LM2854MHX-500

• 2.95V to 5.5V input voltage range
• The maximum load current is 4A
• Wide-bandwidth voltage mode control loop, partially internally compensated
• Fixed switching frequency is 500 kHz or 1 MHz
• 35mΩ integrated MOSFET switch
• Adjustable output voltage as low as 0.8V
• Optimized initial accuracy and temperature drift of the reference voltage
• External soft-start control and tracking capabilities
• Enable pins and lags
• The low standby current is 230μA
• Pre-biased load start function
• Combined UVLO, OCP and thermal shutdown
• 100% duty cycle capability
• eTSSOP - 16 Exposed Pad Package

illustrate

PowerWise for LM2854 ® SIMPLE SWITCHER ® The buck regulator is a 500 kHz or 1 MHz step-down switching regulator capable of coaxing 4A loads with excellent power conversion efficiency, line and load regulation, and output accuracy. The LM2854 can accept input voltage rails between 2.95V and 5.5V and provides adjustable and highly accurate output voltages as low as 0.8V. Establishing an external soft-start with a small capacitor is conducive to controlled start-up, and the LM2854 can enter the pre-biased output voltage to start normally. Partial internal compensation reduces external passive components and board space, typically the amount necessary for a voltage mode step-down converter application, but maintains flexibility to cope with ceramic and/or electrolytic load capacitance. Period-by-cycle peak current limiting for non-destructive protection against overcurrent or short-circuit faults enables comparators to simplify sequencing applications. The LM2854 is available in a TSSOP-16 package with exposed pads, which improves the thermal performance of the voltage regulator.

apply

• Low voltage from 5V or 3.3V iron POL gauge
• ASIC/FPGA/DSP/microprocessor cores or I/O power supplies for local solutions
• Broadband networks and communication infrastructure
• Portable computer