LP3852ES-1.8 Equivalent & Substitute Parts

Part Overview

The LP3852ES-1.8 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 1.8V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. The device is currently marked as Obsolete, making equivalent and substitute parts necessary for ongoing production and design updates. This reference page identifies compatible alternatives that maintain electrical and mechanical compatibility within the allowed parameter specifications.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.8V
Voltage - Input (Max)	7V
Current - Output	1.5A
Voltage Dropout (Max)	0.38V @ 1.5A
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Mounting Type	Surface Mount
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP3852ES-1.8 are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

Output voltage: 1.8V fixed
Output current capability: 1.5A
Maximum input voltage: 7V
Package type: TO-263 (DDPAK-5)
Surface mount configuration
Operating temperature range: -40°C ~ 125°C
Protection features: Over Current, Over Temperature, Short Circuit

Substitution Categories:

Direct Equivalent (Pin-Compatible, Identical Electrical Performance): LP3852ES-1.8/NOPB maintains identical electrical specifications and differs only in product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. RoHS non-compliant).

Parametric Equivalents (Functionally Compatible with Minor Parameter Variations): LP3855ES-1.8/NOPB, LP3872ES-1.8/NOPB, LP3875ES-1.8/NOPB, LP3962ES-1.8/NOPB, and LP3965ES-1.8/NOPB meet all critical electrical and mechanical requirements. Variations exist in voltage dropout specifications, quiescent current, and supply current, but these do not prevent functional substitution within the allowed parameter envelope.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Voltage	Output Current	Voltage Dropout @ 1.5A	Quiescent Current	Supply Current (Max)	PSRR	Package	RoHS Status	Inventory
LP3852ES-1.8	Texas Instruments	Obsolete	1.8V	1.5A	0.38V	3 mA	10 mA	73dB ~ 57dB (120Hz)	TO-263 (DDPAK-5)	RoHS non-compliant	912 Pcs
LP3852ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.38V	3 mA	10 mA	73dB ~ 57dB (120Hz)	TO-263 (DDPAK-5)	ROHS3 Compliant	913 Pcs
LP3855ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.38V	3 mA	10 mA	73dB ~ 57dB (120Hz)	TO-263 (DDPAK-5)	ROHS3 Compliant	1066 Pcs
LP3872ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.55V	5 mA	15 mA	73dB ~ 57dB (120Hz)	TO-263 (DDPAK-5)	ROHS3 Compliant	1115 Pcs
LP3875ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.55V	5 mA	15 mA	73dB ~ 57dB (120Hz)	TO-263 (DDPAK-5)	ROHS3 Compliant	961 Pcs
LP3962ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.55V	9 mA	15 mA	Not specified	TO-263 (DDPAK-5)	ROHS3 Compliant	1212 Pcs
LP3965ES-1.8/NOPB	Texas Instruments	Active	1.8V	1.5A	0.55V	9 mA	15 mA	Not specified	TO-263 (DDPAK-5)	ROHS3 Compliant	864 Pcs
LP3872ES-1.8	Texas Instruments	Not For New Designs	1.8V	1.5A	0.55V	5 mA	15 mA	73dB ~ 57dB (120Hz)	TO-263 (DDPAK-5)	RoHS non-compliant	5350 Pcs

Engineering Selection Recommendations

For New Designs and Production Updates: LP3852ES-1.8/NOPB is the primary recommended substitute. It maintains identical electrical performance to the original LP3852ES-1.8 while offering Active product status and ROHS3 compliance, eliminating obsolescence risk and meeting current regulatory requirements.

For Applications with Relaxed Dropout Voltage Tolerance: LP3855ES-1.8/NOPB, LP3872ES-1.8/NOPB, LP3875ES-1.8/NOPB, LP3962ES-1.8/NOPB, and LP3965ES-1.8/NOPB are functionally compatible alternatives. These parts accept higher voltage dropout (0.55V vs. 0.38V) and increased quiescent/supply current. All are Active status with ROHS3 compliance.

For Existing Inventory Management: LP3872ES-1.8 (Not For New Designs status) remains available with 5350 units in stock. This part is suitable for sustaining production of existing designs but should not be selected for new development due to its lifecycle status and RoHS non-compliance.

Compliance Considerations: All recommended Active substitutes (LP3852ES-1.8/NOPB, LP3855ES-1.8/NOPB, LP3872ES-1.8/NOPB, LP3875ES-1.8/NOPB, LP3962ES-1.8/NOPB, LP3965ES-1.8/NOPB) carry ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can LP3852ES-1.8/NOPB be used as a direct replacement for LP3852ES-1.8? A: Yes. LP3852ES-1.8/NOPB is electrically and mechanically identical to LP3852ES-1.8. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Pin configuration and electrical performance are unchanged.

Q: What is the difference between LP3852ES-1.8 and LP3855ES-1.8/NOPB? A: Both deliver 1.8V at 1.5A in TO-263 packaging. LP3855ES-1.8/NOPB maintains the same 0.38V dropout voltage and 3 mA quiescent current as the original. The primary difference is product status and RoHS compliance. LP3855ES-1.8/NOPB is Active and ROHS3 compliant.

Q: Why do LP3872ES-1.8/NOPB, LP3875ES-1.8/NOPB, LP3962ES-1.8/NOPB, and LP3965ES-1.8/NOPB have higher dropout voltages? A: These parts are parametric equivalents designed for the same output voltage and current but with different internal circuit topologies. The 0.55V dropout (vs. 0.38V) represents a design trade-off. They remain functionally compatible for applications where the higher dropout voltage is within system tolerance.

Q: Are all substitute parts in the same package? A: Yes. All substitute parts use the TO-263 (DDPAK-5) surface mount package with identical pinout and mechanical dimensions. Direct PCB substitution is possible without layout changes.

Q: Which substitute should I select for a new design? A: LP3852ES-1.8/NOPB is the recommended choice for new designs. It provides identical electrical performance to the original obsolete part while offering Active product status and ROHS3 compliance.

Q: Can I use LP3872ES-1.8 (Not For New Designs) in production? A: LP3872ES-1.8 is suitable for sustaining production of existing designs only. It should not be selected for new development due to its lifecycle status. For new designs, use LP3852ES-1.8/NOPB or other Active-status alternatives.

Q: What is the impact of higher quiescent current in LP3962ES-1.8/NOPB and LP3965ES-1.8/NOPB? A: These parts draw 9 mA quiescent current compared to 3 mA in the original. This increases standby power consumption. Select these alternatives only if higher quiescent current is acceptable for your application.

Q: Are all substitute parts RoHS compliant? A: All Active-status substitutes (LP3852ES-1.8/NOPB, LP3855ES-1.8/NOPB, LP3872ES-1.8/NOPB, LP3875ES-1.8/NOPB, LP3962ES-1.8/NOPB, LP3965ES-1.8/NOPB) are ROHS3 compliant. LP3872ES-1.8 (Not For New Designs) is RoHS non-compliant.

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