BA033LBSG2-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The BA033LBSG2-TR is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to deliver a fixed 3.3V output at 150mA. This positive fixed output regulator operates across an input voltage range up to 7V with a maximum dropout voltage of 0.15V at 50mA. The device is housed in an SMP5 package (SC-74A, SOT-753) and is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this power management application.

Key Parameters

Parameter	BA033LBSG2-TR
Manufacturer	Rohm Semiconductor
Output Voltage (Fixed)	3.3V
Output Current	150mA
Input Voltage (Max)	7V
Dropout Voltage (Max)	0.15V @ 50mA
Quiescent Current (Iq)	15 µA
PSRR	66dB ~ 58dB (400Hz)
Package / Case	SC-74A, SOT-753 (SMP5)
Operating Temperature	-40°C ~ 85°C
Protection Features	Over Current, Over Temperature
Control Features	Enable
RoHS Status	RoHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the BA033LBSG2-TR are grouped based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Fixed output voltage of 3.3V
Output current capability of 150mA or greater
Surface mount packaging compatible with SC-74A / SOT-753 footprint
Operating temperature range minimum of -40°C
Enable control feature
Over Current and Over Temperature protection
RoHS3 compliance and Active product status

Secondary Compatibility Factors:

Input voltage rating (minimum 7V tolerance)
Dropout voltage performance
Quiescent current characteristics
PSRR performance at relevant frequencies

Substitutes are organized into two categories: direct current-matched alternatives (150mA output) and higher-current alternatives (250mA to 300mA output) suitable for applications with current margin requirements.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Iq (µA)	Package	Temp Range	RoHS Status
BA033LBSG2-TR	Rohm Semiconductor	3.3V	150mA	7V	0.15V @ 50mA	15	SMP5 (SOT-753)	-40°C ~ 85°C	RoHS3
TC1185-3.3VCT713	Microchip Technology	3.3V	150mA	6V	0.4V @ 150mA	80	SOT-23-5	-40°C ~ 125°C	RoHS3
TPS73433DDCR	Texas Instruments	3.3V	250mA	6.5V	0.22V @ 250mA	65	TSOT-23-5	-40°C ~ 125°C	RoHS3
MIC5318-3.3YD5-TR	Microchip Technology	3.3V	300mA	6V	0.2V @ 300mA	150	TSOT-23-5	-40°C ~ 125°C	RoHS3
LT1761ES5-3.3#TRPBF	Analog Devices Inc.	3.3V	100mA	20V	0.45V @ 100mA	N/A	TSOT-23-5	-40°C ~ 125°C	RoHS3
TC1015-3.3VCT713	Microchip Technology	3.3V	100mA	6V	0.25V @ 100mA	80	SOT-23-5	-40°C ~ 125°C	RoHS3
TC1014-3.3VCT713	Microchip Technology	3.3V	50mA	6V	0.12V @ 50mA	80	SOT-23-5	-40°C ~ 125°C	RoHS3
LP2982IM5-3.3/NOPB	Texas Instruments	3.3V	50mA	16V	0.33V @ 80mA	95	SOT-23-5	-40°C ~ 125°C	RoHS3

Engineering Selection Recommendations

Direct Current Match (150mA Output): The TC1185-3.3VCT713 from Microchip Technology provides equivalent 150mA output current with identical 3.3V fixed output voltage. Both devices feature Enable control and Over Current/Over Temperature protection. The TC1185 operates across -40°C to 125°C, exceeding the BA033LBSG2-TR temperature range. Both are RoHS3 compliant and Active status products. The primary electrical difference is dropout voltage (0.4V vs. 0.15V at rated current), which may impact applications with tight input voltage margins below 6.5V.

Higher Current Alternatives (250mA to 300mA Output): The TPS73433DDCR (250mA) and MIC5318-3.3YD5-TR (300mA) provide increased output current capacity while maintaining 3.3V fixed output. Both devices include Enable control and comprehensive protection features. The TPS73433DDCR offers superior dropout voltage performance (0.22V @ 250mA) compared to the main part. The MIC5318 delivers the highest current capacity (300mA) with excellent dropout characteristics (0.2V @ 300mA). Both are RoHS3 compliant and Active status. These alternatives are suitable for applications requiring current margin or future design scaling.

Lower Current Alternatives (50mA to 100mA Output): The TC1014-3.3VCT713 (50mA), TC1015-3.3VCT713 (100mA), and LP2982IM5-3.3/NOPB (50mA) are suitable only for applications where output current requirements do not exceed their rated values. These parts maintain 3.3V fixed output with Enable control and protection features. All are RoHS3 compliant and Active status. The LP2982 series accepts higher input voltages (16V maximum) compared to the BA033LBSG2-TR (7V maximum), providing flexibility in input supply design.

All identified substitutes maintain Active product status and RoHS3 compliance, ensuring long-term availability and regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can the TC1185-3.3VCT713 directly replace the BA033LBSG2-TR in all applications?

A: The TC1185-3.3VCT713 provides equivalent 150mA output current and 3.3V fixed voltage with identical control and protection features. Both use compatible SOT-23-5 packaging. The primary difference is dropout voltage: TC1185 exhibits 0.4V dropout at 150mA versus 0.15V for the BA033LBSG2-TR. Direct replacement is valid for applications where input voltage remains above 6.5V. Applications with input voltages between 6.5V and 7V may experience reduced output voltage stability with the TC1185.

Q: What is the advantage of using higher-current alternatives like the MIC5318-3.3YD5-TR?

A: The MIC5318-3.3YD5-TR provides 300mA output current capacity, double the BA033LBSG2-TR specification. This allows designs to operate with greater current margin, reducing thermal stress on the regulator and improving long-term reliability. The MIC5318 also exhibits superior dropout voltage (0.2V @ 300mA), enabling operation with lower input voltages. Higher-current alternatives are beneficial for designs with uncertain load requirements or future current scaling.

Q: Are the lower-current alternatives (50mA, 100mA) suitable substitutes?

A: Lower-current alternatives are suitable only when application load current does not exceed their rated output. The TC1014 (50mA) and TC1015 (100mA) are not direct replacements for the 150mA BA033LBSG2-TR. These parts are appropriate for redesigned circuits with reduced current requirements or as cost-optimized selections for applications with confirmed lower current demands.

Q: What packaging considerations apply to these substitutes?

A: All identified substitutes use SOT-23-5 or TSOT-23-5 surface mount packages, which are mechanically compatible with the BA033LBSG2-TR SMP5 package (SC-74A, SOT-753). PCB footprints are identical, allowing direct board-level substitution without layout modifications. Verify solder reflow profiles match your manufacturing process specifications.

Q: Do all substitutes maintain the same operating temperature range?

A: The BA033LBSG2-TR operates from -40°C to 85°C. Most identified substitutes extend the upper temperature limit to 125°C, providing enhanced thermal margin. Applications operating near 85°C may benefit from substitutes with 125°C ratings. Verify your specific application temperature requirements before selection.

Q: Are all substitutes RoHS3 compliant?

A: All identified substitutes are RoHS3 compliant and carry Active product status, matching the regulatory and availability profile of the BA033LBSG2-TR. This ensures compatibility with current procurement and environmental compliance requirements.

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