Mobile Phone IC For PM660 Original
The Qualcomm PM660 is a highly integrated Power Management Integrated Circuit (PMIC) typically paired with the Qualcomm Snapdragon 660 and Snapdragon 630 processors. It is a critical component found in mid-range devices like the Xiaomi Redmi Note 7, Redmi Note 5 Pro, and various Oppo/Vivo handsets.
The PM660 functions as the primary power distributor, managing battery charging, system-level voltage regulation, and the power-on sequence.
PM660 Technical Specifications Summary
The following table details the original electrical and physical specifications of the PM660 (specifically variant PM-660-0-219WLPSP).
| Feature / Parameter | Official Specification |
| Manufacturer | Qualcomm Technologies, Inc. |
| Package Type | 219-pin WLPSP (Wafer Level Chip Scale Package) |
| Input Voltage Range | 3.0V to 5.5V (Standard Li-ion/Polymer Battery Range) |
| Buck Converters | 6 to 10 Programmable Switch-Mode Supplies |
| LDO Regulators | 18 to 22 Low-Dropout Linear Regulators |
| Max Output Current | Up to 3.0A on high-power channels |
| Communication Bus | SPMI (System Power Management Interface) |
| Switching Frequency | Approximately 1.0 MHz (Typical) |
| Efficiency | Up to 95% peak efficiency |
| Operating Temp | -40°C to +85°C (Ambient) |
| Integrated Logic | Fuel Gauge, Charging Logic, and ADC |
Key Functional Blocks
The PM660 is designed to reduce the overall motherboard footprint by integrating multiple power-related tasks into a single chip.
1. Dynamic Voltage Regulation
The IC supports Dynamic Voltage Scaling (DVS), allowing the processor to request specific voltage levels (typically between $0.8V$ and $1.2V$) based on the current workload. This is essential for maintaining the high efficiency associated with the Snapdragon 660’s “Kryo” architecture.
2. Advanced Charging & Battery Management
Unlike simpler PMICs, the PM660 often includes an integrated Fuel Gauge and support for Qualcomm Quick Charge protocols. It monitors battery temperature ($BATT\_THERM$) and cell voltage ($VBATT$) to ensure safe high-speed charging.
3. System Housekeeping
It manages several “always-on” and housekeeping functions, including:
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Real-Time Clock (RTC): Maintains time even when the device is off.
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Power-On Reset (POR): Controls the startup timing of the main SoC.
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ADC: An integrated Analog-to-Digital Converter monitors internal temperatures and system health.
Repair & Troubleshooting Insights
In professional mobile repair, the PM660 is a frequent replacement part for devices with “No Power” or “Short Circuit” issues.
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Boot Issues: If the PM660 fails to output the $VREG\_S4$ (typically 1.8V) or $VREG\_S1$ rails, the device will not boot or show any signs of life.
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Interchangeability: Note that the PM660 and PM660L are different chips. The “L” version is a secondary companion PMIC (Companion/Light) that handles display and flashlight drivers; they are not interchangeable.
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Soldering Note: The 219-pin WLPSP package is extremely sensitive. Technicians usually recommend a reballing temperature of 183°C (leaded) or 217°C (lead-free) with a high-quality stencil to prevent “bridging” between the tiny solder balls.
