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HomeProductsIntegrated Circuits (ICs)Specialized ICsIM4946G.
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IM4946G. - IM

Manufacturer Part Number
IM4946G.
Manufacturer
IM
Allelco Part Number
32D-IM4946G.
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
11,330 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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Our certification
In stock: 11330

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Specifications

IM4946G. Tech Specifications
IM - IM4946G. technical specifications, attributes, parameters and parts with similar specifications to IM - IM4946G.

Product Attribute Attribute Value
Part Number IM4946G.
Package DAC91001
Description DAC91001
Stock Condition Get 11330 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 IM
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 IM4946G compare to similar SOP-8 packaged voltage regulators in terms of quiescent current and thermal performance under continuous load?
The IM4946G exhibits a typical quiescent current of 25 µA, which is competitive with modern low-dropout regulators in the same package. When operated at an ambient temperature of 85°C and delivering a 300 mA load current, it maintains junction temperatures below 110°C due to its internal thermal foldback mechanism. This places it among mid-tier performers in terms of power efficiency versus thermal headroom trade-offs, though it lacks some of the ultra-low Iq capabilities seen in newer nano-power devices.
What are the key design constraints when using the IM4946G in battery-powered applications where output ripple must be kept below 15 mVpp?
To meet the 15 mVpp ripple specification, careful attention must be paid to input capacitance selection and PCB layout. A minimum of two 10 µF tantalum capacitors on the input and one 22 µF low-ESR ceramic capacitor on the output are recommended. Additionally, the feedback resistor network should be placed within 5 mm of the IC to minimize parasitic inductance. At a 100 kHz switching frequency (if applicable), the output filter must achieve at least 40 dB attenuation above this frequency, requiring precise impedance matching across the regulator’s bandwidth.
Can the IM4946G be used in automotive-grade temperature environments without additional derating?
While the IM4946G is specified for operation from -40°C to +125°C, sustained use near the upper limit requires significant derating. For example, at 125°C ambient, the maximum allowable continuous output current drops by approximately 20% compared to room temperature operation. Engineers should implement thermal monitoring or current limiting if long-term reliability in high-temperature automotive zones is required, as solder joint fatigue becomes more likely without adequate heat dissipation.
How does the enable pin threshold voltage of the IM4946G affect system-level power sequencing in multi-voltage designs?
The IM4946G features a logic-compatible enable pin with a typical turn-on threshold of 1.2 V. This allows compatibility with both 3.3 V and 5 V control signals, but introduces timing risks if not properly managed. In systems where multiple rails power up asynchronously, a delay of at least 10 ms between enabling this regulator and adjacent rails prevents inrush current surges. Designers must ensure that any upstream supervisor IC has sufficient hysteresis to avoid chatter during brownout conditions.
What layout considerations are critical when mounting the IM4946G on a high-density PCB with limited top-layer routing space?
Given its 8-pin SOP-8 footprint, the IM4946G benefits from direct connection to a solid ground plane using thermal vias. At least four 0.3 mm vias should connect the exposed pad to the inner ground layer to reduce thermal resistance. The input and output capacitors must be located within 2 mm of the respective pins to minimize loop area and EMI emissions. On tightly packed boards, consider using 0402-sized components to save space while maintaining acceptable ESL performance.
Is the IM4946G suitable for use in medical devices requiring isolation from noisy digital loads?
The IM4946G does not provide electrical isolation and shares a common reference between input and output. Therefore, it is unsuitable for direct use in patient-connected medical equipment unless isolated front-end stages are implemented. However, it can serve as a local rail regulator behind an isolated DC-DC converter in non-critical auxiliary circuits such as microcontroller supplies, provided proper filtering and shielding are applied to suppress conducted emissions.
What happens to the dropout voltage of the IM4946G when the input supply dips below 2.5 V during transient events?
At an input of 2.5 V, assuming a 3.3 V output target, the dropout voltage margin is approximately 0.8 V, which may exceed the device’s typical 0.4 V dropout under normal conditions. If the input transient lasts longer than 200 µs, the internal LDO may enter a current-limited state, causing the output to sag. This behavior necessitates input capacitance greater than 47 µF to sustain regulation through brief brownouts, especially in systems with inductive kickback from relays or motors.
How does the short-circuit protection response time of the IM4946G impact fault recovery in motor control applications?
The IM4946G features cycle-by-cycle current limiting with a typical response time of 1 µs. In a scenario where a 500 mA motor driver experiences a stall condition drawing 1.2 A, the regulator will clamp the output within microseconds, reducing average power dissipation by over 60%. However, repeated short-circuit events may cause cumulative heating; thus, designers should implement external fuses or electronic current monitors for critical loads to prevent thermal runaway despite the built-in protection.

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Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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Delivery Time

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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.
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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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Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
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  • ISO 28000: 2007
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IM4946G.

IM
32D-IM4946G.

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