Richtek RT6257A

Description

The RT6257A/B is a high-efficiency, monolithic synchronous step-down DC-DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply. The RT6257A/B adopts ACOT architecture to allow the transient response to be improved and keep in constant frequency. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault conditions also include output under voltage protection and thermal shutdown.

Features

• 4.5V to 18V Input Voltage Range
• 6A Output Current
• Constant-On-Time Mode to Enables Fast Transient Response
• Low Output Ripple and Allows Ceramic Output Capacitor
• 500kHz Switching Frequency
• High Efficient Internal Power MOSFET Switch
• Optimized for Lower Duty Cycle Applications
• Integrated 30m/20mMOSFETs
• Adjustable Output Voltage from 0.6V to 5V
• Internal Soft-Start (1.5ms typ.)
• Built-In UVP/OTP
• Input Under Voltage Lockout
• TSOT23-6 (FC) Package

Typical applications

• LCD TV
• Portable TV
• Access Point Router/ Set Top Box/ DSL Modem

More information

• Datasheet
• IC product information