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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - LinearMIC2951-03YM-TR
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MIC2951-03YM-TR - Microchip Technology

Manufacturer Part Number
MIC2951-03YM-TR
Manufacturer
Microchip Technology
Allelco Part Number
32D-MIC2951-03YM-TR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
35,518 pcs available, New & Original
Parts Description
IC REG LIN POS ADJ 150MA 8SOIC
Package
8-SOIC
Data sheet
MIC2951-03YM-TR.pdf

PCN Assembly/Origin

2.73KHz.pdf

PCN Part Number

2.73KHz.pdf

PCN Design/Specification

Silver Bonding Wire 22/Jul/2015.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 35518
  • Unit Price: $0.701
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.701 $0.70
10+ $0.591 $5.91
30+ $0.53 $15.90
100+ $0.463 $46.30
500+ $0.431 $215.50
1000+ $0.418 $418.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

MIC2951-03YM-TR Tech Specifications
Microchip Technology - MIC2951-03YM-TR technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - MIC2951-03YM-TR

Product Attribute Attribute Value
Manufacturer Microchip Technology
Voltage Dropout (Max) 0.6V @ 150mA
Voltage - Output (Min/Fixed) 1.24V (5V)
Voltage - Output (Max) 29V
Voltage - Input (Max) 30V
Supplier Device Package 8-SOIC
Series -
Protection Features Over Current, Over Temperature, Reverse Polarity
Package / Case 8-SOIC (0.154', 3.90mm Width)
Package Tape & Reel (TR)
PSRR -
Product Attribute Attribute Value
Output Type Adjustable (Fixed)
Output Configuration Positive
Operating Temperature -40°C ~ 125°C
Number of Regulators 1
Mounting Type Surface Mount
Current - Supply (Max) 8 mA
Current - Quiescent (Iq) 300 µA
Current - Output 150mA
Control Features Enable
Base Product Number MIC2951

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

MIC2951-03YM-TR Image
MIC2951-03YM-TR (1)

Manufacturer Part Number

MIC2951-03YM-TR

Manufacturer

Microchip Technology

Introduction

The MIC2951-03YM-TR is a versatile, adjustable output linear LDO regulator.

Product Features and Performance

Adjustable output voltage from 1.24V to 29V

Low dropout voltage of 0.6V @ 150mA load

150mA output current capability

Low quiescent current of 300 µA

Support for enable control feature

Product Advantages

High input voltage range up to 30V

Low quiescent current for power-sensitive applications

Thermal and overcurrent protection for enhanced safety

Reverse polarity protection for increased reliability

MIC2951-03YM-TR Image
MIC2951-03YM-TR (2)

Key Technical Parameters

Input Voltage (Max) 30V

Output Voltage (Min/Fixed) 1.24V

Output Voltage (Max) 29V

Voltage Dropout (Max) 0.6V @ 150mA

Output Current 150mA

Quiescent Current (Iq) 300 µA

Supply Current (Max) 8 mA

Protection Features Over Current, Over Temperature, Reverse Polarity

Quality and Safety Features

Overcurrent protection

Overtemperature protection

Reverse polarity protection

Compatibility

Enable control suitable for various applications

Surface Mount 8-SOIC package compatible with standard PCB technology

Application Areas

Consumer electronics

Industrial controls

Battery-powered devices

Product Lifecycle

Product Status Active

No immediate discontinuation indicated, with ongoing support and availability

Several Key Reasons to Choose This Product

High input voltage capability accommodating a broad range of applications

Low dropout voltage enabling efficient operation even at low voltages

Extended operating temperature range from -40°C to 125°C suitable for harsh environments

Surface Mount technology for compact and reliable PCB design

Manufacturer reputation and reliability of Microchip Technology products

Frequently Asked Questions(FAQ)

What is the typical dropout voltage of the MIC2951-03YM-TR linear regulator at full load, and how does this impact efficiency in battery-powered applications?
At a 150mA output current, the MIC2951-03YM-TR exhibits a maximum dropout voltage of 0.6V, which means it can maintain regulation when the input-to-output differential falls to this threshold. In battery-operated systems where supply headroom is limited—such as lithium-ion cells degrading toward 3.0V—this low dropout characteristic allows the regulator to remain operational longer compared to higher-dropout alternatives, preserving usable battery life and reducing wasted energy as heat.
How does the quiescent current of the MIC2951-03YM-TR compare to other regulators in its class, and what are the implications for power-sensitive designs?
With a quiescent current (Iq) of 300 µA, the MIC2951-03YM-TR offers relatively low standby power consumption, which is advantageous in always-on or intermittently active circuits. While ultra-low-power switchers may achieve lower Iq, most linear regulators in the same package and output range typically draw between 400 µA and 1 mA. This makes the MIC2951-03YM-TR suitable for portable devices where minimizing idle power is critical without requiring switching topology complexity.
Can the MIC2951-03YM-TR be used with ceramic input and output capacitors, and what layout considerations are necessary to ensure stable operation?
Yes, the MIC2951-03YM-TR is designed for use with standard ceramic capacitors, including X7R and X5R types, provided they meet minimum capacitance requirements. However, to maintain stability across temperature and load variations, a 10µF minimum on both input and output is recommended. Careful PCB layout—with short traces, low inductance paths, and capacitor placement close to the IC—is essential, especially since internal compensation is fixed and sensitive to parasitic inductance that could compromise phase margin.
What protection mechanisms does the MIC2951-03YM-TR incorporate, and how do they enhance system reliability during fault conditions?
The MIC2951-03YM-TR includes overcurrent, overtemperature, and reverse polarity protection features, which safeguard both the regulator and downstream circuitry. Overcurrent limits prevent damage during shorted loads, while thermal shutdown disables the output if junction temperatures exceed safe thresholds—typically around 150°C. Reverse polarity protection ensures the device remains unaffected if the supply is accidentally connected in reverse, making it robust in industrial and automotive environments subject to wiring errors.
How does the adjustable output version of the MIC2951-03YM-TR differ from fixed-output variants like the MIC2951-05YME, particularly in terms of flexibility and design overhead?
Unlike fixed-output versions such as the MIC2951-05YME which delivers a nominal 5V, the MIC2951-03YM-TR provides an adjustable output via an external resistor divider, allowing output voltages between 1.24V and 29V. This offers greater design flexibility but introduces minor trade-offs: increased component count, potential tolerance stacking in the feedback network, and slightly reduced line/load regulation accuracy due to resistor precision requirements. For applications needing non-standard voltages, however, this adjustability eliminates the need for multiple fixed regulators.
Is the MIC2951-03YM-TR suitable for use in automotive applications, and what environmental qualifications support this usage?
While not explicitly AEC-Q100 qualified, the MIC2951-03YM-TR operates reliably over an extended temperature range of -40°C to +125°C, matching many automotive-grade components’ thermal demands. Combined with its robust protection features and proven reliability in industrial systems, it can be used in non-safety-critical automotive subsystems such as infotainment or sensor power conditioning, provided full system-level validation is performed under actual operating conditions.
How does the MIC2951-03YM-TR handle transient load steps, and what output capacitance is required for stable performance under dynamic loads?
The MIC2951-03YM-TR demonstrates good transient response due to internal error amplifier bandwidth, but stability depends on adequate output capacitance. A minimum of 10µF effective capacitance—preferably low-ESR ceramic—is required to suppress oscillations during rapid load transitions. Without sufficient capacitance, the regulator may become unstable or exhibit overshoot/undershoot beyond acceptable limits, particularly in digitally controlled loads with fast current ramps.
What is the significance of the MSL rating for the MIC2951-03YM-TR, and how should inventory handling practices reflect this classification?
Classified as Moisture Sensitivity Level 1 (MSL 1), the MIC2951-03YM-TR has unlimited shelf life under normal storage conditions and requires no special drying prior to reflow soldering. This simplifies procurement logistics and reduces handling costs, making it ideal for high-volume production environments where just-in-time delivery and long-term stocking are common practices.
Can the MIC2951-03YM-TR replace the TL751L05CDR in existing designs, and what key differences should be evaluated before substitution?
Although the TL751L05CDR is listed as a substitute, direct replacement requires careful consideration: the TL751L05CDR is a fixed 5V regulator, whereas the MIC2951-03YM-TR is adjustable. If the original circuit relies on a precise 5V output, substituting with the adjustable version necessitates adding resistors and revalidating regulation accuracy. Additionally, the MIC2951-03YM-TR offers superior protection features and potentially better thermal performance, but its pinout must be verified against the original footprint.
What is the typical efficiency of the MIC2951-03YM-TR when regulating 5.5V down to 3.3V at 100mA, and how does this compare to switching regulators in similar scenarios?
At Vin = 5.5V and Vout = 3.3V with 100mA load, the efficiency is approximately 60%, calculated as (3.3 / 5.5) × 100%. While this is acceptable for linear regulation, synchronous buck converters typically achieve 85–92% efficiency in the same scenario, resulting in significantly lower power dissipation. The MIC2951-03YM-TR may still be preferred when noise sensitivity, simplicity, or cost outweighs efficiency concerns.
How does the enable pin function on the MIC2951-03YM-TR, and what are best practices for controlling it in microcontroller-based systems?
The enable pin acts as a logic-controlled shutdown input: pulling it below 1.2V disables the regulator, reducing quiescent current to near-zero levels. In microcontroller-driven systems, this pin should be driven by a digital GPIO capable of sinking/sourcing sufficient current, with a pull-up resistor (e.g., 10kΩ) to ensure a defined high state during startup. Avoid floating the pin, as it may lead to unpredictable behavior or partial conduction.
Are there any known limitations in using the MIC2951-03YM-TR with high-impedance loads or in low-noise analog applications?
Yes, the MIC2951-03YM-TR has limited output drive capability and may struggle with very light loads (<10mA) if the feedback network draws significant current or if capacitive loads are absent. Additionally, its PSRR specification is unspecified, indicating moderate power supply rejection, which might make it unsuitable for sensitive analog front-ends unless additional filtering or post-regulation is employed. For clean analog rails, consider dedicated LDOs with high PSRR or add LC filters after regulation.
How does the package size of the 8-SOIC variant compare to alternative packages for the MIC2951-03YM-TR, and what trade-offs exist in thermal performance?
The 8-SOIC package measures 3.90mm wide with a typical thermal resistance (θJA) of ~150°C/W. Alternative packages like DPAK offer better heatsinking but larger footprints, improving θJA to ~40°C/W. In space-constrained applications, the SOIC is acceptable for currents up to 150mA with modest thermal margins; for higher ambient temperatures or continuous full-load operation, external heatsinking or a more thermally efficient package should be considered.
What is the role of the base product number MIC2951 in identifying compatible derivatives, and how do they vary functionally?
The base product number MIC2911 defines a family of fixed-output regulators, while MIC2951 refers specifically to the adjustable version. Derivatives include fixed-voltage models like MIC2951-02YM-TR (2.5V), MIC2951-03YM-TR (3.3V), and others, all sharing core protection and stability features. Designers can leverage this consistency across the family to simplify BOM management when multiple voltages are needed, though each variant must be selected based on required output range and pin compatibility.
Can the MIC2951-03YM-TR operate reliably with unregulated solar panel inputs, and what precautions are necessary given variable input voltage and current?
Yes, the MIC2951-03YM-TR can regulate inputs up to 30V, making it viable with small solar panels under full sun. However, during periods of low illumination or panel mismatch, the input may dip below dropout, causing output droop. To ensure stability, include bulk capacitance (≥100µF) on the input side and verify that the minimum panel voltage stays above Vout + 0.6V under worst-case loads. Also, consider adding a blocking diode to prevent reverse current flow at night.
How does the RoHS compliance status of the MIC2951-03YM-TR influence global regulatory adherence, and what documentation supports this?
Certified as RoHS3 compliant, the MIC2951-03YM-TR meets all restrictions on hazardous substances including lead, mercury, cadmium, and hexavalent chromium, with exemptions tracked per Annex III of Directive 2011/65/EU. This ensures readiness for export into major markets like Europe, China, and California, and simplifies compliance audits for OEMs manufacturing consumer or industrial electronics under international standards.
What are the key differences between the MIC2951-03YM-TR and the MIC2951-02YM-TR in terms of output range and typical use cases?
The MIC2951-03YM-TR is adjustable, offering output voltages from 1.24V to 29V via external resistors, while the MIC2951-02YM-TR is internally set to 2.5V. This makes the adjustable version ideal for custom voltage rails, whereas the fixed 2.5V model suits applications requiring a stable reference without feedback circuitry. Both share identical protection features, dropout characteristics, and package compatibility, enabling easy substitution only if the target voltage matches exactly.
How should the MIC2951-03YM-TR be stored and handled to maintain long-term reliability, especially in humid or high-temperature environments?
Given its MSL 1 rating, the MIC2951-03YM-TR can be stored indefinitely at <60% relative humidity and <30°C without baking. Standard ESD protocols apply, and components should be handled in anti-static packaging during assembly. Avoid prolonged exposure to corrosive atmospheres or mechanical stress, as the SOIC mold compound is susceptible to cracking under excessive flexure—particularly at the lead frame interface.

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology MIC2951-03YM-TR

Product Attribute MIC2951-03YMM-TR MIC2951-03BMM-TR MIC2951-3.3BM-TR MIC2951-03BM TR
Part Number MIC2951-03YMM-TR MIC2951-03BMM-TR MIC2951-3.3BM-TR MIC2951-03BM TR
Manufacturer Microchip Technology Microchip Technology Microchip Technology Microchip Technology
Number of Regulators - - - -
PSRR - - - -
Voltage Dropout (Max) - - - -
Current - Quiescent (Iq) - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Output Configuration - - - -
Voltage - Output (Max) - - - -
Current - Supply (Max) - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Control Features - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - Output (Min/Fixed) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Protection Features - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Input (Max) - - - -
Current - Output - - - -
Series - - - -

MIC2951-03YM-TR Datasheet PDF

Download MIC2951-03YM-TR pdf datasheets and Microchip Technology documentation for MIC2951-03YM-TR - Microchip Technology.

Datasheets
Cylindrical Battery Holders.pdf
PCN Assembly/Origin
2.73KHz.pdf
PCN Part Number
2.73KHz.pdf
PCN Packaging
Mult Devices 17/Nov/2017.pdf Packing Changes 10/Oct/2016.pdf
PCN Design/Specification
Silver Bonding Wire 22/Jul/2015.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
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New Zealand 5
Asia India 4
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Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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MIC2951-03YM-TR Image

MIC2951-03YM-TR

Microchip Technology
32D-MIC2951-03YM-TR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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