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SG117A/SG217A/SG317A SG117/SG217/SG317 1.5 AMP THREE TERMINAL ADJUSTABLE VOLTAGE REGULATOR
DESCRIPTION
The SG117A Series are 3-terminal positive adjustable voltage regulators which offer improved performance over the original 117 design. A major feature of the SG117A is reference voltage tolerance guaranteed within 1%, allowing an overall power supply tolerance to be better than 3% using inexpensive 1% resistors. Line and load regulation performance has been improved as well. Additionally, the SG117A reference voltage is guaranteed not to exceed 2% when operating over the full load, line and power dissipation conditions. The SG117A adjustable regulators offer an improved solution for all positive voltage regulator requirements with load currents up to 1.5A.
FEATURES
* * * * * 1% output voltage tolerance 0.01%/V line regulation 0.3% load regulation Min. 1.5A output current Available in hermetic TO-220
HIGH RELIABILITY FEATURES-SG117A/SG117
Available to MIL-STD-883 and DESC SMD MIL-M38510/11704BYA - JAN117K MIL-M38510/11703BXA - JAN117T LMI level "S" processing available
SCHEMATIC DIAGRAM
2/93 Rev 1.2 10/02
Copyright 1994
1
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG117A/SG117 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 Case, JC ................. 3.0C/W Thermal Resistance-Junction to Ambient, JA .............. 35C/W R Package: Thermal Resistance-Junction to Case, JC ................. 5.0C/W Thermal Resistance-Junction to Ambient, JA ............. 40C/W T Package: Thermal Resistance-Junction to Case, JC .................. 15C/W Thermal Resistance-Junction to Ambient, JA ........... 120C/W IG Package: Thermal Resistance-Junction to Case, JC ................. 3.5C/W Thermal Resistance-Junction to Ambient, JA ............. 42C/W L Package: Thermal Resistance-Junction to Case, 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 37V Operating Junction Temperature Range SG117A/SG117 ......................................... -55C to 150C SG217A/SG217 ......................................... -25C to 150C SG317A/SG317 ............................................ 0C to 125C
Note 2. Range over which the device is functional. Note 3. These ratings are applicable for junction temperatures of less than 150C.
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over full operating ambient temperatures for SG117A/SG117 with -55C TA 125C, SG217A/ SG217 with -25C TA 150C, SG 317A/SG317 with 0C TA 125C, VIN - VOUT = 5.0V , and for IOUT = 500mA (K, R, and IG), and IOUT = 100mA (T and L packages). Although power dissipation is internally limited, these specifications are applicable for power dissipations of 2W for the T and L packages, and 20W for the K, R, and IG packages. IMAX is 1.5A for the K, R, and IG packages and 500mA 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
Test Conditions IOUT = 10mA TA = 25C 3V (VIN - VOUT) 40V, P PMAX, 10mA IOUT IMAX 3V (VIN - VOUT) 40V, IL = 10mA TA = 25C TA = TMIN to T MAX 10mA IOUT IMAX VOUT 5V, TA = 25C VOUT 5V, TA = 25C VOUT 5V VOUT 5V TA = 25C, 20ms pulse VOUT = 10V, f =120Hz CADJ = 1F, TA = 25C CADJ = 10F 10mA IOUT IMAX , 2.5V (VIN - VOUT) 40V
SG117A/SG217A SG117/SG217 Min. Typ. Max. Min. Typ. Max. 1.238 1.250 1.262 1.225 1.250 1.270 1.20 0.005 0.01 0.01 0.02 5 15 0.1 0.3 20 50 0.3 1 0.002 0.02 65 80 50 0.2 1.25 0.01 0.02 5 0.1 20 0.3 0.03 65 80 50 0.2 1.30 0.02 0.05 15 0.3 50 1 0.07
Units V V %/V %/V mV % mV % %/W dB dB A A
Line Regulation (Note 4)
Load Regulation (Note 4)
Thermal Regulation (Note 5) Ripple Rejection
66
66 100 5
Adjust Pin Current Adjust Pin Current Change
100 5
2/93 Rev 1.2 10/02
Copyright 1994
2
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG117A/SG117 SERIES
ELECTRICAL CHARACTERISTICS (continued)
Parameter Minimum Load Current Current Limit Test Conditions (VIN - VOUT) = 40V (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) SG117/SG217 SG117A/SG217A Min. Typ. Max. Min. Typ. Max. 5 3.5 3.5 5 1.5 0.5 0.3 0.15 2.2 0.8 0.4 0.2 1 0.3 0.001 1.5 0.5 0.3 0.15 2 1 2.2 0.8 0.4 0.2 1 0.3 0.001 Units mA A A A A % % %
Temperature Stability (Note 5) Long Term Stability (Note 5) RMS Output Noise (% of VOUT)
1
Parameter Reference Voltage
Test Conditions IOUT = 10mA TA = 25C 3V (VIN - VOUT) 40V, P PMAX, 10mA IOUT IMAX 3V (VIN - VOUT) 40V, IL = 10mA TA = 25C TA = TMIN to T MAX 10mA IOUT IMAX VOUT 5V, TA = 25C VOUT 5V, TA = 25C VOUT 5V VOUT 5V TA = 25C, 20ms pulse VOUT = 10V, f =120Hz CADJ = 1F, TA = 25C CADJ = 10F TA = 25C 10mA IOUT IMAX , 2.5V (VIN - VOUT) 40V (VIN - VOUT) = 40V (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 TA = 25C, 10Hz f 10KHz (Note 5)
SG317A SG317 Min. Typ. Max. Min. Typ. Max. 1.238 1.250 1.262 1.225 1.250 1.270 1.20 0.005 0.01 0.01 0.02 25 5 0.1 0.5 50 20 0.3 1 0.002 0.02 65 80 50 0.2 3.5 2.2 0.8 0.4 0.2 1 0.3 0.001 1.25 0.01 0.02 5 0.1 20 0.3 0.03 65 80 50 0.2 3.5 2.2 0.8 0.4 0.2 1 0.3 0.001 1.30 0.04 0.07 25 0.5 70 1.5 0.07
Units V V %/V %/V mV % mV % %/W dB dB A A mA A A A A % % %
Line Regulation (Note 4)
Load Regulation (Note 4)
Thermal Regulation (Note 5) Ripple Rejection
66
66 100 5 10 1.5 0.5 0.15 .075 2 1
Adjust Pin Current Adjust Pin Current Change Minimum Load Current Current Limit
100 5 10
1.5 0.5 0.15 .075
Temperature Stability (Note 5) Long Term Stability (Note 5) RMS Output Noise (% of VOUT)
1
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.
2/93 Rev 1.2 10/02
Copyright 1994
3
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG117A/SG117 SERIES
CHARACTERISTIC CURVES
FIGURE 1. OUTPUT VOLTAGE DEVIATION VS. TEMPERATURE
FIGURE 2. OUTPUT CURRENT VS. INPUT/OUTPUT DIFFERENTIAL
FIGURE 3. ADJUSTMENT CURRENT VS. TEMPERATURE
FIGURE 4. INPUT/OUTPUT DIFFERENTIAL VS. TEMPERATURE
FIGURE 5. REFERENCE VOLTAGE VS. TEMPERATURE
FIGURE 6. QUISCENT CURRENT VS. INPUT/OUTPUT DIFFERENTIAL
FIGURE 7. RIPPLE REJECTION VS. OUTPUT VOLTAGE
FIGURE 8. RIPPLE REJECTION VS. FREQUENCY
FIGURE 9. RIPPLE REJECTION VS. OUTPUT CURRENT
2/93 Rev 1.2 10/02
Copyright 1994
4
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG117A/SG117 SERIES
CHARACTERISTIC CURVES
(continued)
FIGURE 10. OUTPUT IMPEDANCE VS. FEQUENCY
FIGURE 11. LINE TRANSIENT RESPONSE
FIGURE 12. LOAD TRANSIENT RESPONSE
FIGURE 13. OUTPUT IMPEDANCE VS. FREQUENCY
FIGURE 14. LINE TRANSIENT RESPONSE
FIGURE 15. LOAD TRANSIENT RESPONSE
FIGURE 16. OUTPUT VOLTAGE ERROR
2/93 Rev 1.2 10/02
Copyright 1994
5
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG117A/SG117 SERIES
APPLICATION INFORMATION
GENERAL The SG117A develops a 1.25V reference voltage between the output and the adjustable terminal (see Figure 1). By placing a resistor, R1 between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage, Normally this current is the specified minimum load current of 5mA or 10mA. For convenience, a table of standard 1% resistor values is shown below.
Table of 1/2% and 1% Standard Resistance Values
FIGURE 17 - BASIC REGULATOR CIRCUIT
1.00 1.02 1.05 1.07 1.10 1.13 1.15 1.18 1.21 1.24 1.27 1.30 1.33 1.37 1.40 1.43
1.47 1.50 1.54 1.58 1.62 1.65 1.69 1.74 1.78 1.82 1.87 1.91 1.96 2.00 2.05 2.10
2.15 2.21 2.26 2.32 2.37 2.43 2.49 2.55 2.61 2.67 2.74 2.80 2.87 2.94 3.01 3.09
3.16 3.24 3.32 3.40 3.48 3.57 3.65 3.74 3.83 3.92 4.02 4.12 4.22 4.32 4.42 4.53
4.64 4.75 4.87 4.99 5.11 5.23 5.36 5.49 5.62 5.76 5.90 6.04 6.19 6.34 6.49 6.65
6.81 6.98 7.15 7.32 7.50 7.68 7.87 8.06 8.25 8.45 8.66 8.87 9.09 9.31 9.53 9.76
Because IADJ is very small and constant when compared with the current through R1, it represents a small error and can usually be ignored. It is easily seen from the above equation, that even if the resistors were of exact value, the accuracy of the output is limited by the accuracy of VREF. Earlier adjustable regulators had a reference tolerance of 4%. This tolerance is dangerously close to the 5% supply tolerance required in many logic and analog systems. Further, many 1% resistors can drift 0.01%C adding another 1% to the output voltage tolerance. For example, using 2% resistors and 4% tolerance for VREF, calculations will show that the expected range of a 5V regulator design would be 4.66V VOUT 5.36V or approximately 7%. If the same example were used for a 15V regulator, the expected tolerance would be 8%. With these results most applications require some method of trimming, usually a trim pot. This solution is expensive and not conducive to volume production. One of the enhancements of Silicon General's adjustable regulators over existing devices is tightened initial tolerance. This allows relatively inexpensive 1% or 2% film resistors to be used for R1 and R2 while setting output voltage within an acceptable tolerance range. With a guaranteed 1% reference, a 5V power supply design, using 2% resistors, would have a worse case manufacturing tolerance of 4%. If 1% resistors were used, the tolerance would drop to 2.5%. A plot of the worst case output voltage tolerance as a function of resistor tolerance is shown on the front page.
Standard Resistance Values are obtained from the Decade Table by multiplying by multiples of 10. As an example:1.21 can represent 1.21, 12.1, 121, 1.21K etc.
FIGURE 18 - CONNECTIONS FOR BEST LOAD REGULATION
FIGURE 19 - 1.2V-25V ADJUSTABLE REGULATOR
2/93 Rev 1.2 10/02
Copyright 1994
6
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG117A/SG117 SERIES
APPLICATION INFORMATION
BYPASS CAPACITORS Input bypassing using a 1F tantalum or 25F electrolytic is recommended when the input filter capacitors are more than 5 inches from the device. A 0.1F bypass capacitor on the ADJUST pin is required if the load current varies by more than 1A/ sec. Improved ripple rejection (80dB) can be accomplished by adding a 10F capacitor from the adjust pin to ground. For improved AC transient response and to prevent the possibility of oscillation due to unknown reactive load, a 1F capacitor is also recommended at the output. Because of their low impedance at high frequencies, the best type of capacitor to use is solid tantalum.
FIGURE 22 - 5V REGULATOR WITH SHUT DOWN
(continued)
FIGURE 20 - REMOTE SENSING FIGURE 23 - 21V PROGRAMMING SUPPLY FOR UV PROM/EEPROM
FIGURE 21 - IMPROVING RIPPLE REJECTION
LOAD REGULATION Because the SG117A is a three-terminal device, it is not possible to provide true remote load sensing. Load regulation will be limited by the resistance of the wire connecting the regulator to the load. For the data sheet specification, regulation is measured at the bottom of the package. Negative side sensing is a true Kelvin connection, with the bottom of the output divider returned to the negative side of the load. Although it may not be immediately obvious, best load regulation is obtained when the top of the divider is connected directly to the case, not to the load. This is illustrated in Figure 18. If R1 were connected to the load, the effective resistance between the regulator and the load would be RP X
FIGURE 24 - 2816 EEPROM SUPPLY PROGRAMMER FOR READ/WRITE CONTROL
(
R2 + R1 R1
)R
P
= Parasitic Line Resistance. ,
Connected as shown, RP is not multiplied by the divider ratio. RP is about 0.004 per foot using 16 gauge wire. This translates to 4mV/ft. at 1A load current, so it is important to keep the positive lead between regulator and load as short as possible.
FIGURE 25 - TEMPERATURE COMPENSATED LEAD ACID BATTERY CHARGER
2/93 Rev 1.2 10/02
Copyright 1994
7
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.
SG117A/SG117 SERIES
CONNECTION DIAGRAMS & ORDERING INFORMATION
Package
3-TERMINAL TO-3 METAL CAN K-PACKAGE (See Notes Below)
Part No. SG117AK/883B SG117AK/DESC SG117AK SG217AK SG317AK SG117K/883B JAN117K SG117K/DESC SG117K SG217K SG317K SG117AR/883B SG117AR/DESC SG117AR SG217AR SG317AR SG117R/883B SG117AR/DESC SG117R SG217R SG317R SG117AT/883B SG117AT/DESC SG117AT SG217AT SG317AT SG117T/883B JAN117T SG117T/DESC SG117T SG217T SG317T
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 -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 to 125C -55C to 125C -55C to 125C -55C to 125C -55C to 125C -55C to 125C
Connection Diagram
ADJUSTMENT
1 2 CASE IS V OUT VIN
3-TERMINAL TO-66 METAL CAN R-PACKAGE
ADJUSTMENT
1 2 CASE IS VOUT VIN
3-PIN TO-39 METAL CAN T-PACKAGE
VIN ADJUST
1 2 3 VOUT
CASE IS VOUT
3-PIN HERMETIC TO-257 IG-PACKAGE (Isolated)
SG117AIG/883B SG117AIG/DESC SG117AIG SG117IG/883B SG117IG/DESC SG117IG SG117AL/883B SG117AL/DESC SG117AL SG117L/883B SG117L/DESC SG117L
VIN VOUT ADJUST
20-PIN CERAMIC (LCC) LEADLESS CHIP CARRIER L- PACKAGE
(Note 4)
1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
VOUT SENSE N.C. N.C. 4 N.C. 5 VIN 6 N.C. 7 N.C. 8 N.C. N.C. ADJUST
3
2
1
20 19 18 17 16 15 14
9
10 11 12 13
11. 12. 13. 14. 15. 16. 17. 18. 19. 20.
N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. VOUT
Note 1. Contact factory for JAN and DESC product availability. 3. Both inputs and outputs must be externally connected together at the device 2. All parts are viewed from the top. terminals. 4. For normal operation the SENSE pin must be externally connected to the load.
2/93 Rev 1.2 10/02
Copyright 1994
8
11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570
LINFINITY
Microelectronics Inc.

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