Broadcom BCM59365: Wireless Charging PMIC in iPhone 13 Pro and 14 Pro

Why the BCM59365 is a Breakthrough in Wireless Charging

The BCM59365 plays a critical role in converting power received through wireless charging into regulated voltages required by the processor and other subsystems in the iPhone. It’s built on TSMC’s 40 nm BCD (Bipolar-CMOS-DMOS) process, the smallest and most complex BCD node commercially available — enabling both low-voltage logic and high-voltage power handling on a single die.

What sets this PMIC apart:

• Advanced integration of power management and logic
• Potential inclusion of on-chip memory, possibly RRAM (to be confirmed)
• Enables higher power density, faster charging, and better thermal performance
• Facilitates software-controlled charging behavior for improved efficiency

Technical Highlights

• Chip: Broadcom BCM59365
• Function: Wireless charging PMIC
• Found in: Apple iPhone 13 Pro, iPhone 14 Pro
• Foundry & Process: TSMC 40 nm BCD
• Packaging: Highly integrated solution, optimized for thin mobile form factors
• Innovations:
  • Potential embedded memory (TBC)
  • Complex power delivery architecture
  • Optimized for MagSafe and next-gen wireless protocols

Impact on Apple’s Wireless Charging Experience

Apple's integration of the BCM59365 reflects its continued investment in improving wireless power efficiency and performance. Users may experience:

• Faster wireless charging speeds
• Lower power loss and reduced heat
• Prolonged battery life due to smarter power delivery algorithms

These improvements stem from the tight coupling of Broadcom’s hardware with Apple’s software ecosystem — a hallmark of Apple’s vertical integration strategy.