Mobile Phone IC For PM8150 Original

PM8150 Original Technical Specifications

The table below outlines the core electrical and mechanical specifications of the original PM8150 103 variant.

Feature / Parameter	Specification
Manufacturer	Qualcomm Technologies, Inc.
Model Number	PM8150 (Primary PMIC)
Package Type	161-pin FOWPSP (Fan-Out Wafer Level Pico-Scale Package)
Package Dimensions	4.49 mm × 5.07 mm × 0.55 mm
SMPS Channels	10 Buck Converters (2 HFS510 + 8 FTS510)
LDO Regulators	18 Linear Regulators (Pseudo-capless design)
Input Voltage Range	3.0V to 5.5V (Standard Battery Range)
Output Voltage Range	0.8V to 3.3V (Adjustable via SPMI)
Clock Management	38.4 MHz XO controller + 6 Clock outputs
Communication Bus	SPMI (System Power Management Interface)
Protection Circuitry	OVP, UVP, OTP (Multi-stage thermal control)
Operating Temp	-40°C to +125°C

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Functional Breakdown

The PM8150 acts as the “brain” of the device’s power distribution. Its responsibilities are categorized into four primary sections:

1. High-Precision Power Rails

The IC utilizes Switch-Mode Power Supplies (SMPS) to deliver high current to the processor.

• HF-SMPS: High-frequency bucks designed for small external components.

• FT-SMPS: Flexible, fast-transient bucks used primarily for CPU and GPU core voltages, capable of adjusting $V_{out}$ in microseconds to match processor load.

2. General Housekeeping & Monitoring

It features an integrated Analog-to-Digital Converter (ADC) with an analog multiplexer. This allows the system to monitor “health” metrics, such as:

• Internal die temperature.

• Board-level thermistors ($XO\_THERM$).

• Voltage levels on critical power nodes.

3. Clock and Timing Support

Unlike simple regulators, the PM8150 manages the system timing. It supports a 38.4 MHz Crystal Oscillator (XO) and provides dedicated low-noise clock outputs for the RF (Radio Frequency) and Baseband (Modem) sections. It also generates the Sleep Clock used for low-power standby modes.

4. Advanced Packaging (FOWPSP)

The PM8150 utilizes Deca Technologies’ M-Series Fan-Out packaging. This technology encapsulates the silicon die and its sidewalls, protecting it from the physical stresses of “cracking” during thermal cycles or drops—a common issue in older BGA chips.

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Repair and Troubleshooting Data

In the repair industry, the PM8150 is a common replacement part for devices that are “dead” or stuck at a low current draw (e.g., 0.01A – 0.05A on a USB ammeter).

Common Failure Symptoms:

• No Power / Boot: Device fails to initiate the power-on sequence via the SPMI bus.

• Partial Shorts: Excessive heat near the PMIC when the battery is connected.

• Clock Failure: If the 38.4 MHz output is missing, the CPU will not initiate the “handshake” with the modem, resulting in no service or boot loops.

Professional Note: The PM8150 is highly sensitive to heat during reballing. Use a low-to-medium temperature leaded solder paste ($183°C$) for replacement to prevent warping the thin 0.55 mm package.