LP3964ES-3.3 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3964ES-3.3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output at 800mA in a TO-263 (DDPAK-5) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device provides regulated 3.3V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable low-voltage power delivery in compact form factors.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Output Current	800mA
Input Voltage (Max)	7V
Voltage Dropout (Max)	0.35V @ 800mA
Quiescent Current (Iq)	9 mA
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the LP3964ES-3.3 are classified based on electrical parameter compatibility and package equivalence. The primary substitution criteria are:

Critical Parameters for Substitution:

Output voltage: 3.3V fixed
Output current capability: 800mA
Package type: TO-263 (DDPAK-5) surface mount
Operating temperature range: -40°C ~ 125°C
Input voltage maximum: 6V to 7V range
Voltage dropout: ≤1.4V @ 800mA

Substitution Categories:

Direct Manufacturer Equivalent: LP3964ES-3.3/NOPB is the direct equivalent with identical electrical specifications and packaging. This part differs only in RoHS compliance status (ROHS3 Compliant vs. non-compliant) and packaging format (Tube).

Parametric Equivalents: LP3874ES-3.3/NOPB, LP3961ES-3.3/NOPB, and LP3871ES-3.3/NOPB meet all critical electrical parameters and package requirements. These parts maintain 3.3V output, 800mA current capability, TO-263 packaging, and identical operating temperature ranges. Variations exist in quiescent current (5 mA to 9 mA) and PSRR specifications where provided.

Manufacturer Recommended Alternative: TC1265-3.3VETTR from Microchip Technology is a cross-manufacturer substitute meeting core electrical requirements. This part operates within the same voltage and current specifications but exhibits higher voltage dropout (1.4V @ 800mA vs. 0.35V) and lower quiescent current (130 µA). Package equivalence is maintained in DDPAK-5 form factor.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Voltage Dropout @ 800mA	Quiescent Current	Package	Product Status	RoHS Status
LP3964ES-3.3	Texas Instruments	3.3V	800mA	7V	0.35V	9 mA	TO-263 (DDPAK-5)	Obsolete	Non-compliant
LP3964ES-3.3/NOPB	Texas Instruments	3.3V	800mA	7V	0.35V	9 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant
LP3874ES-3.3/NOPB	Texas Instruments	3.3V	800mA	7V	0.35V	9 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant
LP3961ES-3.3/NOPB	Texas Instruments	3.3V	800mA	7V	0.35V	9 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant
LP3871ES-3.3/NOPB	Texas Instruments	3.3V	800mA	7V	0.35V	5 mA	TO-263 (DDPAK-5)	Active	ROHS3 Compliant
TC1265-3.3VETTR	Microchip Technology	3.3V	800mA	6V	1.4V	130 µA	DDPAK-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement: LP3964ES-3.3/NOPB is the primary choice when seeking a direct equivalent. This part maintains identical electrical performance and package compatibility while offering active product status and ROHS3 compliance, addressing the obsolescence of the original LP3964ES-3.3.

For Active Production Designs: LP3874ES-3.3/NOPB, LP3961ES-3.3/NOPB, and LP3871ES-3.3/NOPB are all active Texas Instruments products meeting full electrical parameter requirements. LP3871ES-3.3/NOPB offers reduced quiescent current (5 mA) compared to the original specification (9 mA), providing potential power efficiency benefits in battery-powered applications. All three maintain ROHS3 compliance and identical voltage regulation characteristics.

For Cross-Manufacturer Substitution: TC1265-3.3VETTR from Microchip Technology provides an alternative when Texas Instruments parts are unavailable. This part maintains 3.3V output and 800mA current capability with DDPAK-5 packaging. The higher voltage dropout (1.4V vs. 0.35V) requires verification that input voltage headroom remains adequate for the application. The significantly lower quiescent current (130 µA) may offer advantages in low-power standby scenarios.

Compliance Considerations: All recommended substitutes are ROHS3 compliant and carry EAR99 ECCN classification. Moisture sensitivity levels range from MSL 1 (TC1265-3.3VETTR) to MSL 3 (all Texas Instruments variants), affecting storage and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can LP3964ES-3.3/NOPB be used as a direct drop-in replacement for LP3964ES-3.3?

A: Yes. LP3964ES-3.3/NOPB is electrically and mechanically identical to the original part. The primary differences are active product status, ROHS3 compliance, and packaging format (Tube vs. unspecified). Pin configuration and electrical performance are equivalent, enabling direct PCB substitution.

Q: What is the difference between LP3874ES-3.3/NOPB and LP3961ES-3.3/NOPB?

A: Both parts meet identical electrical specifications for 3.3V output, 800mA current, and TO-263 packaging. The base product numbers differ (LP3874 vs. LP3961), indicating different internal designs or manufacturing processes. Selection between these parts should be based on availability and supply chain considerations, as electrical performance is equivalent.

Q: Why does LP3871ES-3.3/NOPB have lower quiescent current?

A: LP3871ES-3.3/NOPB specifies 5 mA quiescent current compared to 9 mA for the original LP3964ES-3.3. This represents a design improvement in the LP3871 series, reducing standby power consumption. All other electrical parameters remain equivalent, making this part suitable for applications where lower idle current is beneficial.

Q: Can TC1265-3.3VETTR replace the LP3964ES-3.3 in all applications?

A: TC1265-3.3VETTR meets core voltage and current specifications but exhibits higher voltage dropout (1.4V @ 800mA vs. 0.35V). Applications with tight input voltage margins or high current draw may experience insufficient headroom with the Microchip part. Verify that your input voltage supply can accommodate the additional 1.05V dropout differential. The lower quiescent current (130 µA) may offset this limitation in certain low-power applications.

Q: What packaging formats are available for these substitutes?

A: All substitutes are available in TO-263 (DDPAK-5) surface mount packages. Texas Instruments variants are supplied in Tube packaging, while TC1265-3.3VETTR is supplied in Tape & Reel (TR) format. Package case designations are equivalent across all parts: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA.

Q: Are there any REACH or RoHS compliance differences between substitutes?

A: All recommended substitutes are ROHS3 compliant. REACH status varies: LP3964ES-3.3/NOPB, LP3874ES-3.3/NOPB, LP3871ES-3.3/NOPB, and TC1265-3.3VETTR are REACH Unaffected. LP3961ES-3.3/NOPB is REACH Affected. For applications requiring REACH Unaffected status, select from the other four options.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: Texas Instruments variants (LP3964ES-3.3/NOPB, LP3874ES-3.3/NOPB, LP3961ES-3.3/NOPB, LP3871ES-3.3/NOPB) are MSL 3 (168 Hours), requiring controlled storage and handling. TC1265-3.3VETTR is MSL 1 (Unlimited), allowing standard storage conditions without time-based constraints. MSL rating affects shelf life and reflow processing windows.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message