DESCRIPTION

The LM137 series are adjustable 3-terminal negative voltage regulators capable of supplying in excess- 1.5Aover a -1.2 to -37V output voltagerange. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators. Also, LM137 regulators are supplied in standard transistor packages which are easily mounted and handled. In addition to higher performance than fixed regulators, the LM137 series offer full overload protection available only in integrated circuits. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even ifthe adjustment terminal is disconnected.

■ OUTPUT VOLTAGE ADJUSTABLE DOWN TO Vref

■ 1.5A GUARANTEED OUTPUT CURRENT

■ 0.3/V TYPICAL LOAD REGULATION

■ 0.01/V TYPICAL LINE REGULATION

■ CURRENT LIMIT CONSTANT WITH TEMPERATURE

■ RIPPLE REJECTION : 77dB

■ STANDARD 3-LEAD TRANSISTOR PACKAGES

■ EXCELLENT THERMAL REGULATION: 0.002/V

■ 50ppm/°C TEMPERATURE COEFFICIENT

LM137属于集成电路（IC） > 稳压器 - 线性。意法半导体（ST）集团制造生产的LM137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。