LP2950-30LPRE3 Equivalent & Substitute Parts

Part Overview

The LP2950-30LPRE3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 100mA current capacity in a TO-92-3 through-hole package. This device operates across an input voltage range up to 30V with a maximum dropout voltage of 0.6V at 100mA, making it suitable for low-power regulation circuits requiring thermal and short-circuit protection.

The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary for design continuity, long-term availability assurance, and potential performance optimization in new designs.

Substiute Parts

LP2950-30LPRE3

Texas InstrumentsIn Stock: 7270LP2950-30LPRE3 Datasheet

Current PartRFQ

TPS70930DBVR

Texas InstrumentsIn Stock: 36241TPS70930DBVR Datasheet

MFR RecommendedRFQ

LP2950-30LPR

Texas InstrumentsIn Stock: 5367LP2950-30LPR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2950-30LPRE3 is determined by the following critical parameters:

• Output Voltage: Must be fixed at 3V
• Output Current Capability: Minimum 100mA required for direct replacement
• Input Voltage Range: Must support up to 30V maximum input
• Dropout Voltage: Lower values improve efficiency; higher values acceptable if circuit design permits
• Operating Temperature: Must cover -40°C to 125°C range
• Protection Features: Over current, over temperature, and short circuit protection required
• RoHS Compliance: ROHS3 Compliant status maintained

Two substitute categories exist:

1. Parametric Equivalent (LP2950-30LPR): Identical electrical specifications and TO-92-3 package, differing only in lead formation and supplier device package designation.

2. Functional Equivalent (TPS70930DBVR): Meets all core electrical requirements (3V output, 30V input max, -40°C to 125°C operation) with enhanced specifications (150mA output, lower quiescent current of 2.05 µA, additional control features). Package differs to SOT-23-5 surface mount, requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Specifications): LP2950-30LPR is the parametric equivalent with identical electrical performance and through-hole TO-92-3 packaging. Both devices share Last Time Buy status, indicating limited future availability. Selection between LP2950-30LPRE3 and LP2950-30LPR depends on current inventory requirements and lead formation specifications.

For Long-Term Design Continuity: TPS70930DBVR is recommended for new designs or redesigns requiring extended component availability. This device maintains Active product status with significantly higher inventory (36145 units). It provides superior specifications including 150mA output current (50% higher), dramatically reduced quiescent current (2.05 µA vs. 120 µA), and additional protection features (reverse current protection and UVLO). The trade-off is a higher dropout voltage (1.4V vs. 0.6V) and mandatory PCB redesign for surface-mount SOT-23-5 package integration.

All three devices maintain ROHS3 compliance and support the full -40°C to 125°C operating temperature range required for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can LP2950-30LPR directly replace LP2950-30LPRE3 without circuit modification? A: Yes. LP2950-30LPR is a parametric equivalent with identical electrical specifications, output voltage, current rating, dropout voltage, and protection features. Both use TO-92-3 through-hole packaging. Only the lead formation and supplier device package designation differ. No circuit or PCB layout changes are required.

Q: What are the limitations of using TPS70930DBVR as a substitute? A: TPS70930DBVR requires PCB redesign due to SOT-23-5 surface-mount package versus the through-hole TO-92-3 of the original part. The dropout voltage is higher (1.4V at 150mA versus 0.6V at 100mA), which may affect circuits with tight input voltage margins. Quiescent current is significantly lower (2.05 µA versus 120 µA), providing efficiency benefits in battery-powered applications.

Q: Why is TPS70930DBVR considered a functional equivalent despite higher dropout voltage? A: TPS70930DBVR meets all core substitution criteria: fixed 3V output, 30V maximum input voltage, -40°C to 125°C operating range, and required protection features. The higher dropout voltage does not prevent substitution; it requires verification that the circuit's input voltage headroom accommodates the increased voltage drop. For applications with adequate input voltage margin, this device provides superior performance through higher output current (150mA) and lower quiescent current.

Q: Are there package compatibility considerations between through-hole and surface-mount options? A: Yes. LP2950-30LPRE3 and LP2950-30LPR both use through-hole TO-92-3 packages suitable for breadboards and through-hole PCB designs. TPS70930DBVR uses surface-mount SOT-23-5 packaging, requiring SMD soldering equipment and PCB layout redesign. Through-hole and surface-mount packages are not interchangeable without significant design modification.

Q: Which substitute should be selected for new product designs? A: TPS70930DBVR is the recommended choice for new designs due to Active product status and high inventory availability. This ensures long-term component supply and design continuity. The surface-mount package aligns with modern PCB manufacturing practices. Existing through-hole designs can use LP2950-30LPR as a direct replacement while inventory remains available.

Q: Do all three parts maintain the same compliance certifications? A: Yes. LP2950-30LPRE3, LP2950-30LPR, and TPS70930DBVR are all ROHS3 compliant and REACH unaffected. All three carry EAR99 export classification and 8542.39.0001 HTSUS code, maintaining identical regulatory status for procurement and supply chain purposes.