DC-DC voltage regulator chip lm2576

  summary
Lm2576 series voltage regulator is a monolithic integrated circuit, which can provide buck and various functions, drive 3A load, excellent linearity and load adjustment ability
The fixed output voltage of these devices is 3
3V, 5V, 12V and 15V, and the type number of adjustable output
These regulators contain a frequency compensator and a fixed frequency oscillator, which minimizes the number of external components and is easy to use
The efficiency of lm2576 is much higher than the popular three-stage linear regulator, and it is an ideal alternative Generally, there is no need or only a small size of external heat sink

The standard series inductors that have been optimized for use with the lm2576 are provided by several different inductor generators
This feature greatly simplifies the design of switching power supply
Other features include: guaranteed output voltage & plusmn under specified input voltage and output voltage load conditions; 4% error and & plusmn of oscillator frequency; 10% error, including external shutdown circuit, with 50 & micro features; A (typical) standby current

The output switch includes current limiting week by week and tearful shutdown function to provide complete protection in fault state

characteristic
3
3V, 5V, 12V, 15V and adjustable output voltage models
Adjustable output model output voltage range under linear and load conditions
1
23 ~ 37V (HV model 57V) max
& plusmn; 4%
Guaranteed 3A output current
The input voltage range is wide, from 40V to 60V of HV model
Only 4 external devices are required to support
52khz fixed frequency internal oscillator
TTL shutdown capability, low power standby mode
High frequency
Use now available standard inductors
Thermal shutdown and current limit