降压式 DC-DC
功能特点
产品名称:降压式 DC-DC
产品型号:LM2575
产品描述:
The HG2571 seriesofregulatorsaremonolithicintegratedcircuits that provide all the active functions for a step-down(buck)switchingregulator,capableofdriving 2A loadwithexcellent line and load regulation. These devices are availableinfixedoutputvoltagesof3.3V,5V,12V,andanadjustable output version.Requiring a minimum number of external components, theseregulators are simple to use and include internal frequencycompensation and a fixed-frequency oscillator.The HG2571 seriesoffersahigh-efficiencyreplacementforpopular three-terminal linear regulators. It substantially reducesthe size of the heat sink, and in some cases no heatsink is required.A standard series of inductors optimized for use with theHG2571 areavailablefromseveraldifferentmanufacturers.This feature greatly simplifies the design of switch-modepower supplies.Other features include a guaranteed ±4% tolerance on outputvoltage within specified input voltages and output loadconditions, and ±10% on the oscillator frequency. Externalshutdown is included, featuring 50 μA (typical) standby current.The output switch includes cycle-by-cycle current limiting,as well as thermal shutdown for full protection underfault conditions.
参数:
Maximum Supply Voltage 45V
ON /OFF Pin Input Voltage ?0.3V ≤ V ≤ +VIN
Output Voltage to Ground
(Steady State) ?1V
Power Dissipation Internally Limited
Storage Temperature Range ?65°C to +150°C
Maximum Junction Temperature 150°C
封装: TO-220 TO-263
热搜元器件
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