LM137/LM237 LM337
THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE REGULATORS
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OUTPUT VOLTAGE ADJUSTABLE DO...
LM137/LM237 LM337
THREE-TERMINAL ADJUSTABLE NEGATIVE VOLTAGE
REGULATORS
. . . . . . . . .
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
TO-3
DESCRIPTION The LM137 series are adjustable 3-terminal negative voltage
regulators capable of supplying in excess - 1.5A over a -1.2 to - 37V output voltage range. 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 if the adjustment terminal is disconnected. PIN CONNECTIONS
TO-3 (bottom view) TO-39 (bottom view)
TO-220
TO-39
TO-220 (front view)
1 - Adj 2 - Output 3 - Input
1 - Output 2 - Adj Case is input
1 - Adj 2 - Output 3 - input
Heatsink surface connected to input
March 1993
1/14
LM137-LM237-LM337
ABSOLUTE MAXIMUM RATING
Symbol VI - ...