My Inquiry
My Account
Microchip Technology LP2951-02BM-TR
- Part No.:
- LP2951-02BM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2951-02BM-TR.pdf
- Description:
- IC REG LIN POS ADJ 100MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,869
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP2951-02BM-TR from Microchip Technology is a micropower, low-dropout linear voltage regulator with fixed 5 V output, ±0.5% initial accuracy, 100 mA output capability, and 75 μA typical quiescent current - designed for battery-powered automotive and avionics systems requiring stable reference-grade regulation.
For engineers reviewing the LP2951-02BM-TR datasheet, LP2951-02BM-TR pinout, LP2951-02BM-TR application, or LP2951-02BM-TR equivalent, key selection criteria include dropout voltage at light/heavy load (40 mV / 380 mV), error flag threshold accuracy (±5% of VOUT), shutdown logic compatibility (TTL/CMOS), and thermal stability over –40°C to +125°C junction range.
Technical Context
The LP2951-02BM-TR integrates a precision 1.235 V bandgap reference, error amplifier, and PNP pass transistor in a single IC. Its feedback architecture supports both fixed 5 V operation (via internal 5V TAP) and programmable output (1.24 V–29 V) using external resistors on the FEEDBACK pin.
It features dual comparator-based monitoring: an ERROR output asserts low when output drops ~5% below nominal (e.g., <4.75 V at 5 V setting), and a logic-compatible SHUTDOWN input enables full regulator disable with <10 μA standby current. Dropout behavior is characterized by minimal quiescent current increase in dropout - preserving battery runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±0.5% (typical 4.975–5.025 V at 25°C); tight tolerance enables use as system reference without trimming. |
| Dropout Voltage | 40 mV @ 100 μA, 380 mV @ 100 mA; allows regulation from VIN as low as 5.04 V at full load. |
| Quiescent Current | 75 μA typical; increases only slightly in dropout - critical for multi-year battery life in always-on sensors. |
| Line & Load Regulation | 0.03%/0.04% typical; ensures <±0.5 mV output shift across input (2.3–30 V) and load (100 μA–100 mA) ranges. |
| Temp. Coefficient | 20 ppm/°C max; guarantees <±6 mV drift over –40°C to +125°C - suitable for precision analog subsystems. |
| Error Flag Threshold | Typically 5% below nominal VOUT (e.g., 4.75 V at 5 V); provides early warning of input collapse or battery depletion. |
| Shutdown Input Logic | Active-high TTL/CMOS compatible; VIH ≥ 2.0 V, VIL ≤ 0.7 V; enables microcontroller-controlled power sequencing. |
Pinout & Package
LP2951-02BM-TR is supplied in an 8-pin SOIC (M) package (JEDEC MS-012AC), with 1.27 mm pitch, body size 4.9 mm × 6.0 mm, and exposed pad not present. Thermal resistance is θJA = 160°C/W on standard FR4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUTPUT) | Regulated output node | Delivers up to 100 mA; requires ≥1 μF ceramic capacitor for stability; connects directly to load. |
| 2 (SENSE) | Output voltage sense point | Used for remote sensing to compensate PCB trace IR drop; tied to OUTPUT in local-sense configurations. |
| 3 (SHUTDOWN) | Digital enable control input | High (>2.0 V) enables regulation; low (<0.7 V) disables output and reduces ground current to <10 μA. |
| 4 (GROUND) | Analog and power ground reference | Common return for internal circuitry, error amplifier, and shutdown logic; must be low-impedance. |
| 5 (ERROR) | Open-collector fault indicator | Sinks current when VOUT drops ~5% below nominal; used for power-on reset or battery-low alert. |
| 6 (5V TAP) | Internal 5 V reference tap | Provides access to internal 5 V node; used to configure fixed-output mode without external resistors. |
| 7 (FEEDBACK) | Resistor-divider input for VREF | Connects to resistor divider for programmable outputs; bias current <40 nA minimizes divider error. |
| 8 (INPUT) | Unregulated DC input supply | Accepts 2.3 V to 30 V; minimum headroom defined by dropout voltage at given load current. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed + programmable output | Pin-strappable 5 V output or 1.24–29 V via two external resistors - eliminates need for multiple SKUs. |
| Early-warning error flag | Comparator-driven ERROR output warns of impending dropout before system reset - enables graceful shutdown. |
| Ultra-low quiescent current | 75 μA typical, with minimal rise in dropout - extends shelf life and runtime in coin-cell or Li-SOCl₂ applications. |
| Tight thermal regulation | 0.05%/W typical; limits output drift during transient load changes - critical for ADC reference stability. |
| Integrated protection | Current limiting (160 mA typ.) and thermal shutdown prevent damage during overload or ambient extremes. |
Applications
| Automotive Body Control Module | Avionics Power Sequencing |
|---|---|
Use Scenario: Regulating 5 V rail for door lock actuators, window lift controllers, and CAN transceiver bias in 12 V vehicle systems. IC Role / Device Role / Timing Role: Primary LDO supplying noise-sensitive MCU peripherals and analog sensors. Use Value: 40 mV dropout enables operation down to 10.8 V battery voltage; ERROR flag triggers diagnostic logging before brownout. | Use Scenario: Providing clean, stable 5 V to flight-critical ADCs, pressure transducers, and discrete logic in certified avionics units. IC Role / Device Role / Timing Role: Precision voltage reference and power rail generator meeting DO-160 environmental requirements. Use Value: 20 ppm/°C tempco and 0.04% load regulation ensure <±3 LSB error in 12-bit sensor measurements over full temperature range. |
| Battery-Backed Memory System | Industrial Sensor Node |
Use Scenario: Maintaining SRAM or RTC backup power during main supply failure using NiCd or supercapacitor auxiliary source. IC Role / Device Role / Timing Role: Dual-regulator supervisor with latch-off function triggered by ERROR signal. Use Value: Programmable hysteresis via external comparators allows precise disconnect/reconnect thresholds (e.g., 5.5 V off / 6.0 V on). | Use Scenario: Powering ultra-low-power wireless sensor nodes (LoRaWAN, NB-IoT) operating from primary lithium batteries for >10 years. IC Role / Device Role / Timing Role: Main system regulator enabling deep-sleep MCU modes with sub-100 μA total system current. Use Value: 75 μA quiescent current and shutdown mode (<10 μA) minimize self-discharge; 1 μF stability enables small footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP2951-03BM-TR | ±1% output tolerance (vs. ±0.5%), higher tempco (50 ppm/°C), same pinout and functionality | Suitable where cost sensitivity outweighs precision; less suitable for reference-grade ADC bias | Select LP2951-03BM-TR only if ±1% output accuracy meets system margin requirements. |
| TPS76350DBVR | 5 V fixed, 150 mA output, 85 μA IQ, no ERROR flag or programmable option, SOT-23-5 package | Lacks supervision features; smaller footprint but no remote sense or shutdown control flexibility | Choose TPS76350DBVR only for space-constrained designs where supervision and precision are secondary. |
Compared with LP2951-02BM-TR, the LP2951-03BM-TR trades precision for cost, while the TPS76350DBVR sacrifices supervision and flexibility for compactness - making LP2951-02BM-TR optimal for systems needing accuracy, diagnostics, and design adaptability.
Availability
LP2951-02BM-TR is available at Aetrix Electronics and suitable for automotive electronics, avionics subsystems, and industrial sensor nodes requiring stable component supply with guaranteed long-term availability and extended temperature support.
Supply support for LP2951-02BM-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
Microchip Technology is a leading provider of microcontrollers, analog devices, and power management ICs, serving automotive, industrial, and aerospace markets with high-reliability silicon.
The LP2951 product line delivers micropower, precision LDO regulators optimized for battery longevity and system-level supervision in harsh-environment applications - especially where wide input range, low dropout, and fault reporting are mandatory.
FAQ
What is the maximum input voltage rating for the LP2951-02BM-TR?
The LP2951-02BM-TR has an absolute maximum input supply voltage of +30 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating range is 2.3 V to 30 V, with minimum headroom determined by load-dependent dropout voltage - e.g., ≥5.38 V required for 100 mA at 5 V output.
Does the LP2951-02BM-TR require an external capacitor for stability?
Yes, the LP2951-02BM-TR requires a minimum 1 μF ceramic output capacitor for stability across all loads and temperatures. The datasheet confirms stability with ≥1 μF at the OUTPUT pin; larger values (e.g., 10 μF) improve transient response but are not required for basic regulation.
How does the ERROR output of the LP2951-02BM-TR behave under dropout conditions?
The ERROR output of the LP2951-02BM-TR is an open-collector pin that pulls low when the regulated output drops approximately 5% below nominal (e.g., <4.75 V at 5 V setting). It remains low until VOUT recovers to within ~2.5% of nominal, providing hysteresis to prevent chatter during marginal input conditions.
Can the LP2951-02BM-TR be used as a precision voltage reference?
Yes, the LP2951-02BM-TR can serve as a precision voltage reference due to its 1.235 V internal bandgap reference (±0.5% over temperature), 20 ppm/°C temperature coefficient, and ultra-low noise (430 μVRMS). When configured in fixed 5 V mode with low-noise bypassing, it achieves reference-grade stability for ADCs and sensor excitation.
What is the shutdown current consumption of the LP2951-02BM-TR?
In shutdown mode (SHUTDOWN pin <0.7 V), the LP2951-02BM-TR draws ≤10 μA total supply current - comprising <3 μA regulator output leakage and <7 μA internal bias. This ultra-low shutdown current preserves battery energy in always-connected IoT and telemetry applications.
LP2951-02BM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 1.24V (5V)
- Voltage - Output (Max):
- 29V
- Voltage Dropout (Max):
- 0.6V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 14 mA
- PSRR:
- -
- Control Features:
- Enable, Error Flag
- Protection Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LP2951-02BM-TR FAQ
1.How can I place an order for LP2951-02BM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2951-02BM-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 LP2951-02BM-TR reliable?
The price and inventory of LP2951-02BM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2951-02BM-TR is usually 5 days.
3.What payment methods are accepted for LP2951-02BM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2951-02BM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2951-02BM-TR?
LP2951-02BM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2951-02BM-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 LP2951-02BM-TR?
For technical support, including LP2951-02BM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2951-02BM-TR requirements.
6.How does Aetrix verify that LP2951-02BM-TR is sourced from the original manufacturer or authorized distributors?
All LP2951-02BM-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 LP2951-02BM-TR meets industry standards.
7.What is the process for return or replacement of LP2951-02BM-TR?
All LP2951-02BM-TR units undergo pre-shipment inspection (PSI). If there is an issue with LP2951-02BM-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 LP2951-02BM-TR part is unused and in its original packaging.
Return procedure for LP2951-02BM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2951-02BM-TR Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
