TCR3RM285A,LF Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The TCR3RM285A,LF is a linear voltage regulator IC manufactured by Toshiba Semiconductor and Storage, classified as a Power Management (PMIC) component. This device functions as a positive fixed output voltage regulator delivering 300mA at 2.85V with a maximum dropout voltage of 0.13V at full load current. The part is currently listed with obsolete product status, necessitating identification of active equivalent alternatives to maintain design continuity and ensure long-term supply availability for new production and field replacements.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.85V
Output Current	300mA
Input Voltage (Maximum)	5.5V
Dropout Voltage (Maximum)	0.13V @ 300mA
Output Configuration	Positive Fixed
Package Type	4-XDFN Exposed Pad
Operating Temperature Range	-40°C to 85°C
Protection Features	Over Current, Over Temperature
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TCR3RM285A,LF is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Fixed output voltage of 2.85V
Output current capability of 300mA minimum
Maximum input voltage of 5.5V or greater
Positive output configuration
Over current and over temperature protection features

Mechanical Equivalence Criteria:

4-XDFN Exposed Pad package footprint
Surface mount mounting type
Identical pinout and land pattern compatibility

Compliance Criteria:

ROHS3 compliance status
Operating temperature range of -40°C to 85°C minimum

The TCR3RM285A,LF(SE variant meets all substitution criteria while offering active product status and enhanced feature set including current limit and enable control functions.

Parameter Comparison

Parameter	TCR3RM285A,LF (Main Part)	TCR3RM285A,LF(SE (Substitute)
Manufacturer	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage
Series	TCR3RM	TCR3RM
Output Voltage (Fixed)	2.85V	2.85V
Output Current	300mA	300mA
Input Voltage (Maximum)	5.5V	5.5V
Dropout Voltage (Maximum)	0.13V @ 300mA	0.15V @ 300mA
Output Configuration	Positive Fixed	Positive Fixed
Number of Regulators	1	1
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature
Operating Temperature	-40°C to 85°C	-40°C to 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	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS Code	8542.39.0001	8542.39.0001
Product Status	Obsolete	Active
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)

Engineering Selection Recommendations

The TCR3RM285A,LF(SE is the direct functional equivalent for the obsolete TCR3RM285A,LF. Both devices share identical electrical specifications for output voltage, output current, input voltage rating, and protection features. The substitute part maintains full ROHS3 compliance and operates across the same temperature range.

The TCR3RM285A,LF(SE offers active product status with current availability of 10,040 pieces in stock, compared to the obsolete status of the original part. The dropout voltage specification increases marginally from 0.13V to 0.15V at 300mA, remaining within acceptable tolerance for most applications requiring 2.85V regulation at 300mA output current.

The substitute part includes additional control features (current limit and enable functions) not specified in the original part documentation, providing enhanced functionality without compromising backward compatibility. Both parts utilize identical 4-XDFN Exposed Pad packaging with surface mount configuration, ensuring direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TCR3RM285A,LF(SE be used as a direct replacement for the TCR3RM285A,LF?

A: Yes. Both parts deliver identical output voltage (2.85V) and output current (300mA) with matching input voltage ratings (5.5V maximum), operating temperature ranges (-40°C to 85°C), and package footprints (4-XDFN Exposed Pad). The dropout voltage difference of 0.02V (0.13V versus 0.15V) is negligible for most circuit applications.

Q: What is the primary difference between these two part numbers?

A: The TCR3RM285A,LF(SE is the active production variant with current availability, while the TCR3RM285A,LF is obsolete. The substitute includes current limit and enable control features. Packaging format differs: the original uses Cut Tape & Digi-Reel, while the substitute uses standard Tape & Reel format.

Q: Are there any PCB layout considerations when substituting this part?

A: No. Both parts use identical 4-XDFN Exposed Pad package geometry with surface mount configuration. PCB footprints, land patterns, and thermal pad dimensions are equivalent, requiring no layout modifications.

Q: Does the substitute part maintain the same compliance certifications?

A: Yes. The TCR3RM285A,LF(SE is ROHS3 compliant with identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Moisture sensitivity level remains at MSL 1 (Unlimited) for both parts.

Q: What is the quiescent current specification for the substitute part?

A: The TCR3RM285A,LF(SE specifies quiescent current (Iq) at 12 µA. This specification is not provided for the original TCR3RM285A,LF.

Q: Can I use the substitute part in new designs?

A: Yes. The TCR3RM285A,LF(SE is an active product with full production support and current inventory availability, making it suitable for new design implementations requiring a 2.85V, 300mA linear voltage regulator in 4-XDFN package format.

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