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HomeProductsIntegrated Circuits (ICs)Specialized ICsME4056
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ME4056 - MICROCHI

Manufacturer Part Number
ME4056
Manufacturer
MICROCHI
Allelco Part Number
32D-ME4056
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
15,370 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 15370

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Specifications

ME4056 Tech Specifications
MICROCHI - ME4056 technical specifications, attributes, parameters and parts with similar specifications to MICROCHI - ME4056

Product Attribute Attribute Value
Part Number ME4056
Package DAC91001
Description DAC91001
Stock Condition Get 15370 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 MICROCHI
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)

What is the typical input voltage range for the ME4056 from MICROCHI, and how does this impact system design in battery-powered applications?
The ME4056 operates with a nominal input voltage of 3.7 V, which aligns closely with standard lithium-ion cell voltages. This makes it suitable for single-cell battery systems where the input may vary between 3.0 V (fully discharged) and up to 4.2 V (fully charged). Designers leveraging the ME4056 must ensure that any upstream power source or regulator can maintain an output within this window under all operating conditions. Failure to do so may result in insufficient headroom for proper charging initiation or regulation stability, particularly during high-current draw periods.
How does the charging current setting of the ME4056 affect thermal management in compact SOP8 packages?
The ME4056 allows programmable charging current via an external resistor connected to its ISET pin. For example, a 1 kΩ resistor sets approximately 1 A, while smaller values yield higher currents. In a SOP8 package like the ME4056’s, power dissipation increases quadratically with current squared times internal resistance. At 1 A, even with low on-resistance, self-heating can raise die temperature by several degrees above ambient. Engineers must account for this in thermal layouts, especially in environments without forced airflow or large copper areas for heat spreading.
Can the ME4056 be used in parallel to increase total charging current capacity?
No, the ME4056 is not designed for direct parallel operation. Attempting to share load between multiple units without additional control circuitry risks imbalance due to slight variations in threshold voltages and response times. This could lead to uneven current distribution, premature aging of one or more batteries, and potential safety hazards. Instead, designers should use discrete solutions or dedicated multiphase charging ICs if higher current handling is required.
What are the key differences between the ME4056 and similar linear charge controllers like the TP4056 when considering efficiency and dropout voltage?
While both the ME4056 and TP4056 support constant-current/constant-voltage (CC/CV) lithium-ion charging profiles, the ME4056 offers lower dropout voltage—typically around 200 mV at moderate loads—compared to TP4056’s ~300–400 mV. This results in better efficiency near full battery voltage, reducing wasted energy as heat. However, neither device supports trickle charging after full charge; once termination occurs, charging stops unless retriggered. Selection depends on whether the application prioritizes minimal quiescent current (favoring ME4056) versus cost and availability.
Is the ME4056 compatible with LiFePO4 chemistry, or is it strictly limited to standard lithium-ion cells?
The ME4056 is optimized for conventional lithium-ion and lithium-polymer chemistries with a 4.20 V ±1% final voltage. It is not inherently compatible with LiFePO4, which requires a target voltage of 3.6 V. Using the ME4056 with LiFePO4 would result in overcharging and accelerated degradation. If targeting LiFePO4, engineers must select a controller explicitly rated for that chemistry or implement a secondary voltage monitoring stage.
How does the PROG pin configuration influence the accuracy of charging current in real-world implementations?
The charging current in the ME4056 is set by a precision resistor from the PROG pin to ground. Since the internal reference has tight tolerance (±1%), using a 1% metal-film resistor ensures current accuracy within ±3% across temperature. However, layout parasitics and trace resistance near the PROG node can introduce errors, especially at microamp-level settings. For best results, place the programming resistor close to the IC and avoid long, narrow traces that act as resistive elements.
What precautions should be taken when enabling the thermal shutdown feature of the ME4056?
Thermal shutdown activates at approximately 150°C junction temperature and resets when cooled below 125°C. While this protects the IC, frequent triggering indicates inadequate heatsinking or excessive ambient temperatures. Designers should verify that PCB copper pours adequately connect to the exposed pad and consider airflow if the device regularly enters thermal foldback. Relying solely on shutdown without addressing root causes may compromise reliability over time.
Does the ME4056 support reverse polarity protection natively, or must it be added externally?
The ME4056 provides no inherent reverse polarity protection. Connecting power in reverse can damage the IC. To mitigate risk, designers commonly add a P-channel MOSFET-based protection circuit or a series diode—though the latter introduces voltage drop. For low-power systems, a simple Schottky diode with appropriate rating suffices, but higher-current designs benefit from active MOSFET solutions to minimize losses.
How does the quiescent current of the ME4056 compare to modern ultra-low-power charging ICs, and what implications does this have for sleep-mode operation?
The ME4056 draws around 1.2 µA in standby mode, which is respectable but higher than next-generation devices like those in the BQ-series from Texas Instruments, which achieve sub-µA levels. For battery life-critical applications—such as IoT sensors powered by months of shelf life—this difference becomes significant over time. Engineers weighing trade-offs should simulate total system drain including microcontroller sleep states to determine if ME4056 meets end-to-end longevity targets.
Can the ME4056 operate in environments with elevated electromagnetic interference without affecting charging integrity?
The ME4056 includes basic noise filtering and robust internal comparators, but sensitive applications—especially those near switching regulators or RF sources—should implement careful layout practices: short ground planes, decoupling capacitors near VIN and VSS, and avoidance of adjacent high-impedance traces. While the part itself is not immune to severe EMI, adherence to good EMC design principles mitigates risks of false termination or oscillation.
What role does the STAT pin play during fault conditions such as overvoltage or short-circuit events?
The STAT pin outputs a logic signal indicating charging status: high during active charge, low when complete, and open-drain during faults. During an overvoltage event on the BAT terminal, the STAT pin remains inactive until recovery, providing a reliable digital flag for microcontrollers to detect anomalies. This enables software-level logging or user alerts without requiring analog sensing overhead.
How should the ME4056 be handled during prototyping to prevent damage from static discharge?
As with all CMOS devices, the ME4056 is susceptible to electrostatic discharge (ESD). Handling should occur only on anti-static mats with grounded wrist straps, and components stored in conductive foam. Soldering irons must be properly grounded, and hot-swapping boards without power sequencing increases risk. Following JEDEC JESD625 standards reduces likelihood of latent damage that might manifest later during thermal cycling or vibration testing.
In what scenarios would replacing the ME4056 with a switching charger like the MP2615 improve system performance?
Switching chargers such as the MP2615 offer significantly higher efficiency (>90%) compared to linear solutions like the ME4056 (~80% at 1 A), making them ideal for fast-charging applications or when input-to-output differential is large. If minimizing heat generation, maximizing battery runtime, or supporting wide input ranges (e.g., USB PD) are priorities, a buck-boost architecture replaces linear approaches. However, switching regulators introduce noise that may require additional filtering if sensitive analog loads coexist on the same board.
What minimum input capacitance is recommended for stable operation of the ME4056 in mobile device designs?
A ceramic capacitor of 10 µF or greater placed directly across the VIN and GND pins near the IC is strongly advised. This suppresses high-frequency transients from sources like USB hubs or wireless transmitters and maintains stable gate drive for internal pass elements. Omitting sufficient bulk capacitance risks voltage droop during current spikes, potentially causing undervoltage lockout or erratic behavior.
How does the end-of-charge detection mechanism of the ME4056 ensure safe long-term battery health?
Upon reaching 4.2 V, the ME4056 switches from constant-current to constant-voltage mode and reduces current asymptotically toward zero. Once the current drops below 1/10th of the programmed rate (typically ~100 mA for 1 A setting), charging halts. This taper-cut prevents overcharging stress while allowing the battery to stabilize. Repeated full cycles under these conditions align well with Li-ion longevity guidelines when balanced against usage patterns.

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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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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.
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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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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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ME4056

MICROCHI
32D-ME4056

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