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onsemi LP2950ACZ-3.0RAG
- Part No.:
- LP2950ACZ-3.0RAG
- Manufacturer:
- onsemi
- Package:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- Datasheet:
-
LP2950ACZ-3.0RAG.pdf
- Description:
- IC REG LINEAR 3V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
LP2950ACZ-3.0RAG from onsemi is a 3.0 V, ±0.5% tolerance, low-dropout linear voltage regulator in TO-92 package, delivering up to 100 mA with 380 mV dropout at full load, 75 µA quiescent current, and internal thermal/current limiting - ideal for battery-powered instrumentation and portable sensors.
For engineers reviewing the LP2950ACZ-3.0RAG datasheet, pinout, applications, or equivalent options, key selection criteria include output voltage precision, dropout behavior under 100 mA load, stability with 1.0 µF ceramic output capacitor, and TO-92 thermal performance in ambient temperatures from −40°C to +125°C.
Technical Context
This is a fixed-output, three-terminal LDO regulator using PNP pass transistor architecture. It operates without external feedback components and requires only a 1.0 µF output capacitor for stability across its full operating range (−40°C to +125°C).
Unlike the LP2951, it lacks error flag, shutdown input, or adjustable output capability - making it a simplified, cost-optimized variant optimized for space-constrained, low-power applications where regulation integrity and minimal BOM count are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±0.5% at TA = 25°C; maintains ±1.4% over −40°C to +125°C - enables direct replacement of legacy 3.0 V references in precision analog front-ends. |
| Max Output Current | 100 mA - sufficient to power microcontrollers (e.g., MSP430, STM32L0), I²C sensors, and RF transceivers (e.g., nRF52832) without external boost stages. |
| Dropout Voltage | 380 mV at 100 mA - allows operation from single-cell Li-ion (3.0–4.2 V) or two-cell alkaline (2.4–3.2 V) with >100 mV headroom at end-of-life. |
| Quiescent Current | 75 µA typical - extends battery life in always-on monitoring nodes (e.g., smoke detectors, asset trackers) by reducing standby power loss. |
| Stability Capacitor | 1.0 µF minimum ceramic or tantalum - eliminates need for large electrolytics; supports compact PCB layouts in wearables and medical patches. |
| Thermal Resistance | RJA = 160°C/W (TO-92) - limits max power dissipation to ~312 mW at TA = 85°C, requiring derating above 50 mA at elevated ambient. |
| Input Voltage Range | Up to 30 V DC - accommodates unregulated wall adapters (e.g., 9 V, 12 V) with simple resistive pre-drop or transient protection. |
Pinout & Package
LP2950ACZ-3.0RAG uses the TO-92 (Case 29-10) package with bent leads. The heatsink tab is not electrically isolated and connects internally to Pin 2 (Ground). Mounting requires clearance from adjacent traces to avoid shorting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Regulated 3.0 V supply rail; must be decoupled with ≥1.0 µF capacitor to ground for stability and transient response. |
| 2 | Ground | Reference node for both input and output; serves as thermal path and return for bias current; connects to heatsink surface. |
| 3 | Input | Unregulated DC input (up to 30 V); requires local 0.1–1.0 µF bypass capacitor if >4 inches from source to suppress high-frequency noise. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 380 mV @ 100 mA enables use with marginal input sources like aging batteries or low-headroom SMPS outputs. |
| High output accuracy | ±0.5% initial tolerance reduces need for post-production calibration in industrial sensor signal chains. |
| Ultra-low quiescent current | 75 µA supports multi-year operation on coin cells (e.g., CR2032) in IoT endpoint devices. |
| Single-capacitor stability | 1.0 µF output capacitor suffices - avoids complex compensation networks required by many LDOs. |
| Integrated protection | Internal current limit (~220–300 mA) and thermal shutdown prevent damage during short-circuit or overload events. |
Applications
| Portable Medical Sensors | Industrial Process Transmitters |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 3.0 V supply for ADC reference, op-amps, and BLE radio - maintaining stable rail during RF transmit bursts. Use Value: 75 µA quiescent current extends CR2032 battery life beyond 18 months; 380 mV dropout ensures regulation down to 3.38 V input at end-of-life. | Use Scenario: 4–20 mA loop-powered temperature transmitter in hazardous area enclosures. IC Role / Device Role / Timing Role: Local 3.0 V regulator for microcontroller and precision DAC - powered from loop-derived 12–24 V with no auxiliary supply. Use Value: ±0.5% output tolerance ensures <0.1% full-scale error in 16-bit DAC output; TO-92 package fits tight DIN-rail module footprints. |
| Smart Utility Meters | Automotive Body Control Modules |
Use Scenario: Battery-backed real-time clock and metrology IC in electricity meters with lithium-thionyl chloride backup. IC Role / Device Role / Timing Role: Standby regulator supplying RTC and SRAM during main power failure - activated only when AC line drops. Use Value: 3.0 V output matches standard RTC voltage requirements; 1.0 µF stability capacitor simplifies layout in constrained meter PCBs. | Use Scenario: Interior lighting control unit powered from vehicle battery (9–16 V) with cold-crank immunity. IC Role / Device Role / Timing Role: Secondary 3.0 V rail for CAN transceiver logic and LED driver ICs - operating through 6 V cold-crank dips. Use Value: 30 V absolute max input withstands load-dump transients; RJA = 160°C/W allows direct mounting on metal chassis for passive cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3002E/MB | 3.0 V ±1% tolerance, 250 mV dropout @ 250 mA, 1.6 µA quiescent current, SOT-23-3 package. | Lower IQ enables decade-long shelf life in remote sensors; higher dropout margin insufficient for sub-3.5 V inputs. | Select when ultra-low standby power dominates over output accuracy and thermal performance. |
| NCP1117ST30T3G | 3.0 V ±2% tolerance, 1.2 V dropout @ 800 mA, 6 mA quiescent current, SOT-223 package. | Higher current capacity suits motor drivers or displays; 6 mA IQ disqualifies for battery-only operation. | Select when >100 mA load or higher thermal mass (SOT-223) is required, and accuracy is secondary. |
Compared with MCP1700T-3002E/MB and NCP1117ST30T3G, LP2950ACZ-3.0RAG uniquely balances ±0.5% accuracy, 100 mA capability, and TO-92 manufacturability - making it optimal for cost-sensitive, medium-accuracy, battery-backed industrial modules where footprint and calibration overhead matter.
Availability
LP2950ACZ-3.0RAG is available at Aetrix Electronics and suitable for portable medical sensors, industrial process transmitters, smart utility meters, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LP2950ACZ-3.0RAG 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
LP2950ACZ-3.0RAG belongs to onsemi's micropower LDO regulator family, designed specifically for battery-powered equipment where extended runtime, small size, and high accuracy are essential - including handheld test instruments and wireless sensor nodes.
FAQ
What is the maximum input voltage rating for LP2950ACZ-3.0RAG?
The LP2950ACZ-3.0RAG has an absolute maximum input voltage of 30 V DC, with a peak transient rating of 32 V for durations under 300 ms. Operation above 30 V risks permanent damage. For sustained operation, design margins should keep input below 28 V to ensure reliability across temperature extremes and process variation.
Does LP2950ACZ-3.0RAG require an external capacitor for stability?
Yes - LP2950ACZ-3.0RAG requires a minimum 1.0 µF output capacitor connected between Pin 1 (Output) and Pin 2 (Ground) for guaranteed stability across all loads and temperatures. Aluminum, tantalum, or multilayer ceramic capacitors are acceptable; solid tantalum or X7R/X5R ceramics are recommended for operation below −25°C.
Can LP2950ACZ-3.0RAG be used in automotive applications?
LP2950ACZ-3.0RAG is rated for −40°C to +125°C ambient operation and meets RoHS/Pb-free requirements, but it is not AEC-Q100 qualified. For automotive applications requiring qualification, use the NCV2951ACZ-3.0RAG variant - which shares identical electrical specs but adds automotive-grade screening, PPAP documentation, and change control.
What is the dropout voltage of LP2950ACZ-3.0RAG at 50 mA load?
At 50 mA load and TA = 25°C, the dropout voltage of LP2950ACZ-3.0RAG is typically 220 mV (max 350 mV per datasheet). This allows reliable regulation from a 3.22 V input - critical for single-cell LiFePO₄ (2.5–3.65 V) or two-cell NiMH (2.4–3.0 V) systems near end-of-discharge.
Is LP2950ACZ-3.0RAG pin-compatible with other LP2950 variants?
Yes - all LP2950 variants in TO-92 (e.g., LP2950CZ-3.0RAG, LP2950ACZ-5.0RAG) share identical pinout (Pin 1 = Output, Pin 2 = Ground, Pin 3 = Input) and mechanical footprint. Swapping between voltage options or tolerance grades requires only BOM update - no PCB revision needed.
LP2950ACZ-3.0RAG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Long Body, Formed Leads
- 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):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 120 µA
- Current - Supply (Max):
- 12 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 (TO-226)
LP2950ACZ-3.0RAG FAQ
1.How can I place an order for LP2950ACZ-3.0RAG through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950ACZ-3.0RAG 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-3.0RAG reliable?
The price and inventory of LP2950ACZ-3.0RAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2950ACZ-3.0RAG is usually 5 days.
3.What payment methods are accepted for LP2950ACZ-3.0RAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950ACZ-3.0RAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950ACZ-3.0RAG?
LP2950ACZ-3.0RAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950ACZ-3.0RAG 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-3.0RAG?
For technical support, including LP2950ACZ-3.0RAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950ACZ-3.0RAG requirements.
6.How does Aetrix verify that LP2950ACZ-3.0RAG is sourced from the original manufacturer or authorized distributors?
All LP2950ACZ-3.0RAG 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-3.0RAG meets industry standards.
7.What is the process for return or replacement of LP2950ACZ-3.0RAG?
All LP2950ACZ-3.0RAG units undergo pre-shipment inspection (PSI). If there is an issue with LP2950ACZ-3.0RAG, 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-3.0RAG part is unused and in its original packaging.
Return procedure for LP2950ACZ-3.0RAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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