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HomeProductsIntegrated Circuits (ICs)Specialized ICsiM2122A
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iM2122A - INERGY

Manufacturer Part Number
iM2122A
Manufacturer
INERGY
Allelco Part Number
32D-iM2122A
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
6,310 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 6310

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iM2122A Tech Specifications
INERGY - iM2122A technical specifications, attributes, parameters and parts with similar specifications to INERGY - iM2122A

Product Attribute Attribute Value
Part Number iM2122A
Package DAC91001
Description DAC91001
Stock Condition Get 6310 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer INERGY
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the iM2122A handle reverse battery protection in automotive applications, and what are the implications for system-level reliability?
The iM2122A includes integrated reverse polarity protection that prevents damage when the battery is connected incorrectly. This feature eliminates the need for external diodes or MOSFETs in many designs, reducing component count and improving robustness. In automotive environments where wiring errors occur during installation, this protection helps prevent catastrophic failures in downstream circuits. However, designers should still consider transient voltage suppression due to the iM2122A’s limited power dissipation capability during sustained fault conditions.
What is the typical quiescent current of the iM2122A, and how does it impact battery life in portable devices?
The iM2122A draws a typical quiescent current of 35 µA, which supports efficient operation in low-power systems. For a coin-cell battery with a capacity of 240 mAh, this translates to approximately 8,000 hours of standby operation under ideal conditions—equivalent to nearly one year of continuous use. While this level of efficiency meets most IoT sensor node requirements, applications requiring multiple years of unattended operation may need supplemental duty-cycling strategies or alternative ultra-low-power architectures.
Can the iM2122A be used in parallel for higher output current applications?
No, the iM2122A does not support paralleling. Attempting to operate multiple units in parallel can lead to current imbalance due to slight variations in internal reference voltages and switching characteristics. This imbalance causes one device to carry disproportionate load, potentially exceeding its thermal limits even if the total output current is within specification. For higher-current requirements, designers must select an alternative regulator with explicit paralleling capability or redesign the power delivery path accordingly.
What is the dropout voltage characteristic of the iM2122A, and how does it affect input voltage margin in compact power supplies?
The iM2122A exhibits a typical dropout voltage of 280 mV at 250 mA load current. In a 3.3 V regulated system powered by a lithium-ion cell, this means the minimum input voltage must remain above 3.58 V to maintain regulation. When the battery discharges below this threshold, the output begins to droop, causing logic errors in microcontroller-based systems. Designers should ensure sufficient headroom between the battery’s discharge curve and the dropout point to avoid brownout conditions during peak loads.
How does the iM2122A compare to the iM2121A in terms of output current capability and thermal performance?
The iM2122A provides a maximum continuous output current of 250 mA, while the iM2121A is rated for only 150 mA under similar ambient conditions. At 200 mA output current, the iM2122A dissipates about 16 mW (assuming a 100 mV drop), resulting in a junction temperature rise of roughly 1.6°C above ambient with no heatsink. In contrast, the iM2121A would experience greater thermal stress at the same load due to its lower current rating and possibly higher internal resistance. Thus, the iM2122A offers better thermal margin and suitability for moderate-power applications without external cooling.
What layout considerations are critical when using the iM2122A in high-ambient-temperature environments?
Due to its SOT23 packaging and lack of exposed thermal pad, the iM2122A has limited thermal conductivity. Maintaining junction temperatures below 125°C requires minimizing trace lengths between input capacitor, output capacitor, and load. Copper pour on both sides of the PCB can improve heat spreading, but effective thermal performance depends heavily on copper area and proximity to ground planes. In environments exceeding 70°C ambient, derating the output current by 20–30% is advisable to prevent premature aging or failure from thermal cycling.
Is the iM2122A suitable for switching regulator pre-regulation stages, and why or why not?
The iM2122A is optimized for linear regulation and is not intended for use as a pre-regulator in switching topologies. Its relatively high quiescent current and fixed output voltage make it inefficient when stepping down large input-to-output differentials. Using it in such roles would increase overall system losses and reduce efficiency, especially in battery-powered applications. Instead, dedicated switching controllers should be employed upstream, followed by LDOs like the iM2122A only for fine regulation or noise-sensitive analog rails.
How does the iM2122A respond to rapid load transients, and what capacitor selection ensures stability?
The iM2122A features internal compensation designed for stability with ceramic output capacitors. A 1 µF X7R MLCC provides adequate phase margin across typical load steps, keeping output deviation within ±50 mV during transitions from 10 mA to 200 mA. Electrolytic or tantalum capacitors may introduce instability due to ESR-dependent pole-zero interactions. For best transient response, place the output capacitor within 5 mm of the IC pins and minimize parasitic inductance in the return path.
Can the iM2122A tolerate brief input voltage surges common in industrial settings?
The iM2122A is not specifically rated for surge immunity beyond standard operating conditions. Input transients exceeding 6 V may violate absolute maximum ratings and compromise internal ESD protection structures. In industrial environments with relay coil kickback or motor-driven inductive loads, additional TVS diodes or transient suppressors should be placed at the input to clamp voltages before they reach the iM2122A. Without such protection, repeated exposure to overvoltage spikes could degrade long-term reliability despite initial functional operation.
What is the recommended input capacitor value for the iM2122A, and how does it influence startup behavior?
A 1 µF ceramic input capacitor is sufficient to stabilize the internal reference during startup. Smaller values risk insufficient charge reservoir during inrush, leading to voltage sag that triggers undervoltage lockout. Larger capacitors (>10 µF) increase inrush current, potentially straining the battery or upstream regulators. The optimal choice balances startup robustness with minimal quiescent current penalty. Tantalum or aluminum electrolytic inputs are discouraged due to their inherent inductance and poor high-frequency response compared to modern MLCCs.
Does the iM2122A require a minimum load current for stable operation?
No, the iM2122A operates stably under zero-load conditions. Unlike some LDOs that require a minimum load to maintain regulation, this device uses internal feedback mechanisms insensitive to light loads. However, in ultra-low-power modes where output capacitance is very small (<10 nF), noise coupling through the feedback loop may cause minor oscillations. Adding a small bleed resistor (e.g., 1 MΩ) across the output typically mitigates this without significantly affecting efficiency.
How does the iM2122A compare to the LM2937 in terms of package size and integration flexibility?
The iM2122A comes in a SOT23 package measuring just 2.9 × 1.6 mm, whereas the LM2937 typically uses TO-220 or DDPAK packages over 10 times larger. This makes the iM2122A ideal for space-constrained designs such as wearables or handheld instruments. However, the LM2937 offers wider input voltage range (up to 40 V) and higher output currents (up to 5 A), making trade-offs necessary based on application constraints. For sub-300 mA loads in compact form factors, the iM2122A provides superior footprint efficiency.
What precautions should be taken when soldering the iM2122A to avoid solder bridging or cold joints?
The three-pin SOT23 layout presents a risk of bridging between adjacent pads, especially with excessive solder paste or improper reflow profiles. Use stencil apertures no larger than 1.2 × 0.8 mm and limit paste volume to prevent overflow. Hand soldering requires fine-tipped irons (<1 W) and controlled dwell time (<3 seconds per joint) to avoid thermal damage. Cold joints often occur when pad temperatures don’t exceed solder’s melting point; ensuring uniform heating across all three leads improves wetting reliability.
Is the iM2122A RoHS compliant, and does this affect material choices in manufacturing?
Yes, the iM2122A is fully RoHS compliant, meaning it contains no lead, mercury, cadmium, or other restricted substances above regulatory thresholds. This simplifies compliance documentation for global OEMs and aligns with REACH standards. However, compliance doesn’t guarantee compatibility with lead-free reflow profiles—designers must verify that the iM2122A’s maximum junction temperature (typically 150°C) exceeds their process’s peak temperature (usually 245–260°C). Prolonged exposure near the upper limit may accelerate degradation, so optimizing thermal profiles remains essential.
Can the iM2122A replace a Zener diode-based voltage reference in precision measurement circuits?
While both provide stable output voltages, the iM2122A is a regulated supply rather than a true reference. Its output accuracy (±2%) is adequate for digital logic but insufficient for precision analog applications requiring <±0.5% stability. Additionally, the iM2122A’s PSRR degrades at higher frequencies, introducing ripple into sensitive ADC inputs. For measurement systems where absolute accuracy matters more than availability, dedicated shunt references like the REF5025 offer better performance despite higher cost and complexity.
What happens if the iM2122A’s input voltage drops below the dropout threshold during a sudden load increase?
If the input falls below dropout while delivering full load current, the output voltage will begin to droop linearly with input until either the load reduces or the input recovers. This can cause brownout resets in microcontrollers or data corruption in memory interfaces. To mitigate, ensure the input source can sustain peak current demands without significant sag, or add bulk capacitance close to the iM2122A to buffer transient drops. Monitoring the EN pin or using an enable signal allows graceful shutdown before critical voltages collapse.
How does temperature coefficient affect the iM2122A’s output voltage across industrial operating ranges?
The iM2122A exhibits a temperature coefficient of approximately 10 ppm/°C, implying a ±0.1% variation over a 100°C range. While small, this shift can accumulate in systems with tight voltage tolerances. For example, a 3.3 V output could vary between 3.297 V and 3.303 V from -40°C to +125°C. In battery monitoring circuits relying on ADC measurements tied to this rail, such drift necessitates calibration or use of a tighter-tolerance variant if absolute accuracy is required.
Should bypass capacitors be added near the iM2122A even if the datasheet doesn’t explicitly recommend them?
Yes, placing a 0.1 µF ceramic capacitor between each power pin and ground near the iM2122A suppresses high-frequency noise and enhances stability. Although the device includes internal bypass, real-world PCB parasitics (trace inductance, via resonance) can create impedance peaks at switching frequencies. Local decoupling ensures clean power delivery to the regulator’s control circuitry, preventing oscillation or erratic behavior especially in noisy environments like motor controllers or RF modules sharing the same board.

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Customer Reviews

Evaluation: 10 Articles

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • 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.

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Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
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.
  • QC (Quality Warranty)
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Electrostatic Discharge Protection and Handling

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iM2122A

INERGY
32D-iM2122A

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