TCR3RM12A,LF Linear Voltage Regulator IC

Part Overview

The TCR3RM12A,LF is a linear voltage regulator IC manufactured by Toshiba Semiconductor and Storage, designed for positive fixed 1.2V output applications with 300mA current capacity in a 4-DFNC surface mount package. This component is classified as obsolete, necessitating identification of active substitute parts to maintain design continuity and ensure long-term supply chain reliability. The part operates across an industrial temperature range of -40°C to 85°C and includes integrated over-current and over-temperature protection features.

Key Parameters

Parameter	Value
Manufacturer	Toshiba Semiconductor and Storage
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.2V
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
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TCR3RM12A,LF is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Output voltage: 1.2V fixed
Maximum output current: 300mA
Maximum input voltage: 5.5V
Output configuration: Positive
Protection features: Over Current and Over Temperature

Mechanical Equivalence Criteria:

Package type: 4-XDFN Exposed Pad
Mounting type: Surface Mount
Supplier device package: 4-DFNC (1x1)

Compliance Criteria:

RoHS3 compliance
Moisture Sensitivity Level: 1 (Unlimited)

The substitute part TCR3RM12A,LF(SE maintains identical electrical and mechanical specifications while offering active product status and improved supply availability. Both parts share the same base product number (TCR3RM12) and are manufactured by the same supplier.

Parameter Comparison

Parameter	TCR3RM12A,LF (Main Part)	TCR3RM12A,LF(SE (Substitute)
Manufacturer	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage
Product Status	Obsolete	Active
Packaging Type	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
Output Voltage (Fixed)	1.2V	1.2V
Input Voltage (Max)	5.5V	5.5V
Output Current	300mA	300mA
Voltage Dropout (Max)	0.13V @ 300mA	Not specified
PSRR	100dB (1kHz)	Not specified
Quiescent Current (Iq)	Not specified	12 µA
Control Features	Not specified	Current Limit, Enable
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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The TCR3RM12A,LF(SE is the direct substitute for the obsolete TCR3RM12A,LF. Both parts are manufactured by Toshiba Semiconductor and Storage and maintain identical electrical specifications for output voltage, output current, and input voltage ratings. Both components are ROHS3 compliant and carry MSL rating 1, ensuring compatibility with standard manufacturing and storage protocols.

The primary distinction is product status: the TCR3RM12A,LF(SE is active with significantly higher inventory availability (8770 pcs vs. 1107 pcs), making it the appropriate selection for new designs and ongoing production requirements. The packaging format differs (Tape & Reel vs. Cut Tape & Digi-Reel), which may affect procurement and assembly processes but does not impact electrical or mechanical compatibility.

The substitute part includes additional control features (Current Limit and Enable functions) and specifies quiescent current (12 µA), providing enhanced functionality and operational transparency compared to the main part specification.

Frequently Asked Questions (FAQ)

Q: Can TCR3RM12A,LF(SE be used as a direct replacement for TCR3RM12A,LF?

A: Yes. Both parts share identical output voltage (1.2V fixed), output current (300mA), input voltage rating (5.5V maximum), package type (4-XDFN Exposed Pad), and protection features (Over Current, Over Temperature). The electrical and mechanical specifications are equivalent.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) & Digi-Reel packaging is supplied in individual cut segments, while Tape & Reel (TR) packaging is supplied on continuous reel format. Both formats contain the same component; the difference is in delivery and handling method. Tape & Reel format typically offers better automation compatibility for high-volume assembly operations.

Q: Why is the main part listed as obsolete?

A: Product obsolescence indicates that the manufacturer has discontinued active production and support for the TCR3RM12A,LF. The substitute part TCR3RM12A,LF(SE remains in active production status, ensuring continued availability and manufacturer support.

Q: Are there any functional differences between the two parts?

A: The substitute part specifies additional control features (Current Limit and Enable) and provides quiescent current specification (12 µA). The main part does not document these parameters. Both parts maintain the same core voltage regulation function and protection mechanisms.

Q: Do both parts meet the same compliance standards?

A: Yes. Both TCR3RM12A,LF and TCR3RM12A,LF(SE are ROHS3 compliant and carry MSL rating 1 (Unlimited), meeting identical environmental and moisture sensitivity requirements.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 85°C, covering industrial temperature specifications.

Q: Can the parts be used interchangeably in existing designs?

A: Yes, provided the design accommodates the Tape & Reel packaging format of the substitute part. The electrical specifications, pin configuration, and package footprint are identical.

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