LM2576

LM2576, step-down voltage regulator, 1.23V to 37V, 3A, TO263-5

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PartNumber:: LM2576

Brand:: National Semiconductor - NS | Pack: TO | D/C: 11+

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Products Upload time: 2012-06-06

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Part Number:LM2576
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Product Summary

The LM2576 is a step-down voltage regulator, provides all the active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. This device is available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. The applications of the LM2576 include simple high-efficiency step-down (buck) regulator, efficient pre-regulator for linear regulators, on-card switching regulators, positive to negative converter (buck-boost).

Parametrics

LM2576 absolute maximum ratings: (1)Maximum Supply Voltage: LM2576, 45V; LM2576HV, 63V; (2)ON /OFF Pin Input Voltage: －0.3V ≤ V ≤+VIN; (3)Output Voltage to Ground (Steady State): －1V; (4)Power Dissipation: Internally Limited; (5)Storage Temperature Range: －65℃ to +150℃; (6)Maximum Junction Temperature: 150℃.

Features

LM2576 features: (1)3.3V, 5V, 12V, 15V, and adjustable output versions; (2)Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ±4% max over line and load conditions; (3)Guaranteed 3A output current; (4)Wide input voltage range, 40V up to 60V for HV version; (5)Requires only 4 external components; (6)52 kHz fixed frequency internal oscillator; (7)TTL shutdown capability, low power standby mode; (8)High efficiency; (9)Uses readily available standard inductors; (10)Thermal shutdown and current limit protection; (11)P+ product enhancement tested.