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屬于集成電路（IC） > 穩(wěn)壓器 - 線性。意法半導體（ST）集團制造生產(chǎn)的LM137穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。