MIC39150-1.8WT Equivalent & Substitute Parts

Part Overview

The MIC39150-1.8WT is a linear voltage regulator IC manufactured by Microchip Technology, designed to deliver a fixed 1.8V output at 1.5A in a TO-220-3 package. This active product operates across an industrial temperature range of -40°C to 125°C and includes integrated protection features for over-current, over-temperature, and reverse polarity conditions. The device is ROHS3 compliant and maintains unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the primary component experiences supply constraints, extended lead times, or when design flexibility permits selection from qualified alternatives that meet the same electrical and mechanical requirements.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	1.8V
Output Current	1.5A
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.5V @ 1.5A
Package / Case	TO-220-3
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MIC39150-1.8WT is determined by the following critical parameters:

Fixed output voltage of 1.8V
TO-220-3 package configuration for mechanical and thermal compatibility
Positive output configuration
Single regulator topology
Active product status with current manufacturing support
ROHS3 compliance and REACH unaffected status

The substitute parts TLV2217-18KCS and TLV2217-18KCSE3 (both Texas Instruments) satisfy the package, voltage output, and compliance requirements. However, these substitutes operate at reduced output current (500mA versus 1.5A) and lower maximum input voltage (12V versus 16V). Substitution is valid only for applications where the lower current rating and input voltage specification do not exceed design requirements.

Parameter Comparison

Parameter	MIC39150-1.8WT	TLV2217-18KCS	TLV2217-18KCSE3
Manufacturer	Microchip Technology	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	1.8V	1.8V	1.8V
Output Current	1.5A	500mA	500mA
Input Voltage (Max)	16V	12V	12V
Package / Case	TO-220-3	TO-220-3	TO-220-3
Operating Temperature Range	-40°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Over Voltage	Over Current, Over Temperature, Over Voltage
PSRR	Not specified	62dB (120Hz)	62dB (120Hz)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Selection between the MIC39150-1.8WT and its substitutes must account for the following factors:

Current Capacity: The MIC39150-1.8WT delivers 1.5A output current, while both TLV2217 variants are limited to 500mA. Substitution is valid only when circuit load requirements do not exceed 500mA.

Input Voltage Range: The MIC39150-1.8WT accepts input voltages up to 16V, whereas TLV2217 devices are rated to 12V maximum. Substitution requires confirmation that input supply voltage remains within 12V specification.

Operating Temperature: The MIC39150-1.8WT operates from -40°C to 125°C, while TLV2217 variants operate from 0°C to 125°C. Applications requiring sub-zero operation must retain the MIC39150-1.8WT.

Regulatory Compliance: All three devices maintain ROHS3 compliance and REACH unaffected status, satisfying equivalent regulatory requirements.

Product Status: All devices are active products with current manufacturing support and documented inventory availability.

Frequently Asked Questions (FAQ)

Q: Can TLV2217-18KCS and TLV2217-18KCSE3 be used interchangeably with MIC39150-1.8WT?

A: Interchangeability is conditional. Both TLV2217 variants share identical electrical specifications (1.8V output, 500mA current, 12V max input) and package configuration (TO-220-3). The primary difference is packaging format: TLV2217-18KCS is supplied in tube packaging, while TLV2217-18KCSE3 includes tape-and-reel configuration. Selection depends on whether your application load current does not exceed 500mA and input voltage remains below 12V.

Q: What are the key differences between MIC39150-1.8WT and TLV2217 substitutes?

A: The MIC39150-1.8WT provides higher output current (1.5A versus 500mA), higher maximum input voltage (16V versus 12V), and extended low-temperature operation (-40°C versus 0°C minimum). The TLV2217 variants offer higher PSRR specification (62dB at 120Hz) and include over-voltage protection. Protection feature sets differ: MIC39150-1.8WT includes reverse polarity protection, while TLV2217 devices include over-voltage protection.

Q: Are there any thermal or mounting considerations when substituting these parts?

A: All three devices use identical TO-220-3 package configuration, ensuring mechanical compatibility on PCB layouts and with existing heatsink mounting solutions. Thermal performance may differ due to output current rating differences; applications operating at maximum current should evaluate thermal dissipation requirements for the selected device.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. The MIC39150-1.8WT, TLV2217-18KCS, and TLV2217-18KCSE3 all maintain ROHS3 compliance and REACH unaffected status. All devices carry EAR99 export classification and identical HTSUS commodity codes (8542.39.0001).

Q: What is the difference between TLV2217-18KCS and TLV2217-18KCSE3?

A: Both devices are electrically identical with matching specifications. The distinction is packaging format: TLV2217-18KCS is supplied in tube packaging, while TLV2217-18KCSE3 is supplied in tape-and-reel format. Selection depends on assembly process requirements and inventory management preferences.

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