2596, 3A Voltage Regulator IC : Tutorial 12


The LM2576 series of regulators are monolithic
integrated circuits that provide all the active functions
for a step-down (buck) switching regulator, capable of
driving 3-A load with excellent line and load
regulation. These devices are available in fixed output
voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable
output version.
Requiring a minimum number of external
components, these regulators are simple to use and
include fault protection and a fixed-frequency
The LM2576 series offers a high-efficiency
replacement for popular three-terminal linear
regulators. It substantially reduces the size of the
heat sink, and in some cases no heat sink is
A standard series of inductors optimized for use with
the LM2576 are available from several different
manufacturers. This feature greatly simplifies the
design of switch-mode power supplies.
Other features include a ±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

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  1. सर मोबाइल चार्ज वोल्टेज ज्यादा तो नही होगा और हिटसि

  2. Can u provide me circuit for variable input viltage from 50v to 120 v dc and fixed output of 12 v or 24 volt or 36 volt any of them. Total 2000 circuits required. Contact me at jsbmatrix@gmail.com

  3. Praveen Sir agr source voltage ka ampere 500 Mili Ampere ho to kya yeh circuit properly work krega. Aur kya ye out put me 3 ampere dega, Please tell me sir,
    Thank you.

  4. nice video . the only doubt is to know if it regulates the output voltage when the input voltage decrease …. does it regulates or not ? it must be a CONVERTER NOT A REGULATOR .
    but is a nice video any way thanks .

  5. Using 0-12 , 3amp and Rs401L diode bridge I get 21volt unloaded output . can I use it in 4440 double IC board?please reply me as soon as possible


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