Richtek RT6239 | Demoboard PCB063_V1

Description

The RT6239A is a high-performance 500kHz, 9A step-down regulator with internal power switches and synchronous rectifiers. It features quick transient response using its Advanced Constant On-Time (ACOT™) control architecture that provides stable operation with small ceramic output capacitors and without complicated external compensation, among other benefits. With internal 30mΩ switches and 12mΩ synchronous rectifiers, the RT6239A displays excellent efficiency and good behavior across a range of applications, especially for low output voltages and low duty cycles. Cycle-by-cycle current limit provides protection against shorted outputs, input under-voltage lockout, externally-adjustable soft-start, output under- and over-voltage protection, and thermal shutdown provide safe and smooth operation in all operating conditions. The RT6239A is available in the UQFN-14L 2x3 (FC) package, with exposed thermal pad.

Features

• Fast Transient Response
• Advanced Constant On-Time (ACOT™) Control
• 4.5V to 18V Input Voltage Range
• Adjustable Output Voltage from 0.7V to 8V
• 9A Output Current
• 30mΩInternal High-Side N-MOSFET and 12mΩInternal Low-Side N-MOSFET
• Steady 500kHz Switching Frequency
• Up to 95% Efficiency
• Optimized for All Ceramic Capacitors
• Externally-Adjustable, Pre-Biased Compatible Soft-Start
• Cycle-by-Cycle Current Limit
• Input Under-Voltage Lockout
• Output Over-and Under-Voltage Protection
• Power Good Output
• Thermal Shutdown

More information

• Datasheet
• IC product information