EUP3476 Datasheet | Eutech Microelectronics

3A, 28V, 500k Hz Synchronous Step-Down Converter DESCRIPTION The EUP3476 is a 500KHz fixed frequency synchronous current mode buck regulator. The device integrates both 135mΩ high-side switch and 90mΩ low-side switch that provide 3A of continuous load current over a wide operating input voltage of 4.5V to 28V.The internal synchronous power switch increases efficiency and eliminates the need for an external Schottky diode. Current mode control provides fast transient response and cycle-by-cycle current limit. The EUP3476 Features short circuit and thermal protection circuits to increase system reliability. Externally programmable soft-start allows for proper power on sequencing with respect to other power supllies and avoids input inrush current during startup. In shutdown mode, the supply current drops below 1µA. The EUP3476 is available in SOP-8 package with the exposed pad. Features 3A Continuous Output Current 110ns Minimum On Time Integrated 135mΩ High Side Switch Integrated 90mΩ Low Side Switch Wide 4.5V to 28V Operating Input Range Output Adjustable from 0.8V to 24V Up to 95% Efficiency Programmable Soft-Start <1µA Shutdown Current Available in 500KHz Fixed Switching Frequency Thermal Shutdown and Over Current Protection Input Under Voltage Lockout Available in SOP-8 (EP) Package Ro HS pliant and 100% Lead (Pb)-Free Halogen-Free Typical Application Circuit APPLICATIONS Distributed Power Systems Networking Systems FPGA, DSP, ASIC Power Supplies DS3476 Ver 1.6 May 2012 Figure 1. Typical Application Circuit (continued) Figure 2. EUP3476 Typical Application Circuit with Electrolytic Capacitors Block Diagram Figure 3. EUP3476 Functional Block Diagram DS3476 Ver 1.6 May 2012 Pin Configurations Package Type SOP-8 (EP) Pin Configurations Pin Description Number 1 3 4 9 (Exposed Pad) 5 6 7 Pin Name BS IN SW GND FB P EN SS Description High-Side Gate Drive Boost Input. BS supplies the drive for the high-side...