LA8509

LA8509 380KHz, 18V/3A Synchronous Step-Down DC-DC Converter General Description Features The LA8509 is a current mode, synchronous step-down DC-DC converter that is designed to meet 3A output current, and utilizes PWM control scheme that switches with 380KHz fixed frequency. The input voltage range of LA8509 is from 4.5V to 18V, and available in adjustable output voltage from 0.925V to 12V. The supply current is only 1.2mA during operation and under 1uA in shutdown. This device provides an enable function that can be controlled by external logic signal. It also provides excellent regulation during line or load transient due to the current mode operation. Other features of current limit, soft-start, thermal shutdown protection, and short circuit protection are also included. Due to the low RDS(ON) of the internal power MOSFET, this device provides high efficiency step-down applications. It is available in SOP-8 package. l Continuous 3A Output Capability l 0.925V Reference Voltage l 4.5V to 18V Input Voltage Range l Adjustable Output from 0.925V to 12V l 380KHz Oscillation Frequency l 1uA Low Shutdown Current l 1.2mA Low Supply Current l Current Mode for Excellent Response l Support Low ESR Output Ceramic Capacitors l Internal Current Limit l Soft-Start l Short Circuit Protection l Thermal Shutdown Protection l SOP-8 Package l Meet RoHS Standard Applications l Broadband Communication Device l LCD TV / Monitor l Storage Device l Wireless Application Ordering Information M...