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.
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|Part number||Order||Vin (Min) (V)||Vin (Max) (V)||Vout (Min) (V)||Vout (Max) (V)||Iout (Max) (A)||Regulated outputs (#)||Switching frequency (Min) (kHz)||Switching frequency (Max) (kHz)||Iq (Typ) (mA)||Features||Control mode||Duty cycle (Max) (%)||Operating temperature range (C)||Rating||Package Group||Type||Package size: mm2:W x L (PKG)|
Over Current Protection
|Voltage Mode||98||-40 to 125||Catalog||
DDPAK/TO-263 | 5
TO-220 | 5
5DDPAK/TO-263: 155 mm2: 15.24 x 10.16 (DDPAK/TO-263 | 5)
See datasheet (TO-220)