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onsemi LP2950ACDT-3.0G
- Part No.:
- LP2950ACDT-3.0G
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
LP2950ACDT-3.0G.pdf
- Description:
- IC REG LINEAR 3V 100MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:4,175
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Product details
Overview
LP2950ACDT-3.0G from onsemi is a 3.0 V, ±0.5% initial tolerance, low-dropout linear voltage regulator in DPAK (TO-252) package, delivering up to 100 mA with 380 mV dropout at full load and 75 µA quiescent current - ideal for battery-powered industrial sensors and portable instrumentation requiring stable 3.0 V rail under varying input conditions.
For engineers reviewing the LP2950ACDT-3.0G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 100 mA, thermal resistance (RJA = 92 °C/W), output voltage precision over −40°C to +125°C, stability with 1.0 µF ceramic output capacitor, and compatibility with unregulated inputs up to 30 V.
Technical Context
The LP2950ACDT-3.0G uses a PNP pass transistor architecture enabling ultra-low dropout operation without external compensation. Its internal 1.235 V reference and error amplifier maintain regulation with input-to-output differentials as low as 350 mV at 100 mA while rejecting line and load variations with 0.04% typical line regulation and 0.05% load regulation.
Designed for standalone fixed-voltage regulation, it lacks shutdown, error flag, or adjustable feedback pins - distinguishing it from the LP2951 family. Thermal protection and current limiting are fully integrated, and operation is stable with ≥1.0 µF output capacitance across aluminum, tantalum, or multilayer ceramic types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V ±0.5% at TA = 25°C; ±0.42% over −40°C to +125°C - ensures precise biasing for ADC references and microcontroller I/O rails. |
| Max Output Current | 100 mA - sufficient for low-power MCUs, analog front-ends, and sensor signal chains without external boost stages. |
| Dropout Voltage | 350 mV (typ) at 100 mA - enables regulation from 3.35 V input, critical for single-cell Li-ion or 4-cell alkaline systems. |
| Quiescent Current | 75 µA (typ) - extends battery life in always-on monitoring devices; increases to 4.0 mA only under full 100 mA load. |
| Line Regulation | 0.04% (typ) - minimizes output drift when input varies from 4.0 V to 30 V, supporting wide-input industrial power supplies. |
| Load Regulation | 0.05% (typ) - maintains tight voltage control across 100 µA–100 mA load range, essential for precision analog circuits. |
| Thermal Resistance | RJA = 92 °C/W (DPAK) - allows ~1.1 W max dissipation at TA = 75°C with standard PCB copper, enabling compact thermal design. |
| Stability Capacitor | 1.0 µF minimum ceramic - eliminates need for complex compensation networks; supports small-footprint, low-BOM-count designs. |
Pinout & Package
DPAK (TO-252) package with exposed thermal pad connected to Pin 2 (Ground); heatsink surface electrically tied to GND for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Unregulated DC input (up to 30 V); requires local 0.1–1.0 µF bypass capacitor if >4 inches from source. |
| 2 | Ground | Power and thermal reference node; must be connected to large copper pour for heat dissipation and noise immunity. |
| 3 | Output | Regulated 3.0 V output; connects directly to load and 1.0 µF output capacitor; no feedback or sense pin required. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout at full load | 350 mV typ at 100 mA enables operation from marginal input sources like aging batteries or loosely regulated supplies. |
| Ultra-low quiescent current | 75 µA typ preserves battery capacity in sleep-mode applications such as wireless sensor nodes and IoT edge devices. |
| Tight output voltage tolerance | ±0.5% initial accuracy reduces need for post-production calibration in precision analog and data acquisition systems. |
| Integrated protection | Internal current limit (~220–300 mA) and thermal shutdown prevent damage during fault conditions without external circuitry. |
| Single-capacitor stability | Guaranteed stability with 1.0 µF ceramic output capacitor simplifies layout and lowers BOM cost versus compensated regulators. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via BLE every 5 seconds. IC Role / Device Role / Timing Role: Primary 3.0 V supply for MCU, sensor IC, and RF transceiver; regulates voltage during battery discharge from 4.2 V to 3.3 V. Use Value: 350 mV dropout ensures continuous regulation down to 3.35 V input, extending usable battery life by >18% vs. standard LDOs. | Use Scenario: Handheld pulse oximeter using AAA alkaline cells with variable load from LED drivers and analog front-end. IC Role / Device Role / Timing Role: Stable 3.0 V rail for ADC reference, op-amps, and low-power display controller; rejects ripple from switching LED current sources. Use Value: 0.05% load regulation prevents measurement offset drift when LED pulses draw transient 50 mA peaks. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Low-power wake-up circuit in door module monitoring window switch status with CAN bus interface. IC Role / Device Role / Timing Role: Always-on 3.0 V supply for real-time clock and CAN transceiver standby logic; operates from 9–16 V vehicle battery via pre-regulator. Use Value: −40°C to +125°C operating range and AEC-Q100 qualified alternatives ensure reliability in under-hood environments. | Use Scenario: Tamper-resistant electricity meter with isolated RS-485 interface and metrology ASIC powered from 3.3 V rail derived from 24 V AC/DC converter. IC Role / Device Role / Timing Role: Secondary 3.0 V regulator for isolation barrier driver and secure element; rejects conducted noise from SMPS primary side. Use Value: 92 °C/W thermal resistance allows full 100 mA load in sealed enclosure without heatsink, reducing bill-of-materials cost. |
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 |
|---|---|---|---|
| LP2950CDT-3.0RKG | 1.0% initial output tolerance (vs. 0.5%); same DPAK package, pinout, and electrical specs otherwise. | Suitable where ±1.0% output accuracy meets system requirements (e.g., non-precision digital logic rails). | Select LP2950CDT-3.0RKG for cost-sensitive designs where tighter voltage tolerance is not required. |
| NCV2950ACDT-3.0RKG | AEC-Q100 qualified, automotive-grade variant with same 0.5% tolerance and DPAK package; enhanced process controls and PPAP support. | Required for automotive body electronics, infotainment power rails, or industrial equipment needing automotive qualification. | Choose NCV2950ACDT-3.0RKG when automotive qualification, extended temperature validation, or change control is mandated. |
Compared with LP2950CDT-3.0RKG, the LP2950ACDT-3.0G delivers higher initial accuracy for precision analog subsystems; compared with NCV2950ACDT-3.0RKG, it offers identical electrical performance but without automotive qualification overhead - making it optimal for industrial and medical applications where cost and qualification alignment matter.
Availability
LP2950ACDT-3.0G is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for LP2950ACDT-3.0G 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The LP2950 family was designed specifically for battery-powered and low-power embedded systems requiring micropower operation, ultra-low dropout, and high accuracy - targeting applications where extended runtime and stable voltage references are critical.
FAQ
What is the maximum input voltage rating for the LP2950ACDT-3.0G?
The LP2950ACDT-3.0G 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 reliable long-term use, keep steady-state input below 28 V to maintain safe junction temperature margins, especially at high ambient temperatures or full 100 mA load.
Does the LP2950ACDT-3.0G require an external capacitor for stability?
Yes, the LP2950ACDT-3.0G requires a minimum 1.0 µF output capacitor connected between the Output (Pin 3) and Ground (Pin 2) for guaranteed stability across all operating conditions. Solid tantalum or multilayer ceramic capacitors are recommended; aluminum electrolytics may be used but require verification of ESR range per Figure 17 in the datasheet.
What is the dropout voltage of the LP2950ACDT-3.0G at 50 mA load?
At 50 mA load and TA = 25°C, the LP2950ACDT-3.0G exhibits a typical dropout voltage of approximately 250 mV, with a maximum of 350 mV. This value scales near-linearly with load current - e.g., ~125 mV at 25 mA - enabling efficient operation even at partial loads in duty-cycled systems.
Can the LP2950ACDT-3.0G be used in automotive applications?
The LP2950ACDT-3.0G itself is not AEC-Q100 qualified. However, its automotive-grade counterpart - the NCV2950ACDT-3.0RKG - shares identical electrical specifications and DPAK packaging but includes automotive process controls, extended temperature validation, and PPAP documentation support required for vehicle systems.
How does the LP2950ACDT-3.0G handle thermal overload?
The LP2950ACDT-3.0G incorporates internal thermal shutdown that activates when die junction temperature exceeds +150°C. Once triggered, the output disables until junction temperature falls below ~135°C, then automatically resumes regulation. This protects against sustained overloads or inadequate PCB copper area, and no external reset is needed.
LP2950ACDT-3.0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tube
- 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):
- 0.45V @ 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:
- Surface Mount
- Supplier Device Package:
- DPAK
LP2950ACDT-3.0G FAQ
1.How can I place an order for LP2950ACDT-3.0G through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950ACDT-3.0G 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 LP2950ACDT-3.0G reliable?
The price and inventory of LP2950ACDT-3.0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2950ACDT-3.0G is usually 5 days.
3.What payment methods are accepted for LP2950ACDT-3.0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950ACDT-3.0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950ACDT-3.0G?
LP2950ACDT-3.0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950ACDT-3.0G 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 LP2950ACDT-3.0G?
For technical support, including LP2950ACDT-3.0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950ACDT-3.0G requirements.
6.How does Aetrix verify that LP2950ACDT-3.0G is sourced from the original manufacturer or authorized distributors?
All LP2950ACDT-3.0G 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 LP2950ACDT-3.0G meets industry standards.
7.What is the process for return or replacement of LP2950ACDT-3.0G?
All LP2950ACDT-3.0G units undergo pre-shipment inspection (PSI). If there is an issue with LP2950ACDT-3.0G, 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 LP2950ACDT-3.0G part is unused and in its original packaging.
Return procedure for LP2950ACDT-3.0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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