EUP3472 Datasheet | Eutech Microelectronics

EUP3472 2A, 28V, 500k Hz Synchronous Step-Down Converter DESCRIPTION The EUP3472 is a 500KHz fixed frequency synchronous current mode buck regulator. The device integrates both 150mΩ high-side switch and 100mΩ low-side switch that provide 2A 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 EUP3472 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 EUP3472 is available in SOP-8 package. Features z z z z z z z z z z z z z z 2A Continuous Output Current 110ns Minimum On Time Integrated 150mΩ High Side Switch Integrated 100mΩ 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 Package Ro HS pliant and 100% Lead (Pb)-Free Halogen-Free APPLICATIONS z z z Distributed Power Systems Networking Systems FPGA, DSP, ASIC Power Supplies Typical Application Circuit Figure 1. DS3472 Ver 1.0 Jul. 2010 Typical Application Circuit (continued) Figure 2. EUP3472 Typical Application Circuit with Electrolytic Capacitors Block Diagram Figure 3. EUP3472 Functional Block Diagram DS3472 Ver 1.0 Jul. 2010 Pin Configurations Package Type Pin Configurations SOP-8 Pin Description Number 1 Pin Name BS Description High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel DMOS switch. Connect a 0.01µF or greater...