LM2575T-12

Product Summary

The LM2575T-12 regulator is monolithic integrated circuit that provides all the active functions for a step-down(buck) switching regulator, capable of driving 3A load withexcellent line and load regulation. The LM2575T-12 is available in fixed output voltages of 3.3V, 5V, 12V, 15V, and anadjustable output version.Requiring a minimum number of external components, the LM2575T-12 is simple to use and include internal frequency compensation and a fixed-frequency oscillator.The LM2575T-12 offers a high-efficiency replacement forpopular three-terminal linear regulators. LM2575T-12 substantially reduces the size of the heat sink, and in some cases no heat sink is required. A standard series of inductors optimized for use with LM2575T-12 is available from several different manufacturers. This feature greatly simplifies the design of switch-modepower supplies. Applications include simple high-efficiency step-down regulator, efficient pre-regulator for linear regulators, on-card switching regulators, positive to negative convert, isolated flyback converter using minimum number of external components and negetive boost converter.

Parametrics

LM2575T-12 absolute maximum ratings: (1)maximum supply voltage: 45V; (2)output voltage to ground: -1V; (3) power dissipation: internally limited; (4)storage temperature range: 65℃~150℃; (5)maximum junction temperature: 150℃; (6) Lead Temperature: 260℃; (7) minimum ESD rating: 2kV.

Features

LM2575T-12 features: (1)3.3V, 5V, 12V, 15V, and adjustable output versions; (2)Adjustable version output voltage range,1.23V to 37V (57V for HV version) ±4% max overline and load conditions; (3)Guaranteed 3A output current; (4)Wide input voltage range, 40V up to 60V forHV version; (5)Requires only 4 external components; (6)52 kHz fixed frequency internal oscillator; (7)TTL shutdown capability, low power standby mode; (8)High efficiency; (9)Uses readily available standard inductors; (10)Thermal shutdown and current limit protection; (11)P+ Product Enhancement tested.

Diagrams