LM20125 Datasheet | Texas Instruments

.ti. SNVS525E - OCTOBER 2007 - REVISED MARCH 2013 LM20125/LM20125Q 5A, 500k Hz Power Wise® Synchronous Buck Regulator Check for Samples: LM20125 Features - 2 LM20125Q is AEC-Q100 Qualified and Manufactured on an Automotive Grade Flow - Input Voltage Range 2.95V to 5.5V - Accurate Current Limit Minimizes Inductor Size - 97% Efficiency with 500 k Hz Switching Frequency - 32 mΩ Integrated FET Switches - Starts up into Pre-Biased Loads - Output Voltage Tracking - Peak Current Mode Control - Adjustable Output Voltage Down to 0.8V - Adjustable Soft-Start with External Capacitor - Precision Enable Pin with Hysteresis - Integrated OVP, UVLO, Power Good and Thermal Shutdown - HTSSOP 16-Pin Exposed Pad Package APPLICATIONS - Simple to Design, High Efficiency Point of Load Regulation from a 5V or 3.3V Bus - High Performance DSPs, FPGAs, ASICs and Microprocessors - Broadband, Networking and Optical munications Infrastructure DESCRIPTION The LM20125 is a full featured 500 k Hz synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be pensated to be stable with virtually any type of output capacitor. For most cases, pensating the device only requires two external ponents, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems. The device Features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good...