LP3883ESX-1.2 Equivalent & Substitute Parts

Part Overview

The LP3883ESX-1.2 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 1.2V output at 3A maximum current in a TO-263 (DDPAK-5) surface mount package. The device is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring this specific voltage regulation topology and electrical performance.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LP3883ESX-1.2
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.2V
Output Current	3A
Input Voltage (Max)	5.5V
Voltage Dropout (Max)	0.42V @ 3A
Quiescent Current	30 µA
Package	TO-263 (DDPAK-5)
Operating Temperature Range	-40°C to 125°C
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3883ESX-1.2 are qualified based on the following critical electrical and mechanical parameters:

Fixed output voltage of 1.2V
Output current capability of 3A
Maximum input voltage of 5.5V
TO-263 (DDPAK-5) package compatibility
Surface mount mounting type
Operating temperature range of -40°C to 125°C
Protection features including over-current, over-temperature, and short-circuit protection
Enable control feature
Positive output configuration with single regulator

The substitute parts identified maintain electrical equivalence within the allowed parameter tolerances for this product category. Variations in quiescent current supply and voltage dropout characteristics remain within acceptable operational margins for linear regulator applications.

Parameter Comparison

Parameter	LP3883ESX-1.2	LP3883ESX-1.2/NOPB	LP38843SX-1.2/NOPB
Manufacturer	Texas Instruments	National Semiconductor	National Semiconductor
Output Voltage (Fixed)	1.2V	1.2V	1.2V
Output Current	3A	3A	3A
Input Voltage (Max)	5.5V	5.5V	5.5V
Voltage Dropout (Max)	0.42V @ 3A	0.42V @ 3A	0.5V @ 3A
Quiescent Current	30 µA	30 µA	30 µA
Current - Supply (Max)	8 mA	8 mA	40 mA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)	80dB ~ 65dB (120Hz ~ 1kHz)	80dB ~ 65dB (120Hz ~ 1kHz)
Package	TO-263 (DDPAK-5)	TO-263 (DDPAK-5)	TO-263 (DDPAK-5)
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Product Status	Last Time Buy	Active	Active
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit

Engineering Selection Recommendations

LP3883ESX-1.2/NOPB is the primary substitute candidate. This part maintains identical electrical specifications including voltage dropout, quiescent current, and supply current maximum. Both the original and this substitute are in active product status or equivalent lifecycle stages, ensuring long-term availability. The part is ROHS3 compliant and carries the same regulatory certifications (ECCN: EAR99, HTSUS: 8542.39.0001).

LP38843SX-1.2/NOPB is a secondary substitute option. While it maintains the same output voltage, current, and input voltage specifications, it exhibits a higher voltage dropout of 0.5V at 3A compared to 0.42V, and an elevated maximum supply current of 40 mA versus 8 mA. This part remains suitable for applications where the increased dropout voltage and supply current do not impact system performance. The part is in active product status, supporting long-term design continuity.

Both substitute parts are surface mount compatible in the TO-263 (DDPAK-5) package and operate across the full -40°C to 125°C temperature range. Selection between substitutes should be based on specific application requirements regarding voltage dropout and quiescent power consumption.

Frequently Asked Questions (FAQ)

Q: Can LP3883ESX-1.2/NOPB be used as a direct replacement for LP3883ESX-1.2?

A: Yes. Both parts deliver 1.2V fixed output at 3A maximum current with identical voltage dropout (0.42V @ 3A), quiescent current (30 µA), and maximum supply current (8 mA). The TO-263 (DDPAK-5) package pinout and electrical performance are equivalent. The primary difference is product status and packaging format (Tape & Reel versus Bulk).

Q: What are the key differences between LP3883ESX-1.2/NOPB and LP38843SX-1.2/NOPB?

A: Both parts share identical output voltage (1.2V), output current (3A), input voltage maximum (5.5V), and quiescent current (30 µA). The LP38843SX-1.2/NOPB exhibits higher voltage dropout (0.5V @ 3A versus 0.42V) and higher maximum supply current (40 mA versus 8 mA). These differences may affect thermal performance and power efficiency in applications with tight voltage margin requirements.

Q: Are the substitute parts pin-compatible with the original LP3883ESX-1.2?

A: Yes. All three parts use the TO-263 (DDPAK-5) package with identical pinout configuration. Direct PCB footprint compatibility is maintained without layout modifications.

Q: Do the substitute parts meet the same regulatory and compliance standards?

A: Yes. Both substitute parts carry ROHS3 compliance, REACH Unaffected status, and identical export classification (ECCN: EAR99, HTSUS: 8542.39.0001) as the original LP3883ESX-1.2.

Q: Which substitute should be selected for new designs?

A: LP3883ESX-1.2/NOPB is recommended for new designs due to identical electrical specifications and active product status. LP38843SX-1.2/NOPB is suitable where the increased voltage dropout and supply current do not constrain application performance.

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