tl499a wide-range power-supply controllers slvs029f january 1984 revised may 2000 1 post office box 655303 ? dallas, texas 75265 internal series-pass and step-up switching regulator output adjustable from 2.9 v to 30 v 1-v to 10-v input for switching regulator 4.5-v to 32-v input for series regulator externally controlled switching current no external rectifier required description the tl499a is an integrated circuit designed to provide a wide range of adjustable regulated supply voltages. the regulated output voltage can be varied from 2.9 v to 30 v by adjusting two external resistors. when the tl499a is ac-coupled to line power through a step-down transformer, it operates as a series dc voltage regulator to maintain the regulated output voltage. with the addition of a battery from 1.1 v to 10 v, an inductor, a filter capacitor, and two resistors, the tl499a operates as a step-up switching regulator during an ac-line failure. the adjustable regulated output voltage makes the tl499a useful for a wide range of applications. providing backup power during an ac-line failure makes the tl499a extremely useful in microprocessor memory applications. the tl499ac is characterized for operation from 20 c to 85 c. available options t a plastic dip (p) plastic small-outline (ps) chip form (y) 20 c to 85 c tl499acp TL499ACPS tl499ay the ps package is available taped and reeled. add the suffix r to device type (e.g., TL499ACPSr). chip forms are tested at 25 c. copyright ? 2000, texas instruments incorporated production data information is current as of publication date. products conform to specifications per the terms of texas instruments standard warranty. production processing does not necessarily include testing of all parameters. please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 8 7 6 5 series in1 ref sw reg in2 sw current ctrl output gnd (pwr) sw in gnd p or ps package (top view)
tl499a wide-range power-supply controllers slvs029f january 1984 revised may 2000 2 post office box 655303 ? dallas, texas 75265 functional block diagram startup gnd ref sw reg control current sense voltage sense startup blocking diode sw in sw reg in2 series in1 output gnd (pwr) sw current ctrl 3 1 5 6 8 7 4 2 + + + +
tl499a wide-range power-supply controllers slvs029f january 1984 revised may 2000 3 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) 2 output voltage, v o (see note 1) 35 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage, series regulator, v i 1 35 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input voltage, switching regulator, v i 2 10 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . blocking-diode reverse voltage 35 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . blocking-diode forward current 1 a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . power switch current (sw in) 1 a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . package thermal impedance, q ja (see notes 2 and 3): p package 85 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . ps package 95 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg 65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 stresses beyond those listed under aabsolute maximum ratingso may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated under arecommended operating conditi onso is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. notes: 1. all voltage values are with respect to network ground terminal. 2. maximum power dissipation is a function of t j (max), q ja , and t a . the maximum allowable power dissipation at any allowable ambient temperature is p d = (t j (max) t a )/ q ja . operating at the absolute maximum t j of 150 c can affect reliability. 3. the package thermal impedance is calculated in accordance with jesd 51. recommended operating conditions min nom max unit output voltage, v o 2.9 30 v input voltage, v i 1 (series in1) 4.5 32 v input voltage, v i 2 (sw reg in2) 1.1 10 v output-to-input differential voltage, switching regulator, v o v i 2 (see note 4) 1.2 28.9 v continuous output current, i o 100 ma power switch current (at sw in) 500 ma current-limiting resistor, r cl 150 1000 w filter capacitor 100 470 m f pass capacitor 0.1 m f inductor, l (dcr 0.1 w ) 50 150 m h operating free-air temperature, t a 20 85 c note 4: when operating temperature range is t a 70 c, minimum v o v i 2 is 1.2 v. when operating temperature range is t a 85 c, minimum v o v i 2 is 1.9 v.
tl499a wide-range power-supply controllers slvs029f january 1984 revised may 2000 4 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended operating conditions (unless otherwise noted) parameter test conditions tl499ac unit parameter test conditions min typ max unit voltage deviation (see note 5) 20 30 mv/v switching regulator t a = 20 c to 70 c 1.2 dropout voltage s w itching reg u lator 1.9 v series regulator v i 1 = 15 v, i o = 50 ma 1.8 reference voltage (internal) v i 2 = 5 v, v o = 3 v, i o = 1 ma 1.2 1.26 1.32 v reference-voltage change with temperature 5 10 mv/v output regulation (of reference voltage) i o = 1 ma to 50 ma 10 30 mv/v v i 2 = 1.1 v, v o = 12 v, r cl = 150 w , t a = 25 c 10 output current switching regulator v i 2 = 1.5 v, v o = 15 v, r cl = 150 w , t a = 25 c 15 ma (see figure 1) v i 2 = 6 v, v o = 30 v, r cl = 150 w , t a = 25 c 65 ma series regulator 100 standby current switching regulator v i 2 = 3 v, v o = 9 v, t a = 25 c 15 80 m a standb y c u rrent series regulator v i 1 = 15 v, v o = 9 v, r e 2 = 4.7 k w 0.8 1.2 ma note 5: voltage deviation is the output voltage difference that occurs in a change from series regulation to switching regulatio n: voltage deviation v o series regulation v o switching regulation electrical characteristics over recommended operating conditions, t a = 25 c (unless otherwise noted) parameter test conditions tl499ay unit parameter test conditions min typ max unit voltage deviation (see note 5) 20 30 mv/v switching regulator t a = 20 c to 70 c 1.2 dropout voltage s w itching reg u lator t a = 20 c to 85 c 1.9 v series regulator v i 1 = 15 v, i o = 50 ma 1.8 reference voltage (internal) v i 2 = 5 v, v o = 3 v, i o = 1 ma 1.2 1.26 1.32 v reference-voltage change with temperature t a = 20 c to 85 c 5 10 mv/v output regulation (of reference voltage) i o = 1 ma to 50 ma 10 30 mv/v v i 2 = 1.1 v, v o = 12 v, r cl = 150 w 10 output current switching regulator v i 2 = 1.5 v, v o = 15 v, r cl = 150 w 15 ma (see figure 1) v i 2 = 6 v, v o = 30 v, r cl = 150 w 65 ma series regulator 100 standby current switching regulator v i 2 = 3 v, v o = 9 v 15 80 m a standb y c u rrent series regulator v i 1 = 15 v, v o = 9 v, r e 2 = 4.7 k w 0.8 1.2 ma note 5: voltage deviation is the output voltage difference that occurs in a change from series regulation to switching regulatio n: voltage deviation v o series regulation v o switching regulation
tl499a wide-range power-supply controllers slvs029f january 1984 revised may 2000 5 post office box 655303 ? dallas, texas 75265 application information tl499a l = 50 m h series in1 sw reg in2 r cl = 500 w output c f = 470 m f r e 1 r e 2 = 4.7 k w c p = 0.01 m f series in1 sw reg in2 ref sw current ctrl output sw in gnd (pwr) gnd + 1 3 8 7 6 5 8 1 2 3 4 figure 1. tl499a basic configuration table 1. maximum output current vs input and output voltages for step-up switching regulator with r cl = 150 w output switching regulator input voltage (sw reg in2) (v) output voltage 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 (v) output current (ma) 30 65 90 25 50 80 100 20 20 25 30 80 100 100 15 15 20 30 45 55 100 100 100 12 10 15 20 25 30 40 55 70 100 100 100 10 15 20 25 30 35 45 65 80 100 100 9 20 25 25 35 40 50 70 90 100 100 6 30 35 40 45 55 75 95 100 5 35 40 45 55 70 85 100 100 circuit of figure 1, except: 4.5 35 45 50 60 75 95 100 100 2 r cl = 150 w 3 55 65 2 75 2 95 2 100 2 c f = 330 m f 2.9 60 2 70 2 75 2 100 2 100 2 c p = 0.1 m f 2 the difference between the output and input voltage for these combinations is greater than the minimum output-to-input differential-voltage specification at 70 c (1.2 v), but less than the minimum at 85 c (1.9 v).
tl499a wide-range power-supply controllers slvs029f january 1984 revised may 2000 6 post office box 655303 ? dallas, texas 75265 application information table 2. maximum output current vs input and output voltages for step-up switching regulator with r cl = 200 w output switching regulator input voltage (sw reg in2) (v) output voltage 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 (v) output current (ma) 30 50 100 25 50 70 100 20 15 25 30 70 90 100 15 10 15 25 35 45 90 100 100 12 10 10 15 20 25 35 45 60 100 100 100 10 15 20 20 25 30 40 55 70 100 100 9 20 20 25 30 35 45 60 80 100 6 25 30 35 45 50 65 90 100 5 30 35 40 55 60 75 100 100 circuit of figure 1, except: 4.5 35 40 45 55 65 85 100 100 2 r cl = 200 w 3 50 55 2 65 2 80 2 90 2 c f = 330 m f 2.9 50 2 60 2 65 2 85 2 100 2 c p = 0.1 m f 2 the difference between the output and input voltage for these combinations is greater than the minimum output-to-input differential-voltage specification at 70 c (1.2 v), but less than the minimum at 85 c (1.9 v). table 3. maximum output current vs input and output voltages for step-up switching regulator with r cl = 300 w output switching regulator input voltage (sw reg in2) (v) output voltage 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 (v) output current (ma) 30 40 70 25 40 55 100 20 10 15 20 55 70 100 15 10 10 20 30 35 75 95 100 12 10 10 10 15 20 25 35 45 95 100 100 10 15 15 15 20 25 30 45 55 100 100 9 15 15 20 25 30 35 50 60 100 100 6 25 25 30 35 45 55 70 90 5 30 30 35 45 50 65 85 100 circuit of figure 1, except: 4.5 30 35 40 45 55 70 95 100 2 r cl = 300 w 3 45 50 2 55 2 70 2 90 2 c f = 330 m f 2.9 45 2 50 2 60 2 75 2 95 2 c p = 0.1 m f 2 the difference between the output and input voltage for these combinations is greater than the minimum output-to-input differential-voltage specification at 70 c (1.2 v), but less than the minimum at 85 c (1.9 v).
tl499a wide-range power-supply controllers slvs029f january 1984 revised may 2000 7 post office box 655303 ? dallas, texas 75265 application information table 4. maximum output current vs input and output voltages for step-up switching regulator with r cl = 510 w output switching regulator input voltage (sw reg in2) (v) output voltage 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 (v) output current (ma) 30 30 50 25 25 40 75 20 40 55 90 15 15 20 55 70 100 12 10 15 25 35 65 80 100 10 10 20 25 30 40 70 85 9 10 10 10 15 20 25 35 45 75 100 6 15 20 20 25 30 35 50 60 5 20 20 25 30 35 45 55 70 circuit of figure 1, except: 4.5 20 25 30 35 40 50 65 90 2 r cl = 510 w 3 35 35 2 40 2 50 2 75 2 c f = 330 m f 2.9 35 2 35 2 40 2 55 2 80 2 c p = 0.1 m f 2 the difference between the output and input voltage for these combinations is greater than the minimum output-to-input differential-voltage specification at 70 c (1.2 v), but less than the minimum at 85 c (1.9 v). table 5. maximum output current vs input and output voltages for step-up switching regulator with r cl = 1 k w output switching regulator input voltage (sw reg in2) (v) output voltage 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 (v) output current (ma) 30 35 25 35 50 20 35 60 15 10 30 45 65 12 20 40 45 85 10 15 25 40 55 9 10 10 15 25 30 45 60 6 10 10 10 15 20 20 30 35 5 10 10 15 20 20 25 35 40 circuit of figure 1, except: 4.5 15 15 15 20 25 30 40 45 2 r cl = 1 k w 3 20 25 2 25 2 30 2 35 2 c f = 330 m f 2.9 20 2 25 2 25 2 30 2 45 2 c p = 0.1 m f 2 the difference between the output and input voltage for these combinations is greater than the minimum output-to-input differential-voltage specification at 70 c (1.2 v), but less than the minimum at 85 c (1.9 v).
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