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LM2576

Semtech Corporation
Part Number LM2576
Manufacturer Semtech Corporation
Description 1A & 3A Miniconverter Switching Regulators
Published Mar 22, 2005
Detailed Description POWER MANAGEMENT Description The LM2575/6 series switching regulators are monolithic integrated circuits designed for us...
Datasheet PDF File LM2576 PDF File

LM2576
LM2576

Overview
POWER MANAGEMENT Description The LM2575/6 series switching regulators are monolithic integrated circuits designed for use in “buck” or “buck/ boost” regulator applications requiring accurate output voltages over combined variations of line, load and temperature.
This unique series greatly simplifies switching power supply design.
The LM2575 has a maximum output current of 1A and the LM2576 is rated for 3A.
1A & 3A Miniconverter Switching Regulators Features u Pin for pin replacement for National’s LM2575/6 u DC-to-DC buck or buck/boost converter requiring only 4 support components Fixed or adjustable voltages Preset output voltages of 3.
3V, 5V and 12V Wide output voltage range, 1.
23V to 35V 82% typical efficiency @ 5V out Wide input voltage range, 4V to 40V Inhibit/enable control pin Industrial temperature range TO-220 and TO-263 packages series LM2575 & LM2576 u u u u The LM2575/6 series miniconverters include a u switching regulator and compensation network all within u the same package.
Just add a choke, catch diode and u two capacitors to obtain an efficient DC-to-DC converter.
u The current limit and thermal shutdown features of the LM2575/6 series fully protect the device against overstress conditions.
Applications u u u u Micro controller power supplies Medical equipment Industrial power supplies Instrumentation power supplies The LM2575/6 series offers an alternative to popular 3 terminal linear regulators by providing higher efficiency with reduced heatsink size.
In many applications a heat sink will not be required.
Typical Application Circuits LM2575 L1 D1 C IN C OUT 330µH 3A 68µF 330µF LM2576 100µH 7A 120µF 1,000µF Revision 1, January 2001 1 www.
semtech.
com LM2575 & LM2576 POWER MANAGEMENT Absolute Maximum Ratings Parameter Input Voltage On/Off Pi n Input Voltage Output Voltage to C ommon (Steady State) Power D i ssi pati on Thermal Resi stance Juncti on to Ambi ent TO-220 TO-263 Thermal Resi stance Juncti on to C ase TO-220 TO-263 Operati ng...


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