UC282T-2 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The UC282T-2 is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed output applications. This device delivers 3A output current in a TO-220-5 package configuration and operates across an input voltage range up to 7.5V with a fixed output of 2.1V. The UC282T-2 is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Package / Case	TO-220-5
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Fixed)	2.1V
Voltage - Input (Max)	7.5V
Current - Output	3A
Voltage Dropout (Max)	2.2V @ 3A
Protection Features	Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature	-40°C ~ 100°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UC282T-2 is determined by the following critical parameters:

Package Compatibility: TO-220-5 through-hole mounting
Output Current Rating: 3A minimum
Maximum Input Voltage: 7.5V or greater
Voltage Dropout: 2.2V @ 3A or lower
Protection Features: Over temperature, reverse polarity, and short circuit protection
Operating Temperature Range: -40°C to 100°C minimum
Regulatory Compliance: ROHS3 compliant

The UC282T-ADJ qualifies as a manufacturer-recommended substitute. While it features an adjustable output type (1.2V to 6V range) compared to the fixed 2.1V output of the UC282T-2, it maintains identical electrical performance specifications across all critical parameters: 3A output current, 7.5V maximum input voltage, 2.2V dropout voltage, identical protection features, and matching thermal operating range. The adjustable output capability of the UC282T-ADJ provides additional design flexibility while preserving full compatibility with UC282T-2 applications requiring 2.1V output through appropriate external resistor configuration.

Parameter Comparison

Parameter	UC282T-2 (Main Part)	UC282T-ADJ (Substitute)
Manufacturer	Texas Instruments	Texas Instruments
Package / Case	TO-220-5	TO-220-5
Output Configuration	Positive	Positive
Output Type	Fixed (2.1V)	Adjustable (1.2V - 6V)
Voltage - Input (Max)	7.5V	7.5V
Current - Output	3A	3A
Voltage Dropout (Max)	2.2V @ 3A	2.2V @ 3A
Protection Features	Over Temperature, Reverse Polarity, Short Circuit	Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature	-40°C ~ 100°C	-40°C ~ 100°C
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The UC282T-ADJ is the manufacturer-recommended substitute for the obsolete UC282T-2. Both components maintain identical electrical performance across all critical parameters including output current, input voltage rating, dropout voltage, and protection features. The UC282T-ADJ carries active product status, ensuring continued availability and supply chain support. Both parts maintain ROHS3 compliance and identical regulatory certifications (REACH Unaffected, ECCN EAR99, HTSUS 8542.39.0001).

The primary distinction between these components is the output voltage configuration. The UC282T-2 provides a fixed 2.1V output, while the UC282T-ADJ offers adjustable output from 1.2V to 6V. For applications requiring the 2.1V fixed output of the original UC282T-2, the UC282T-ADJ can be configured to deliver this voltage through external resistor network design, maintaining full functional equivalence while providing the advantage of an active, currently manufactured component.

Frequently Asked Questions (FAQ)

Q: Can the UC282T-ADJ directly replace the UC282T-2 without circuit modifications?

A: The UC282T-ADJ shares identical electrical performance specifications and TO-220-5 package configuration with the UC282T-2. However, the UC282T-ADJ requires external resistor configuration to set the 2.1V output voltage, whereas the UC282T-2 provides fixed 2.1V output without external components. Direct pin-for-pin substitution is not possible; circuit design modifications are necessary.

Q: What are the key compatibility factors for substitution?

A: Substitution compatibility is determined by: TO-220-5 package matching, 3A output current capability, 7.5V maximum input voltage rating, 2.2V maximum dropout voltage at 3A, identical protection features (over temperature, reverse polarity, short circuit), and -40°C to 100°C operating temperature range.

Q: Why is the UC282T-2 classified as obsolete?

A: The UC282T-2 is no longer in active production. The UC282T-ADJ represents the current Texas Instruments solution for this product category, offering enhanced design flexibility through adjustable output voltage while maintaining all electrical performance characteristics.

Q: Are there any regulatory or compliance differences between these parts?

A: Both the UC282T-2 and UC282T-ADJ maintain identical regulatory status: ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. No compliance differences exist between these components.

Q: What inventory considerations apply to these parts?

A: The UC282T-2 is obsolete with limited remaining inventory. The UC282T-ADJ is an active product with current manufacturing support and established supply chain availability, making it the preferred choice for new designs and ongoing system support.

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