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 sg117a/sg217a/sg317a sg117/sg217/sg317 1.5 amp three terminal adjust able voltage regulator schematic diagram 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 1 (714) 898-8121 fax: (714) 893-2570
sg117a/sg117 series 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 2 (714) 898-8121 fax: (714) 893-2570 electrical characteristics (unless otherwise specified, these specifications apply over full operating ambient temperatures for sg117a/sg117 with -55c t a 125c, sg217a/ sg217 with -25c t a 150c, sg 317a/sg317 with 0c t a 125c, v in - v out = 5.0v , and for i out = 500ma (k, r, and ig), and i out = 100ma (t and l packages). although power dissipation is internally limited, these specifications are applicable for power dissipatio ns of 2w for the t and l packages, and 20w for the k, r, and ig packages. i max 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.) power dissipation ........................................ input to output voltage differential ................................. storage temperature range .......................... absolute maximum ratings (note 1) internally limited 40v -65 c to 150 c operating junction temperature hermetic (k, r, t, l, ig-packages) ............................ lead temperature (soldering, 10 seconds) .............. 150 c 300 c note 1. exceeding these ratings could cause damage to the device. input voltage range .............................. (v out + 3.5v) to 37v operating junction temperature range sg117a/sg117 ......................................... sg217a/sg217 ......................................... sg317a/sg317 ............................................ -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 150c. recommended operating conditions (note 2 & 3) units sg117/sg217 min. typ. max. min. typ. max. sg117a/sg217a parameter test conditions i out = 10ma t a = 25c 3v (v in - v out ) 40v, p p max , 10ma i out i max 3v (v in - v out ) 40v, i l = 10ma t a = 25c t a = t min to t max 10ma i out i max v out 5v, t a = 25c v out 5v, t a = 25c v out 5v v out 5v t a = 25c, 20ms pulse v out = 10v, f =120hz c adj = 1 f, t a = 25c c adj = 10 f 10ma i out i max , 2.5v (v in - v out ) 40v 1.238 1.225 66 1.250 1.250 0.005 0.01 5 0.1 20 0.3 0.002 65 80 50 0.2 1.262 1.270 0.01 0.02 15 0.3 50 1 0.02 100 5 1.20 66 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 0.07 100 5 v v %/v %/v mv % mv % %/w db db a a 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 thermal data note a. junction temperature calculation: t j = t a + (p d x ja ). note b. the above numbers for jc are maximums for the limiting thermal resistance of the package in a standard mount- ing configuration. the ja numbers are meant to be guidelines for the thermal performance of the device/pc- board system. all of the above assume no ambient airflow. reference voltage line regulation (note 4) load regulation (note 4) thermal regulation (note 5) ripple rejection adjust pin current adjust pin current change
sg117a/sg117 series 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 3 (714) 898-8121 fax: (714) 893-2570 units min. typ. max. min. typ. max. 1.262 1.270 0.01 0.02 25 0.5 50 1 0.02 100 5 10 2 1 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 0.07 100 5 10 1 test conditions parameter reference voltage line regulation (note 4) load regulation (note 4) thermal regulation (note 5) ripple rejection adjust pin current adjust pin current change minimum load current current limit temperature stability (note 5) long term stability (note 5) rms output noise (% of v out ) electrical characteristics (continued) test conditions parameter units sg117/sg217 min. typ. max. min. typ. max. sg117a/sg217a (v in - v out ) = 40v (v in - v out ) 15v k, p, r, ig packages t, l packages (v in - v out ) = 40v, t j = 25c k, p, r, ig packages t, l packages t a = 125c, 1000 hours t a = 25c, 10hz f 10 khz (note 5) 1.5 0.5 0.3 0.15 5 2 1 3.5 2.2 0.8 0.4 0.2 1 0.3 0.001 1.5 0.5 0.3 0.15 3.5 2.2 0.8 0.4 0.2 1 0.3 0.001 5 1 ma a a a a % % % sg317a sg317 i out = 10ma t a = 25c 3v (v in - v out ) 40v, p p max , 10ma i out i max 3v (v in - v out ) 40v, i l = 10ma t a = 25c t a = t min to t max 10ma i out i max v out 5v, t a = 25c v out 5v, t a = 25c v out 5v v out 5v t a = 25c, 20ms pulse v out = 10v, f =120hz c adj = 1 f, t a = 25c c adj = 10 f t a = 25c 10ma i out i max , 2.5v (v in - v out ) 40v (v in - v out ) = 40v (v in - v out ) 15v k, p, r, ig packages t, l packages (v in - v out ) = 40v, t j = 25c k, p, r, ig packages t, l packages t a = 125c t a = 25c, 10hz f 10khz (note 5) 1.238 1.225 66 1.5 0.5 0.15 .075 1.250 1.250 0.005 0.01 5 0.1 20 0.3 0.002 65 80 50 0.2 3.5 2.2 0.8 0.4 0.2 1 0.3 0.001 1.20 66 1.5 0.5 0.15 .075 v v %/v %/v mv % mv % %/w db db a a ma a a a a % % % note 4. regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. changes in output vo ltage due to heating effects are covered under the specification for thermal regulation. note 5. these parameters, although guaranteed, are not tested in production. minimum load current current limit temperature stability (note 5) long term stability (note 5) rms output noise (% of v out )
sg117a/sg117 series 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 4 (714) 898-8121 fax: (714) 893-2570 figure 6. quiscent current vs. input/output differential figure 5. reference voltage vs. temperature figure 3. adjustment current vs. temperature figure 2. output current vs. input/output differential figure 1. output voltage deviation vs. temperature figure 4. input/output differential vs. temperature figure 9. ripple rejection vs. output current figure 7. ripple rejection vs. output voltage figure 8. ripple rejection vs. frequency characteristic curves
sg117a/sg117 series 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 5 (714) 898-8121 fax: (714) 893-2570 figure 15. load transient response figure 14. line transient response figure 13. output impedance vs. frequency figure 12. load transient response figure 11. line transient response figure 10. output impedance vs. fequency characteristic curves (continued) figure 16. output voltage error
sg117a/sg117 series 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 6 (714) 898-8121 fax: (714) 893-2570 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, r 1 between these two terminals, a constant current is caused to flow through r 1 and down through r 2 to set the overall output voltage, normally this current is the specified minimum load current of 5ma or 10ma. figure 17 - basic regulator circuit because i adj is very small and constant when compared with the current through r 1 , 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 v ref . 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 v out 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 regu- lators over existing devices is tightened initial tolerance. this allows relatively inexpensive 1% or 2% film resistors to be used for r 1 and r 2 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. 1.00 1.47 2.15 3.16 4.64 6.81 1.02 1.50 2.21 3.24 4.75 6.98 1.05 1.54 2.26 3.32 4.87 7.15 1.07 1.58 2.32 3.40 4.99 7.32 1.10 1.62 2.37 3.48 5.11 7.50 1.13 1.65 2.43 3.57 5.23 7.68 1.15 1.69 2.49 3.65 5.36 7.87 1.18 1.74 2.55 3.74 5.49 8.06 1.21 1.78 2.61 3.83 5.62 8.25 1.24 1.82 2.67 3.92 5.76 8.45 1.27 1.87 2.74 4.02 5.90 8.66 1.30 1.91 2.80 4.12 6.04 8.87 1.33 1.96 2.87 4.22 6.19 9.09 1.37 2.00 2.94 4.32 6.34 9.31 1.40 2.05 3.01 4.42 6.49 9.53 1.43 2.10 3.09 4.53 6.65 9.76 table of ?% and 1% standard resistance values 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 for convenience, a table of standard 1% resistor values is shown below.
sg117a/sg117 series 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 7 (714) 898-8121 fax: (714) 893-2570 application information (continued) 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 0.1 f 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 figure 23 - 21v programming supply for uv prom/eeprom figure 24 - 2816 eeprom supply programmer for read/write control figure 25 - temperature compensated lead acid battery charger 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 immedi- ately 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 r 1 were connected to the load, the effective resistance between the regulator and the load would be connected as shown, r p is not multiplied by the divider ratio. r p 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 20 - remote sensing ( ) r p x , r p = parasitic line resistance. r 2 + r 1 r 1
sg117a/sg117 series 2/93 rev 1. 2 10/02 l in f in ity microelectronics inc. copyright ? 1994 11861 western avenue garden grove, ca 92841 8 (714) 898-8121 fax: (714) 893-2570 connection diagrams & ordering information (see notes below) ambient temperature range part no. package connection diagram 3-terminal to-3 metal can k-package sg117ak/883b -55c to 125c sg117ak/desc -55c to 125c sg117ak -55c to 125c sg217ak -25c to 85c sg317ak 0c to 70c sg117k/883b -55c to 125c jan117k -55c to 125c sg117k/desc -55c to 125c sg117k -55c to 125c sg217k -25c to 85c SG317K 0c to 70c 2 1 adjustment case is v out v in 3-terminal to-66 metal can r-package sg117ar/883b -55c to 125c sg117ar/desc -55c to 125c sg117ar -55c to 125c sg217ar -25c to 85c sg317ar 0c to 70c sg117r/883b -55c to 125c sg117ar/desc -55c to 125c sg117r -55c to 125c sg217r -25c to 85c sg317r 0c to 70c 1 2 adjustment case is v out v in 3-pin to-39 metal can t-package sg117at/883b -55c to 125c sg117at/desc -55c to 125c sg117at -55c to 125c sg217at -25c to 85c sg317at 0c to 70c sg117t/883b -55c to 125c jan117t -55c to 125c sg117t/desc -55c to 125c sg117t -55c to 125c sg217t -25c to 85c sg317t 0c to 70c v out adjust 3 2 1 v in case is v out 3-pin hermetic to-257 ig-package (isolated) sg117aig/883b -55c to 125c sg117aig/desc -55c to 125c sg117aig -55c to 125c sg117ig/883b -55c to 125c sg117ig/desc -55c to 125c sg117ig -55c to 125c v in v out adjust sg117al/883b -55 c to 125 c sg117al/desc -55c to 125c sg117al -55 c to 125 c sg117l/883b -55 c to 125 c sg117l/desc -55c to 125c sg117l -55 c to 125 c 20-pin ceramic (lcc) leadless chip carrier l- package 4 5 6 7 8 18 17 16 15 14 9 10 111213 32 12019 11. n.c. 12. n.c. 13. n.c. 14. n.c. 15. n.c. 16. n.c. 17. n.c. 18. n.c. 19. n.c. 20. v out (note 4) 1. v out sense 2. n.c. 3. n.c. 4. n.c. 5. v in 6. n.c. 7. n.c. 8. n.c. 9. n.c. 10. adjust note 1. contact factory for jan and desc product availability. 2. all parts are viewed from the top. 3. both inputs and outputs must be externally connected together at the device terminals. 4. for normal operation the sense pin must be externally connected to the load.
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