L387A集成电路（IC）的线性+开关稳压器规格书PDF中文资料

L387A属于集成电路（IC）的线性+开关稳压器。由意法半导体集团制造生产的L387A稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

DESCRIPTION

The L387A is a very low drop voltage regulator in aPentawatt package specially designed to pro

vide stabilized 5V supplies in consumer and in dustrial applications. Thanks to its very low in

put/output voltage drop this device is very useful in battery powered equipment, reducing con

sumption and prolonging battery life. A reset out put makes the L387A particularly suitable for mi

croprocessor systems. This output provides a re set signal when power is applied (after an exter

nal programmable delay) and goes low when

PRECISE OUTPUT VOLTAGE (5 V±4)

VERY LOW DROPOUT VOLTAGE

OUTPUT CURRENT IN EXCESS OF 500mA

POWER-ON, POWER-OFF INFORMATION (RESET FUNCTION)

HIGH NOISE IMMUNITY ON RESET DELAY CAPACITOR