开关稳压器 SIMPLE SWITCHER 1A Step-Down Voltage Regulator 5-TO-220 -40 to 125
LM2575-N 的特性
3.3V， 5V， 12V， 15V， and_Adjustable Output Versions
Adjustable Version Output Voltage Range，
?1.23V to 37V (57V for HV Version) ±4%_Max Over
?Line and_Load Conditions
Specified 1A Output Current
Wide Input Voltage Range， 40V up to 60V for HV Version
Requires Only 4 External Components
52 kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability， Low Power Standby Mode
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and_Current Limit Protection
P+ Product Enhancement Tested
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LM2575-N 的说明
The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator， capable of driving a 1A load with excellent line and_load regulation. These devices are available in fixed output voltages of 3.3V， 5V， 12V， 15V， and_an adjustable output version.
Requiring a minimum number of external components， these regulators are simple to use and_include internal frequency compensation and_a fixed-frequency oscillator.
The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink， and_in many cases no heat sink is required.
A standard series of inductors optimized for use with the LM2575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a specified ±4%_tolerance on output voltage within specified input voltages and_output load conditions， and_±10%_on the oscillator frequency. External shutdown 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 under fault conditions.
