Mobile Phone IC – PM7150A-102 Original
The Qualcomm PM7150A-102 is a sophisticated Power Management Integrated Circuit (PMIC) designed for premium mid-range smartphones. It primarily supports the Qualcomm Snapdragon 730 and 730G chipsets, managing critical power distribution to the CPU, GPU, and memory subsystems.
Because it is a “Primary PMIC,” it is often responsible for the initial “boot-up” sequence of the phone. In the repair industry, it is widely known for being a common failure point in devices that suffer from sudden death, stuck at 0.01A-0.05A current draw, or fast-charging failure.
PM7150A-102 Original Technical Specifications
The table below outlines the core electrical and physical parameters of the original component.
| Feature / Parameter | Specification |
| Manufacturer | Qualcomm Technologies, Inc. |
| Full Part Number | PM7150A-102-01 (Revision 102) |
| Package Type | 161-pin FOWPSP (Fan-Out Wafer Level Picoscale Package) |
| Dimensions | 4.40 mm × 5.07 mm × 0.54 mm |
| Core Supply Voltage (VIN) | 3.0V to 4.4V (Typical Li-ion/Polymer Battery Range) |
| Communication Interface | SPMI (System Power Management Interface) |
| Switching Regulators | 7-10 Buck Converters (depending on SoC config) |
| Linear Regulators | 18-22 Low Dropout (LDO) Regulators |
| Operating Temp Range | -40°C to +125°C |
| PWM Frequency | 1.8 MHz to 2.2 MHz (High Frequency for small inductors) |
| Protection Circuitry | OVP, UVP, Over-Temp (150°C shutdown), Short-Circuit |
Key Functional Roles
The PM7150A is a multi-rail regulator that serves as the “heart” of the device’s electrical system. Its primary duties include:
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Dynamic Voltage Scaling (DVS): It adjusts the voltage for the CPU/GPU in real-time. For example, it might drop the voltage to $0.6V$ during sleep to save battery or boost it to $1.1V$ during high-performance gaming.
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Clock Management: Integrated 38.4 MHz Crystal Oscillator (XO) controller that provides timing for the entire motherboard. If this block fails, the phone will not even be detected by a computer (no USB handshake).
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LDO Precision: It provides ultra-clean power (low noise) for sensitive components like the Camera Image Signal Processor (ISP) and the Display Driver IC (DDIC).
Device Compatibility & Common Failures
This IC is found in some of the most popular handsets from 2019 to late 2021.
Common Supported Devices:
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Xiaomi: Redmi K20, Mi 9T, Poco X2, Poco X3.
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Samsung: Galaxy A71, Galaxy A80, Galaxy M51.
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Vivo: X50 Pro, V20 series.
Common Failure Symptoms:
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Dead Boot: The device shows no signs of life and pulls a constant, low current (usually 10mA to 80mA) from a DC power supply.
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Partial Charging: The device recognizes the charger but the battery percentage never increases, or it is stuck at 1%.
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No Camera/WiFi: If specific LDO rails within the PM7150A fail, the phone may boot, but specific peripherals (like the camera) will report an “Internal Error.”
Professional Repair Note
The 102 suffix is critical. While the PM7150 exists in other versions (like the 002 or 103), they are generally not interchangeable due to different firmware-level power sequencing. Using the wrong revision can result in a “Boot Loop” or a permanent short to the CPU.
When soldering, use a high-quality BGA stencil and leaded solder paste ($183°C$). Since the package is a FOWPSP, it is extremely thin; excessive pressure during placement can easily crack the internal silicon die.
