代理产线

RT7237/RT7257

 2014-05-28

【基本数据】

【产品特性】

•  Current Mode Control
•  Fixed Frequency Operation : 340kHz
•  Output Adjustable from 0.8V to 15V
•  Stable with Low ESR Ceramic Output Capacitors
•  Up to 95% Efficiency
•  Programmable Soft-Start
•  Cycle-by-Cycle Over Current Protection
•  Input Under Voltage Lockout
•  Output Under Voltage Protection
•  Thermal Shutdown Protection
•  RoHS Compliant and Halogen Free


2A/3A, 17V, 340kHz Synchronous Step-Down Converter


【产品应用】

•  Wireless AP/Router
•  Set-Top-Box
•  Industrial and Commercial Low Power Systems
•  LCD Monitors and TVs
•  Green Electronics/Appliances
• Point of Load Regulation of High-Performance DSPs

【文字介绍】

The RT7237/RT7257 is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A/3A output current from a 4.5V to 17V input supply. The RT7237/RT7257's current mode architecture and external compensation allow the transient response to be optimized over a wide input range and loads. Cycle-bycycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7237/RT7257 also provides under voltage protection and thermal shutdown protection. The low current (<3μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7237/RT7257 is available in an SOP-8 (Exposed Pad) package.