MAX 77854 F ORIGINAL Mobile Phone IC
Unmatched Quality and Reliability
The MAX 77854 F ORIGINAL Mobile Phone IC is designed to deliver superior performance and reliability. Engineered to meet the highest standards, this IC ensures seamless compatibility with your mobile devices. Each unit is rigorously tested for durability, making it a dependable choice for all repair or upgrade needs. MAX 77854 F ORIGINAL Mobile Phone IC
Precision Performance for Mobile Devices
This high-quality IC offers precise functionality, making it perfect for enhancing the performance of mobile phones. Whether you need to replace an existing IC or integrate it into a new device, the MAX 77854 F delivers top-tier efficiency and responsiveness. Experience a worry-free solution for your mobile phone projects. MAX 77854 F ORIGINAL Mobile Phone IC
Designed for Versatility
The MAX 77854 F ORIGINAL Mobile Phone IC is compatible with a variety of models and applications, ensuring versatility for technicians and developers alike. Its reliable design provides consistent results, making it a must-have component for modern mobile technology. Upgrade your projects with confidence today. MAX 77854 F ORIGINAL Mobile Phone IC
The MAX77854 (specifically the MAX77854F) is a highly integrated Power Management Integrated Circuit (PMIC) manufactured by Maxim Integrated (now part of Analog Devices). It is a “small power” chip specifically engineered for the Samsung Galaxy S7 (G9300) and S7 Edge (G9350) series. MAX 77854 F ORIGINAL Mobile Phone IC
This IC is critical for the device’s survival, as it manages the complex voltage requirements of the System-on-Chip (SoC), memory, and baseband components. MAX 77854 F ORIGINAL Mobile Phone IC
Technical Specifications: MAX77854
The following table outlines the core technical parameters and application details of the original MAX77854 chip.
| Feature | Specification Details |
| Model Number | MAX77854 / MAX77854F / MAX77854EWZ |
| Component Type | Power Management Integrated Circuit (PMIC) |
| Primary Function | Voltage regulation, Buck Conversion, Charging Control |
| Compatible Models | Samsung Galaxy S7 (G9300, G930F), S7 Edge (G9350, G935F) |
| Package Type | WLP (Wafer Level Package) / BGA (Ball Grid Array) |
| Common Suffix | “F” (denotes final production revision optimized for S7) |
| Output Rails | Multi-channel (Core, I/O, Memory, Peripheral) |
| Input Voltage | Battery-powered (typically 3.4V to 4.4V range) |
| Protection Features | Overcurrent (OCP), Overvoltage (OVP), Thermal Shutdown |
| Communication | $I^2C$ Interface for dynamic voltage scaling |
| Operating Temp | -40°C to +85°C (Industrial Grade) |
Key Features and Functionality
The MAX77854 is not a simple on/off switch; it is a sophisticated regulator that performs several high-level tasks:
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Dynamic Voltage Scaling (DVS): It communicates with the phone’s processor via the $I^2C$ bus to adjust output voltages in real-time. This helps the phone conserve battery during idle states and provide “boost” power during heavy gaming or 4K recording.
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Baseband Management: It is often referred to as the “Baseband Power Chip” because it supplies the specific, stable voltages required for the modem to maintain LTE/4K cellular signals.
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Efficiency: Using high-frequency buck converters, the IC minimizes energy loss as heat, which is vital for the thin form factor of the S7 Edge.
Signs of a Faulty MAX77854 IC
Since this chip manages power distribution, its failure usually results in “dead” phone symptoms. Technicians typically look for the following:
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Charging Failures: The phone shows a charging icon but the percentage never increases, or it refuses to recognize the cable entirely.
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Sudden Shutdowns: The device powers off abruptly even when the battery shows 20%–30% remaining.
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No Power (Dead): The phone fails to boot (0.00A or very low current draw on a USB power meter).
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Overheating: High thermal output near the top-middle of the motherboard during standby.
Repair & Installation Guidelines
Replacing the MAX77854 is a Level 3 repair task involving microsoldering. Because it is a BGA (Ball Grid Array) chip, it requires precise heat management to avoid damaging the underlying PCB layers or nearby components like the CPU.
Recommended Rework Parameters:
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Station Type: Hot Air Rework Station (Calibrated).
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Temperature: $280^\circ\text{C}$ to $320^\circ\text{C}$ (depending on the alloy used).
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Airflow: Low to Medium (to prevent “flying” nearby capacitors).
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Flux: High-quality NC (No-Clean) tacky flux is essential for proper ball alignment.
Note: Always ensure the “F” revision is used for S7/S7 Edge repairs. Using a non-“F” variant or a chip meant for the Note 7 can lead to boot-loops or permanent baseband (signal) loss.
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