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Texas Instruments LP2950CZ-5.0
- Part No.:
- LP2950CZ-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LP2950CZ-5.0.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,923
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Product details
Overview
LP2950CZ-5.0 from Texas Instruments is a fixed-output 5.0 V, 100 mA micropower low-dropout (LDO) linear voltage regulator in TO-92 package, featuring 40 mV typical dropout at light load, 75 µA typical quiescent current, and ±0.5% output voltage accuracy at 25°C - designed for battery-powered systems requiring stable, ultra-low-power regulation.
For engineers reviewing the LP2950CZ-5.0 datasheet, LP2950CZ-5.0 pinout, LP2950CZ-5.0 application, or LP2950CZ-5.0 equivalent, key selection criteria include dropout performance under 100 mA load, thermal behavior in TO-92, stability with 1 µF input/2.2 µF output capacitors, and compatibility with legacy 5 V regulator footprints.
Technical Context
The LP2950CZ-5.0 implements a PNP-based pass transistor architecture enabling ultra-low quiescent current that increases only slightly in dropout - critical for extending battery life. It integrates a precision 1.235 V bandgap reference with <20 ppm/°C temperature coefficient and achieves 0.05% typical line/load regulation via high-gain error amplifier feedback.
No shutdown or error flag functionality is present; this is a 3-pin fixed-voltage variant distinct from the 8-pin LP2951-N family. Its internal foldback current limit (160–200 mA) and thermal shutdown protect against overload while maintaining operation down to 2.3 V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±0.5% (typical) at 25°C - ensures stable MCU core or sensor supply without external trimming |
| Max Output Current | 100 mA - sufficient for microcontrollers, analog sensors, and low-power logic rails |
| Dropout Voltage | 380 mV at 100 mA - enables regulation from 5.38 V input, supporting single-cell LiFePO₄ or dual-cell alkaline |
| Quiescent Current | 75 µA typical - draws <1 µA/hour from coin cell, enabling multi-year standby in IoT endpoints |
| Line Regulation | 0.03% typical - maintains output within ±1.5 mV over 6–30 V input range, reducing need for upstream filtering |
| Load Regulation | 0.04% typical - holds output within ±2 mV across 100 µA to 100 mA load, suitable for variable-duty-cycle loads |
| Temp Coefficient | 20 ppm/°C - contributes <±15 mV drift over –40°C to +125°C, meeting industrial-grade reference stability |
Pinout & Package
LP2950CZ-5.0 uses the 3-pin TO-92 (LP) package (4.30 mm × 4.30 mm), pin-compatible with legacy 78L05 regulators and optimized for through-hole prototyping and low-cost consumer PCBs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output terminal | Delivers stable 5.0 V; requires 2.2 µF low-ESR capacitor (10–6000 mΩ) for stability |
| 2 (GND) | Ground reference | Common return path for input/output currents; must be low-impedance to minimize noise coupling |
| 3 (IN) | Unregulated input supply | Accepts 2.3 V to 30 V; minimum headroom = 380 mV @ 100 mA for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 75 µA quiescent current - extends shelf life of battery-powered devices beyond 5 years on CR2032 |
| Low dropout | 40 mV typical at 100 µA load - supports regulation from near-dead batteries (e.g., 4.9 V alkaline) |
| High DC accuracy | ±0.5% initial tolerance - eliminates need for post-production calibration in metering or sensing circuits |
| Thermal & current protection | Foldback current limit (160–200 mA) and thermal shutdown - prevents damage during short-circuit or overheating |
| Capacitor flexibility | Stable with 1 µF input / 2.2 µF output ceramic or tantalum - reduces BOM count vs. electrolytic-dependent LDOs |
Applications
| Portable Medical Sensors | Industrial Control I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with BLE radio operating from two AA alkaline cells. IC Role / Device Role / Timing Role: Primary 5 V rail regulator for ADC, op-amps, and microcontroller core. Use Value: 75 µA quiescent current enables >3-year battery life; 380 mV dropout allows operation until cell voltage drops to 5.38 V. |
Use Scenario: DIN-rail mounted PLC digital input module powered by 24 VDC field supply. IC Role / Device Role / Timing Role: Local 5 V supply for optocoupler interface and status LED drivers. Use Value: ±0.5% output accuracy ensures consistent LED brightness and opto threshold margin across temperature. |
| Smart Utility Meters | Automotive Body Electronics |
Use Scenario: AMI electricity meter with real-time clock, LCD, and RF mesh transceiver. IC Role / Device Role / Timing Role: Backup 5 V regulator fed from supercapacitor during main power loss. Use Value: Low dropout preserves regulation during brownout; 20 ppm/°C tempco maintains RTC accuracy over –25°C to +70°C. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting. IC Role / Device Role / Timing Role: Secondary 5 V supply for microcontroller and CAN transceiver logic. Use Value: 100 mA output supports simultaneous actuator drive; thermal shutdown prevents latch-up during motor stall events. |
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, 30 µA IQ, SOT-23-5 package | Requires redesign for 3.3 V systems; lacks TO-92 footprint compatibility | Select when lower quiescent current and higher current are prioritized over mechanical compatibility |
| MC78L05ACZ | 5 V fixed output, 100 mA, 6.5 mA IQ, TO-92 package, 2 V dropout | Higher dropout (2 V) and quiescent current limits battery runtime and low-input operation | Choose only for cost-sensitive, non-battery applications where thermal margin is ample |
Compared with TLV70033DCKR and MC78L05ACZ, the LP2950CZ-5.0 uniquely balances ultra-low IQ (75 µA), low dropout (380 mV), TO-92 pin compatibility, and ±0.5% accuracy - making it optimal for space-constrained, long-life battery systems where legacy footprint retention matters.
Availability
LP2950CZ-5.0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial control I/O modules, smart utility meters, and automotive body electronics requiring stable component supply with long-term manufacturability.
Supply support for LP2950CZ-5.0 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LP2950-N series was designed specifically for micropower, low-dropout regulation in battery-powered instrumentation and portable equipment - emphasizing accuracy, thermal robustness, and minimal external component count.
FAQ
What is the maximum input voltage rating for LP2950CZ-5.0?
The LP2950CZ-5.0 has an absolute maximum input voltage of 30 V. Operation is specified up to 30 V, but recommended continuous input is ≤30 V with proper thermal management. Exceeding this may cause permanent damage per Absolute Maximum Ratings in the TI SNVS764Q datasheet.
Does LP2950CZ-5.0 support shutdown or enable functionality?
No, LP2950CZ-5.0 does not include shutdown or enable functionality. It is a 3-pin fixed-output variant; shutdown and error flag features are exclusive to the 8-pin LP2951-N family. The LP2950CZ-5.0 remains active whenever input voltage exceeds 2.3 V and thermal limits are not exceeded.
What output capacitor value and type are required for LP2950CZ-5.0 stability?
LP2950CZ-5.0 requires a minimum 2.2 µF output capacitor with ESR between 10 mΩ and 6 Ω. Ceramic (X7R/X5R), tantalum, or aluminum polymer capacitors meet this; standard aluminum electrolytics often exceed ESR limits and risk instability.
Can LP2950CZ-5.0 be used as a precision voltage reference?
Yes, LP2950CZ-5.0 can serve as a low-power voltage reference due to its 0.5% initial accuracy, 0.05% line/load regulation, and 20 ppm/°C temperature coefficient. Its 5.0 V output is stable enough for 10-bit ADC references or calibration circuits where 25 mV total error budget is acceptable.
Is LP2950CZ-5.0 pin-compatible with older 78L05 regulators?
Yes, LP2950CZ-5.0 uses the same TO-92 (LP) package and pinout (IN-GND-OUT) as the 78L05, enabling direct replacement in existing designs. However, its lower dropout (380 mV vs. ~1.7 V) and micropower operation (75 µA vs. ~5.5 mA) deliver superior efficiency and extended battery life without layout changes.
LP2950CZ-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Box
- 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 FAQ
1.How can I place an order for LP2950CZ-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950CZ-5.0 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 reliable?
The price and inventory of LP2950CZ-5.0 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 is usually 5 days.
3.What payment methods are accepted for LP2950CZ-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950CZ-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950CZ-5.0?
LP2950CZ-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950CZ-5.0 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?
For technical support, including LP2950CZ-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950CZ-5.0 requirements.
6.How does Aetrix verify that LP2950CZ-5.0 is sourced from the original manufacturer or authorized distributors?
All LP2950CZ-5.0 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 meets industry standards.
7.What is the process for return or replacement of LP2950CZ-5.0?
All LP2950CZ-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LP2950CZ-5.0, 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 part is unused and in its original packaging.
Return procedure for LP2950CZ-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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