MT6315BP IC

Product Details
Product Details:

- Part Number: MT6315BP

- Sibling Variants: MT6315FP, MT6315NP, MT6315OP, MT6315TP, MT6315QP, MT6315SP, MT6315RP

- Manufacturer: MediaTek Inc. (MTK)

- Function: Secondary Power Management IC / 4-Phase Synchronous Step-Down (Buck) DC/DC Converter

- Output Current Capacity: Up to 5A per phase (dedicated high-current rails for CPU, GPU, and SRAM)

- Voltage Step Resolution: Fine 6.25 mV per step for precise Dynamic Voltage and Frequency Scaling (DVFS)

- Bus Communication: High-speed SPMI or I2C serial bus control (eFuse selectable)

- Feedback Architecture: Remote Differential Voltage Sensing to compensate for IR drop under dynamic load

- Fault Management: Dedicated FAULTB pin for direct hardware interrupt reporting to the main PMIC

- Built-in Protections: Over-Current Protection (OCP), Input Under-Voltage Lockout (UVLO), and Thermal Shutdown at 150°C

- Package Type: 45-Pin WLCSP / Fine-Pitch BGA (approx. 2.35 × 3.44 mm)

- Mounting Type: Surface Mount Technology (SMD BGA Soldering / Reballing)

Usage:

- High-Efficiency Core Regulation: Converts primary system voltage into ultra-low, ripple-free voltages required by modern Multi-Core MediaTek processors during intensive gaming and processing tasks.

- Target Devices & Compatible Platforms:

* Oppo: Reno 5 Pro, Reno 6 Pro / Reno 6 Pro 5G (Dimensity MTK editions), Reno 7 series

* Realme: Realme GT Neo (Dimensity 1200), Realme X7 Pro 5G

* Xiaomi / Redmi / POCO: Redmi K40 Gaming / K40 Pro Game Plus, POCO X3 GT, Redmi Note 10 / Note 11 series (MediaTek variants)

* Vivo / iQOO: Vivo V21 5G, Vivo X60 (MTK variants), iQOO Z-series

* Other smartphones powered by MediaTek Dimensity 1100, 1200, and Dimensity 5G platforms.

- Common Fault Symptoms & Motherboard Diagnostics:

* Dead Phone (No Power / Low Boot Pulse): Mobile phone shows no sign of life; on DC power supply, pressing the power key draws a small pulse (0.05A–0.15A) and drops back to zero because CPU core power (VCORE/VPROC) is missing.

* Dead After Flash / Bootloader Freeze: Device halts during boot after flashing because firmware fails the hardware communication handshake over SPMI/I2C or detects an active FAULTB signal.

* Inductor / Coil Short Circuit: One of the four surrounding buck coils shows direct continuity to ground (0.00 ohms), leading to severe localized heating when voltage is injected.

* Hang on Logo / Boot Loop: Unstable or sagging output voltage under initial OS boot causes processor reset before reaching the home screen.

* Suffix Specificity: Technicians must match the exact "BP" suffix during replacement; substituting other MT6315 suffixes (such as FP, NP, or OP) may fail to boot due to different preset startup voltage profiles and eFuse configura