LP3964ES-5.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP3964ES-5.0/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed to deliver a fixed 5V output at 800mA in a TO-263 (DDPAK-5) surface mount package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The regulator features integrated over-current, over-temperature, and short-circuit protection with an enable control function, suitable for applications requiring stable 5V power delivery in space-constrained environments.

Substiute Parts

LP3964ES-5.0/NOPB

Texas InstrumentsIn Stock: 1093LP3964ES-5.0/NOPB Datasheet

Current PartRFQ

MCP1826-5002E/ET

Microchip TechnologyIn Stock: 2224MCP1826-5002E/ET Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP3964ES-5.0/NOPB is determined by the following critical parameters:

• Output voltage specification (5V fixed)
• Output current capability (minimum 800mA)
• Package compatibility (TO-263-6 / DDPAK-5 form factor)
• Operating temperature range (-40°C to 125°C)
• Surface mount mounting type
• Protection and control feature availability
• RoHS3 compliance and regulatory status

The MCP1826-5002E/ET qualifies as a direct substitute based on matching these core electrical and mechanical specifications while offering enhanced performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

The MCP1826-5002E/ET is the qualified substitute for the obsolete LP3964ES-5.0/NOPB. Selection is based on:

• Identical 5V fixed output voltage specification
• Identical TO-263-6 (DDPAK-5) package footprint and pinout compatibility
• Output current rating of 1A exceeds the 800mA requirement of the original part
• Matching operating temperature range (-40°C to 125°C)
• Active product status with full manufacturer support and availability
• ROHS3 compliance maintained across both parts
• Enhanced feature set including Power Good output and Under Voltage Lockout protection
• Lower quiescent current (220 µA vs 9 mA) provides improved efficiency in standby conditions

The substitute part provides superior performance characteristics while maintaining electrical and mechanical compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can the MCP1826-5002E/ET be used as a direct replacement for the LP3964ES-5.0/NOPB?

A: Yes. Both devices share identical output voltage (5V), package form factor (TO-263-6 DDPAK-5), operating temperature range (-40°C to 125°C), and surface mount configuration. The MCP1826-5002E/ET provides higher output current capability (1A vs 800mA), making it suitable for the same applications and higher-demand scenarios.

Q: Are there any input voltage differences to consider?

A: The LP3964ES-5.0/NOPB specifies a maximum input voltage of 7V, while the MCP1826-5002E/ET specifies 6V maximum. Designs operating at input voltages between 6V and 7V require verification that the lower input voltage rating of the substitute part is acceptable for the application.

Q: What is the package compatibility between these parts?

A: Both parts use the TO-263-6 (DDPAK-5) package with identical pinout and footprint. No PCB layout modifications are required for substitution.

Q: How do the protection features differ?

A: The LP3964ES-5.0/NOPB includes over-current, over-temperature, and short-circuit protection. The MCP1826-5002E/ET includes over-temperature, short-circuit, and under-voltage lockout (UVLO) protection. The MCP1826-5002E/ET adds UVLO functionality while replacing over-current protection with UVLO.

Q: What is the significance of the Power Good output on the MCP1826-5002E/ET?

A: The Power Good output is an additional control feature not present on the LP3964ES-5.0/NOPB. This output can be used to signal system status when the regulated output voltage is within specification, providing enhanced system monitoring capability.

Q: Are both parts RoHS compliant?

A: Yes. Both the LP3964ES-5.0/NOPB and MCP1826-5002E/ET are ROHS3 compliant, meeting environmental and regulatory requirements for electronic components.