LP3883ES-1.8/NOPB Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3883ES-1.8/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output applications with 3A current capacity in a TO-263 (DDPAK-5) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The regulator provides integrated over-current, over-temperature, and short-circuit protection with an enable control feature.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	1.8V
Output Current	3A
Input Voltage (Max)	5.5V
Voltage Dropout (Max)	0.42V @ 3A
Package Type	TO-263 (DDPAK-5)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3883ES-1.8/NOPB are selected based on the following critical parameters:

Fixed output voltage of 1.8V
Output current capability of 3A (or reduced current for lower-power applications)
Maximum input voltage of 5.5V or higher
TO-263 (DDPAK-5) package compatibility
Surface mount configuration
Operating temperature range of -40°C to 125°C
Protection features including over-current and over-temperature protection
ROHS3 compliance

The substitute parts are categorized as follows:

MFR Recommended: LP3962ES-1.8/NOPB (reduced current rating, active status)

MFR Recommended: TPS75718KTTR (full current rating match, active status, enhanced protection)

Parametric Equivalent: LP38513S-1.8/NOPB (full current rating match, active status)

Parameter Comparison

Parameter	LP3883ES-1.8/NOPB (Main)	LP3962ES-1.8/NOPB	TPS75718KTTR	LP38513S-1.8/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active
Output Voltage	1.8V	1.8V	1.8V	1.8V
Output Current	3A	1.5A	3A	3A
Input Voltage (Max)	5.5V	7V	5.5V	5.5V
Voltage Dropout (Max)	0.42V @ 3A	0.55V @ 1.5A	Not specified	0.43V @ 3A
Quiescent Current	30 µA	9 mA	200 µA	10 mA
Package Type	TO-263 (DDPAK-5)	TO-263 (DDPAK-5)	TO-263 (DDPAK-5)	TO-263 (DDPAK-5)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Reverse Polarity, UVLO	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	2 (1 Year)	3 (168 Hours)

Engineering Selection Recommendations

For Direct Replacement (3A Output Current Required):

LP38513S-1.8/NOPB is the parametric equivalent offering active product status with matching 3A output current, 1.8V fixed output, and nearly identical dropout voltage (0.43V vs. 0.42V). This part maintains the same protection feature set and operating temperature range. The TO-263 package compatibility ensures direct PCB layout compatibility.

TPS75718KTTR provides full current rating equivalence with enhanced protection features including reverse polarity protection and under-voltage lockout (UVLO). This part is suitable for applications requiring additional safeguards. Note the higher quiescent current (200 µA) compared to the main part (30 µA).

For Reduced Current Applications (1.5A Output Current):

LP3962ES-1.8/NOPB is suitable for designs where 1.5A output current is sufficient. This part offers active status and higher maximum input voltage (7V). The increased dropout voltage (0.55V @ 1.5A) and higher quiescent current (9 mA) should be evaluated against application requirements.

All substitute parts maintain ROHS3 compliance and are available from Texas Instruments in active production status, ensuring long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can LP3962ES-1.8/NOPB replace LP3883ES-1.8/NOPB in all applications?

A: LP3962ES-1.8/NOPB is suitable only for applications requiring 1.5A or less output current. The reduced current rating makes it unsuitable for designs requiring the full 3A capability of the original part.

Q: What is the primary advantage of TPS75718KTTR over LP38513S-1.8/NOPB?

A: TPS75718KTTR includes reverse polarity protection and under-voltage lockout (UVLO) features not present in LP38513S-1.8/NOPB. The choice depends on whether these additional protection mechanisms are required for the application.

Q: Are all substitute parts pin-compatible with the LP3883ES-1.8/NOPB?

A: All substitute parts use the TO-263 (DDPAK-5) package, ensuring mechanical and electrical pin compatibility for direct PCB replacement.

Q: What is the impact of higher quiescent current in TPS75718KTTR?

A: The TPS75718KTTR quiescent current of 200 µA is significantly higher than the LP3883ES-1.8/NOPB (30 µA). In battery-powered or low-power standby applications, this difference may impact overall system power consumption.

Q: Are all parts RoHS compliant?

A: All substitute parts are ROHS3 compliant, matching the compliance status of the original LP3883ES-1.8/NOPB.

Q: What does MSL rating mean for component selection?

A: MSL (Moisture Sensitivity Level) indicates the maximum time a component can be exposed to ambient conditions before soldering. LP3883ES-1.8/NOPB, LP3962ES-1.8/NOPB, and LP38513S-1.8/NOPB have MSL 3 (168 hours). TPS75718KTTR has MSL 2 (1 year), providing more relaxed storage and handling requirements.

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