LM2576T-12

SIMPLE SWITCHER® 3A降压型稳压器 SIMPLE SWITCHER® 3A Step-Down Voltage Regulator

The is a 3A low component count Step-down Regulator 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 specified ±4% tolerance on output voltage within specified input voltages and output load conditions and ±10% on the oscillator frequency. External shutdown is included, featuring 50µA typical standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. This monolithic integrated circuit that provide all the active functions for a step-down buck switching regulator, capable of driving 3A load with excellent line and load regulation.

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TTL shutdown capability, low power standby

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High efficiency

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Uses readily available standard inductors

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Thermal shutdown and current limit protection

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P+ Product enhancement tested

This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.