 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| SG137A/SG237A/SG337A SG137/SG237/SG337 1.5 AMP NEGATIVE ADJUSTABLE REGULATOR DESCRIPTION The SG137A family of negative adjustable regulators will deliver up to 1.5A output current over an output voltage range of -1.2V to -37V. Silicon General has made significant improvements in these regulators compared to previous devices, such as better line and load regulation, and a maximum output voltage error of 1%. The SG137 family uses the same chip design and guarantees maximum output voltage error of 2%. Every effort has been made to make these devices easy to use and difficult to damage. Internal current and power limiting coupled with true thermal limiting prevents device damage due to overloads or shorts even if the regulator is not fastened to a heat sink. The SG137A/137 family of products are ideal complements to the SG117A/ 117 adjustable positive regulators. FEATURES * * * * * 1 % output voltage tolerance 0.01%/V line regulation 0.5% load regulation 0.02%/W thermal regulation Available in hermetic TO-220 HIGH RELIABILITY FEATURES -SG137A/SG137 Available to MIL-STD-883 and DESC SMD Scheduled for MIL-M38510 QPL listing MIL-M38510/11804BYA - JAN137K LMI level "S" processing available BLOCK DIAGRAM 2/92 Rev 1.1 2/94 Copyright (c) 1994 1 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570 LINFINITY Microelectronics Inc. SG137A/SG137 SERIES ABSOLUTE MAXIMUM RATINGS (Note 1) Power Dissipation .......................................... Internally Limited Input to Output Voltage Differential .................................... 40V Storage Temperature Range ............................ -65C to 150C Note 1. Exceeding these ratings could cause damage to the device. Operating Junction Temperature Hermetic (K, R, T, L, IG-Packages) ........................... 150C Lead Temperature (Soldering, 10 Seconds) ............. 300C THERMAL DATA K Package: Thermal Resistance-Junction to Leads, JC ................ 3.0C/W Thermal Resistance-Junction to Ambient, JA ............... 35C/W R Package: Thermal Resistance-Junction to Leads, JC ................ 5.0C/W Thermal Resistance-Junction to Ambient, JA .............. 40C/W T Package: Thermal Resistance-Junction to Leads, JC ................. 15C/W Thermal Resistance-Junction to Ambient, JA ............ 120C/W IG Package: Thermal Resistance-Junction to Leads, JC ................ 3.5C/W Thermal Resistance-Junction to Ambient, JA .............. 42C/W L Package: Thermal Resistance-Junction to Leads, JC ................. 35C/W Thermal Resistance-Junction to Ambient, JA ............ 120C/W Note A. Junction Temperature Calculation: TJ = TA + (PD x JA). Note B. The above numbers for JC are maximums for the limiting thermal resistance of the package in a standard mounting configuration. The JA numbers are meant to be guidelines for the thermal performance of the device/pcboard system. All of the above assume no ambient airflow. RECOMMENDED OPERATING CONDITIONS (Note 2 & 3) Input Voltage Range ..............................-(VOUT + 3.5V) to -36V Operating Junction SG137A/SG137 SG237A/SG237 SG337A/SG337 Temperature Range ............................................ -55C to 150C ............................................ -25C to 150C ............................................. 0C to 125C Note 2. Range over which the device is functional. Note 3. These ratings are applicable for junction temperatures of less than 135C. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG137A/SG137 with -55C TA 150C, SG237A/ SG237 with -25C TA 150C, SG337A/SG337 with 0C TA 125C, |V IN - VOUT| = 5.0V, and for IOUT = 500mA (K, R, and IG power packages) and IOUT = 100mA (T and L packages). Although power dissipation is internally limited, these specifications are applicable for power dissipations of 2 for the T and L packages, and 20 for the K, R, and IG packages. IMAX is 1.5A for the K, R, and IG packages and 0.5A for the T and L packages. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) Parameter Reference Voltage (Note 6) Line Regulation (Note 4, 6) Load Regulation (Note 4) Test Conditions IOUT = 10mA, TA = 25C 3V |VIN - VOUT| 40V, 10mA IOUT IMAX 3V |V IN - VOUT| 40V, IOUT IMAX TA = 25C 10mA IOUT IMAX |VOUT| 5V, TA = 25C |VOUT| 5V, TA = 25C |VOUT| 5V |VOUT| 5V TA = 25C, 10ms pulse VOUT = -10V, f =120Hz CADJ = 0, TA = 25C CADJ = 10F TA = 25C 3V |VIN - V OUT| 40V 10mA IOUT IMAX SG137A/SG237A SG137/SG237 Units Min. Typ. Max. Min. Typ. Max. -1.238 -1.250 -1.262 -1.225 -1.250 -1.275 V -1.220 -1.250 -1.280 -1.200 -1.250 -1.300 V 0.005 0.01 5 25 0.1 0.5 10 50 0.2 1.0 0.002 0.02 60 70 66 80 65 1.0 0.2 0.01 0.02 15 25 0.3 0.5 20 50 0.3 1.0 0.002 0.02 60 77 65 2 0.5 %/V mV % mV % %/W dB dB A A A Thermal Regulation (Note 5) Ripple Rejection 66 100 5 2 Adjust Pin Current Adjust Pin Current Change (Note 6) 100 5 5 2/92 Rev 1.1 2/94 Copyright (c) 1994 2 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570 LINFINITY Microelectronics Inc. SG137A/SG137 SERIES ELECTRICAL CHARACTERISTICS Parameter Minimum Load Current Current Limit (continued) Test Conditions |VIN - VOUT| 40V |VIN - VOUT| 10V |VIN - VOUT| 15V K, P, R, IG Packages T, L, Packages |VIN - VOUT| 40V, TJ = 25C K, P, R, IG Packages T, L, Packages TA = 125C, 1000 Hours TA = 25C, 10Hz f 10 KHz (Note 5) SG137/SG237 SG137A/SG237A Min. Typ. Max. Min. Typ. Max. 2.5 5.0 2.5 5.0 1.2 3 1.2 3.0 1.5 0.5 0.24 0.15 2.2 0.8 0.4 0.25 0.6 0.3 0.003 3.2 1.5 1.0 0.5 1.5 1.0 1.5 0.5 0.24 0.15 2.2 0.8 0.4 0.25 0.6 0.3 0.003 Units mA mA A A A A % % % Temperature Stability (Note 5) Long Term Stability (Note 5) RMS Output Noise (% of VOUT) 1.0 Parameter Reference Voltage (Note 6) Line Regulation (Note 4, 6) Load Regulation (Note 4) Test Conditions IOUT = 10mA, TA = 25C 3V |VIN - VOUT| 40V, 10mA IOUT IMAX 3V |V IN - VOUT| 40V, IOUT IMAX TA = 25C 10mA IOUT IMAX |VOUT| 5V, TA = 25C |VOUT| 5V, TA = 25C |VOUT| 5V |VOUT| 5V TA = 25C, 10ms pulse VOUT = -10V, f =120Hz CADJ = 0, TA = 25C CADJ = 10F TA = 25C 3V |VIN - V OUT| 40V 10mA IOUT IMAX |VIN - VOUT| 40V |VIN - VOUT| 10V |VIN - VOUT| 15V K, P, R, IG-Packages T, L-Packages |VIN - VOUT| 40V, TJ = 25C K, P, R, IG- Packages T, L-Packages TA = 125C, 1000hr TA = 25C, 10Hz f 10KHz (Note 5) SG337 SG337A Units Min. Typ. Max. Min. Typ. Max. V -1.238 -1.250 -1.262 -1.213 -1.250 -1.287 V -1.220 -1.250 -1.280 -1.200 -1.250 -1.300 0.005 0.01 5 25 0.1 0.5 50 10 0.2 1.0 0.002 0.02 60 70 66 80 65 1.0 0.2 2.5 1.2 2.2 0.8 0.01 0.04 15 50 0.3 1.0 20 70 0.3 1.5 0.003 0.04 60 77 65 2 0.5 2.5 1 2.2 0.8 0.4 0.17 0.6 0.3 0.003 %/V mV % mV % %/W dB dB A A A mA mA A A A A % % % Thermal Regulation (Note 5) Ripple Rejection 66 100 5 2 5 3 3.5 1.5 1.0 0.5 1.5 1.0 1.5 0.5 0.15 0.10 Adjust Pin Current Adjust Pin Current Change (Note 6) Minimum Load Current Current Limit 100 5 5 10 6 1.5 0.5 Temperature Stability (Note 5) Long Term Stability (Note 5) RMS Output Noise (% of VOUT) 0.24 0.5 0.15 0.25 0.6 0.3 0.003 1.0 Note 4. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 5. These parameters, although guaranteed, are not tested in production. Note 6. I MAX for K, R, and IG packages is VIN - VOUT = 3V / 1.5A and VIN - VOUT = 40V / 240mA. For T and L packages IMAX is V IN - VOUT = 3V / 500mA and V IN - VOUT = 40V / 150mA. 2/92 Rev 1.1 2/94 Copyright (c) 1994 3 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570 LINFINITY Microelectronics Inc. SG137A/SG137 SERIES CHARACTERISTIC CURVES FIGURE 1. INPUT/OUTPUT DIFFERENTIAL VS. OUTPUT CURRENT FIGURE 2. REFERENCE VOLTAGE VS. TEMPERATURE FIGURE 3. CURRENT VS. INPUT/OUTPUT DIFFERENTIAL FIGURE 4. * OUTPUT VOLTAGE DEVIATION VS. OUTPUT CURRENT * The SG137A has load regulation compensation which makes the typical unit read close to zero. This band represents the typical production spread. FIGURE 5. INPUT/OUTPUT DIFFERENTIAL VS. OUTPUT CURRENT FIGURE 6. ADJUSTMENT CURRENT VS. TEMPERATURE APPLICATION INFORMATION OUTPUT VOLTAGE The output voltage is determined by two external resistors, R1 & R2(see Figure 7). Where: VREF =Reference Voltage, IADJ = Adjustment Pin Current. In most applications, the second term is small enough to be ignored, typically about 0.5% of VOUT. In more critical applications, the exact formula should be used, with IADJ equal to 65A. Solving for R2 yields: R2 = VOUT - VREF VREF + IADJ R1 FIGURE 6 The exact formula for the output voltage is: VOUT = VREF ( R2 + R1 R1 ) +I ADJ (R2) Smaller values of R1 and R2 will reduce the influence of IADJ on the output voltage, but the no-load current drain on the regulator will be increased. Typical values for R1 are between 100 and 300, giving 12.5 mA and 4.2mA no-load current respectively. There is an additional consideration in selecting R1 the minimum load current specification of the regulator. The operating current of 2/92 Rev 1.1 2/94 Copyright (c) 1994 4 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570 LINFINITY Microelectronics Inc. SG137A/SG137 SERIES APPLICATION INFORMATION (continued) EXAMPLES: 1. A precision 10V regulator to supply up to 1Amp load current. a. Select R1 = 100 to minimize effect of IADJ b. Calculate R2 = VOUT - VREF 10V - 1.25V = = 704W (VREF/R1) + IADJ (1.25V/100W) + 65mA the SG137A flows from input to output. If this current is not absorbed by the load, the output of the regulator will rise above the regulated value. The current drawn by R1 and R2 is normally high enough to absorb the current, but care must be taken in no- load situations where R1 and R2 have high values. The maximum value for the operating current, which must be absorbed, is 5mA for the SG137A, If input-output voltage differential is less than 10V, the operating current that must be absorbed drops to 3mA. The output stability, load regulation, line regulation, thermal 2. A 15V regulator to run off batteries and supply 50mA. VIN MAX = 25V a. To minimize battery drain, select R1 as high as possible R1 = 1.25V 3mA = 417, use 404, 1% TYPICAL APPLICATIONS 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 whose drift and noise is considerably better than the regulator itself. The LM329B has 20PPM/C maximum drift and about 10 times lower noise than the regulator. In the application shown Figure 8, regulators #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 regulator, so regulator #1 should be the one which has the lowest load current. FIGURE 8 - MULTIPLE TRACKING REGULATORS FIGURE 9 - HIGH STABILITY REGULATOR FIGURE 10 - CURRENT REGULATOR FIGURE 11 - DUAL TRACKING SUPPLY 1.25V to 20V 2/92 Rev 1.1 2/94 Copyright (c) 1994 5 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570 LINFINITY Microelectronics Inc. SG137A/SG137 SERIES CONNECTION DIAGRAMS & ORDERING INFORMATION Package 3-TERMINAL TO-3 METAL CAN K-PACKAGE (See Notes Below) Part No. SG137AK/883B SG137AK/DESC SG137AK SG237AK SG337AK SG137K/883B JAN137K SG137K/DESC SG137K SG237K SG337K SG137AR/883B SG137AR/DESC SG137AR SG237AR SG337AR SG137R/883B SG137R/DESC SG137R SG237R SG337R SG137AT/883B SG137AT/DESC SG137AT SG237AT SG337AT SG137T/883B SG137T/DESC SG137T SG237T SG337T Ambient Temperature Range -55C to 125C -55C to 125C -55C to 125C -25C to 85C 0C to 70C -55C to 125C -55C to 125C -55C to 125C -55C to 125C -25C to 85C 0C to 70C -55C to 125C -55C to 125C -55C to 125C -25C to 85C 0C to 70C -55C to 125C -55C to 125C -55C to 125C -25C to 85C 0C to 70C -55C to 125C -55C to 125C -55C to 125C -25C to 85C 0C to 70C -55C to 125C -55C to 125C -55C to 125C -25C to 85C 0C to 70C -55C to 125C -55C to 125C -55C to 125C -55C to 125C -55C to 125C -55C to 125C -55C -55C -55C -55C -55C -55C to to to to to to 125C 125C 125C 125C 125C 125C Connection Diagram ADJUSTMENT 1 2 CASE IS VIN VOUT 3-TERMINAL TO-66 METAL CAN R-PACKAGE ADJUSTMENT 1 2 CASE IS VIN V OUT 3-PIN TO-39 METAL CAN T-PACKAGE ADJUSTMENT VOUT 1 2 3 VIN 3-PIN HERMETIC TO-257 IG-PACKAGE (Isolated) SG137AIG/883B SG137AIG/DESC SG137AIG SG137IG/883B SG137IGDESC SG137IG SG137AL/883B SG137AL/DESC SG137AL SG137L/883B SG137L/DESC SG137L VOUT VIN ADJUST 20-PIN CERAMIC (LCC) LEADLESS CHIP CARRIER L- PACKAGE (Note 4) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. V OUT V OUT N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 3 2 1 20 19 4 5 6 7 8 18 17 16 15 14 9 10 11 12 13 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. VIN N.C. N.C. N.C. N.C. ADJUST N.C. N.C. N.C. N.C. Note 1. Contact factory for JAN and DESC product availability. 2. All parts are viewed from the top. 3. Product is also available in flatpack. Consult factory for price and delivery. 4. Both outputs must be externally connected together at the device terminals. 2/92 Rev 1.1 2/94 Copyright (c) 1994 6 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570 LINFINITY Microelectronics Inc. |
Price & Availability of SG237AK
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |