RT7297B

Design Sample & Tools Buy ® RT7297B 3A, 18V, 1.2MHz Synchronous Step-Down Converter General Description The RT7297B is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 3A output current from a 4.5V to 18V input supply. The RT7297B's current mode architecture and external compensation allow the transient response to be optimized over a wide input voltage range and loads. Cycleby-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7297B 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 RT7297B is available in an SOP-8 (Exposed Pad) package. Ordering Information RT7297B Package Type SP : SOP-8 (Exposed Pad-Option 1) Lead Plating System Z : ECO (Ecological Element with Halogen Free and Pb free) H : UVP Hiccup L : UVP Latch-Off Note : Richtek products are :  RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Marking Information RT7297BxZSP : Product Number RT7297Bx ZSPYMDNN x : H or L YMDNN : Date Code Features  ±1.5% High Accuracy Reference Voltage  4.5V to 18V Input Voltage Range  3A Output Current  Integrated N-MOSFET Switches  Current Mode Control  Fixed Frequency Operation : 1.2MHz  Output Adju...