BA033SFP-E2 Equivalent & Substitute Parts

Part Overview

The BA033SFP-E2 is a linear voltage regulator IC manufactured by ROHM Semiconductor, delivering a fixed 3.3V output at 1A in a TO-252-5 surface mount package. This device is classified as Not For New Designs, indicating it has been superseded in ROHM's product portfolio. Finding equivalent or substitute parts is necessary for ongoing production support, legacy system maintenance, and design flexibility when the primary part becomes unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value
Manufacturer Part Number	BA033SFP-E2
Manufacturer	ROHM Semiconductor
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	1A
Input Voltage (Max)	25V
Package / Case	TO-252-5, DPAK (4 Leads + Tab)
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 eligibility for the BA033SFP-E2 is determined by the following critical parameters:

Fixed output voltage of 3.3V
Output current capability of 1A minimum
TO-252-5 package compatibility (surface mount, DPAK form factor)
Positive output configuration
Enable control feature
Over current and over temperature protection as minimum protection requirements
RoHS3 compliance

The substitute parts identified below meet these core electrical and mechanical criteria, allowing direct replacement in applications where the BA033SFP-E2 is currently deployed.

Parameter Comparison

Parameter	BA033SFP-E2 (Main)	BD33FC0WFP-E2	LDF33PT-TR
Manufacturer	ROHM Semiconductor	ROHM Semiconductor	STMicroelectronics
Output Voltage (Fixed)	3.3V	3.3V	3.3V
Output Current	1A	1A	1A
Input Voltage (Max)	25V	26.5V	16V
Voltage Dropout (Max)	Not specified	0.7V @ 500mA	0.5V @ 1A
Quiescent Current (Iq)	5 mA	2.5 mA	800 µA
PSRR	55dB (120Hz)	Not specified	60dB ~ 45dB (120Hz ~ 100kHz)
Package / Case	TO-252-5, DPAK	TO-252-5, DPAK	TO-252-5, DPAK
Operating Temperature Range	-40°C ~ 85°C	-25°C ~ 85°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Over Voltage	Over Current, Over Temperature	Over Current, Over Temperature, UVLO
Product Status	Not For New Designs	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

BD33FC0WFP-E2 is the primary recommended substitute. It is manufactured by ROHM Semiconductor with Active product status, ensuring ongoing availability and support. It maintains identical output voltage and current specifications, shares the same TO-252-5 package, and exceeds the input voltage rating of the BA033SFP-E2 (26.5V vs. 25V). The BD33FC0WFP-E2 offers improved quiescent current performance (2.5 mA vs. 5 mA) and lower dropout voltage, making it suitable for direct replacement in new production runs and legacy system maintenance.

LDF33PT-TR by STMicroelectronics is an alternative substitute with identical output specifications and TO-252-5 package compatibility. However, it carries Obsolete product status, limiting its long-term availability. The LDF33PT-TR provides superior quiescent current (800 µA) and extended operating temperature range (-40°C ~ 125°C), but its lower maximum input voltage (16V) restricts its use to applications with input supplies not exceeding 16V. This part is suitable only for legacy system support where existing inventory is available.

Both substitute parts maintain RoHS3 compliance and surface mount compatibility with the original BA033SFP-E2 design.

Frequently Asked Questions (FAQ)

Q: Can BD33FC0WFP-E2 be used as a direct replacement for BA033SFP-E2?

A: Yes. Both parts deliver 3.3V at 1A output, use identical TO-252-5 packaging, and share the same pinout. The BD33FC0WFP-E2 is electrically compatible and offers improved performance characteristics. No PCB modifications are required.

Q: What is the key difference between BD33FC0WFP-E2 and LDF33PT-TR?

A: Both are functionally equivalent at 3.3V, 1A output in TO-252-5 packages. The primary differences are manufacturer (ROHM vs. STMicroelectronics), product status (Active vs. Obsolete), maximum input voltage (26.5V vs. 16V), and quiescent current (2.5 mA vs. 800 µA). BD33FC0WFP-E2 is recommended for new designs due to its Active status.

Q: Why is the BA033SFP-E2 marked as Not For New Designs?

A: This designation indicates ROHM has superseded this part in their product portfolio. While existing inventory remains available, the manufacturer recommends using newer alternatives like BD33FC0WFP-E2 for new development to ensure long-term supply continuity.

Q: Are all three parts RoHS3 compliant?

A: Yes. BA033SFP-E2, BD33FC0WFP-E2, and LDF33PT-TR are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the operating temperature limitation for LDF33PT-TR?

A: LDF33PT-TR operates from -40°C to 125°C, exceeding the BA033SFP-E2 range of -40°C to 85°C. However, its maximum input voltage is limited to 16V, making it unsuitable for applications requiring higher input supplies.

Q: Can I use these parts interchangeably in existing designs?

A: Yes, provided your application input voltage does not exceed 16V (for LDF33PT-TR) or 26.5V (for BD33FC0WFP-E2). All three parts share identical pinout and TO-252-5 package geometry. Verify your specific application requirements before substitution.

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