LM2575-N

SIMPLE SWITCHER 1A 降压电压稳压器

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.

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3.3V, 5V, 12V, 15V, and Adjustable Output Versions

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Adjustable Version Output Voltage Range,

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 1.23V to 37V 57V for HV Version ±4% Max Over

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 Line and Load Conditions

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Specified 1A Output Current

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Wide Input Voltage Range, 40V up to 60V for HV Version

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Requires Only 4 External Components

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52 kHz Fixed Frequency Internal Oscillator

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TTL Shutdown Capability, Low Power Standby Mode

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High Efficiency

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Uses Readily Available Standard Inductors

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Thermal Shutdown and Current Limit Protection

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P+ Product Enhancement Tested

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