SG137AT-883B

SG137A/SG137 500mA Negative Adjustable Regulator Features Description The SG137A family of negative adjustable regulators deliver up to 500mA output current over an output voltage range of -1.2 V to -37 V. The device includes significant improvements, 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 is 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 voltage regulators.     1% Output Voltage Tolerance 0.01%/V Line Regulation 0.5% Load Regulation 0.02%/W Thermal Regulation High Reliability Features SG137A/SG137  Available to MIL-STD-883  MSC-AMS Level "S" Processing Available  Available to DSCC – Standard Microcircuit Drawing (SMD)  SGR137A/SGR137 Rad-Tolerant Version Available Typical Application R2* + C2 5 µF SOLID TANTALUM R1 121W + C3 1 µF SOLID TANTALUM ADJ -VIN VIN SG137A VOUT -VOUT = 1.25 V (1+R2/R1) *R2 = R1(│VOUT│/1.25V-1) Figure 1 · Typical Application December 2014 Rev. 1.2 www.microsemi.com © 2014 Microsemi Corporation- Analog Mixed Signal 1 500mA Negative Adjustable Regulator 12 11 10 OUTPUT VOLTAGE ERROR (%) 9 8 2% RESISTORS 7 SG137 6 1% RESISTORS 5 2% RESISTORS SG137A 4 1% RESISTORS 3 2 1 2 4 6 10 20 40 100 OUTPUT VOLTAGE Figure 2 · Resistor Precision vs. Output Voltage Error Connection Diagrams and Ordering Information Ambient Temperature Type Package Part Number Packaging Type Connection Diagram SG137AT-883B SG137AT-DESC -55°C to 125°C T 3-Terminal Metal Can ADJ 1 SG137AT TO-39 3 2 SG137T-883B VOUT SG137T-DESC VIN CASE IS VIN SG137T 3 2 1 20 19 SG137AL-883B SG137AL-DESC -55°C to 125°C L 20-Pin CERAMIC Leadless Chip Carrier SG137AL 5 17 6 16 7 15 8 14 CLCC SG137L-883B SG137L-DESC SG137L 2 4 18 1. VOUT* 2. VOUT* 3. N.C. 4. N.C. 5. N.C. 6. N.C. 7. N.C. 8. N.C. 9. N.C. 10. N.C. 9 10 11 12 13 L PACKAGE (Top View) PbSn Lead Finish * Both VOUT pins must be externally connected together at the device terminals. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. VIN N.C. N.C. N.C. N.C ADJ N.C N.C N.C N.C Absolute Maximum Ratings1 Absolute Maximum Ratings1 Value Units Internally Limited - 40 V -65 to 150 °C Parameter Power Dissipation Input to Output Voltage Differential Storage Temperature Range Operating Junction Temperature 150 °C Lead Temperature (Soldering, 10 Seconds) 300 °C kV ESD Rating (Human Body Model) 2 Notes: 1. Stresses above those listed in "ABSOLUTE MAXIMUM RATINGS", may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. Thermal Data Value Units Thermal Resistance-Junction to Leads, θJC 15 °C/W Thermal Resistance-Junction to Ambient, θJA 120 °C/W 35 °C/W Parameter T Package: L Package: Thermal Resistance-Junction to Leads, θJC °C/W Thermal Resistance-Junction to Ambient, θJA 120 Notes:  Junction Temperature Calculation: TJ = TA + (PD x θJA).  The above numbers for θJC are maximums for limiting the thermal resistance of the package in a standard mounting configuration. The θJA numbers are the guidelines for the thermal performance of the device/pcboard system. All of the above assume no ambient airflow. Recommended Operating Conditions2,3 Symbol Parameter Recommended Operating Conditions Min VOUT Input Voltage Range Operating Junction Temperature Range -(│VOUT│+3.5V) SG137A/137 -55 Note: 2. Range over which the device is functional. 3. These ratings are applicable for junction temperatures of less than 135°C. Typ Units Max -36 V 150 °C 3 500mA Negative Adjustable Regulator Electrical Characteristics Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG137A/SG137 with -55°C ≤ TJ ≤ 150°C, |VIN - VOUT| = 5.0V, and for IOUT = 100mA. Although power dissipation is internally limited, these specifications are applicable for power dissipations of 2W, and IMAX = 0.5A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. Symbol SG137A Test Conditions Min. Reference Voltage Typ. SG137 Max Min. Typ. Units Max IOUT = 10mA, TJ = 25°C -1.238 -1.250 -1.262 -1.225 -1.250 -1.275 V 3V ≤ |VIN - VOUT| ≤ 40V, 10mA ≤ IOUT ≤ IMAX -1.220 -1.250 -1.280 -1.200 -1.250 -1.300 V 6 3V ≤ |VIN - VOUT| ≤ 40V, IOUT ≤ IMAX Line Regulation 4,6 TJ = 25°C 0.005 0.01 0.01 0.02 %/V |VOUT| ≤ 5V, TJ= 25°C 5 25 15 25 mV |VOUT| ≥ 5V, TJ = 25°C 0.1 0.5 0.3 0.5 % |VOUT| ≤ 5V 10 50 20 50 mV |VOUT| ≥ 5V 0.2 1 0.3 1 % 0.002 0.02 0.002 0.02 %/W 10mA ≤ IOUT ≤ IMAX Load Regulation 4 5 Thermal Regulation TJ= 25°C, 10ms pulse VOUT = -10V, f =120Hz Ripple Rejection Adjust Pin Current Adjust Pin Current 6 Change Minimum Load Current Current Limit 4 CADJ = 0, TJ = 25°C 60 66 CADJ = 10µF 70 80 66 60 dB 77 dB TA = 25°C 65 100 65 100 µA 3V ≤ |VIN - VOUT| ≤ 40V 1.0 5 2 5 µA 10mA ≤ IOUT ≤ IMAX 0.2 2 0.5 5 µA |VIN - VOUT| ≤ 40V 2.5 5.0 2.5 5.0 mA |VIN - VOUT| ≤ 10V 1.2 3 1.2 3.0 mA |VIN - VOUT| ≤ 15V 0.5 0.8 1.5 0.5 0.8 A |VIN - VOUT| ≤ 40V, TJ = 25°C 0.15 0.25 0.5 0.15 0.25 A Electrical Characteristics Electrical Characteristics Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG137A/SG137 with -55°C ≤ TJ ≤ 150°C, |VIN - VOUT| = 5.0V, and for IOUT = 100mA. Although power dissipation is internally limited, these specifications are applicable for power dissipations of 2W, and IMAX = 0.5A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature. SG137A Symbol Units Min. Temperature Stability Long Term Stability SG137 Test Conditions 5 5 RMS Output Noise (% of VOUT) TJ = 125°C, 1000 Hours 5 TJ = 25°C, 10Hz ≤ f ≤ 10kHz Typ. Max 0.6 1.5 0.6 0.3 1 0.3 0.003 Min. Typ. 0.003 Max % 1 % % Notes: 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. 5. These parameters, although guaranteed, are not tested in production 6. IMAX is VIN - VOUT = 3V / 500mA and VIN - VOUT = 40V / 150mA. 5 500mA Negative Adjustable Regulator Characteristic Curves 3.0 1.27 INPUT/OUTPUT DIFFERENTIAL (V) 2.6 REFERENCE VOLTAGE (V) 1.26 2.2 o 1.8 Tj 55 =- 1.4 C o Tj= + Tj= 25 15 C o 0C 0.4 0.8 1.6 1.2 1.24 1.23 -75 1.0 0 1.25 2.0 -50 -25 0 25 75 100 125 150 50 o TEMPERATURE ( C) OUTPUT CURRENT (A) Figure 3 · Input/Output Differential vs. Output Current Figure 4 · Reference Voltage Vs. Temperature 1.8 0.4 1.6 TJ = -55oC OUTPUT VOLTAGE DEVIATION (%) 1.4 CURRENT (mA) 1.2 1.0 TJ = 25oC 0.8 0.6 TJ = 150oC 0.4 0.2 0 -0.2 -0.4 0.2 0 0 10 20 30 0 40 0.4 INPUT-OUTPUT DIFFERENTIAL (V) Figure 5 · Current Vs. Input/Output Differential 3 0.8 1.2 1.6 2.0 OUTPUT CURRENT (A) Figure 6 · Output Voltage Deviation Vs. Output Current* TJ = 25oC TJ = -55oC 80 TJ = 155oC ADJUSTMENT CURRENT (µA) OUTPUT CURRENT (A) 75 2 1 T PACKAGED DEVICE 70 65 60 55 50 -75 0 0 10 20 30 40 INPUT-OUTPUT DIFFERENTIAL (V) Figure 7 · Input/Output Differential Vs. Output Current -50 -25 0 25 50 75 100 125 150 TEMPERATURE (oC) Figure 8 · Adjustment Current Vs. Temperature Notes: *The SG137A has load regulation compensation which makes the typical unit read close to zero. This band represents the typical production spread. 6 Application Information Application Information Output Voltage The output voltage is determined by two external resistors, R1 and R2 + C1 R2 10 µF IADJ + C2 5 µF + VREF R1 C3 1 µF ADJ VIN -VIN SG137A -VOUT VOUT Figure 9 · Output Voltage The exact formula for the output voltage is: ( ) Where: VREF = Reference Voltage and IADJ = Adjustment Pin Current. In most applications, the second term is small enough to be ignored, typically about 0.5% of V OUT. In more critical applications, the exact formula should be used, with IADJ equal to 65 µA. Solving for R2 yields: Smaller values of R1 and R2 reduce the influence of IADJ on the output voltage, but the no-load current drain on the regulator is increased. Typical values for R1 are between 100 Ω and 300 Ω, giving 12.5mA and 4.2mA no-load current. There is an additional consideration in selecting R1 the minimum load current specification of the regulator. The operating current of the SG137A flows from input to output. If this current is not absorbed by the load, the output of the regulator rises 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 and output voltage differential is less than 10V, the operating current that must be absorbed drops to 3mA. Examples: 1. A precision 10V regulator to supply up to 1 Amp load current. a. Select R1 = 100Ω to minimize effect of IADJ b. Calculate ⁄ ⁄ A 15 V regulator to run off batteries and supply 50mA. VIN MAX = 25V c. To minimize battery drain, select R1 as high as possible Use 404Ω, 1% 7 500mA Negative Adjustable Regulator Typical Application Circuits 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 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 as shown figure 11, regulators #2 to #N tracks regulator #1 to within ±24 mV initially, and to ±60 mV over all load, line, and temperature conditions. If any regulator output is shorted to ground, all other outputs drop to -2V. Load regulation of regulators #2 to #N are improved by VOUT/1.25 V compared to a standard regulator, so regulator #1 should be the one which has the lowest load current. 7V R2* LM129A + C1 1 µF SOLID TANTALUM R1 1k 1% R3 1.5k 1% ADJ VIN -VIN SG137A VOUT -VOUT -3 *R2 = (VOUT / 9.08 x 10 ) – 908W Figure 10 · High Stability Regulator C3 10 µF R2 + C1 + 1µF SOLID TANTALUM 2 µF IN4002 ADJ R1 120W Reg # 1 VIN -VIN SG137A VOUT IN4002 + -VOUT + 1 µF SOLID TANTALUM ADJ 2 µF Reg # 2 VIN SG137A VOUT IN4002 + Reg # N VIN SG137A + 1 µF SOLID TANTALUM ADJ 2 µF -VOUT2 VOUT Figure 11 · Multiple Tracking Regulators 8 -VOUT#N Typical Application Circuits C1 + 1 µF SOLID TANTALUM ADJ VIN (-) SG137A VOUT (+) I I = 65 µA + 1.25 V/Rs (0.8W < Rs < 250W) Figure 12 · Current Regulator +VIN VIN SG137A +VOUT VOUT ADJ R1** 100W 1% R2 5k 1% 10 µF + 2.2* µF D1 IN4002 2.2* µF D2 IN4002 R3 5k R4 5k 1% 10 µF R5** 100W 1% + ADJ -VIN VIN SG137A -VOUT VOUT * Solid Tantalum ** R1 or R5 may be trimmed slightly to improve tracking Figure 13 · Dual Tracking Supply ±1.25 V To ±20 V 9 500mA Negative Adjustable Regulator Package Outline Dimensions Controlling dimensions are in inches, metric equivalents are shown for general information. Dim D D1 Q A D D1 A b F e k k1 L α e1 b1 Q L1 e F b L1 e1 L α k k1 b1 MILLIMETERS MIN MAX 8.89 9.40 8.13 8.51 4.19 4.70 0.41 0.48 1.02 5.08 BSC 0.71 0.86 0.74 1.14 12.70 14.48 45° TYP 2.54 TYP 0.41 0.53 90° TYP 1.27 INCHES MIN MAX 0.350 0.370 0.320 0.335 0.165 0.185 0.016 0.019 0.040 0.200 BSC 0.028 0.034 0.029 0.045 0.500 0.570 45° TYP 0.100 TYP 0.016 0.021 90° TYP 0.50 MILLIMETERS MIN MAX 8.64 9.14 8.128 1.270 BSC 0.635 TYP 1.02 1.52 1.626 2.286 1.016 TYP 1.372 1.68 1.168 1.91 2.41 0.203R INCHES MIN MAX 0.340 0.360 0.320 0.050 BSC 0.025 TYP 0.040 0.060 0.064 0.090 0.040 TYP 0.054 0.066 0.046 0.075 0.95 0.008R Figure 14 · T 3-Pin Metal Can TO-39 Package Dimensions E3 D Dim D/E E3 e B1 L A h A1 A2 L2 B3 E A A1 L2 L 8 3 Note: 1 1. 13 All exposed metalized area shall be gold plated 60 micro-inch minimum thickness over nickel plated unless otherwise specified in purchase order. h A2 18 B1 e B3 Figure 15 · L 20-Pin Ceramic Leadless Chip Carrier (LCC) Package Dimensions 10 Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for communications, defense & security, aerospace and industrial markets. Products include high-performance and radiation-hardened analog mixed-signal integrated circuits, FPGAs, SoCs and ASICs; power management products; timing and synchronization devices and precise time solutions, setting the world’s standard for time; voice processing devices; RF solutions; discrete components; security technologies and scalable anti-tamper products; Power-over-Ethernet ICs and midspans; as well as custom design capabilities and services. Microsemi is headquartered in Aliso Viejo, Calif., and has approximately 3,400 employees globally. Learn more at www.microsemi.com. Microsemi Corporate Headquarters One Enterprise, Aliso Viejo, CA 92656 USA Within the USA: +1 (800) 713-4113 Outside the USA: +1 (949) 380-6100 Sales: +1 (949) 380-6136 Fax: +1 (949) 215-4996 E-mail: sales.support@microsemi.com © 2014 Microsemi Corporation. All rights reserved. Microsemi and the Microsemi logo are trademarks of Microsemi Corporation. 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