LP3882ES-1.8/NOPB Equivalent & Substitute Parts

Part Overview

The LP3882ES-1.8/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. This device is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity. The regulator integrates over-current, over-temperature, and short-circuit protection with an enable control feature, suitable for applications requiring stable 1.8V rails with moderate current demands.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	1.8V
Output Current	1.5A
Input Voltage (Max)	5.5V
Package Type	TO-263 (DDPAK-5)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LP3882ES-1.8/NOPB is determined by the following critical parameters:

Output voltage specification: 1.8V fixed
Output current capability: 1.5A minimum
Input voltage tolerance: 5.5V maximum
Package compatibility: TO-263 (DDPAK-5) surface mount
Protection and control features: Over-current, over-temperature, short-circuit protection with enable function
Operating temperature range: -40°C to 125°C
Regulatory compliance: ROHS3 compliance required

The LP38512TS-1.8/NOPB qualifies as a parametric equivalent based on matching all critical electrical specifications and package requirements. Both devices maintain identical output voltage, current rating, input voltage limits, temperature range, and protection architecture within the same physical package footprint.

Parameter Comparison

Parameter	LP3882ES-1.8/NOPB	LP38512TS-1.8/NOPB
Manufacturer	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active
Output Voltage (Fixed)	1.8V	1.8V
Output Current	1.5A	1.5A
Voltage - Input (Max)	5.5V	5.5V
Voltage Dropout (Max)	0.27V @ 1.5A	0.40V @ 1.5A
Current - Quiescent (Iq)	30 µA	7.5 mA
Current - Supply (Max)	8 mA	14 mA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)	73dB (120Hz ~ 1kHz)
Package / Case	TO-263-6, D2PAK (5 Leads + Tab)	TO-263-6, D2PAK (5 Leads + Tab)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Control Features	Enable	Enable
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The LP38512TS-1.8/NOPB is the active equivalent for the obsolete LP3882ES-1.8/NOPB. Selection should be based on the following factors:

Product Status: The LP3882ES-1.8/NOPB is obsolete, while the LP38512TS-1.8/NOPB maintains active production status. For new designs and ongoing production requirements, the LP38512TS-1.8/NOPB is the appropriate choice.

Regulatory Compliance: Both devices are ROHS3 compliant. The LP38512TS-1.8/NOPB carries REACH Affected status, whereas the LP3882ES-1.8/NOPB is REACH Unaffected. Verify REACH compliance requirements for your specific application and supply chain.

Electrical Performance Differences: The LP38512TS-1.8/NOPB exhibits higher quiescent current (7.5 mA vs. 30 µA) and maximum supply current (14 mA vs. 8 mA), along with increased dropout voltage (0.40V vs. 0.27V @ 1.5A) and slightly lower PSRR (73dB vs. 80dB ~ 65dB). These differences are acceptable for most applications but should be evaluated in power-sensitive or low-input-voltage designs.

Package Compatibility: Both devices use identical TO-263 (DDPAK-5) packaging, ensuring direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the LP38512TS-1.8/NOPB be used as a direct replacement for the LP3882ES-1.8/NOPB?

A: Yes. Both devices share identical output voltage (1.8V), output current (1.5A), input voltage limits (5.5V max), operating temperature range (-40°C to 125°C), and TO-263 package footprint. The electrical performance differences (dropout voltage, quiescent current, PSRR) are within acceptable tolerances for most applications. Verify specific design requirements for power dissipation and noise performance.

Q: What are the key differences between these two regulators?

A: The primary differences are product status (obsolete vs. active), quiescent current (30 µA vs. 7.5 mA), maximum supply current (8 mA vs. 14 mA), dropout voltage (0.27V vs. 0.40V @ 1.5A), and PSRR performance (80dB ~ 65dB vs. 73dB). The LP3882ES-1.8/NOPB offers lower quiescent current and better noise rejection, while the LP38512TS-1.8/NOPB is the active production alternative.

Q: Are there any PCB layout considerations when switching from LP3882ES-1.8/NOPB to LP38512TS-1.8/NOPB?

A: No layout changes are required. Both devices use the identical TO-263 (DDPAK-5) package with the same pin configuration and thermal tab placement. Existing PCB designs require no modification.

Q: What is the REACH compliance status difference?

A: The LP3882ES-1.8/NOPB is REACH Unaffected, while the LP38512TS-1.8/NOPB is REACH Affected. Confirm REACH compliance requirements with your supply chain and regulatory team before finalizing component selection.

Q: Which regulator should be selected for new designs?

A: The LP38512TS-1.8/NOPB should be selected for new designs due to its active production status and ongoing manufacturer support. The LP3882ES-1.8/NOPB is obsolete and should not be specified for new development.

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