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tl499a slvs029h ? january 1984 ? revised november 2015 tl499a wide-range power-supply controllers 1 features 3 description the tl499a device is an integrated circuit designed 1 ? internal series-pass and step-up switching to provide a wide range of adjustable regulated regulator supply voltages. the regulated output voltage can be ? output adjustable from 2.9 v to 30 v varied from 2.9 v to 30 v by adjusting two external ? 1-v to 10-v input for switching regulator resistors. when the tl499a is ac-coupled to line power through a step-down transformer, it operates ? 4.5-v to 32-v input for series regulator as a series dc voltage regulator to maintain the ? externally controlled switching current regulated output voltage. with the addition of a ? no external rectifier required battery from 1.1 v to 10 v, an inductor, a filter capacitor, and two resistors, the tl499a operates as 2 applications a step-up switching regulator during an ac-line failure. the adjustable regulated output voltage ? voltage boosting makes the tl499a useful for a wide range of ? dual-supply voltage reglation applications. providing backup power during an ac- line failure makes the tl499a extremely useful in ? battery back-ups microprocessor memory applications. the tl499ac ? microprocessor memory power is characterized for operation from ? 20 c to +85 c. device information (1) part number package (pin) body size (nom) so (8) 6.20 mm 5.30 mm tl499a pdip (8) 9.81 mm 6.35 mm (1) for all available packages, see the orderable addendum at the end of the data sheet. typical application 1 an important notice at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. production data. tl499a l = 50 h series in1 sw reg in2 r cl = 500 output c f = 470 f r e 1 r e 2 = 4.7 k c p = 0.01 f series in1 sw reg in2 ref sw current ctrl output sw in gnd (pwr) gnd + 13 87 6 5 8 12 3 4 productfolder sample &buy technical documents tools & software support &community
tl499a slvs029h ? january 1984 ? revised november 2015 www.ti.com table of contents 7.3 feature description ................................................... 6 1 features .................................................................. 1 7.4 device functional modes .......................................... 6 2 applications ........................................................... 1 8 application and implementation .......................... 7 3 description ............................................................. 1 8.1 application information .............................................. 7 4 revision history ..................................................... 2 8.2 typical application ................................................... 7 5 pin configuration and functions ......................... 3 9 power supply recommendations ...................... 10 6 specifications ......................................................... 3 10 layout ................................................................... 11 6.1 absolute maximum ratings ...................................... 3 10.1 layout guidelines ................................................. 11 6.2 esd ratings ............................................................ 3 10.2 layout example .................................................... 11 6.3 recommended operating conditions ....................... 4 11 device and documentation support ................. 12 6.4 thermal information .................................................. 4 11.1 community resources .......................................... 12 6.5 electrical characteristics ........................................... 4 11.2 trademarks ........................................................... 12 6.6 typical characteristics .............................................. 5 11.3 electrostatic discharge caution ............................ 12 7 detailed description .............................................. 6 11.4 glossary ................................................................ 12 7.1 overview ................................................................... 6 12 mechanical, packaging, and orderable 7.2 functional block diagram ......................................... 6 information ........................................................... 12 4 revision history note: page numbers for previous revisions may differ from page numbers in the current version. changes from revision g (september 2001) to revision h page ? added pin configuration and functions section, esd ratings table, feature description section, device functional modes , application and implementation section, power supply recommendations section, layout section, device and documentation support section, and mechanical, packaging, and orderable information section .............................. 1 2 submit documentation feedback copyright ? 1984 ? 2015, texas instruments incorporated product folder links: tl499a
tl499a www.ti.com slvs029h ? january 1984 ? revised november 2015 5 pin configuration and functions p or ps package 8-pin pdip or so top view pin functions pin i/o description name no. gnd 5 ? signal ground. gnd (pwr) 7 ? power ground. output 8 o regulated output ref 2 i feedback tap for output voltage series in1 1 ? power source for series voltage regulator. sw current ctrl 4 i/o resistor to ground controls switching current sw in 6 i/o step up switching inductor node sw reg in2 3 ? power source for step-up switching regulator. 6 specifications 6.1 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) (1) min max unit v o output voltage (2) ? 0.3 35 v v i 1 input voltage, series regulator ? 0.3 35 v v i 2 input voltage, switching regulator ? 0.3 10 v blocking-diode reverse voltage 35 v blocking-diode forward current 1 a sw in power switch current 1 a lead temperature 1.6 mm (1/16 inch) from case for 10 seconds 260 c t j junction temperature 150 c t stg storage temperature ? 65 150 c (1) stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions . exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) all voltage values are with respect to network ground terminal. 6.2 esd ratings value unit human body model (hbm), per ansi/esda/jedec js-001 (1) 200 electrostatic v (esd) v discharge charged-device model (cdm), per jedec specification jesd22-c101 (2) 2000 (1) jedec document jep155 states that 500-v hbm allows safe manufacturing with a standard esd control process. manufacturing with less than 500-v hbm is possible with the necessary precautions. pins listed as 200-v may actually have higher performance. (2) jedec document jep157 states that 250-v cdm allows safe manufacturing with a standard esd control process. copyright ? 1984 ? 2015, texas instruments incorporated submit documentation feedback 3 product folder links: tl499a 12 3 4 87 6 5 series in1 ref sw reg in2 output gnd (pwr) sw in gnd sw current ctrl
tl499a slvs029h ? january 1984 ? revised november 2015 www.ti.com 6.3 recommended operating conditions over operating free-air temperature range (unless otherwise noted) 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 (1) ) 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 filter capacitor 100 470 f pass capacitor 0.1 f inductor, l (dcr 0.1 ) 50 150 h operating free-air temperature, t a ? 20 85 c (1) 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. 6.4 thermal information tl499a thermal metric (1) p (pdip) ps (so) unit 8 pins 8 pins r ja junction-to-ambient thermal resistance (2) (3) 49.7 110.7 c/w r jc(top) junction-to-case (top) thermal resistance 38.8 69.0 c/w r jb junction-to-board thermal resistance 26.9 55.7 c/w jt junction-to-top characterization parameter 16.1 20.1 c/w jb junction-to-board characterization parameter 26.7 54.9 c/w (1) for more information about traditional and new thermal metrics, see the semiconductor and ic package thermal metrics application report, spra953 . (2) maximum power dissipation is a function of t j(max) , ja , and t a . the maximum allowable power dissipation at any allowable ambient temperature is p d = (t j(max) ? t a ) / 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 51-7. 6.5 electrical characteristics over operating free-air temperature range (unless otherwise noted) parameter test conditions min typ max unit voltage deviation (see (1) ) 20 30 mv/v t a = ? 20 c to 70 c 1.2 v o ? v i 2 switching regulator minimum boost v t a = ? 20 c to 85 c 1.9 dropout voltage series regulator v i 1 = 15 v, i o = 50 ma 1.8 v reference voltage (internal) v i 1 = 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, 10 r cl = 150 , t a = 25 c v i 2 = 1.5 v, v o = 15 v, switching regulator 15 output current r cl = 150 , t a = 25 c ma (see figure 3 ) v i 2 = 6 v, v o = 30 v, 65 r cl = 150 , t a = 25 c series regulator 100 switching regulator v i 2 = 3 v, v o = 9 v, t a = 25 c 15 80 a standby current series regulator v i 1 = 15 v, v o = 9 v, r e 2 = 4.7 k 0.8 1.2 ma (1) voltage deviation is the output voltage difference that occurs in a change from series regulation to switching regulation: voltage deviation = v o (series regulation) ? v o (switching regulation) 4 submit documentation feedback copyright ? 1984 ? 2015, texas instruments incorporated product folder links: tl499a
tl499a www.ti.com slvs029h ? january 1984 ? revised november 2015 6.6 typical characteristics figure 1. switch saturation voltage vs temperature figure 2. diode forward voltage vs temperature copyright ? 1984 ? 2015, texas instruments incorporated submit documentation feedback 5 product folder links: tl499a 0.700 0.750 0.800 0.850 0.900 0.950 1.000 1.050 1.100 1.150 1.200 20 5 10 25 40 55 70 85 diode voltage (v) temperature (c) i = 0.5 a i = 1.0 a c001 0.310 0.320 0.330 0.340 0.350 0.360 0.370 0.380 20 5 10 25 40 55 70 85 saturation voltage (v) temperature (c) sw in = 1.1 v sw in = 3.0 v c001
tl499a slvs029h ? january 1984 ? revised november 2015 www.ti.com 7 detailed description 7.1 overview the tl499a provides an adjustable output voltage between 2.9 v and 30 v. the primary power source uses the internal linear regulator to provide the output voltage. when the primary power source is removed, the secondary power source is stepped up using the internal switching regulator to provide the output voltage. 7.2 functional block diagram 7.3 feature description the tl499a has an adjustable output voltage set by feedback provided to ref pin abs an adjustable switching current is set by value of resistor on sw current control pin. the lower resistance provides increased switching current. dual power supply inputs also provide protection against power faults on the main supply of the tl499a. 7.4 device functional modes the tl499a has two functional modes: ? linear voltage regulation when series in1 supply is present. ? step-up voltage regulation when series in1 supply is absent. 6 submit documentation feedback copyright ? 1984 ? 2015, texas instruments incorporated product folder links: tl499a 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 31 5 6 87 4 2 + + + C + C
tl499a www.ti.com slvs029h ? january 1984 ? revised november 2015 8 application and implementation note information in the following applications sections is not part of the ti component specification, and ti does not warrant its accuracy or completeness. ti ? s customers are responsible for determining suitability of components for their purposes. customers should validate and test their design implementation to confirm system functionality. 8.1 application information one or two power sources will be regulated to an output voltage set by two feedback resistors. 8.2 typical application figure 3 shows the basic configuration of the two power source voltage regulator figure 3. tl499a basic configuration 8.2.1 design requirements provide one or more of the following power sources: ? series in1 voltage greater than output voltage by more than dropout voltage ? sw reg in2 voltage less than output voltage select r cl value based on table 1 through table 5 . table 1. maximum output current vs input and output voltages for step-up switching regulator with r cl = 150 switching regulator input voltage (sw reg in2) (v) output 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 voltage (v) output current (ma) 30 65 90 25 50 80 100 20 20 25 30 85 100 100 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 copyright ? 1984 ? 2015, texas instruments incorporated submit documentation feedback 7 product folder links: tl499a tl499a l = 50 h series in1 sw reg in2 r cl = 500 output c f = 470 f r e 1 r e 2 = 4.7 k c p = 0.01 f series in1 sw reg in2 ref sw current ctrl output sw in gnd (pwr) gnd + 13 87 6 5 8 12 3 4
tl499a slvs029h ? january 1984 ? revised november 2015 www.ti.com typical application (continued) table 1. maximum output current vs input and output voltages for step-up switching regulator with r cl = 150 (continued) switching regulator input voltage (sw reg in2) (v) output 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 voltage (v) output current (ma) 5 35 40 45 55 70 85 100 100 circuit of figure 1 , except: 4.5 35 45 50 60 75 95 100 100 (1) r cl = 150 c f = 330 f 3 55 65 (1) 75 (1) 95 (1) 100 (1) c p = 0.1 f 2.9 60 (1) 70 (1) 75 (1) 100 (1) 100 (1) (1) 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 2. maximum output current vs input and output voltages for step-up switching regulator with r cl = 200 switching regulator input voltage (sw reg in2) (v) output 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 voltage (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 (1) r cl = 200 c f = 330 f 3 50 55 (1) 65 (1) 80 (1) 90 (1) c p = 0.1 f 2.9 50 (1) 60 (1) 65 (1) 85 (1) 100 (1) (1) 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 switching regulator input voltage (sw reg in2) (v) output 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 voltage (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 8 submit documentation feedback copyright ? 1984 ? 2015, texas instruments incorporated product folder links: tl499a
tl499a www.ti.com slvs029h ? january 1984 ? revised november 2015 table 3. maximum output current vs input and output voltages for step-up switching regulator with r cl = 300 (continued) switching regulator input voltage (sw reg in2) (v) output 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 voltage (v) output current (ma) 5 30 30 35 45 50 65 85 100 circuit of figure 1 , except: 4.5 30 35 40 45 55 70 95 100 (1) r cl = 300 c f = 330 f 3 45 50 (1) 55 (1) 70 (1) 90 (1) c p = 0.1 f 2.9 45 (1) 50 (1) 60 (1) 75 (1) 95 (1) (1) 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 4. maximum output current vs input and output voltages for step-up switching regulator with r cl = 510 switching regulator input voltage (sw reg in2) (v) output 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 voltage (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 35 30 35 45 55 70 circuit of figure 1 , except: 4.5 25 25 30 35 40 50 65 90 (1) r cl = 510 c f = 330 f 3 35 35 (1) 40 (1) 50 (1) 75 (1) c p = 0.1 f 2.9 35 (1) 35 (1) 40 (1) 55 (1) 80 (1) (1) 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 switching regulator input voltage (sw reg in2) (v) output 1.1 1.2 1.3 1.5 1.7 2 2.5 3 5 6 9 voltage (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 (1) r cl = 1 k c f = 330 f 3 20 25 (1) 25 (1) 30 (1) 35 (1) c p = 0.1 f 2.9 20 (1) 25 (1) 25 (1) 30 (1) 45 (1) (1) 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). copyright ? 1984 ? 2015, texas instruments incorporated submit documentation feedback 9 product folder links: tl499a
tl499a slvs029h ? january 1984 ? revised november 2015 www.ti.com 8.2.2 detailed design procedure select the values for r e 1and r e 2 using equation 1 : vout = ref ( 1 + r e 1/ r e 2) (1) 8.2.3 application curve i out = 50 ma figure 4. dropout voltage vs temperature 9 power supply recommendations see recommended operating conditions for allowable range for the power supply. bypass capacitors must be placed near device supply pins. 10 submit documentation feedback copyright ? 1984 ? 2015, texas instruments incorporated product folder links: tl499a 1.215 1.220 1.225 1.230 1.235 1.240 1.245 1.250 20 5 10 25 40 55 70 85 drop out voltage (v) temperature (c) c001
tl499a www.ti.com slvs029h ? january 1984 ? revised november 2015 10 layout 10.1 layout guidelines the switching nodes at pins 3, 6, 7, and 8 must use short traces with ground and power planes for reduced noise and improved performance. 10.2 layout example figure 5. typical layout copyright ? 1984 ? 2015, texas instruments incorporated submit documentation feedback 11 product folder links: tl499a gnd plane to in1 supply in2 plane in2 plane gnd plane gnd plane 6 5 7 1 2 3 4 8 c2 vout cf ref in2 sw cc gnd pwr sw in gnd in1 output rcl gnd plane c1 re1 re2 cp
tl499a slvs029h ? january 1984 ? revised november 2015 www.ti.com 11 device and documentation support 11.1 community resources the following links connect to ti community resources. linked contents are provided "as is" by the respective contributors. they do not constitute ti specifications and do not necessarily reflect ti's views; see ti's terms of use . ti e2e ? online community ti's engineer-to-engineer (e2e) community. created to foster collaboration among engineers. at e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. design support ti's design support quickly find helpful e2e forums along with design support tools and contact information for technical support. 11.2 trademarks e2e is a trademark of texas instruments. all other trademarks are the property of their respective owners. 11.3 electrostatic discharge caution these devices have limited built-in esd protection. the leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the mos gates. 11.4 glossary slyz022 ? ti glossary . this glossary lists and explains terms, acronyms, and definitions. 12 mechanical, packaging, and orderable information the following pages include mechanical, packaging, and orderable information. this information is the most current data available for the designated devices. this data is subject to change without notice and revision of this document. for browser-based versions of this data sheet, refer to the left-hand navigation. 12 submit documentation feedback copyright ? 1984 ? 2015, texas instruments incorporated product folder links: tl499a
package option addendum www.ti.com 10-nov-2015 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples tl499acp active pdip p 8 50 pb-free (rohs) cu nipdau n / a for pkg type -20 to 85 tl499acp TL499ACPE4 active pdip p 8 50 pb-free (rohs) cu nipdau n / a for pkg type -20 to 85 tl499acp tl499acpsr active so ps 8 2000 green (rohs & no sb/br) cu nipdau level-1-260c-unlim -20 to 85 t499a (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. - the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device. (6) lead/ball finish - orderable devices may have multiple material finish options. finish options are separated by a vertical ruled line. lead/ball finish values may wrap to two lines if the finish value exceeds the maximum column width. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and
package option addendum www.ti.com 10-nov-2015 addendum-page 2 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis.
tape and reel information *all dimensions are nominal device package type package drawing pins spq reel diameter (mm) reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant tl499acpsr so ps 8 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.0 q1 package materials information www.ti.com 10-nov-2015 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) tl499acpsr so ps 8 2000 367.0 367.0 38.0 package materials information www.ti.com 10-nov-2015 pack materials-page 2

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