LM2574 - SIMPLE SWITCHER 0.5A 降压电压稳压器

LM2574是TI德州仪器公司的一款转换器（集成开关）产品，LM2574是SIMPLE SWITCHER 0.5A 降压电压稳压器，本站介绍了LM2574的封装应用图解、特点和优点、功能等，并给出了与LM2574相关的TI元器件型号供参考。

LM2574 - SIMPLE SWITCHER 0.5A 降压电压稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM2574 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A 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 LM2574 series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed.

A standard series of inductors optimized for use with the LM2574 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.

产品特性

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 0.5A 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

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