LM2854MH-500/NOPB

Step-Down DC/DC Converters Integrated Switch up to 6V Input Max., LM Series, Texas Instruments### 直流/直流开关调节器转换器（集成开关），Texas InstrumentsTexas Instruments 的此系列高度集成的高效开关稳压器包括步升（升压）、步降（降压）、步升/降（增压/降压）和反相类型，为每个直流稳压器应用提供高效的解决方案。

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