RT6543B RT6543BGQW P7= Marking P7= IC

The RT6543B RT6543BGQW P7= Marking P7= IC Charging IC is a high-efficiency PWM controller designed for modern power management applications. Unlike traditional current-mode PWMs, it works without using current sense resistors, which reduces power loss and improves overall efficiency.

This IC can drive synchronous rectifier MOSFETs and supports diode emulation mode during light load conditions to save even more power. It also includes built-in protection features such as UVLO (Under Voltage Lockout), OVP (Over Voltage Protection), UVP (Under Voltage Protection), OTP (Over Temperature Protection), and current limit control.

Packaged in a compact WQFN-20L 3x3, the RT6543B is ideal for efficient, space-saving power designs.

Marking Code: P7=

Technical Summary:

• Model: RT6543B / RT6543BGQW
• Type: PWM Controller / Charging IC
• Efficiency: High, no current-sense resistor required
• MOSFET Control: Supports synchronous rectifiers
• Modes: Diode Emulation for light-load efficiency
• Protections: UVLO, OVP, UVP, OTP, Current Limit
• Package: WQFN-20L (3x3 mm)
• Marking: P7=
• Applications: CPU Power, System Core, and Notebook Power Circuits