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Texas Instruments LP2950ACZ-5.0/LFT1
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- Part No.:
- LP2950ACZ-5.0/LFT1
- Manufacturer:
- Texas Instruments
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
LP2950ACZ-5.0/LFT1.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
LP2950ACZ-5.0/LFT1 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, 0.5% initial output voltage tolerance, and 75 µA typical quiescent current - optimized for battery-powered systems requiring stable, ultra-low-power regulation.
For engineers reviewing the LP2950ACZ-5.0/LFT1 datasheet, LP2950ACZ-5.0/LFT1 pinout, LP2950ACZ-5.0/LFT1 application, or LP2950ACZ-5.0/LFT1 equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative options - all grounded in TI's SNVS764Q production data sheet (Rev Q, Dec 2017).
Technical Context
The LP2950ACZ-5.0/LFT1 implements a PNP-based pass transistor architecture with internal 1.235 V reference, enabling fixed 5.0 V output without external feedback components. It operates across 2.3 V to 30 V input range and maintains regulation down to 5.04 V input at 100 mA load (380 mV dropout), with thermal shutdown and foldback current limiting.
Unlike the LP2951-N family, LP2950ACZ-5.0/LFT1 lacks shutdown, error flag, or programmable feedback pins - it is strictly a 3-pin regulator (IN, OUT, GND) with no logic control or monitoring interfaces. Its stability requires only 1 µF minimum ceramic output capacitance with ESR between 10 mΩ and 6 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.00 V ±0.5% (typical initial tolerance); ensures precision supply for microcontrollers and sensors without calibration. |
| Max Output Current | 100 mA continuous; sufficient for single-rail MCU, RTC, or analog front-end subsystems. |
| Dropout Voltage | 380 mV at 100 mA; enables operation from single Li-ion (3.0–3.6 V) with boost or dual-cell alkaline (3.0 V min) inputs. |
| Quiescent Current | 75 µA typical; extends battery life in always-on, low-duty-cycle applications like remote sensors. |
| Line Regulation | 0.03% typical (ΔVOUT/VOUT per ΔVIN); minimizes output drift across wide input variations (e.g., discharging battery). |
| Load Regulation | 0.04% typical (ΔVOUT/VOUT per 100 µA–100 mA load change); maintains accuracy under dynamic load switching. |
| Temp Coefficient | 20 ppm/°C typical; contributes <±1.2 mV drift over –40°C to +125°C junction range. |
Pinout & Package
LP2950ACZ-5.0/LFT1 is housed in a 3-pin TO-92 plastic package (body size 4.30 mm × 4.30 mm), compatible with legacy 5 V regulators and manual prototyping. Pinout follows standard TO-92 orientation (flat side facing viewer, leads down):
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Regulated output terminal | Delivers stable 5.0 V; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| 2 (GND) | Ground reference | Common return path for input/output currents; must be low-impedance connection to minimize noise coupling. |
| 3 (IN) | Unregulated input supply | Accepts 2.3 V–30 V; dropout behavior begins when VIN falls below VOUT + VDO (e.g., <5.38 V at 100 mA). |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V output | No external resistors needed - simplifies BOM and layout for cost-sensitive, space-constrained designs. |
| Low dropout at full load | 380 mV @ 100 mA enables use with marginal input sources (e.g., aging batteries or post-dropper supplies). |
| Ultra-low quiescent current | 75 µA typical preserves battery capacity in standby modes - critical for >1-year coin-cell operation. |
| Tight initial voltage tolerance | ±0.5% (typical) eliminates need for post-production trimming in precision analog or reference circuits. |
| Stable with low-ESR capacitors | Supports 10 mΩ–6 Ω ESR ceramics (e.g., X5R/X7R), avoiding costly tantalum or polymer alternatives. |
Applications
| Portable Medical Sensors | Industrial Remote I/O Modules |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell with 2.0–3.0 V discharge profile. IC Role / Device Role / Timing Role: Primary 5.0 V LDO supplying ADC, BLE SoC, and sensor interface - operating in dropout during end-of-life battery. Use Value: 380 mV dropout and 75 µA IQ enable >18-month runtime; ±0.5% output accuracy ensures calibrated sensor readings. |
Use Scenario: DIN-rail mounted temperature transmitter with 4–20 mA loop power and isolated 5 V digital supply. IC Role / Device Role / Timing Role: Local 5.0 V regulator for microcontroller and RS-485 transceiver, fed from auxiliary 12 V DC-DC converter. Use Value: 0.04% load regulation prevents communication errors during rapid load transients; TO-92 allows through-hole mounting on rugged PCBs. |
| Smart Utility Meters | Automotive Body Control Units |
|
Use Scenario: AMI meter with LCD, RF module, and metrology ASIC sharing single 3.6 V Li-SOCl₂ primary cell. IC Role / Device Role / Timing Role: Secondary 5.0 V rail generator for display driver IC and real-time clock, using boost + LDO architecture. Use Value: 20 ppm/°C tempco ensures timekeeping accuracy across –25°C to +70°C ambient; 1 µF stability requirement reduces bill-of-materials cost. |
Use Scenario: Door module with LED status indicators, window motor drivers, and LIN transceiver - powered from vehicle 12 V battery. IC Role / Device Role / Timing Role: Dedicated 5.0 V supply for LIN PHY and microcontroller core logic, decoupled from noisy motor switching noise. Use Value: 0.03% line regulation rejects battery ripple and load dump transients; TO-92 mechanical robustness withstands automotive vibration. |
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 |
|---|---|---|---|
| TLV70550DBVR | 200 mA rated, 25 µA IQ, SOT-23-5 package; includes enable pin and higher PSRR (70 dB @ 1 kHz). | Requires PCB redesign (5-pin vs 3-pin); better for noise-sensitive analog rails but adds complexity. | Select if higher current headroom or active enable control is required; not drop-in for TO-92 footprint. |
| AP2210K-5.0TRG1 | 150 mA rated, 50 µA IQ, SOT-23-3 package; ±2% output tolerance, no thermal shutdown. | Lacks overtemperature protection; tighter thermal design needed; lower accuracy impacts precision loads. | Choose for cost-driven consumer applications where ±2% output and absence of thermal shutdown are acceptable. |
Compared with TLV70550DBVR and AP2210K-5.0TRG1, LP2950ACZ-5.0/LFT1 offers superior initial accuracy (±0.5% vs ±2%) and integrated thermal shutdown, at the trade-off of higher quiescent current and TO-92-only packaging - making it optimal for legacy-compatible, precision battery-powered designs.
Availability
LP2950ACZ-5.0/LFT1 is available at Aetrix Electronics and suitable for portable medical sensors, industrial remote I/O modules, smart utility meters, and automotive body control units requiring stable component supply with long-term lifecycle support.
Supply support for LP2950ACZ-5.0/LFT1 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 delivering analog and embedded processing solutions, with over 90 years of innovation in power management ICs.
LP2950ACZ-5.0/LFT1 belongs to TI's LP295x-N micropower LDO family, designed specifically for ultra-low-power, high-accuracy regulation in battery-critical applications - emphasizing longevity, precision, and robustness over feature density.
FAQ
What is the maximum input voltage rating for LP2950ACZ-5.0/LFT1?
The absolute maximum input voltage for LP2950ACZ-5.0/LFT1 is 30 V, as specified in Section 7.1 of the TI SNVS764Q datasheet. Operation above this level risks permanent damage. For reliable long-term use, the recommended maximum is 30 V under normal conditions, with derating advised above 125°C junction temperature.
Does LP2950ACZ-5.0/LFT1 include thermal shutdown protection?
Yes, LP2950ACZ-5.0/LFT1 integrates thermal shutdown circuitry that disables the output when junction temperature exceeds ~150°C. This protection is documented in Section 8.3.6.2 and Table 7.1 of the SNVS764Q datasheet. Recovery occurs automatically once the die cools below the hysteresis threshold.
Can LP2950ACZ-5.0/LFT1 be used with ceramic output capacitors?
Yes - LP2950ACZ-5.0/LFT1 is explicitly characterized for stability with ceramic capacitors having ESR between 10 mΩ and 6 Ω. A minimum 1 µF X5R/X7R ceramic capacitor is required at the output, as confirmed in Section 9.1 and Figure 30 of the SNVS764Q datasheet.
What is the dropout voltage of LP2950ACZ-5.0/LFT1 at 100 mA load?
At 100 mA load and TJ = 25°C, LP2950ACZ-5.0/LFT1 exhibits a typical dropout voltage of 380 mV, meaning it regulates properly as long as VIN ≥ 5.38 V. This value rises to 600 mV over the full –40°C to +125°C temperature range, per Table 7.6 in the SNVS764Q datasheet.
Is LP2950ACZ-5.0/LFT1 pin-compatible with older 78L05 regulators?
Yes - LP2950ACZ-5.0/LFT1 uses the standard TO-92 package with identical pinout (IN-GND-OUT) and footprint as the LM78L05 and other legacy 3-pin 5 V regulators, enabling direct replacement in existing designs without layout changes.
LP2950ACZ-5.0/LFT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Tape & Reel (TR)
- 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, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LP2950ACZ-5.0/LFT1 FAQ
1.How can I place an order for LP2950ACZ-5.0/LFT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950ACZ-5.0/LFT1 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/LFT1 reliable?
The price and inventory of LP2950ACZ-5.0/LFT1 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/LFT1 is usually 5 days.
3.What payment methods are accepted for LP2950ACZ-5.0/LFT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950ACZ-5.0/LFT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950ACZ-5.0/LFT1?
LP2950ACZ-5.0/LFT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950ACZ-5.0/LFT1 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/LFT1?
For technical support, including LP2950ACZ-5.0/LFT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950ACZ-5.0/LFT1 requirements.
6.How does Aetrix verify that LP2950ACZ-5.0/LFT1 is sourced from the original manufacturer or authorized distributors?
All LP2950ACZ-5.0/LFT1 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/LFT1 meets industry standards.
7.What is the process for return or replacement of LP2950ACZ-5.0/LFT1?
All LP2950ACZ-5.0/LFT1 units undergo pre-shipment inspection (PSI). If there is an issue with LP2950ACZ-5.0/LFT1, 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/LFT1 part is unused and in its original packaging.
Return procedure for LP2950ACZ-5.0/LFT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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