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Texas Instruments LP2950CZ-3.0/LFT3
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- Part No.:
- LP2950CZ-3.0/LFT3
- Manufacturer:
- Texas Instruments
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LP2950CZ-3.0/LFT3.pdf
- Description:
- IC REG LINEAR 3V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,534
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Product details
Overview
LP2950CZ-3.0/LFT3 from Texas Instruments is a fixed-output 3.0 V, 100 mA micropower low-dropout (LDO) linear voltage regulator in TO-92 package, featuring 0.5% initial output voltage tolerance, 40 mV typical dropout at 100 µA load, and 75 µA typical quiescent current - optimized for battery-powered instrumentation and portable sensors requiring stable 3 V supply under light-to-moderate load.
For engineers reviewing the LP2950CZ-3.0/LFT3 datasheet, LP2950CZ-3.0/LFT3 pinout, LP2950CZ-3.0/LFT3 application, or LP2950CZ-3.0/LFT3 equivalent, key selection criteria include guaranteed 100 mA output current, ±1% output voltage accuracy over temperature, stability with 1 µF input and 2.2 µF output ceramic capacitors, and compatibility with 2.3 V to 30 V input range - critical for long-life coin-cell and Li-ion backup systems.
Technical Context
The LP2950CZ-3.0/LFT3 implements a PNP-based pass transistor architecture with internal 1.235 V bandgap reference, enabling ultra-low quiescent current that rises only marginally in dropout - preserving battery runtime. Its error amplifier achieves 0.05% typical line and load regulation via high-loop-gain compensation.
No shutdown or error flag functionality is present; this is a 3-pin fixed-voltage variant (IN, GND, OUT), distinct from the 8-pin LP2951-N family. Thermal protection and foldback current limiting are integrated, with junction temperature limited to 125°C for industrial operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±1% over full operating temperature (−40°C to +125°C) - ensures reliable logic-level compliance for 3 V microcontrollers and analog front-ends. |
| Max Output Current | 100 mA - sufficient for powering low-power MCUs, RTCs, and sensor signal chains without external boost stages. |
| Dropout Voltage | 380 mV at 100 mA load - enables regulation down to VIN = 3.38 V, supporting single-cell LiFePO₄ or dual-cell alkaline inputs. |
| Quiescent Current | 75 µA typical - extends shelf life of battery-backed systems; increases only slightly in dropout mode. |
| Input Voltage Range | 2.3 V to 30 V - accommodates wide input sources including unregulated wall adapters, automotive transients, and multi-cell batteries. |
| Output Voltage Tempco | 20–120 ppm/°C - maintains <±3 mV drift across −40°C to +85°C, suitable for precision reference applications. |
| Stability Capacitors | 1 µF input + 2.2 µF output (low-ESR ceramic) - eliminates need for electrolytic or tantalum, reducing board area and cost. |
Pinout & Package
LP2950CZ-3.0/LFT3 is housed in a 3-pin TO-92 plastic package (body size 4.30 mm × 4.30 mm), with leads arranged in standard emitter-collector-base order for legacy compatibility.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output terminal | Delivers stable 3.0 V; requires 2.2 µF ceramic capacitor to ground for loop stability and transient response. |
| 2 (GND) | Ground reference | Common return path for input, output, and internal bias; must be low-impedance connection to minimize noise coupling. |
| 3 (IN) | Unregulated input supply | Accepts 2.3–30 V; requires 1 µF ceramic capacitor close to pin to suppress high-frequency ripple and PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0 V output | Factory-trimmed, no external resistors needed - simplifies BOM and layout for dedicated 3 V rail generation. |
| Low dropout at light loads | 40 mV typical at 100 µA - enables operation with <3.04 V input, ideal for end-of-life battery detection circuits. |
| High accuracy regulation | 0.5% typical initial tolerance + 0.05% line/load regulation - reduces need for post-regulation trimming in precision analog systems. |
| Thermal & current protection | Foldback current limit + thermal shutdown - prevents damage during short-circuit or overload without external circuitry. |
| Reference-grade stability | 20 ppm/°C tempco + 0.05% load regulation - allows use as a low-power voltage reference in ADC biasing or sensor excitation. |
Applications
| Portable Medical Sensors | Industrial RTU Power Supply |
|---|---|
|
Use Scenario: Continuous glucose monitor (CGM) using coin-cell battery with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 3 V LDO supplying MCU, BLE radio, and electrochemical sensor interface. Use Value: 75 µA quiescent current and 40 mV dropout extend usable battery life by >25% compared to standard LDOs at end-of-discharge. |
Use Scenario: Remote telemetry unit in oil-field monitoring, operating from 12 V solar-charged lead-acid battery. IC Role / Device Role / Timing Role: Local 3 V rail generator for RS-485 transceiver, microcontroller, and EEPROM. Use Value: 30 V max input rating and thermal protection ensure robustness against load-dump transients and ambient temperatures up to +85°C. |
| Smart Meter Backup Power | IoT Edge Node Regulator |
|
Use Scenario: Electricity meter retaining time/date and tamper logs during main AC failure using supercapacitor backup. IC Role / Device Role / Timing Role: Low-quiescent 3 V regulator sustaining RTC and SRAM during brownout. Use Value: Stable 3.0 V ±1% output guarantees accurate timekeeping and data integrity even as supercap voltage decays from 5.5 V to 2.8 V. |
Use Scenario: Battery-powered environmental sensor node transmitting temperature/humidity via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: Main power regulator for ultra-low-power MCU, sensor ICs, and RF transceiver during active burst. Use Value: 1 µF/2.2 µF ceramic capacitor support enables compact 2-layer PCB design with no tantalum or electrolytic components. |
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 |
|---|---|---|---|
| MCP1700-3002E/TO | 300 mA rated, 1.6 µA quiescent current, but 600 mV dropout at 250 mA - higher IQ not beneficial below 10 µA load. | Lacks thermal/current protection; requires external diode for reverse-input protection. | Prefer for ultra-low-IQ sleep-mode systems where peak load exceeds 100 mA. |
| NCP1117ST33T3G | 800 mA rated, 6 mA quiescent current, 1.2 V dropout - significantly higher static power and lower efficiency in battery systems. | SO-8 package only; no TO-92 option - incompatible with legacy through-hole layouts. | Choose only when higher output current and SOIC footprint are required; avoid for coin-cell or energy-harvesting designs. |
Compared with MCP1700-3002E/TO and NCP1117ST33T3G, LP2950CZ-3.0/LFT3 delivers optimal balance of ultra-low quiescent current, tight 3.0 V accuracy, TO-92 compatibility, and integrated protection - making it uniquely suited for space-constrained, long-life battery applications where 100 mA suffices.
Availability
LP2950CZ-3.0/LFT3 is available at Aetrix Electronics and suitable for portable medical devices, industrial telemetry units, smart meter backup systems, and IoT edge nodes requiring stable component supply with consistent parametric performance across production lots.
Supply support for LP2950CZ-3.0/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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision power management ICs.
LP2950CZ-3.0/LFT3 belongs to TI's LP295x-N series of micropower LDO regulators, designed specifically for battery longevity and accuracy-critical applications in portable, industrial, and metering equipment.
FAQ
What is the maximum input voltage rating for LP2950CZ-3.0/LFT3?
The LP2950CZ-3.0/LFT3 supports an absolute maximum input voltage of 30 V, with recommended operation up to 30 V. This allows direct use with unregulated 24 V industrial supplies or automotive battery systems with transient suppression, while maintaining safe thermal margins in the TO-92 package.
Does LP2950CZ-3.0/LFT3 include shutdown or error flag functionality?
No, LP2950CZ-3.0/LFT3 is a 3-pin fixed-output variant without SHUTDOWN or ERROR pins. These features exist only on the 8-pin LP2951-N family. LP2950CZ-3.0/LFT3 operates continuously when powered - appropriate for always-on sensing or timing applications where simplicity and minimal pin count are priorities.
What output capacitor value is required for stable operation of LP2950CZ-3.0/LFT3?
LP2950CZ-3.0/LFT3 requires a minimum 2.2 µF ceramic output capacitor (X5R/X7R, ≤10 mΩ ESR) placed adjacent to the OUT and GND pins. This value ensures phase margin >45° and prevents oscillation across temperature and load conditions - verified per TI SNVS764Q datasheet Figure 30.
Can LP2950CZ-3.0/LFT3 be used as a precision voltage reference?
Yes, LP2950CZ-3.0/LFT3 can serve as a low-power reference due to its 0.5% initial tolerance, 0.05% load regulation, and 20 ppm/°C temperature coefficient. When operated at light load (<1 mA) with proper bypassing, it delivers reference-grade stability - confirmed in LP2950-N datasheet Section 3 and Figure 5.
Is LP2950CZ-3.0/LFT3 RoHS-compliant and halogen-free?
Yes, LP2950CZ-3.0/LFT3 is RoHS-compliant and halogen-free per TI's official product change notification (PCN) SNVA772 and packaging specification for TO-92 devices. The "LFT3" suffix denotes lead-free, green (halogen-free) packaging compliant with JEDEC J-STD-609A Class 1.
LP2950CZ-3.0/LFT3 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):
- 3V
- 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-3.0/LFT3 FAQ
1.How can I place an order for LP2950CZ-3.0/LFT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950CZ-3.0/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 LP2950CZ-3.0/LFT3 reliable?
The price and inventory of LP2950CZ-3.0/LFT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2950CZ-3.0/LFT3 is usually 5 days.
3.What payment methods are accepted for LP2950CZ-3.0/LFT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950CZ-3.0/LFT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950CZ-3.0/LFT3?
LP2950CZ-3.0/LFT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950CZ-3.0/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 LP2950CZ-3.0/LFT3?
For technical support, including LP2950CZ-3.0/LFT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950CZ-3.0/LFT3 requirements.
6.How does Aetrix verify that LP2950CZ-3.0/LFT3 is sourced from the original manufacturer or authorized distributors?
All LP2950CZ-3.0/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 LP2950CZ-3.0/LFT3 meets industry standards.
7.What is the process for return or replacement of LP2950CZ-3.0/LFT3?
All LP2950CZ-3.0/LFT3 units undergo pre-shipment inspection (PSI). If there is an issue with LP2950CZ-3.0/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 LP2950CZ-3.0/LFT3 part is unused and in its original packaging.
Return procedure for LP2950CZ-3.0/LFT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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