LP38842S-1.5/NOPB Equivalent & Substitute Parts

Part Overview

The LP38842S-1.5/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed output applications. This device delivers 1.5A output current with a fixed 1.5V output voltage and operates across an input voltage range up to 5.5V. The regulator features integrated protection mechanisms including over-current, over-temperature, and under-voltage lockout (UVLO) protection, making it suitable for applications requiring stable low-voltage power delivery with thermal and current safeguards. The part is currently in active production status with 22,361 units available in inventory.

Identifying equivalent and substitute parts becomes necessary when addressing supply chain constraints, inventory availability, packaging preferences, or specific compliance requirements for your application.

Substiute Parts

LP38842S-1.5/NOPB

Texas InstrumentsIn Stock: 22449LP38842S-1.5/NOPB Datasheet

Current PartRFQ

LP3892ES-1.5/NOPB

Texas InstrumentsIn Stock: 1388LP3892ES-1.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP38842S-1.5/NOPB is determined by the following critical parameters:

• Output voltage specification (1.5V fixed)
• Output current capability (1.5A minimum)
• Input voltage tolerance (5.5V maximum)
• Package type (TO-263 DDPAK-5 form factor)
• Protection feature set (Over Current, Over Temperature, UVLO)
• Operating temperature range (-40°C to 125°C)
• Regulatory compliance (ROHS3)

The LP3892ES-1.5/NOPB qualifies as a parametric equivalent based on matching these core electrical and mechanical specifications. Both devices share identical output voltage, output current, input voltage maximum, package configuration, protection features, and operating temperature range. Variations in voltage dropout characteristics and quiescent current do not disqualify substitution when the application requirements fall within the specified parameters of both parts.

Parameter Comparison

Engineering Selection Recommendations

Both the LP38842S-1.5/NOPB and LP3892ES-1.5/NOPB are active production devices manufactured by Texas Instruments and maintain ROHS3 compliance. The LP38842S-1.5/NOPB exhibits superior voltage dropout performance at 0.315V compared to the LP3892ES-1.5/NOPB at 0.5V, which may be a determining factor in applications with tight input voltage margins or high efficiency requirements. The LP3892ES-1.5/NOPB is available in tube packaging, whereas the LP38842S-1.5/NOPB packaging specification is not detailed in the provided data.

Selection between these parts should be based on specific application requirements regarding dropout voltage performance, packaging format availability, and supply chain considerations. Both devices satisfy the core functional and compliance requirements for 1.5V, 1.5A linear regulation applications.

Frequently Asked Questions (FAQ)

Q: Can the LP3892ES-1.5/NOPB directly replace the LP38842S-1.5/NOPB in my circuit?

A: Yes, the LP3892ES-1.5/NOPB is a parametric equivalent. Both devices share identical output voltage (1.5V), output current (1.5A), input voltage maximum (5.5V), package type (TO-263 DDPAK-5), protection features, and operating temperature range. The primary difference is voltage dropout specification (0.5V versus 0.315V), which must be evaluated against your application's input voltage headroom requirements.

Q: What is the significance of the voltage dropout difference between these parts?

A: Voltage dropout determines the minimum input voltage required to maintain regulation at full output current. The LP38842S-1.5/NOPB requires 1.815V minimum input (1.5V output + 0.315V dropout), while the LP3892ES-1.5/NOPB requires 2.0V minimum input (1.5V output + 0.5V dropout). Applications with input voltages between 1.815V and 2.0V will only function with the LP38842S-1.5/NOPB.

Q: Are there packaging differences between these substitute parts?

A: Both devices use the TO-263 (DDPAK-5) package form factor. The LP3892ES-1.5/NOPB is specified as available in tube packaging, while the LP38842S-1.5/NOPB packaging format is not detailed in the provided specifications. Verify packaging availability with your supplier based on your assembly requirements.

Q: Do both parts meet the same regulatory compliance standards?

A: Both the LP38842S-1.5/NOPB and LP3892ES-1.5/NOPB are ROHS3 compliant and carry identical MSL ratings (3, 168 Hours). The LP3892ES-1.5/NOPB is REACH Affected, while the LP38842S-1.5/NOPB is REACH Unaffected. Verify REACH compliance requirements for your specific application and end market.

Q: What protection features are included in both devices?

A: Both the LP38842S-1.5/NOPB and LP3892ES-1.5/NOPB include over-current protection, over-temperature protection, and under-voltage lockout (UVLO). These features provide thermal shutdown and current limiting to protect the regulator and downstream circuitry under fault conditions.