Description

The L4940 series of three terminal positive regulators is available in TO-220, TO-220FP and D

2PAK packages and with several fixed output voltages, making it useful in a wide range of

industrial and consumer applications. Thanks to its very low input/output voltage drop, these

devices are particularly suitable for batteries powered equipment, reducing consumption andprolonging battery life. Each type employs internal current limiting, antisaturation circuit, thermal shut-down and safe area protection.

■ Precise 5, 8.5, 10, 12 V outputs

■ Low dropout voltage (450 mV typ. at 1 A)

■ Very low quiescent current

■ Thermal shutdown

■ Short circuit protection

■ Reverse polarity protection

L4940D2T12属于集成电路（IC） > 线性 + 开关稳压器。意法半导体（ST）集团制造生产的L4940D2T12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。