LM2575,LM2576: Series SIMPLE SWITCHER® 3-A Step-Down Voltage Regulator

LM2575,LM2576: Series SIMPLE SWITCHER® 3-A Step-Down Voltage Regulator

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 oscillator.
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 required.
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 conditions.
Straight Leads 5-Lead TO-220 Package LM2575T-XX or LM2575HVT-XX
DDPAK/TO-263 Package 5-Lead Surface-Mount Package LM2575S-XX or LM2575HVS-XX

 

Features

  • 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range,1.23 V to 37 V (57 V for HV Version) ±4% Maximum Over Line and Load Conditions
  • Specified 3-A Output Current
  • Wide Input Voltage Range: 40 V Up to 60 V 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
  • Create a Custom Design with WEBENCH Tools
  • Thermal Shutdown and Current Limit Protection
  • P+ Product Enhancement Tested

Applications

  • Simple High-Efficiency Step-Down (Buck) Regulator
  • Efficient Pre-regulator for Linear Regulators
  • On-Card Switching Regulators
  • Positive-to-Negative Converter (Buck-Boost)

 

Immagine Parte # fabbricante Descrizione Azione Prezzo Acquistare
D38999/26FC4AB
TE Connectivity / DEUTSCH
Circular MIL Spec Connector DTS 5C 4#16 PIN PLUG
0
1+
$5.6016
5+
$5.2752
10+
$4.9452
25+
$4.7808
Dettaglio
D3899924WJ37SNL
SOURIAU
Circular MIL Spec Connector
0
1+
$15.0444
2+
$14.7348
5+
$14.4396
10+
$14.1576
25+
$13.7148
Dettaglio
C48-10R14-4P7-106
Cinch
Circular MIL Spec Connector 26500 4C 9#20 3#16 PIN RECP
0
1+
$6.6444
5+
$6.4476
10+
$6.2532
25+
$6.0576
50+
$5.6664
Dettaglio
75-068628-12J
Amphenol Industrial
Circular MIL Spec Connector ER 26C 26#16 SKT PLUG
0
1+
$5.7144
5+
$5.5548
10+
$5.3772
25+
$5.2104
50+
$4.8732
Dettaglio
EN3645F6GN16AA
SOURIAU
Circular MIL Spec Connector
0
1+
$11.9616
2+
$11.7156
5+
$11.4804
10+
$11.2560
25+
$10.9044
Dettaglio
D38999/26GD5PA
TE Connectivity / DEUTSCH
Circular MIL Spec Connector DTS 5C 5#16 PIN PLUG
0
1+
$6.6216
5+
$6.4260
10+
$6.2316
25+
$6.0372
50+
$5.6472
Dettaglio
D38999/20FJ61AB
TE Connectivity / DEUTSCH
Circular MIL Spec Connector DTS 61C 61#20 PI
0
1+
$6.6252
5+
$6.4308
10+
$6.2352
25+
$6.0408
50+
$5.6508
Dettaglio
8LT013B35SB
SOURIAU
Circular MIL Spec Connector
0
1+
$12.1656
5+
$11.8056
10+
$11.4480
25+
$11.0904
50+
$10.3740
Dettaglio
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