NEGATIVE ADJUSTABLE VOLTAGE REGULATOR
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1 NEGATIVE USTABLE K AK HVK AHVK IP337K IP337AK IP337HVK IP337AHVK / LM137K / LM137AK / LM137HVK / LM137AHVK / LM337K / LM337AK / LM337HVK / LM337AHVK FEATURES 1.5A Output Current Guaranteed Internal Thermal Overload Protection Output Short Circuit Protected Hermetic Metal TO3 Package Screening Options Available APPLICATIONS Adjustable Power Supplies System Power Supplies Precision Voltage / Current Regulators DESCRIPTION The 137/337 Series regulators are adjustable 3 terminal voltage regulators capable of supplying in excess of -1.5A over an output voltage range of -1.2V to -37V (HV Series, -47V). The regulators are exceptionally easy to apply requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. Every effort has been made to make these devices easy to use and difficult to damage. Internal current limiting and power limiting coupled with true thermal limiting prevents damage due to overloads or shorts, even if the regulators are not fastened to a heat sink. ABSOLUTE MAXIMUM RATGS (T C = 25 C unless otherwise stated) V I - V O Input Output Voltage Differential Standard 40V HV Series 50V I O Output Current Internally Limited PD Power Dissipation Internally Limited T J Operating Junction 137 Series -55 to +150 C Temperature Range 337 Series 0 to +125 C Tstg Storage Temperature Range -65 to +150 C THERMAL PROPERTIES Symbols Parameters Min. Typ. Max. Units R θjc Thermal Resistance, Junction To Case 3 C/W ** This datasheet supersedes document 2831 reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Page 1 of 7
2 NEGATIVE USTABLE ELECTRICAL CHARACTERISTICS (1)(3) (T C = 25 C unless otherwise stated) LM137,, LM137HV, HV Symbols Parameters Test Conditions Min. Typ Max. Units I OUT = 10mA V REF Reference Voltage 10mA I OUT I MAX, P P MAX, V V (V -V OUT ) V MAX Line Regulation V (2) 3V (V -V OUT ) V MAX, %/V I OUT = 10mA V OUT 5V mv IOUT Load Regulation (2)(3) 10mA I OUT I MAX V OUT 5V % V OUT 5V mv V OUT 5V % V = V, I OUT = 1.5A, Thermal Regulation %/W P D = 20W, T A = 25 C, 10ms Pulse V OUT = -10V C = 0 60 Ripple Rejection db f = 120Hz C = 10µF I Adjust Pin Current I Adjust Pin Current Change 10mA I OUT I MAX V (V -V OUT ) 40V 2 5 µa 3V (V -V OUT ) 50V (HV Series) 3 6 I M Minimum Load Current (V - V OUT ) 40V (V - V OUT ) 10V ma (V - V OUT ) 15V I CL TEMP TIME e n Current Limit (V - V OUT ) = 40V (V - V OUT ) = 50V (HV Series) Temperature Stability 0.6 Long Term Stability T A = 125 C, 1000Hrs RMS Output Noise (% of V OUT ) T A = 25 C, 10Hz f 10KHz A % Notes The denotes the specifications which apply over the full operating temperature range. (1) Test conditions unless otherwise stated: V - V OUT = 5V, I OUT = 0.5A, P MAX = 20W, I MAX = 1.5A (2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating effects are covered under thermal regulation specifications. Load regulation is measured at 1 / 8 below the bottom of the package. (3) V MAX = 40V for LM137,, LM137A, A, LM337, IP337, LM337A, IP337A V MAX = 50V for LM137HV, HV, LM137AHV, AHV, LM337HV, IP337HV, LM337AHV, IP337AHV Page 2 of 7
3 NEGATIVE USTABLE ELECTRICAL CHARACTERISTICS (1)(3) (T C = 25 C unless otherwise stated) LM137A, A, LM137AHV, AHV Symbols Parameters Test Conditions Min. Typ Max. Units I OUT = 10mA V REF Reference Voltage 10mA I OUT I MAX, P P MAX, V V (V -V OUT ) V MAX Line Regulation V (2) 3V (V -V OUT ) V MAX, %/V I OUT = 10mA V OUT 5V 5 25 mv IOUT Load Regulation (2)(3) 10mA I OUT I MAX V OUT 5V % V OUT 5V mv V OUT 5V % V = V, I OUT = 1.5A, Thermal Regulation %/W P D = 20W, T A = 25 C, 10ms Pulse V OUT = -10V C = Ripple Rejection db f = 120Hz C = 10µF I Adjust Pin Current I Adjust Pin Current Change 10mA I OUT I MAX V (V -V OUT ) 40V µa 3V (V -V OUT ) 50V (HV Series) 2 6 I M Minimum Load Current (V - V OUT ) 40V (V - V OUT ) 10V ma (V - V OUT ) 15V I CL TEMP TIME e n Current Limit (V - V OUT ) = 40V (V - V OUT ) = 50V (HV Series) Temperature Stability Long Term Stability T A = 125 C, 1000Hrs RMS Output Noise (% of V OUT ) T A = 25 C, 10Hz f 10KHz A % Notes The denotes the specifications which apply over the full operating temperature range. (1) Test conditions unless otherwise stated: V - V OUT = 5V, I OUT = 0.5A, P MAX = 20W, I MAX = 1.5A (2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating effects are covered under thermal regulation specifications. Load regulation is measured at 1 / 8 below the bottom of the package. (3) V MAX = 40V for LM137,, LM137A, A, LM337, IP337, LM337A, IP337A V MAX = 50V for LM137HV, HV, LM137AHV, AHV, LM337HV, IP337HV, LM337AHV, IP337AHV Page 3 of 7
4 NEGATIVE USTABLE ELECTRICAL CHARACTERISTICS (1)(3) (T C = 25 C unless otherwise stated) LM337, IP337, LM337HV, IP337HV Symbols Parameters Test Conditions Min. Typ Max. Units I OUT = 10mA V REF Reference Voltage 10mA I OUT I MAX, P P MAX, V V (V -V OUT ) V MAX Line Regulation V (2) 3V (V -V OUT ) V MAX, %/V I OUT = 10mA V OUT 5V mv IOUT Load Regulation (2)(3) 10mA I OUT I MAX V OUT 5V % V OUT 5V mv V OUT 5V % V = V, I OUT = 1.5A, Thermal Regulation %/W P D = 20W, T A = 25 C, 10ms Pulse V OUT = -10V C = 0 60 Ripple Rejection db f = 120Hz C = 10µF I Adjust Pin Current I Adjust Pin Current Change 10mA I OUT I MAX V (V -V OUT ) 40V 2 5 µa 3V (V -V OUT ) 50V (HV Series) 3 6 I M Minimum Load Current (V - V OUT ) 40V (V - V OUT ) 10V ma (V - V OUT ) 15V I CL TEMP TIME e n Current Limit (V - V OUT ) = 40V (V - V OUT ) = 50V (HV Series) Temperature Stability 0.6 Long Term Stability T A = 125 C, 1000Hrs RMS Output Noise (% of V OUT ) T A = 25 C, 10Hz f 10KHz A % Notes The denotes the specifications which apply over the full operating temperature range. (1) Test conditions unless otherwise stated: V - V OUT = 5V, I OUT = 0.5A, P MAX = 20W, I MAX = 1.5A (2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating effects are covered under thermal regulation specifications. Load regulation is measured at 1 / 8 below the bottom of the package. (3) V MAX = 40V for LM137,, LM137A, A, LM337, IP337, LM337A, IP337A V MAX = 50V for LM137HV, HV, LM137AHV, AHV, LM337HV, IP337HV, LM337AHV, IP337AHV Page 4 of 7
5 NEGATIVE USTABLE ELECTRICAL CHARACTERISTICS (1)(3) (T C = 25 C unless otherwise stated) LM337A, IP337A, LM337AHV, IP337AHV Symbols Parameters Test Conditions Min. Typ Max. Units I OUT = 10mA V REF Reference Voltage 10mA I OUT I MAX, P P MAX, V V (V -V OUT ) V MAX Line Regulation V (2) 3V (V -V OUT ) V MAX, %/V I OUT = 10mA V OUT 5V 5 25 mv IOUT Load Regulation (2)(3) 10mA I OUT I MAX V OUT 5V % V OUT 5V mv V OUT 5V % V = V, I OUT = 1.5A, Thermal Regulation %/W P D = 20W, T A = 25 C, 10ms Pulse V OUT = -10V C = Ripple Rejection db f = 120Hz C = 10µF I Adjust Pin Current I Adjust Pin Current Change 10mA I OUT I MAX V (V -V OUT ) 40V µa 3V (V -V OUT ) 50V (HV Series) 2 6 I M Minimum Load Current (V - V OUT ) 40V (V - V OUT ) 10V ma (V - V OUT ) 15V I CL TEMP TIME e n Current Limit (V - V OUT ) = 40V (V - V OUT ) = 50V (HV Series) Temperature Stability Long Term Stability T A = 125 C, 1000Hrs RMS Output Noise (% of V OUT ) T A = 25 C, 10Hz f 10KHz A % Notes The denotes the specifications which apply over the full operating temperature range. (1) Test conditions unless otherwise stated: V - V OUT = 5V, I OUT = 0.5A, P MAX = 20W, I MAX = 1.5A (2) Regulation is measured at constant junction temperature, using pulse testing at a low duty cycle. Changes in output voltage due to heating effects are covered under thermal regulation specifications. Load regulation is measured at 1 / 8 below the bottom of the package. (3) V MAX = 40V for LM137,, LM137A, A, LM337, IP337, LM337A, IP337A V MAX = 50V for LM137HV, HV, LM137AHV, AHV, LM337HV, IP337HV, LM337AHV, IP337AHV Page 5 of 7
6 NEGATIVE USTABLE APPLICATIONS FORMATION High Stability Regulator The output stability, load regulation, line regulation, thermal regulation, temperature drift, long term drift, and noise, can be improved by a factor of 6.6 over the standard regulator configuration. This assumes a zener has 20PPM/ C maximum drift and about 10 times lower noise than the regulator. Multiple Tracking Regulators In the application shown below, regulator #2 to N will track regulator #1 to within ±24mV initially, and to ±60mV over all load line, and temperature conditions. If any regulator output is shorted to ground, all other outputs will drop to -2V. Load regulation of regulators #2 to N will be improved by VOUT / 1.25V compared to a standard, so regulator #1 should be the one which has the lowest load current. R3 1.5k V V OUT V ( ) * R2 = 7V R2 * R1 1k VOUT 908 Ω 9.08 x 10-3 TANTALUM V OUT V 2µF 2µF V V OUT REG #1 C3 10µF R2 R1 120 Ω C1 TANTALUM V OUT1 TANTALUM V V OUT REG #2 V OUT2 Dual Tracking Supply V V +V OUT +V OUT 2µF V V OUT REG #N TANTALUM V OUT N R1** 100 Ω * 2.2 µf D1 10µF R2 5k R3 5k Current Regulator V 10µF V R4 5k V OUT R5** 100 Ω * 2.2 µf D2 V OUT C1 TANATALUM V V I ( ) OUT (+) R S I = 65µA V R S 0.8 Ω 250Ω R S * Solid Tantalum ** R1 & R5 maybe trimmed slightly to improve tracking Page 6 of 7
7 NEGATIVE USTABLE MECHANICAL DATA Dimensions in mm (inches) (0.99) (1.05) (0.42) (0.44) 1.52 (0.06) 3.43 (0.135) 6.35 (0.25) 9.15 (0.36) (1.52) (1.54) 29.9 (1.177) 30.4 (1.197) (0.655) (0.675) (case) 0.97 (0.060) 1.10 (0.043) (0.875) max (0.151) 4.09 (0.161) 7.92 (0.312) (0.50) TO3 (TO-204AA) Pin 1 =. Pin 2 = VOUT Case = V Page 7 of 7
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