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Texas Instruments LP2950CZ-5.0/LFT8
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- Part No.:
- LP2950CZ-5.0/LFT8
- Manufacturer:
- Texas Instruments
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LP2950CZ-5.0/LFT8.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,928
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Product details
Overview
LP2950CZ-5.0/LFT8 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 40 mV typical dropout at light load and ±0.5% initial output voltage accuracy at 25°C. It operates from 2.3 V to 30 V input and maintains regulation down to 2.3 V over temperature, making it suitable for single-cell Li-ion, multi-cell alkaline, or industrial backup power rails.
For engineers reviewing the LP2950CZ-5.0/LFT8 datasheet, LP2950CZ-5.0/LFT8 pinout, LP2950CZ-5.0/LFT8 application, or LP2950CZ-5.0/LFT8 equivalent, key selection criteria include guaranteed 100-mA output under dropout conditions, 75 µA typical quiescent current, stability with 1 µF ceramic output capacitor, and compatibility with battery-powered systems requiring undervoltage warning-free operation and minimal standby power draw.
Technical Context
The LP2950CZ-5.0/LFT8 implements a PNP-based pass transistor architecture enabling ultra-low quiescent current (75 µA typ.) that increases only slightly in dropout-critical for extending battery runtime. Its internal 1.235 V reference and precision trimming yield 0.5% typical initial output tolerance and 20 ppm/°C typical temperature coefficient.
Unlike the LP2951-N family, this variant lacks shutdown, error flag, feedback, or sense pins: it is a 3-pin fixed-output regulator with IN, OUT, and GND terminals only. It requires no external resistors and supports direct replacement of legacy 78L05-style regulators in space-constrained TO-92 layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±0.5% (typical initial tolerance at 25°C); ensures stable logic supply for microcontrollers and sensors without post-regulation calibration. |
| Max Output Current | 100 mA (ensured); sufficient for powering small MCU subsystems, RTCs, or analog front-ends in portable instrumentation. |
| Dropout Voltage | 380 mV at 100 mA (max); enables regulation from 5.38 V input-ideal for single Li-ion (3.0–4.2 V) with boost stage or 6 V nominal battery systems. |
| Quiescent Current | 75 µA typical; draws <1 µA additional current in dropout, preserving battery life during brownout conditions. |
| Line Regulation | 0.03% typical (for VIN = 6 V to 30 V); minimizes output drift across wide input ranges common in automotive or industrial 12 V rail applications. |
| Load Regulation | 0.04% typical (100 µA to 100 mA); maintains tight voltage control despite dynamic load switching in sensor nodes or wireless transceivers. |
| Stability Capacitor | 1 µF ceramic (min); eliminates need for tantalum or electrolytic capacitors-reducing BOM cost and board area in compact designs. |
Pinout & Package
LP2950CZ-5.0/LFT8 is housed in a 3-pin TO-92 plastic package (body size 4.30 mm × 4.30 mm), compatible with standard through-hole PCB footprints and manual assembly processes. The package features a vertical lead configuration with emitter-collector-base pinout mapped to regulator functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (OUT) | Regulated output terminal | Delivers stable 5.0 V to load; must be decoupled with ≥1 µF ceramic capacitor placed within 5 mm of pin for stability. |
| Pin 2 (GND) | Ground reference | Common return path for input/output currents; connects directly to PCB ground plane to minimize noise coupling and thermal resistance. |
| Pin 3 (IN) | Unregulated input supply | Accepts 2.3 V to 30 V DC; requires ≥1 µF ceramic input capacitor near pin to suppress high-frequency ripple and transient spikes. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 75 µA typical quiescent current extends battery life in always-on IoT endpoints and remote sensors. |
| Low dropout performance | 40 mV typical dropout at light load enables efficient regulation from marginal input sources like partially discharged batteries. |
| High output accuracy | ±0.5% initial tolerance and 0.05% typical line/load regulation support precision analog circuitry without external trimming. |
| Thermal & current protection | Integrated foldback current limiting and thermal shutdown prevent damage during overload or ambient temperature excursions. |
| Low-ESR capacitor support | Stable with 10 mΩ to 6 Ω output capacitor ESR-compatible with low-cost X7R/X5R ceramics instead of higher-ESR tantalums. |
Applications
| Battery-Powered Sensor Node | Industrial Control I/O Module |
|---|---|
|
Use Scenario: A wireless temperature sensor powered by two AA alkaline cells (1.8–3.2 V) uses a boost converter followed by LP2950CZ-5.0/LFT8 to generate clean 5 V for MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 5 V LDO regulator providing stable supply independent of battery voltage decay. Use Value: 75 µA quiescent current minimizes self-discharge; 380 mV dropout ensures regulation until battery drops below 5.38 V-capturing full usable cell capacity. |
Use Scenario: DIN-rail mounted PLC I/O module derives 5 V from a 12 V industrial bus for digital isolators and level translators. IC Role / Device Role / Timing Role: Local point-of-load regulator supplying isolated logic domains with low-noise, tightly regulated 5 V. Use Value: 0.04% load regulation prevents logic threshold shifts during simultaneous channel activation; TO-92 package simplifies conformal coating and mechanical mounting. |
| Medical Wearable Device | Legacy Equipment Power Retrofit |
|
Use Scenario: Portable pulse oximeter uses a single Li-ion cell (3.0–4.2 V) and LP2950CZ-5.0/LFT8 after boost to power optical drivers and ADC. IC Role / Device Role / Timing Role: Final-stage low-noise 5 V regulator ensuring stable reference for 16-bit analog measurements. Use Value: 20 ppm/°C temperature coefficient limits output drift to <1.5 mV over 0–70°C operating range-preserving measurement accuracy. |
Use Scenario: Replacement of obsolete 78L05 in aging test equipment where PCB layout cannot be modified. IC Role / Device Role / Timing Role: Pin-compatible drop-in upgrade delivering tighter regulation and lower power than legacy bipolar regulators. Use Value: TO-92 footprint and identical 3-pin assignment enable direct solder replacement; ±0.5% tolerance improves system-level calibration stability. |
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 |
|---|---|---|---|
| LP2950ACZ-5.0 | Same TO-92 package and 5 V output, but specified over –40°C to +125°C industrial temp range vs. LP2950CZ-5.0/LFT8's 0°C to +125°C range. | Suitable for under-hood automotive or outdoor industrial enclosures where extended low-temp operation is required. | Select LP2950ACZ-5.0 when ambient operating temperature may fall below 0°C; otherwise LP2950CZ-5.0/LFT8 meets commercial-grade requirements at lower cost. |
| TLV70550DBVR | 5 V fixed-output SOT-23-5 LDO with 300 nA quiescent current and 170 mV dropout at 200 mA-but requires separate enable pin and has different pinout. | Preferred for ultra-low-power wearables or energy-harvesting systems where sub-µA sleep current is mandatory. | Choose TLV70550DBVR only if board redesign accommodates SOT-23-5 footprint and enable control; LP2950CZ-5.0/LFT8 remains optimal for TO-92-restricted or cost-sensitive through-hole designs. |
Compared with LP2950ACZ-5.0, LP2950CZ-5.0/LFT8 trades extended low-temperature capability for lower unit cost and qualification scope, while versus TLV70550DBVR it prioritizes mechanical compatibility and proven field reliability over nanoscale quiescent current-making it the preferred choice for commercial-grade, space-constrained through-hole applications demanding robust 100-mA regulation.
Availability
LP2950CZ-5.0/LFT8 is available at Aetrix Electronics and suitable for battery-powered sensor nodes, industrial I/O modules, medical wearables, and legacy equipment retrofits requiring stable component supply and long-term manufacturability.
Supply support for LP2950CZ-5.0/LFT8 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 leader specializing in analog and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
LP2950CZ-5.0/LFT8 belongs to TI's LP295x-N series of micropower LDO regulators, engineered specifically for battery longevity and precision voltage regulation in portable, industrial, and medical electronics where low quiescent current and high accuracy are critical.
FAQ
What is the maximum input voltage rating for LP2950CZ-5.0/LFT8?
The absolute maximum input voltage for LP2950CZ-5.0/LFT8 is 30 V, per TI's SNVS764Q datasheet Absolute Maximum Ratings table. Operation above this level risks permanent device damage. For reliable long-term use, TI recommends keeping input voltage ≤30 V and within the Recommended Operating Conditions of 2.3 V to 30 V.
Does LP2950CZ-5.0/LFT8 include an enable or shutdown pin?
No, LP2950CZ-5.0/LFT8 does not include a shutdown or enable pin. It is a 3-pin fixed-output regulator (IN, OUT, GND) without logic control. The LP2951-N family provides SHUTDOWN and ERROR pins, but LP2950CZ-5.0/LFT8 is functionally distinct and lacks those features.
Can LP2950CZ-5.0/LFT8 be used with ceramic output capacitors?
Yes, LP2950CZ-5.0/LFT8 is explicitly characterized for stability with low-ESR ceramic capacitors-minimum 1 µF X7R or X5R type is required. The datasheet confirms stable operation across 10 mΩ to 6 Ω ESR range, eliminating need for higher-ESR tantalum or aluminum electrolytic capacitors.
What is the thermal resistance (RθJA) of LP2950CZ-5.0/LFT8 in its TO-92 package?
The junction-to-ambient thermal resistance (RθJA) for LP2950CZ-5.0/LFT8 in the TO-92 (LP) package is 157.4°C/W, measured on a High-K test board per JESD51-7. This value assumes standard PCB copper area; actual thermal performance improves with added copper pour or thermal vias under the tab.
Is LP2950CZ-5.0/LFT8 suitable as a precision voltage reference?
Yes, LP2950CZ-5.0/LFT8 can serve as a low-power voltage reference due to its 0.5% typical initial tolerance, 0.05% typical line/load regulation, and 20 ppm/°C typical temperature coefficient-performance metrics aligned with reference-grade stability in commercial temperature range.
LP2950CZ-5.0/LFT8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
LP2950CZ-5.0/LFT8 FAQ
1.How can I place an order for LP2950CZ-5.0/LFT8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950CZ-5.0/LFT8 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 LP2950CZ-5.0/LFT8 reliable?
The price and inventory of LP2950CZ-5.0/LFT8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2950CZ-5.0/LFT8 is usually 5 days.
3.What payment methods are accepted for LP2950CZ-5.0/LFT8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950CZ-5.0/LFT8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950CZ-5.0/LFT8?
LP2950CZ-5.0/LFT8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950CZ-5.0/LFT8 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 LP2950CZ-5.0/LFT8?
For technical support, including LP2950CZ-5.0/LFT8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950CZ-5.0/LFT8 requirements.
6.How does Aetrix verify that LP2950CZ-5.0/LFT8 is sourced from the original manufacturer or authorized distributors?
All LP2950CZ-5.0/LFT8 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 LP2950CZ-5.0/LFT8 meets industry standards.
7.What is the process for return or replacement of LP2950CZ-5.0/LFT8?
All LP2950CZ-5.0/LFT8 units undergo pre-shipment inspection (PSI). If there is an issue with LP2950CZ-5.0/LFT8, 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 LP2950CZ-5.0/LFT8 part is unused and in its original packaging.
Return procedure for LP2950CZ-5.0/LFT8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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