LA8509A

LA8509A 340KHz, 18V/3A Synchronous Step-Down DC-DC Converter General Description Features The LA8509A 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 340KHz fixed frequency. The input voltage range of LA8509A is from 4.5V to 18V, and available in adjustable output voltage from 0.925V to 12V. The supply current is only 1.3mA during operation and under 0.3uA 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 ESOP-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 340KHz Oscillation Frequency l 0.3uA Low Shutdown Current l 1.3mA 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 ESOP-8 Package l Meet RoHS Standard Applications l Broadband Communication Device l LCD TV / Monitor l Storage Device l Wireless Application Ordering Infor...