TCR3RM33A,LF Linear Voltage Regulator IC

Part Overview

The TCR3RM33A,LF is a linear voltage regulator IC manufactured by Toshiba Semiconductor and Storage, designed for positive fixed 3.3V output applications with 300mA current capacity. This device operates in a compact 4-DFNC (1x1) surface mount package and is classified as a Power Management (PMIC) component.

The TCR3RM33A,LF carries an Obsolete product status. Locating equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this regulator topology.

Key Parameters

Parameter	Value
Manufacturer	Toshiba Semiconductor and Storage
Category	Power Management (PMIC)
Series	TCR3RM
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	3.3V
Voltage - Input (Max)	5.5V
Current - Output	300mA
Voltage Dropout (Max)	0.13V @ 300mA
Package / Case	4-XDFN Exposed Pad
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TCR3RM33A,LF is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Output voltage: 3.3V fixed
Maximum output current: 300mA
Maximum input voltage: 5.5V
Package type: 4-XDFN Exposed Pad (4-DFNC 1x1)
Mounting type: Surface Mount
Operating temperature range: -40°C ~ 85°C
RoHS compliance: ROHS3 Compliant

Substitute parts must maintain identical output voltage, current capacity, input voltage rating, and physical package specifications. Variations in dropout voltage, quiescent current, or control features do not disqualify substitution when all primary electrical and mechanical parameters align.

Parameter Comparison

Parameter	TCR3RM33A,LF (Main Part)	TCR3RM33A,LF(SE (Substitute)
Manufacturer	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage
Series	TCR3RM	TCR3RM
Product Status	Obsolete	Active
Output Configuration	Positive	Positive
Output Type	Fixed	Fixed
Voltage - Output (Min/Fixed)	3.3V	3.3V
Voltage - Input (Max)	5.5V	5.5V
Current - Output	300mA	300mA
Voltage Dropout (Max)	0.13V @ 300mA	0.14V @ 300mA
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	4-XDFN Exposed Pad	4-XDFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The TCR3RM33A,LF(SE serves as a direct functional equivalent to the obsolete TCR3RM33A,LF. Both devices are manufactured by Toshiba Semiconductor and Storage within the same TCR3RM series and maintain identical electrical specifications for output voltage, current capacity, and input voltage rating.

The substitute part TCR3RM33A,LF(SE carries Active product status, ensuring ongoing availability and supply chain support. Both parts are ROHS3 Compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, indicating equivalent environmental handling requirements.

The TCR3RM33A,LF(SE includes additional control features (Current Limit and Enable functions) and quiescent current specification (12 µA) not documented in the main part. These additions do not prevent substitution and may provide enhanced functionality for applications requiring enable control or quiescent current monitoring.

The dropout voltage specification differs marginally (0.13V versus 0.14V @ 300mA), representing a 0.01V variance within typical linear regulator tolerance ranges and does not constitute a substitution barrier.

Frequently Asked Questions (FAQ)

Q: Can TCR3RM33A,LF(SE replace TCR3RM33A,LF in existing designs?

A: Yes. Both devices maintain identical output voltage (3.3V), output current (300mA), input voltage rating (5.5V maximum), and physical package specifications (4-XDFN Exposed Pad, Surface Mount). Electrical and mechanical compatibility is confirmed across all critical parameters.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The main part TCR3RM33A,LF is classified as Obsolete, indicating discontinued manufacturing. The substitute TCR3RM33A,LF(SE is Active, confirming current production and long-term supply availability. This status difference is the primary driver for substitution.

Q: Are there packaging differences between these parts?

A: Both parts use identical package specifications: 4-XDFN Exposed Pad with 4-DFNC (1x1) dimensions. The main difference is packaging format: TCR3RM33A,LF uses standard packaging, while TCR3RM33A,LF(SE is supplied in Tape & Reel (TR) format for automated assembly processes.

Q: Does the additional 0.01V dropout voltage variance affect circuit performance?

A: The dropout voltage difference (0.13V versus 0.14V @ 300mA) is within standard linear regulator manufacturing tolerances. This variance does not impact functional compatibility for applications designed to the TCR3RM33A,LF specifications.

Q: What additional features does TCR3RM33A,LF(SE provide?

A: The substitute part includes Current Limit and Enable control features, plus documented quiescent current specification (12 µA). These features enhance design flexibility for applications requiring output enable control or quiescent current monitoring. Designs not utilizing these features operate identically to the main part.

Q: Are both parts RoHS compliant?

A: Yes. Both TCR3RM33A,LF and TCR3RM33A,LF(SE are ROHS3 Compliant with MSL Level 1 (Unlimited) moisture sensitivity ratings, confirming equivalent environmental and regulatory compliance.

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