HomedatasheetLM2574MX-3.3/NOPB

LM2574MX-3.3/NOPB Datasheet

DC/DC Switching Converters
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Description

The LM2574MX-3.3/NOPB of regulators are monolithic integrated circuits that provide all the active functions for a stepdown (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 LM2574MX-3.3/NOPB 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 LM2574MX-3.3/NOPB is available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a guaranteed ±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. LM2574MX-3.3/NOPB Features • 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• Guaranteed 0.5A output current • Wide input voltage range, 40V, up to 60V for regulator HV version • Requires only 4 external components • 52 kHz fixed frequency internal oscillator• TTL shutdown capability, low power standby mode• High efficiency• Thermal shutdown and current limit protection• Uses readily available standard inductors LM2574MX-3.3/NOPB Applications • Simple high-efficiency step-down (buck)• Efficient pre-regulator for linear regulators• On-card switching regulators• Positive to negative converter (Buck-Boost)
Features

Parameters

[{"Name":"Input Voltage MAX","Value":"40 V"},{"Name":"Switching Frequency","Value":"52 kHz"},{"Name":"Output Voltage","Value":"3.3 V, 5 V, 12 V, 15 V"},{"Name":"Output Current","Value":"0.5 A"},{"Name":"Maximum Operating Temperature","Value":"+ 125 C"},{"Name":"Input Voltage MIN","Value":"- 0.3 V"},{"Name":"Minimum Operating Temperature","Value":"- 40 C"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

ON SEMICONDUCTOR

ON Semiconductor - ON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions.

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