LM137AG

NEGATIVE ADJUSTABLE VOLTAGE REGULATOR IP137G IP137AG IP137HVG IP137AHVG / / / / LM137G LM137AG LM137HVG LM137AHVG FEATURES • • • • • 1.5A Output Current Guaranteed Internal Thermal Overload Protection Output Short Circuit Protected Hermetic Metal TO257-AA Package Screening Options Available APPLICATIONS • • • Adjustable Power Supplies System Power Supplies Precision Voltage / Current Regulators DESCRIPTION The 137 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 RATINGS (TC = 25°C unless otherwise stated) VI - VO IO PD TJ Tstg Input – Output Voltage Differential Standard HV Series Output Current Power Dissipation Operating Junction Temperature Range Storage Temperature Range 40V 50V Internally Limited Internally Limited -55 to +150°C -65 to +150°C THERMAL PROPERTIES Symbols RθJC Parameters Thermal Resistance, Junction To Case Min. Typ. Max. 5 Units °C/W ** This datasheet supersedes document 2831 Semelab Limited 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. S emelab Coventry Road, Lutterworth, Leicestershire, LE17 4JB Semelab Limited Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Document Number 8378 Issue 1 Page 1 of 5 Website: http://www.semelab-tt.com NEGATIVE ADJUSTABLE VOLTAGE REGULATOR ELECTRICAL CHARACTERISTICS(1)(3) (TC = 25°C unless otherwise stated) LM137, IP137, LM137HV, IP137HV Symbols VREF Parameters Reference Voltage Test Conditions IOUT = 10mA 10mA ≤ IOUT ≤ IMAX, P ≤ PMAX, 3V ≤ (VIN-VOUT) ≤ VMAX 3V ≤ (VIN-VOUT) ≤ VMAX, IOUT = 10mA VOUT ≤ 5V Min. -1.225 Typ -1.250 Max. -1.275 Units V • -1.200 -1.250 0.010 -1.300 0.020 0.050 25 0.5 50 1.0 0.02 ∆VOUT ∆VIN Line Regulation (2) • %/V mV % mV % %/W dB 0.020 15 0.3 ∆VOUT ∆IOUT Load Regulation (2)(3) 10mA ≤ IOUT ≤ IMAX VOUT ≥ 5V VOUT ≤ 5V VOUT ≥ 5V • • 20 0.3 0.002 60 66 77 65 0.5 2 3 2.5 1.2 1.5 0.24 0.2 2.2 0.4 0.4 0.6 0.3 0.003 Thermal Regulation Ripple Rejection IADJ Adjust Pin Current VIN = -14.58V, IOUT = 1.5A, PD = 20W, TA = 25°C, 10ms Pulse VOUT = -10V f = 120Hz CADJ = 0 CADJ = 10µF • • 10mA ≤ IOUT ≤ IMAX 100 5 5 6 5 3 3.2 A 0.8 mA µA • • • • • • • • • ∆IADJ Adjust Pin Current Change 3V ≤ (VIN-VOUT) ≤ 40V 3V ≤ (VIN-VOUT) ≤ 50V (HV Series) IMIN Minimum Load Current (VIN - VOUT) ≤ 40V (VIN - VOUT) ≤ 10V (VIN - VOUT) ≤ 15V ICL Current Limit (VIN - VOUT) = 40V (VIN - VOUT) = 50V (HV Series) ∆VOUT ∆TEMP ∆VOUT ∆TIME en Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) TA = 125°C, 1000Hrs TA = 25°C, 10Hz ≤ f ≤ 10KHz 1.0 % Notes Notes The ● denotes the specifications which apply over the full operating temperature range. (1) (2) Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A 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 base of the package on the output pin. VMAX = 40V for LM137, IP137, LM137A, IP137A VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV (3) S emelab Coventry Road, Lutterworth, Leicestershire, LE17 4JB Semelab Limited Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com Document Number 8378 Issue 1 Page 2 of 5 NEGATIVE ADJUSTABLE VOLTAGE REGULATOR ELECTRICAL CHARACTERISTICS(1)(3) (TC = 25°C unless otherwise stated) LM137A, IP137A, LM137AHV, IP137AHV Symbols VREF Parameters Reference Voltage Test Conditions IOUT = 10mA 10mA ≤ IOUT ≤ IMAX, P ≤ PMAX, 3V ≤ (VIN-VOUT) ≤ VMAX 3V ≤ (VIN-VOUT) ≤ VMAX, IOUT = 10mA VOUT ≤ 5V Min. -1.238 Typ -1.250 Max. -1.262 Units V ● -1.220 -1.250 0.005 -1.280 0.010 0.030 25 0.5 50 1.0 0.02 mV % mV % %/W ∆VOUT ∆VIN Line Regulation (2) %/V ● 0.010 5 0.1 ∆VOUT ∆IOUT Load Regulation (2)(3) 10mA ≤ IOUT ≤ IMAX VOUT ≥ 5V VOUT ≤ 5V VOUT ≥ 5V ● ● 10 0.2 0.002 60 70 66 80 65 0.2 1.0 2 2.5 1.2 1.5 0.24 0.2 2.2 0.4 0.4 0.6 0.3 0.003 Thermal Regulation VIN = -14.58V, IOUT = 1.5A, PD = 20W, TA = 25°C, 10ms Pulse VOUT = -10V f = 120Hz CADJ = 0 CADJ = 10µF ● Ripple Rejection IADJ Adjust Pin Current dB 100 2 5 6 5 3 3.2 1.0 0.8 1.5 1.0 % A mA µA ● 10mA ≤ IOUT ≤ IMAX ● ● ● ● ● ● ● ● ● ∆IADJ Adjust Pin Current Change 3V ≤ (VIN-VOUT) ≤ 40V 3V ≤ (VIN-VOUT) ≤ 50V (HV Series) IMIN Minimum Load Current (VIN - VOUT) ≤ 40V (VIN - VOUT) ≤ 10V (VIN - VOUT) ≤ 15V ICL Current Limit (VIN - VOUT) = 40V (VIN - VOUT) = 50V (HV Series) ∆VOUT ∆TEMP ∆VOUT ∆TIME en Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) TA = 125°C, 1000Hrs TA = 25°C, 10Hz ≤ f ≤ 10KHz Notes Notes The ● denotes the specifications which apply over the full operating temperature range. (1) (2) Test conditions unless otherwise stated: VIN - VOUT = 5V, IOUT = 0.5A, PMAX = 20W, IMAX = 1.5A 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 base of the package on the output pin. VMAX = 40V for LM137, IP137, LM137A, IP137A VMAX = 50V for LM137HV, IP137HV, LM137AHV, IP137AHV (3) S emelab Coventry Road, Lutterworth, Leicestershire, LE17 4JB Semelab Limited Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com Document Number 8378 Issue 1 Page 3 of 5 NEGATIVE ADJUSTABLE VOLTAGE REGULATOR APPLICATIONS INFORMATION 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. C3 10µF R2 * 2µ F R2 7V SOLID TANTALUM R1 1k 1% 1µF ADJ –VIN VIN V OUT REG #1 1N4002 C1 1µ F SOLID TANTALUM R1 120 Ω –VOUT1 R3 1.5k 1% ADJ –V IN V IN V OUT IP137 IP137 ( VOUT ) – 908 Ω * R2 = 9.08 x 10 -3 –V OUT 1µ F 2µF ADJ V IN 1N4002 IP137 IP137 SOLID TANTALUM –VOUT2 V REG #2 OUT IP137 IP137 Dual Tracking Supply IP137 IP137 +V IN V IN ADJ R1** 100 Ω 1% V OUT +V 2µF ADJ OUT 1µF 1N4002 SOLID TANTALUM –VOUT N V IN V OUT REG #N * 2.2 µF D1 1N4002 IP137 IP137 10µF R2 5k 1% R3 5k Current Regulator C1 1µ F SOLID TANATALUM V OUT RS 1.25 V RS I (+) 10µF R4 5k 1% 2.2 µF * R5** 100 Ω 1% ADJ –V IN VIN V OUT ADJ D2 1N4002 (–) V IN IIP137 P137 –VOUT I = 65µA + 0.8 Ω ≤ R S ≤ 250Ω IP137 IP137 * Solid Tantalum ** R1 & R5 maybe trimmed slightly to improve tracking S emelab Coventry Road, Lutterworth, Leicestershire, LE17 4JB Semelab Limited Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com Document Number 8378 Issue 1 Page 4 of 5 NEGATIVE ADJUSTABLE VOLTAGE REGULATOR MECHANICAL DATA Dimensions in mm (inches) 10.41 (0.410) 10.67 (0.420) 4.83 (0.190) 5.08 (0.200) 0.89 (0.035) 1.14 (0.045) 16.38 (0.645) 16.89 (0.665) 13.38 (0.527) 13.64 (0.537) 3.56 (0.140) Dia. 3.81 (0.150) 10.41 (0.410) 10.92 (0.430) 123 12.07 (0.500) 19.05 (0.750) 0.64 (0.025) Dia. 0.89 (0.035) 2.54 (0.100) BSC 3.05 (0.120) BSC TO-257AA Pin 1 = ADJ Pin 2 = VIN Pin 3 = VOUT Case = VIN S emelab Coventry Road, Lutterworth, Leicestershire, LE17 4JB Semelab Limited Telephone +44 (0) 1455 556565 Fax +44 (0) 1455 552612 Email: sales@semelab-tt.com Website: http://www.semelab-tt.com Document Number 8378 Issue 1 Page 5 of 5