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Texas Instruments LP2950ACZ-5.0/LFT3
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- Part No.:
- LP2950ACZ-5.0/LFT3
- Manufacturer:
- Texas Instruments
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LP2950ACZ-5.0/LFT3.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,025
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Product details
Overview
LP2950ACZ-5.0/LFT3 from Texas Instruments is a fixed-output 5.0 V micropower low-dropout (LDO) linear voltage regulator in TO-92 package, delivering up to 100 mA output current with 4.975–5.025 V output accuracy at 25°C, 75 µA typical quiescent current, and 380 mV dropout at 100 mA - optimized for battery-powered instrumentation and portable sensors.
For engineers reviewing the LP2950ACZ-5.0/LFT3 datasheet, LP2950ACZ-5.0/LFT3 pinout, LP2950ACZ-5.0/LFT3 application, or LP2950ACZ-5.0/LFT3 equivalent, key selection criteria include guaranteed 100-mA load capability, ±0.5% initial output tolerance, stable operation with 1 µF ceramic input and 2.2 µF output capacitors, and thermal/overcurrent protection without external components.
Technical Context
The LP2950ACZ-5.0/LFT3 implements a PNP-based pass transistor architecture with internal 1.235 V reference and precision error amplifier, enabling tight line regulation (0.03% typ) and load regulation (0.04% typ). Its quiescent current remains near-constant across input voltage (2.3 V to 30 V) and load (100 µA to 100 mA), with only slight increase in dropout - critical for extended battery runtime.
No shutdown or error flag functionality is integrated; this is a 3-pin fixed-voltage variant distinct from the 8-pin LP2951-N family. It operates as a standalone regulator or precision 5 V reference, requiring no feedback resistors or external logic control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal, 4.975–5.025 V (±0.5% at 25°C) - ensures compatibility with 5 V logic and analog circuitry without post-regulation trimming |
| Max Output Current | 100 mA - sufficient for microcontrollers, sensors, and RF modules in compact portable designs |
| Dropout Voltage | 380 mV at 100 mA - enables regulation from 5.38 V input, supporting single-cell LiFePO₄ or dual-cell alkaline sources |
| Quiescent Current | 75 µA typical - extends shelf life and operational runtime in always-on monitoring systems |
| Line Regulation | 0.03% typical - maintains output stability despite battery voltage sag or supply ripple |
| Load Regulation | 0.04% typical - holds output within 2 mV across full 100 µA–100 mA load range |
| Temp Coefficient | 20–120 ppm/°C - contributes ≤6 mV drift over –40°C to +125°C, suitable for industrial-grade sensing |
Pinout & Package
LP2950ACZ-5.0/LFT3 uses the 3-pin TO-92 (LP) package (4.30 mm × 4.30 mm), with leads arranged in standard emitter-collector-base order for drop-in replacement of legacy 5 V regulators.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output terminal | Delivers stable 5.0 V; requires ≥1 µF ceramic input and ≥2.2 µF output capacitance for stability |
| 2 (GND) | Ground reference | Common return path for input, output, and internal bias; must be low-impedance connection |
| 3 (IN) | Unregulated input supply | Accepts 2.3 V to 30 V; minimum headroom = dropout voltage + 100 mV margin for transient loads |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V output | Factory-trimmed, no external resistors needed - reduces BOM count and layout complexity |
| Low dropout at full load | 380 mV @ 100 mA enables use with marginal input sources (e.g., aging batteries or unregulated wall adapters) |
| High DC accuracy | ±0.5% initial tolerance + 0.04% load regulation = <±6 mV total deviation under full operating conditions |
| Stable with low-ESR caps | Works with 10 mΩ–6 Ω ESR output capacitors - supports cost-effective X5R/X7R ceramics instead of tantalum |
| Integrated protection | Thermal shutdown and foldback current limiting prevent damage during overload or short-circuit events |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Continuous temperature/humidity monitoring in handheld diagnostic tools powered by two AA cells. IC Role / Device Role / Timing Role: Primary 5 V power rail regulator supplying MCU, ADC, and wireless transceiver. Use Value: 75 µA quiescent current extends battery life to >2 years in sleep mode; 380 mV dropout allows operation down to 4.8 V input. |
Use Scenario: Remote environmental monitoring node deployed in factory settings with wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision 5 V reference and supply for 16-bit sigma-delta ADC and real-time clock. Use Value: ±0.5% output tolerance and 20 ppm/°C tempco ensure <±0.5 LSB measurement error across –40°C to +85°C. |
| Smart Meter Front-End | IoT Edge Node Power |
Use Scenario: Auxiliary 5 V rail in electricity meters where main supply is rectified AC but backup is coin cell. IC Role / Device Role / Timing Role: Standby regulator maintaining RTC and nonvolatile memory during mains outage. Use Value: Stable 5 V output with <100 µA ground current preserves coin cell energy for >10-year backup duration. |
Use Scenario: Compact battery-powered sensor node integrating BLE SoC, MEMS accelerometer, and flash memory. IC Role / Device Role / Timing Role: Single-point LDO delivering clean 5 V to mixed-signal subsystems. Use Value: 0.03% line regulation rejects ripple from switching charger ICs; 1 µF input cap fits space-constrained PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70033DCKR | 3.3 V fixed output, 200 mA rated, 30 µA IQ, SOT-23-5 package | Not pin-compatible; requires different footprint and 3.3 V system architecture | Select when lower quiescent current and higher output current are prioritized over 5 V compatibility |
| MCP1700-5002E/TO | 5.0 V fixed output, 250 mA rated, 1.6 µA IQ, TO-92 package, ±2% tolerance | Looser initial accuracy (±2% vs ±0.5%) but ultra-low IQ enables decade-scale battery life | Prefer for ultra-low-power wake-on-event systems where absolute voltage precision is secondary to standby current |
Compared with TLV70033DCKR and MCP1700-5002E/TO, LP2950ACZ-5.0/LFT3 delivers superior DC accuracy and tighter regulation for 5 V analog/sensing rails, while retaining TO-92 compatibility and proven robustness in industrial temperature ranges - making it optimal where precision and legacy footprint matter more than sub-µA quiescent current.
Availability
LP2950ACZ-5.0/LFT3 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, smart meter front-ends, and IoT edge node power requiring stable component supply with long-term manufacturability.
Supply support for LP2950ACZ-5.0/LFT3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with decades of leadership in power management ICs.
LP2950ACZ-5.0/LFT3 belongs to TI's LP295x-N series of micropower LDO regulators, designed specifically for battery-powered instrumentation, portable sensors, and industrial monitoring systems demanding high accuracy and ultra-low quiescent current.
FAQ
What is the maximum input voltage rating for LP2950ACZ-5.0/LFT3?
The absolute maximum input voltage for LP2950ACZ-5.0/LFT3 is 30 V, per TI's SNVS764Q datasheet. However, recommended operating conditions limit continuous input to ≤30 V with proper thermal management. Exceeding this risks permanent damage due to junction overheating or breakdown, especially at high ambient temperatures or full load.
Does LP2950ACZ-5.0/LFT3 support shutdown or enable functionality?
No, LP2950ACZ-5.0/LFT3 does not include shutdown or enable functionality. It is a 3-pin fixed-output variant without SHUTDOWN or ERROR pins - unlike the 8-pin LP2951-N family. To disable output, the input supply must be removed or disconnected externally.
What output capacitor value and type are required for stable operation of LP2950ACZ-5.0/LFT3?
LP2950ACZ-5.0/LFT3 requires a minimum 2.2 µF output capacitor with ESR between 10 mΩ and 6 Ω. Ceramic X5R/X7R types are recommended for reliability and size efficiency. The datasheet confirms stability with low-ESR ceramics, eliminating need for larger tantalum or aluminum electrolytic capacitors.
Can LP2950ACZ-5.0/LFT3 be used as a precision voltage reference?
Yes, LP2950ACZ-5.0/LFT3 is specified for use as both a regulator and a low-power voltage reference. Its 0.5% initial tolerance, 0.04% load regulation, and 20 ppm/°C temperature coefficient make it suitable for calibrating ADCs or biasing precision op-amps where 5 V reference stability is critical.
Is LP2950ACZ-5.0/LFT3 RoHS-compliant and lead-free?
Yes, LP2950ACZ-5.0/LFT3 is RoHS-compliant and lead-free. The "/LFT3" suffix in the part number denotes lead-free, green (halogen-free) packaging per TI's standard environmental compliance policy, verified in TI's official product change notices and packaging data sheets.
LP2950ACZ-5.0/LFT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- 14 mA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LP2950ACZ-5.0/LFT3 FAQ
1.How can I place an order for LP2950ACZ-5.0/LFT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950ACZ-5.0/LFT3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LP2950ACZ-5.0/LFT3 reliable?
The price and inventory of LP2950ACZ-5.0/LFT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2950ACZ-5.0/LFT3 is usually 5 days.
3.What payment methods are accepted for LP2950ACZ-5.0/LFT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950ACZ-5.0/LFT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950ACZ-5.0/LFT3?
LP2950ACZ-5.0/LFT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950ACZ-5.0/LFT3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LP2950ACZ-5.0/LFT3?
For technical support, including LP2950ACZ-5.0/LFT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950ACZ-5.0/LFT3 requirements.
6.How does Aetrix verify that LP2950ACZ-5.0/LFT3 is sourced from the original manufacturer or authorized distributors?
All LP2950ACZ-5.0/LFT3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LP2950ACZ-5.0/LFT3 meets industry standards.
7.What is the process for return or replacement of LP2950ACZ-5.0/LFT3?
All LP2950ACZ-5.0/LFT3 units undergo pre-shipment inspection (PSI). If there is an issue with LP2950ACZ-5.0/LFT3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LP2950ACZ-5.0/LFT3 part is unused and in its original packaging.
Return procedure for LP2950ACZ-5.0/LFT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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