Richtek RT6242

Description

The RT6242A/B is a synchronous step-down converter with Advanced Constant On-Time (ACOTTM) mode control. The ACOTTM provides a very fast transient response with few external components. The low impedance internal MOSFET supports high efficiency operation with wide input voltage range from 4.5V to 18V. The proprietary circuit of the RT6242A/B enables to support all ceramic capacitors. The output voltage can be adjustable between 0.7V and 8V. The soft-start is adjustable by an external capacitor.

Features

• 4.5V to 18V Input Voltage Range
• 12A Output Current
• 12mΩ Internal High-Side N-MOSFET and 5.4mΩInternal Low-Side N-MOSFET
• Advanced Constant On-Time Control
• Fast Transient Response
• Support All Ceramic Capacitors
• Up to 95% Efficiency
• Adjustable Switching Frequency from 300kHz to 700kHz
• Adjustable Output Voltage from 0.7V to 8V
• Adjustable Soft-Start
• Pre-bias Start-Up
• Adjustable Current Limit from 6A to 15A
• Cycle-by-Cycle Over Current Protection
• Power Good Output
• Input Under-Voltage Lockout
• Hiccup Mode Under-Voltage Protection
• Thermal Shutdown Protection

Typical applications

• Computer Peripherals
• Industrial and Commercial Low Power Systems, Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs
• Green Electronics/Appliances
• LCD Monitors and TVs

More information

• IC product information