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