LA8533A

General Description LA8533/A 1.4MHz, 3A/21V Step-Down DC-DC Converter Features LA8533/A is a current mode, step-down DC-DC converter that is designed to meet 3A output current, and utilizes PWM control scheme that switches with 1.4MHz fixed frequency. The input voltage range of LA8533/A is from 4.5V to 21V, and available in adjustable output voltage from 0.8V to VIN. The supply current is only 1mA during operation and under 20uA 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. Other features of soft-start, current limit, thermal shutdown protection, and short circuit protection are also included. To increase light-load conversion efficiency, the Power-Saving Mode (PSM) feature is automatically activated. This device can also operate with a maximum duty cycle of 100% for use in low drop-out conditions. The package is available in standard ESOP-8. l 4.5V to 21V Input Voltage Range l Continuous 3A Output Capability l 0.8V Reference Voltage l 100% Duty Cycle l 20uA Low Shutdown Current l 1mA Low Supply Current l 1.4MHz Switching Frequency in PWM Mode l Power-Saving Mode (PSM) at Light-Load l Current Mode for Excellent Response l Internal Soft-Start & Current Limit l No External Compensation Required l Support Low ESR Output Ceramic Capacitors l Short Circuit & Thermal Shutdown Protection l Standard ESOP-8 Package l Meet RoHS Standard Applications l Wireless...