MIC39301-2.5WU-TR Equivalent & Substitute Parts

Part Overview

The MIC39301-2.5WU-TR is a linear voltage regulator IC from Microchip Technology, delivering a fixed 2.5V output at 3A in a TO-263-5 surface mount package. This device is classified as Active product status and is designed for applications requiring stable, regulated power delivery with integrated protection features including over-current, over-temperature, and reverse polarity protection.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter ranges. The following parts meet the substitution criteria for this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	3A
Input Voltage (Max)	16V
Dropout Voltage @ 3A	0.55V
Package Type	TO-263-5 (D2PAK)
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic is based on the following critical parameters:

Fixed output voltage of 2.5V
Package compatibility: TO-263-5 (D2PAK with 5 leads plus tab)
Surface mount mounting type
Operating temperature range: -40°C to 125°C
Enable control feature
RoHS3 compliance

Substitute parts are grouped into two categories based on output current capability:

Category A: 3A Output Current — Direct substitutes maintaining full 3A output capacity Category B: 1.5A Output Current — Reduced current capacity substitutes for lower-power applications

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Dropout Voltage	Package	RoHS Status
MIC39301-2.5WU-TR	Microchip Technology	3A	16V	0.55V @ 3A	TO-263-5	ROHS3
LP3853ES-2.5/NOPB	Texas Instruments	3A	7V	0.6V @ 3A	TO-263-5	ROHS3
LP3853ESX-2.5/NOPB	National Semiconductor	3A	7V	0.6V @ 3A	TO-263-5	ROHS3
LT1764AEQ-2.5#PBF	Analog Devices Inc.	3A	20V	0.66V @ 3A	DDPAK-5	ROHS3
LT1764AEQ-2.5#TRPBF	Analog Devices Inc.	3A	20V	0.66V @ 3A	DDPAK-5	ROHS3
LT1764EQ-2.5#TRPBF	Analog Devices Inc.	3A	20V	0.66V @ 3A	DDPAK-5	ROHS3
LP3965ES-2.5/NOPB	Texas Instruments	1.5A	7V	0.55V @ 1.5A	TO-263-5	ROHS3
LP3965ESX-2.5/NOPB	Texas Instruments	1.5A	7V	0.55V @ 1.5A	TO-263-5	ROHS3
LT1963AEQ-2.5#PBF	Analog Devices Inc.	1.5A	20V	0.55V @ 1.5A	DDPAK-5	ROHS3
LT1963AEQ-2.5#TRPBF	Analog Devices Inc.	1.5A	20V	0.55V @ 1.5A	DDPAK-5	ROHS3

Engineering Selection Recommendations

For 3A Applications (Direct Substitutes):

LP3853ES-2.5/NOPB and LP3853ESX-2.5/NOPB maintain 3A output current with identical TO-263-5 package compatibility. These parts are Active status and ROHS3 compliant. Input voltage maximum is reduced to 7V compared to the MIC39301-2.5WU-TR at 16V; verify input supply does not exceed 7V before selection.

LT1764AEQ-2.5#PBF, LT1764AEQ-2.5#TRPBF, and LT1764EQ-2.5#TRPBF from Analog Devices maintain 3A output with higher input voltage tolerance (20V maximum). These parts are Active status and ROHS3 compliant. Packaging is DDPAK-5, mechanically compatible with TO-263-5. Moisture sensitivity level is 1 (Unlimited) versus level 3 for the main part.

For 1.5A Applications (Reduced Current Substitutes):

LP3965ES-2.5/NOPB and LP3965ESX-2.5/NOPB provide 1.5A output in TO-263-5 package. Both are Active status and ROHS3 compliant. Input voltage maximum is 7V. These parts are suitable only for applications requiring 1.5A or less.

LT1963AEQ-2.5#PBF and LT1963AEQ-2.5#TRPBF from Analog Devices provide 1.5A output with 20V input voltage tolerance. Both are Active status and ROHS3 compliant. Packaging is DDPAK-5. Moisture sensitivity level is 1 (Unlimited).

All substitute parts maintain the required 2.5V fixed output voltage, Enable control feature, and operating temperature range of -40°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can LP3965ES-2.5/NOPB replace MIC39301-2.5WU-TR in a 3A application?

A: No. LP3965ES-2.5/NOPB is rated for 1.5A maximum output current. It is suitable only for applications requiring 1.5A or less. For 3A applications, use LP3853ES-2.5/NOPB, LP3853ESX-2.5/NOPB, or the LT1764 series.

Q: What is the difference between LP3853ES-2.5/NOPB and LP3853ESX-2.5/NOPB?

A: Both parts are electrically identical with 3A output, 2.5V fixed output, and TO-263-5 package. The primary difference is packaging format: LP3853ES-2.5/NOPB is supplied in Tube, while LP3853ESX-2.5/NOPB is supplied in Bulk.

Q: Can I use LT1764AEQ-2.5#PBF if my input voltage is 16V?

A: Yes. LT1764AEQ-2.5#PBF has a maximum input voltage rating of 20V, which exceeds the 16V requirement. This part is suitable for your application.

Q: Are the LT1764 and LT1963 series pin-compatible with MIC39301-2.5WU-TR?

A: Both use DDPAK-5 packaging, which is mechanically compatible with TO-263-5. Pin configuration must be verified against device datasheets before board-level substitution.

Q: What is the significance of Moisture Sensitivity Level (MSL)?

A: MSL indicates the maximum time a component can be exposed to moisture before soldering. MIC39301-2.5WU-TR has MSL 3 (168 hours). LT1764 and LT1963 series have MSL 1 (Unlimited), providing greater handling flexibility. LP3853 and LP3965 series have MSL 3, matching the main part.

Q: Which substitute has the lowest dropout voltage?

A: MIC39301-2.5WU-TR and LP3965 series both specify 0.55V dropout at their respective rated currents. LP3853 series specifies 0.6V at 3A. LT1764 series specifies 0.66V at 3A.

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