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Microchip Technology LP2950-02BZ TR
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- Part No.:
- LP2950-02BZ TR
- Manufacturer:
- Microchip Technology
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
LP2950-02BZ TR.pdf
- Description:
- IC REG LINEAR 5V 100MA TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,504
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Product details
Overview
LP2950-02BZ TR from Micrel Inc. is a 5.0V, ±0.5% initial accuracy, 100mA low-dropout linear voltage regulator in a 3-pin TO-92 package, featuring 40mV typical dropout at light loads and 380mV at full load, 75µA typical quiescent current, and operation across –40°C to +125°C - widely used in battery-powered instrumentation and automotive sensor modules.
For engineers reviewing the LP2950-02BZ TR datasheet, LP2950-02BZ TR pinout, LP2950-02BZ TR application, or LP2950-02BZ TR equivalent, key selection criteria include guaranteed 100mA output under dropout conditions, tight 0.05% typical load regulation, ultra-low temperature coefficient (20 ppm/°C), and stability with only 1µF output capacitance - critical for space-constrained, long-life embedded systems.
Technical Context
The LP2950-02BZ TR implements a micropower bandgap reference-based control loop with internal pass transistor, delivering regulated 5.0V output without external feedback components. Its quiescent current rises only marginally in dropout, preserving battery runtime in low-VIN scenarios such as automotive cold-crank or industrial backup power.
Unlike the LP2951, it lacks shutdown, error flag, or programmable output - it is a fixed-output, 3-terminal regulator optimized for simplicity, reliability, and minimal BOM count in cost-sensitive, high-reliability applications where system-level supervision is handled externally.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±0.5% (guaranteed over –40°C to +125°C; enables precision analog supply without trimming) |
| Max Output Current | 100 mA (supports microcontrollers, sensors, and RF transceivers without thermal derating at ambient ≤60°C) |
| Dropout Voltage | 380 mV @ 100 mA (allows regulation down to VIN = 5.38 V; supports 6V nominal battery systems through discharge) |
| Quiescent Current | 75 µA typical (enables >1-year battery life in 10µA sleep-mode systems with coin-cell sources) |
| Load Regulation | 0.04% typical (±0.2 mV change from 100µA to 100mA load; maintains ADC reference stability) |
| Temp Coefficient | 20 ppm/°C (±1.25 mV drift over full temperature range; suitable as low-power voltage reference) |
| Stability Capacitor | 1 µF minimum (enables use of low-cost tantalum or aluminum electrolytics; no ceramic biasing concerns) |
Pinout & Package
LP2950-02BZ TR is housed in a standard 3-pin TO-92 plastic package (Z suffix), with leads arranged in bottom-view orientation: Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output. The package has a junction-to-ambient thermal resistance of 180°C/W (0.4″ leads) and is RoHS-compliant with standard lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Input) | Unregulated DC input supply | Accepts 5.4V–30V; must be ≥5.38V to sustain 5.0V/100mA output; requires 0.1µF bypass if >10″ wire length |
| Pin 2 (Ground) | Reference and return path | Low-impedance connection essential for load regulation accuracy; shares common ground with load and bypass caps |
| Pin 3 (Output) | Regulated 5.0V supply rail | Delivers up to 100mA; stable with ≥1µF output capacitor; remains in regulation even at zero load |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output with 0.5% tolerance | Eliminates external resistor network; reduces component count and layout area in space-constrained PCBs |
| Ultra-low 75µA quiescent current | Extends shelf life and operational runtime in always-on battery-powered devices such as smoke detectors and remote sensors |
| Stable with 1µF output capacitor | Supports low-ESR tantalum or aluminum electrolytics - avoids costly ceramic capacitors and associated DC-bias derating issues |
| 0.05% typical load regulation | Minimizes supply-induced errors in precision analog circuits like 12-bit ADCs and op-amp signal chains |
| Operates from –40°C to +125°C | Qualified for under-hood automotive, industrial control, and avionics environments without derating |
Applications
| Automotive Sensor Modules | Industrial Battery Backup Systems |
|---|---|
Use Scenario: Powering MEMS pressure and temperature sensors in engine control units under cold-crank (5.5V min) and hot-idle (14.5V max) conditions. IC Role / Device Role / Timing Role: Primary 5V LDO supplying analog front-end and microcontroller I/O rails. Use Value: Maintains regulation during 5.38V dropout threshold; 20 ppm/°C drift ensures <±3mV output shift across –40°C to +125°C engine bay operation. | Use Scenario: Providing clean 5V standby power to real-time clocks and SRAM in PLCs during AC mains failure. IC Role / Device Role / Timing Role: Always-on voltage regulator maintaining memory retention during extended brownout events. Use Value: 75µA quiescent current enables >3-year coin-cell lifetime; zero-load regulation prevents data loss when main system is powered off. |
| Avionics Cabin Monitoring | Portable Medical Diagnostics |
Use Scenario: Supplying low-noise 5V to cabin pressure and CO₂ sensor interfaces in certified airborne equipment. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric sensor excitation and ADC reference. Use Value: 0.04% load regulation and 430µV RMS noise (10Hz–100kHz) ensure <0.5 LSB error in 12-bit measurements. | Use Scenario: Regulating 5V for portable ECG front-end ICs and Bluetooth LE radios operating on single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Main system power regulator enabling continuous monitoring during battery discharge from 4.2V to 3.0V. Use Value: 380mV dropout allows usable runtime down to 3.38V input; TO-92 footprint simplifies manual rework in low-volume medical assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70033DCKR | 3.3V fixed output; 200mA rating; 300mV dropout @ 200mA; SOT-23-5 package; 50µA IQ | Not pin-compatible; requires PCB redesign; suited for newer 3.3V logic systems | Select only if migrating to 3.3V domain and requiring higher current or smaller footprint |
| MC78L05ACZ | 5V output; 100mA; 1.7V dropout @ 40mA; TO-92; 3.8mA IQ; no temp spec beyond 0°C–70°C | Higher dropout and quiescent current; narrower temp range; legacy design with looser tolerance (±5%) | Acceptable for non-automotive, commercial-grade cost-sensitive designs where battery life and wide-temp operation are not critical |
Compared with TLV70033DCKR and MC78L05ACZ, the LP2950-02BZ TR uniquely delivers 5.0V ±0.5% accuracy, 380mV dropout at 100mA, and full –40°C to +125°C qualification in the same TO-92 footprint - making it irreplaceable for legacy automotive and industrial designs requiring proven reliability and minimal bill-of-materials change.
Availability
LP2950-02BZ TR is available at Aetrix Electronics and suitable for automotive sensor modules, industrial battery backup systems, avionics cabin monitoring, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.
Supply support for LP2950-02BZ TR 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
Micrel Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The LP2950 product line was designed specifically for high-reliability, low-power linear regulation in harsh-environment applications - emphasizing ultra-low IQ, tight tolerance, and wide-temperature operation without external components.
FAQ
What is the maximum input voltage rating for LP2950-02BZ TR?
The LP2950-02BZ TR supports an absolute maximum input voltage of +30V. However, for reliable operation within specifications, the input should remain within 5.4V to 30V to maintain 5.0V regulation at full 100mA load. Exceeding 30V risks permanent damage per Absolute Maximum Ratings. The device includes no reverse-polarity or transient protection - external TVS or series diode is required in noisy automotive or industrial environments. LP2950-02BZ TR must never be operated above 30V, even momentarily.
Does LP2950-02BZ TR require an output capacitor, and what type is recommended?
Yes, LP2950-02BZ TR requires a minimum 1.0µF output capacitor between VOUT and GND for stability. Solid tantalum or aluminum electrolytic capacitors are recommended - they provide sufficient ESR (≤5Ω) and resonant frequency (>500kHz) to prevent oscillation. Ceramic capacitors are not recommended unless series resistance is added, due to their near-zero ESR. For operation below –25°C, solid tantalum is preferred over aluminum electrolytics, which may freeze. LP2950-02BZ TR remains stable even with no load, unlike many regulators.
Is LP2950-02BZ TR pin-compatible with older 78L05-style regulators?
Yes, LP2950-02BZ TR uses the same TO-92 pinout (Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output) as the LM78L05 and MC78L05ACZ, enabling direct replacement in existing layouts. However, unlike those legacy parts, LP2950-02BZ TR offers significantly lower dropout (380mV vs. ~1.7V), tighter accuracy (±0.5% vs. ±5%), and ultra-low quiescent current (75µA vs. ~3.8mA). LP2950-02BZ TR does not require input bypassing for basic operation but benefits from a 0.1µF cap if input wiring exceeds 10 inches.
What is the thermal performance of LP2950-02BZ TR in TO-92 package?
LP2950-02BZ TR in TO-92 (Z) package has a junction-to-ambient thermal resistance of 180°C/W with 0.4″ leads soldered to a PCB. At 100mA load and 5.38V input (380mV dropout), power dissipation is 38mW - resulting in only ~6.8°C junction rise above ambient. This enables full-rated operation up to +60°C ambient without heatsinking. Derating begins above that point; maximum junction temperature remains 125°C. LP2950-02BZ TR is not rated for surface-mount thermal pads or forced-air cooling - its TO-92 form factor assumes natural convection only.
Can LP2950-02BZ TR be used as a precision voltage reference?
Yes, LP2950-02BZ TR is explicitly specified for use as a low-power voltage reference due to its 20 ppm/°C output voltage temperature coefficient, 0.05% typical load regulation, and 0.5% initial accuracy. When operated at light load (<1mA) and with proper decoupling, its 5.000V output drifts less than ±1.25mV from –40°C to +125°C. It requires no external components - unlike bandgap references needing biasing - and draws only 75µA. LP2950-02BZ TR is commonly used as a reference for 12-bit ADCs and analog comparators in battery-powered instrumentation.
LP2950-02BZ TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- 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):
- 150 µA
- Current - Supply (Max):
- 14 mA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
LP2950-02BZ TR FAQ
1.How can I place an order for LP2950-02BZ TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2950-02BZ TR 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 LP2950-02BZ TR reliable?
The price and inventory of LP2950-02BZ TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2950-02BZ TR is usually 5 days.
3.What payment methods are accepted for LP2950-02BZ TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2950-02BZ TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2950-02BZ TR?
LP2950-02BZ TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2950-02BZ TR 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 LP2950-02BZ TR?
For technical support, including LP2950-02BZ TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2950-02BZ TR requirements.
6.How does Aetrix verify that LP2950-02BZ TR is sourced from the original manufacturer or authorized distributors?
All LP2950-02BZ TR 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 LP2950-02BZ TR meets industry standards.
7.What is the process for return or replacement of LP2950-02BZ TR?
All LP2950-02BZ TR units undergo pre-shipment inspection (PSI). If there is an issue with LP2950-02BZ TR, 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 LP2950-02BZ TR part is unused and in its original packaging.
Return procedure for LP2950-02BZ TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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