●Description
●The LM2854 PowerWise™ SIMPLE SWITCHER® buck regulator is a 500-kHz or 1-MHz step-down switching voltage regulator capable of driving up to a 4-A load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LM2854 can accept an input voltage rail between 2.95 V and 5.5 V, and deliver an adjustable and highly accurate output voltage as low as 0.8 V. Externally established soft-start with a small capacitor facilitates controlled start-up, and the LM2854 is capable of starting gracefully into a prebiased output voltage. Partial internal compensation reduces the number of external passive components and PC board space typically necessary in a voltage mode buck converter application, yet preserving flexibility to deal with ceramic and/or electrolytic based load capacitors.
●Features
●• Input Voltage Range of 2.95 V to 5.5 V
●• Maximum Load Current of 4 A
●• Wide Bandwidth Voltage Mode Control Loop, Partial Internal Compensation
●• Fixed Switching Frequency of 500 kHz or 1 MHz
●• 35-mΩ Integrated MOSFET Switches
●• Adjustable Output Voltage Down to 0.8 V
●• Optimized Reference Voltage Initial Accuracy and Temperature Drift
●• External Soft-Start Control With Tracking Capability
●• Enable Pin With Hysteresis
●• Low Standby Current of 230 µA
●• Pre-Biased Load Start-up Capability
●• Integrated UVLO, OCP, and Thermal Shutdown
●• 100% Duty Cycle Capability
●• HTSSOP-16 Exposed Pad Package
●Applications
●• Low Voltage POL Regulation from 5-V or 3.3-V Rail
●• Local Solution for FPGA/DSP/ASIC/µP Core or I/O Power
●• Broadband Networking and Communications Infrastructure
●• Portable Computing
Part 3D Model
