BA032LBSG2-TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The BA032LBSG2-TR is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed to deliver a fixed 3.2V output at 150mA. This device operates as a positive fixed output regulator with integrated enable control and protection features including over-current and over-temperature monitoring. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the 3.2V output specification while accommodating variations in output current capacity, input voltage ratings, and package configurations.

Key Parameters

Parameter	BA032LBSG2-TR
Manufacturer	Rohm Semiconductor
Output Voltage (Fixed)	3.2V
Output Current	150mA
Input Voltage (Max)	7V
Dropout Voltage (Max)	0.15V @ 50mA
Quiescent Current	15 µA
Operating Temperature	-40°C ~ 85°C
Package	SC-74A, SOT-753 (SMP5)
Control Features	Enable
Protection Features	Over Current, Over Temperature
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the BA032LBSG2-TR are selected based on the following critical parameters:

Output Voltage Compatibility: Substitute parts must provide 3.2V fixed output or functionally equivalent voltage levels (3.15V, 3.3V) suitable for applications designed for 3.2V operation.

Output Current Capacity: The original part delivers 150mA. Substitutes with equal or greater current capacity (200mA, 250mA, 300mA) are acceptable for direct replacement without circuit modification.

Input Voltage Rating: Maximum input voltage must be sufficient for the application. The original part accepts up to 7V; substitutes rated at 5.5V to 6.5V remain compatible with typical supply voltages.

Package Configuration: The original uses SC-74A/SOT-753 (SMP5) packaging. Substitutes in SOT-23-5 or equivalent surface-mount packages maintain mechanical and electrical compatibility.

Control and Protection Features: Enable control and over-current/over-temperature protection are standard across all listed substitutes, ensuring functional equivalence.

Product Status: Active substitutes are preferred over obsolete parts to ensure long-term availability and supply chain stability.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Operating Temperature	Package	Product Status
BA032LBSG2-TR	Rohm Semiconductor	3.2V	150mA	7V	0.15V @ 50mA	15 µA	-40°C ~ 85°C	SC-74A, SOT-753	Obsolete
LDK130M32R	STMicroelectronics	3.2V	300mA	5.5V	0.4V @ 300mA	60 µA	-40°C ~ 125°C	SC-74A, SOT-753	Active
TPS73433DDCR	Texas Instruments	3.3V	250mA	6.5V	0.22V @ 250mA	65 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active
TPS73433DDCT	Texas Instruments	3.3V	250mA	6.5V	0.22V @ 250mA	65 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active
TPS73433TDDCRQ1	Texas Instruments	3.3V	250mA	6.5V	0.22V @ 250mA	65 µA	-40°C ~ 105°C	SOT-23-5 Thin	Active
TPS79930DDCR	Texas Instruments	3V	200mA	6.5V	0.18V @ 200mA	60 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active
TPS79930DDCT	Texas Instruments	3V	200mA	6.5V	0.18V @ 200mA	60 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active
TPS799315DDCR	Texas Instruments	3.15V	200mA	6.5V	0.18V @ 200mA	60 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active
TPS799315DDCT	Texas Instruments	3.15V	200mA	6.5V	0.18V @ 200mA	60 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active
TPS79933DDCR	Texas Instruments	3.3V	200mA	6.5V	0.16V @ 200mA	60 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active
TPS79933DDCT	Texas Instruments	3.3V	200mA	6.5V	0.16V @ 200mA	60 µA	-40°C ~ 125°C	SOT-23-5 Thin	Active

Engineering Selection Recommendations

Primary Substitute - Exact Voltage Match: LDK130M32R (STMicroelectronics) provides the closest functional equivalent with identical 3.2V output voltage, higher current capacity (300mA vs 150mA), and active product status. This part is suitable for direct replacement in applications where the original 150mA capacity is sufficient or where additional headroom is beneficial.

Secondary Substitutes - Voltage Tolerance Required: TPS73433 series (Texas Instruments) and TPS79933 series deliver 3.3V output, representing a 100mV increase from the original 3.2V specification. These parts are suitable only for applications with 3.3V tolerance or where the voltage differential is acceptable to the circuit design. All TPS73433 and TPS79933 variants are active products with extended temperature ranges (-40°C to 125°C) and improved dropout characteristics.

Tertiary Substitutes - Voltage Offset Consideration: TPS799315 series provides 3.15V output, representing a 50mV decrease from the original specification. TPS79930 series delivers 3V output, representing a 200mV decrease. These parts are suitable only for applications with explicit voltage tolerance specifications that accommodate the lower output levels.

Automotive-Grade Options: LDK130M32R carries automotive qualification (AEC-Q100), and TPS73433TDDCRQ1 includes automotive-grade designation with AEC-Q100 qualification. These variants are required for automotive applications.

Packaging Consideration: LDK130M32R maintains the original SC-74A/SOT-753 package footprint. All Texas Instruments substitutes use SOT-23-5 Thin packaging, requiring PCB layout modification if direct footprint compatibility is required.

Frequently Asked Questions (FAQ)

Q: Can LDK130M32R replace BA032LBSG2-TR directly? A: Yes. LDK130M32R provides identical 3.2V output voltage with higher current capacity (300mA). The package footprint is compatible (SC-74A/SOT-753). Electrical performance is equivalent for applications requiring 150mA or less.

Q: What is the voltage tolerance for TPS73433 and TPS79933 substitutes? A: TPS73433 series outputs 3.3V (100mV above original specification). TPS79933 series outputs 3.3V (100mV above original specification). These parts are suitable only for circuits designed to accept 3.3V or with documented voltage tolerance specifications.

Q: Are TPS799315 and TPS79930 suitable substitutes? A: TPS799315 outputs 3.15V (50mV below original). TPS79930 outputs 3V (200mV below original). These parts are suitable only for applications with explicit tolerance for lower output voltages or where the voltage differential does not affect circuit operation.

Q: What is the difference between DDCR and DDCT packaging variants? A: DDCR indicates Cut Tape (CT) & Digi-Reel packaging. DDCT indicates Tape & Reel (TR) packaging. Both are surface-mount configurations; the difference is in supply format and reel specifications, not electrical performance.

Q: Which substitute offers the best thermal performance? A: All active substitutes operate across -40°C to 125°C, extending the original -40°C to 85°C range. TPS73433TDDCRQ1 is limited to -40°C to 105°C due to automotive-grade specifications but includes AEC-Q100 qualification for automotive applications.

Q: Is PCB layout modification required for Texas Instruments substitutes? A: Yes. Texas Instruments substitutes use SOT-23-5 Thin packaging, while the original uses SC-74A/SOT-753. PCB footprint and layout must be modified accordingly. LDK130M32R maintains the original package footprint and requires no layout modification.

Q: What is the quiescent current difference between the original and substitutes? A: The original BA032LBSG2-TR draws 15 µA quiescent current. All listed substitutes draw 60 µA, representing a 4x increase. This difference is significant for battery-powered or ultra-low-power applications and must be evaluated against power budget requirements.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitutes carry RoHS3 compliance certification, matching the original part's compliance status.

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