 150mA output with active status and enhanced protection features (reverse polarity protection included). Operating temperature range begins at 0°C (versus -40°C for other options), which may limit use in extreme cold environments.

Frequently Asked Questions (FAQ)

Q: Can AS7805ADTR-E1 directly replace BA05FP-E2 in existing designs?

A: Yes. Both parts deliver 5V fixed output at 1A in TO-252-3 packaging. Electrical parameters align within acceptable tolerances. Verify PCB layout accommodates Tape & Reel packaging if the original design used Cut Tape & Digi-Reel® format.

Q: What is the difference between LP2950 variants from onsemi and National Semiconductor?

A: Both deliver 100mA output at 5V in TO-252-3 packaging with identical protection features. National Semiconductor variants (LP2950CDT-5.0/NOPB, LP2950CDTX-5.0/NOPB) specify 0.6V dropout voltage at 100mA; onsemi variants specify 0.45V. Quiescent current is 120 µA for all variants. Selection depends on available inventory and packaging preference (Tube versus Cut Tape & Digi-Reel®).

Q: Is LD29150DT50R suitable for applications requiring 25V input?

A: No. LD29150DT50R maximum input voltage is 14V. Applications requiring 25V input must use AS7805ADTR-E1, BA05FP-E2, or LP2950 series (30V maximum input).

Q: Why is LF50ABDT-TRY listed if it is obsolete?

A: LF50ABDT-TRY is documented as an existing substitute in the BA05FP-E2 cross-reference data. Obsolete status indicates it should not be selected for new designs. Active alternatives with equivalent or superior specifications are available.

Q: What packaging considerations apply when substituting BA05FP-E2?

A: All substitute parts use TO-252-3 (DPAK) package with identical pin configuration and thermal characteristics. Packaging format differences (Cut Tape & Digi-Reel® versus Tube versus Tape & Reel) affect supply chain and assembly processes but not electrical compatibility or PCB layout.

Q: Does operating temperature range affect substitution suitability?

A: BA05FP-E2 operates -40°C ~ 85°C. Most substitutes extend this to -40°C ~ 125°C, providing broader environmental capability. TL750L05CKVURG3 operates 0°C ~ 125°C, which may be limiting for applications requiring -40°C operation. Verify application temperature requirements before selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, meeting regulatory requirements equivalent to BA05FP-E2.

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