View MAX828-D_1963614.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

? semiconductor components industries, llc, 2001 april, 2001 rev. 2 1 publication order number: max828/d max828, max829 switched capacitor voltage converter the max828 and max829 are cmos charge pump voltage inverters that are designed for operation over an input voltage range of 1.15 v to 5.5 v with an output current capability in excess of 50 ma. the operating current consumption is only 68 a for the max828 and 118 a for the max829. the devices contain an internal oscillator that operates at 12 khz for the max828 and 35 khz for the max829. the oscillator drives four low resistance mosfet switches, yielding a low output resistance of 26 and a voltage conversion efficiency of 99.9%. these devices require only two external capacitors, 10 f for the max828 and 3.3 f for the max829, for a complete inverter making it an ideal solution for numerous battery powered and board level applications. the max828 and max829 are available in the space saving tsop5 (sot235) package. features ? operating voltage range of 1.15 v to 5.5 v ? output current capability in excess of 50 ma ? low current consumption of 68 a (max828) or 118 a (max829) ? operation at 12 khz (max828) or 35 khz (max829) ? low output resistance of 26 ? space saving tsop5 (sot235) package typical applications ? lcd panel bias ? cellular telephones ? pagers ? personal digital assistants ? electronic games ? digital cameras ? camcorders ? hand held instruments 5 4 2 3 1 figure 1. typical application v out v in this device contains 77 active transistors. tsop5 euk suffix case 483 http://onsemi.com device package shipping ordering information max828euk tsop5 3000 tape/reel 1 3 gnd v out tsop5* 2 v in c 4 c + 5 max829euk tsop5 3000 tape/reel pin configuration (top view) marking diagram xxx = device code max828 is eaa max829 is eab y = year w = work week xxxyw 1 5 1 5
max828, max829 http://onsemi.com 2 maximum ratings* rating symbol value unit input voltage range (v in to gnd) v in 0.3 to 6.0 v output voltage range (v out to gnd) v out 6.0 to 0.3 v output current (note 1.) i out 100 ma output short circuit duration (v out to gnd, note 1.) t sc indefinite sec operating junction temperature t j 150 c power dissipation and thermal characteristics thermal resistance, junction to air maximum power dissipation @ t a = 70 c r q ja p d 256 313 c/w mw storage temperature t stg 55 to 150 c *esd ratings esd machine model protection up to 200 v, class b esd human body model protection up to 2000 v, class 2 electrical characteristics (v in = 5.0 v for max828 c 1 = c 2 = 10 m f, for max829 c 1 = c 2 = 3.3 m f, t a = 40 c to 85 c, typical values shown are for t a = 25 c unless otherwise noted. see figure 20 for test setup.) characteristic symbol min typ max unit operating supply voltage range (r l = 10 k) v in 1.5 to 5.5 1.15 to 6.0 v supply current device operating (r l = ) t a = 25 c max828 max829 t a = 85 c max828 max829 i in 68 118 73 128 90 200 100 200 m a oscillator frequency t a = 25 c max828 max829 t a = 40 c to 85 c max828 max829 f osc 8.4 24.5 6.0 19 12 35 15.6 45.6 21 54 khz output resistance (i out = 25 ma, note 2.) max828 max829 r out 26 26 50 50 w voltage conversion efficiency (r l = ) v eff 99 99.9 % power conversion efficiency (r l = 1.0 k) p eff 96 % 1. maximum package power dissipation limits must be observed to ensure that the maximum junction temperature is not exceeded. t j t a (p d r ja ) 2. capacitors c 1 and c 2 contribution is approximately 20% of the total output resistance.
max828, max829 http://onsemi.com 3 figure 2. output resistance vs. supply voltage max828 figure 3. output resistance vs. supply voltage max829 35 30 20 25 15 10 0 70 1.0 20 5.0 60 3.5 v in , supply voltage (v) r out , output resistance (w) 40 2.5 v in , supply voltage (v) r out , output resistance (w) 50 90 50 25 0 80 70 60 50 20 25 100 figure 4. output resistance vs. ambient temperature max828 t a , ambient temperature ( c) figure 5. output resistance vs. ambient temperature max829 t a , ambient temperature ( c) figure 6. output current vs. capacitance max828 c 1 , c 2 , c 3 , capacitance ( m f) figure 7. output current vs. capacitance max829 c 1 , c 2 , c 3 , capacitance ( m f) i out , output current (ma) 80 030 20 10 40 50 80 60 20 90 100 t a = 25 c t a = 25 c t a = 25 c t a = 25 c v in = 1.5 v v in = 3.15 v v out = 2.5 v v in = 4.75 v v out = 4.0 v v in = 1.9 v v out = 1.5 v 70 50 30 5.5 4.5 4.0 3.0 2.0 20 60 40 80 70 50 30 40 30 75 50 40 30 50 50 25 0 25 100 75 5 35 30 20 25 15 10 0 030 20 10 40 50 5 figure 20 test setup figure 20 test setup v in = 2.0 v v in = 3.3 v v in = 5.0 v figure 20 test setup v in = 1.5 v v in = 2.0 v v in = 3.3 v v in = 5.0 v figure 20 test setup figure 20 test setup figure 20 test setup v in = 3.15 v v out = 2.5 v v in = 4.75 v v out = 4.0 v v in = 1.9 v v out = 1.5 v 90 100 1.5 90 100 1.0 5.0 3.5 2.5 5.5 4.5 4.0 3.0 2.0 1.5 r out , output resistance (w) r out , output resistance (w) i out , output current (ma)
max828, max829 http://onsemi.com 4 90 80 70 60 50 40 30 20 130 120 110 100 90 80 40 70 60 50 1.5 3.0 3.5 2.5 2.0 5.0 13.0 12.5 12.0 11.5 11.0 10.5 10.0 0 400 350 30 300 250 40 20 c 1 , c 2 , c 3 , capacitance ( m f) v out , output voltage ripple (mvpp) 200 150 100 50 10 c 1 , c 2 , c 3 , capacitance ( m f) figure 8. output voltage ripple vs. capacitance max828 figure 9. output voltage ripple vs. capacitance max829 figure 10. supply current vs. supply voltage max828 v in , supply voltage (v) figure 11. supply current vs. supply voltage max829 v in , supply voltage (v) i in , supply current ( m a) figure 12. oscillator frequency vs. ambient temperature max828 t a , ambient temperature ( c) figure 13. oscillator frequency vs. ambient temperature max829 t a , ambient temperature ( c) f osc , oscillator frequency (khz) 50 50 100 25 0 25 t a = 25 c 0 50 40 39 38 37 36 35 32 50 50 100 25 0 25 v in = 5.0 v 0 350 300 30 250 40 20 200 150 100 50 10 0 50 4.0 4.5 1.5 3.0 3.5 2.5 2.0 5.0 4.0 4.5 75 34 33 75 figure 20 test setup v in = 3.15 v v out = 2.5 v v in = 4.75 v v out = 4.0 v v in = 1.9 v v out = 1.5 v t a = 25 c figure 20 test setup v in = 3.15 v v out = 2.5 v v in = 4.75 v v out = 4.0 v v in = 1.9 v v out = 1.5 v figure 20 test setup t a = 85 c t a = 40 c t a = 25 c figure 20 test setup t a = 85 c t a = 40 c t a = 25 c figure 20 test setup v in = 3.3 v v in = 1.5 v r l = figure 20 test setup v in = 3.3 v v in = 1.5 v v in = 5.0 v r l = v out , output voltage ripple (mvpp) i in , supply current ( m a) f osc , oscillator frequency (khz)
max828, max829 http://onsemi.com 5 80 70 60 40 90 100 2.0 3.0 4.0 6.0 1.0 0 i out , output current (ma) v out , output voltage (v) i out , output current (ma) figure 14. output voltage vs. output current max828 figure 15. output voltage vs. output current max829 v out , output voltage (v) figure 16. power conversion efficiency vs. output current max828 i out , output current (ma) figure 17. power conversion efficiency vs. output current max829 i out , output current (ma) h , power conversion efficiency (%) 03040 20 10 50 0 40 50 30 20 10 040 30 20 50 10 t a = 25 c 5.0 2.0 3.0 4.0 6.0 1.0 0 5.0 50 80 70 60 40 90 100 040 30 20 50 10 50 figure 18. output voltage ripple and noise max828 figure 19. output voltage ripple and noise max829 v in = 5.0 v figure 20 test setup v in = 3.3 v v in = 2.0 v figure 20 test setup t a = 25 c v in = 5.0 v v in = 3.3 v v in = 2.0 v figure 20 test setup t a = 25 c v in = 5.0 v v in = 3.3 v v in = 2.0 v v in = 1.5 v figure 20 test setup t a = 25 c v in = 5.0 v v in = 3.3 v v in = 2.0 v v in = 1.5 v time = 25 m s/div time = 10 m s/div output voltage ripple & noise = 10 mv/div. ac coupled figure 20 test setup v in = 3.3 v i out = 5.0 ma t a = 25 c figure 20 test setup v in = 3.3 v i out = 5.0 ma t a = 25 c h , power conversion efficiency (%) output voltage ripple & noise = 10 mv/div. ac coupled
max828, max829 http://onsemi.com 6 max828: c 1 = c 2 = c 3 = 10 f max829: c 1 = c 2 = c 3 = 3.3 f 6 4 2 3 1 osc v out c 1 c 2 r l + + c 3 v in + figure 20. test setup/voltage inverter detailed operating description the max828/829 charge pump converters inverts the voltage applied to the v in pin. conversion consists of a twophase operation (figure 21). during the first phase, switches s 2 and s 4 are open and s 1 and s 3 are closed. during this time, c 1 charges to the voltage on v in and load current is supplied from c 2 . during the second phase, s 2 and s 4 are closed, and s 1 and s 3 are open. this action connects c 1 across c 2 , restoring charge to c 2 . figure 21. ideal switched capacitor charge pump s3 s4 c 2 c 1 s1 s2 v in v out from osc applications information output voltage considerations the max828/829 performs voltage conversion but does not provide regulation. the output voltage will drop in a linear manner with respect to load current. the value of this equivalent output resistance is approximately 26 w nominal at 25 c and v in = 5.0 v. v out is approximately 5.0 v at light loads, and drops according to the equation below: v drop i out r out v out (v in v drop ) charge pump efficiency the overall power efficiency of the charge pump is affected by four factors: 1. losses from power consumed by the internal oscillator, switch drive, etc. (which vary with input voltage, temperature and oscillator frequency). 2. i 2 r losses due to the onresistance of the mosfet switches onboard the charge pump. 3. charge pump capacitor losses due to equivalent series resistance (esr). 4. losses that occur during charge transfer from the commutation capacitor to the output capacitor when a voltage difference between the two capacitors exists. most of the conversion losses are due to factors 2, 3 and 4. these losses are given by equation 1. p loss(2,3,4) i out 2 r out i out 2 1 (f osc )c 1 8r switch 4esr c 1 esr c 2 (eq. 1) the 1/(f osc )(c 1 ) term in equation 1 is the ef fective output resistance of an ideal switched capacitor circuit (figures 22 and 23). the losses due to charge transfer above are also shown in equation 2. the output voltage ripple is given by equation 3. 0.5c 2 (v ripple 2 2v out v ripple )] f osc p loss [0.5c 1 (v in 2 v out 2 ) (eq. 2) v ripple i out (f osc )(c 2 ) 2(i out )(esr c 2 ) (eq. 3) r l c 2 c 1 v in v out f figure 22. ideal switched capacitor model r l c 2 v in v out r equiv r equiv 1 f c 1 figure 23. equivalent output resistance
max828, max829 http://onsemi.com 7 capacitor selection in order to maintain the lowest output resistance and output ripple voltage, it is recommended that low esr capacitors be used. additionally, larger values of c 1 will lower the output resistance and larger values of c 2 will reduce output voltage ripple. (see equation 3). table 1 shows various values of c 1 , c 2 and c 3 with the corresponding output resistance values at 25 c. table 2 shows the output voltage ripple for various values of c 1 , c 2 and c 3 . the data in tables 1 and 2 was measured not calculated. table 1. output resistance vs. capacitance (c 1 = c 2 = c 3 ), v in = 4.75 v and v out = 4.0 v c 1 = c 2 = c 3 ( f) max828 r out ( ) max829 r out ( ) 0.7 127.2 55.7 1.4 67.7 36.8 3.3 36 26.0 7.3 26.7 24.9 10 25.9 25.1 24 24.3 25.2 50 24 24 table 2. output voltage ripple vs. capacitance (c 1 = c 2 = c 3 ), v in = 4.75 v and v out = 4.0 v c 1 = c 2 = c 3 ( f) max828 ripple (mv) max829 ripple (mv) 0.7 377.5 320 1.4 360.5 234 3.3 262 121 7.3 155 62.1 10 126 51.25 24 55.1 25.2 50 36.6 27.85 input supply bypassing the input voltage, v in should be capacitively bypassed to reduce ac impedance and minimize noise effects due to the switching internals in the device. if the device is loaded from v out to gnd, it is recommended that a large value capacitor (at least equal to c 1 ) be connected from v in to gnd. if the device is loaded from v in to v out a small (0.7 m f) capacitor between the pins is sufficient. voltage inverter the most common application for a charge pump is the voltage inverter (figure 20). this application uses two or three external capacitors. the capacitors c 1 (pump capacitor) and c 2 (output capacitor) are required. the input bypass capacitor c 3 , may be necessary depending on the application. the output is equal to v in plus any voltage drops due to loading. refer to tables 1 and 2 for capacitor selection. the test setup used for the majority of the characterization is shown in figure 20. layout considerations as with any switching power supply circuit, good layout practice is recommended. mount components as close together as possible to minimize stray inductance and capacitance. also use a large ground plane to minimize noise leakage into other circuitry. capacitor resources selecting the proper type of capacitor can reduce switching loss. low esr capacitors are recommended. the max828 and max829 were characterized using the capacitors listed in table 3. this list identifies low esr capacitors for the voltage inverter application. table 3. capacitor types manufacturer/contact part types/series avx tps avx 8434489411 tps www.avxcorp.com cornell dubilier esrd cornell d u bilier 5089968561 ll d bili esrd www.cornelldubilier.com san y o/oscon sn sanyo/oscon 6196616835 id / ht sn svp www.sanyovideo.com/oscon.htm visha y 593d vishay 6032241961 ih 593d 594 www.vishay.com
max828, max829 http://onsemi.com 8 5 4 2 3 1 osc max828: capacitors = 10 m f max829: capacitors = 3.3 m f + v in v out figure 24. voltage inverter + + the max828 / 829 primary function is a voltage inverter. the device will convert 5.0 v into 5.0 v with light loads. two capacitors are required for the inverter to function. a third capacitor, the input bypass capacitor, may be required depending on the power source for the inverter. the performance for this device is illustrated below. 0 0.0 3.0 20 10 4.0 6.0 30 50 i out , output current (ma) v out , output voltage (v) figure 25. voltage inverter load regulation output voltage vs. output current max828 t a = 25 c i out , output current (ma) v out , output voltage (v) figure 26. voltage inverter load regulation output voltage vs. output current max829 t a = 25 c 5.0 2.0 1.0 40 0 0.0 3.0 20 10 4.0 6.0 30 50 5.0 2.0 1.0 40 v in = 3.3 v v in = 5.0 v v in = 3.3 v v in = 5.0 v
max828, max829 http://onsemi.com 9 5 4 2 3 1 osc max828 capacitors = 10 m f max829 capacitors = 3.3 m f v in 5 4 2 3 1 osc + + + figure 27. cascade devices for increased negative output voltage + + v out two or more devices can be cascaded for increased output voltage. under light load conditions, the output voltage is approximately equal to v in times the number of stages. the converter output resistance increases dramatically with each additional stage. this is due to a reduction of input voltage to each successive stage as the converter output is loaded. note that the ground connection for each successive stage must connect to the negative output of the previous stage. the performance characteristics for a converter consisting of two cascaded devices are shown below. 0 1.0 4.0 20 10 6.0 10.0 30 40 i out , output current (ma) v out , output voltage (v) figure 28. cascade load regulation, output voltage vs. output current max828 a b a 3.0 b 5.0 curve v in (v) 173 141 r out ( ) c 3.0 d 5.0 179 147 020 10 30 40 i out , output current (ma) v out , output voltage (v) figure 29. cascade load regulation, output voltage vs. output current max829 c d 8.0 2.0 3.0 5.0 7.0 9.0 1.0 4.0 6.0 10.0 8.0 2.0 3.0 5.0 7.0 9.0
max828, max829 http://onsemi.com 10 + 5 4 2 3 1 osc max828: capacitors = 10 m f max829: capacitors = 3.3 m f + v in v out figure 30. negative output voltage doubler + + + a single device can be used to construct a negative voltage doubler. the output voltage is approximately equal to 2v in minus the forward voltage drop of each external diode. the performance characteristics for the above converter are shown below. note that curves a and c show the circuit performance with economical 1n4148 diodes, while curves b and d are with lower loss mbra120e schottky diodes. 0 0.0 4.0 20 10 6.0 10.0 30 40 i out , output current (ma) v out , output voltage (v) figure 31. doubler load regulation, output voltage vs. output current max828 a b t a = 25 c c d a 3.0 1n4148 b 3.0 mbra120e curve v in (v) diodes 122 114 max828 r out ( ) c 5.0 1n4148 d 5.0 mbra120e 96 91 118 106 max829 r out ( ) 90 87 020 10 30 40 i out , output current (ma) v out , output voltage (v) figure 32. doubler load regulation, output voltage vs. output current max829 a b t a = 25 c c d 8.0 2.0 2.0 4.0 6.0 10.0 8.0
max828, max829 http://onsemi.com 11 + 5 4 2 3 1 osc max828: capacitors = 10 m f max829: capacitors = 3.3 m f + v in v out figure 33. negative output voltage tripler + + + + + a single device can be used to construct a negative voltage tripler. the output voltage is approximately equal to 3v in minus the forward voltage drop of each external diode. the performance characteristics for the above converter are shown below. note that curves a and c show the circuit performance with economical 1n4148 diodes, while curves b and d are with lower loss mbra120e schottky diodes. 0 0.0 4.0 20 10 6.0 14.0 30 40 i out , output current (ma) v out , output voltage (v) figure 34. tripler load regulation, output voltage vs. output current max828 a b t a = 25 c c d a 3.0 1n4148 b 3.0 mbra120e curve v in (v) diodes 259 251 max828 r out ( ) c 5.0 1n4148 d 5.0 mbra120e 209 192 246 237 max829 r out ( ) 198 185 020 10 30 40 i out , output current (ma) v out , output voltage (v) figure 35. tripler load regulation, output voltage vs. output current max829 a b t a = 25 c c d 8.0 2.0 10.0 12.0 0.0 4.0 6.0 14.0 8.0 2.0 10.0 12.0
max828, max829 http://onsemi.com 12 + 5 4 2 3 1 osc max828: capacitors = 10 m f max829: capacitors = 3.3 m f + v in + v out figure 36. positive output voltage doubler a single device can be used to construct a positive voltage doubler. the output voltage is approximately equal to 2v in minus the forward voltage drop of each external diode. the performance characteristics for the above converter are shown below. note that curves a and c show the circuit performance with economical 1n4148 diodes, while curves b and d are with lower loss mbra120e schottky diodes. 0 10.0 8.0 20 10 6.0 2.0 30 40 i out , output current (ma) v out , output voltage (v) figure 37. doubler load regulation, output voltage vs. output current max828 a b t a = 25 c c d a 3.0 1n4148 b 3.0 mbra120e curve v in (v) diodes 32.5 27.1 max828 r out ( ) c 5.0 1n4148 d 5.0 mbra120e 26.0 21.2 32.2 25.7 max829 r out ( ) 25.1 19.0 020 10 30 40 i out , output current (ma) v out , output voltage (v) figure 38. doubler load regulation, output voltage vs. output current max829 a b t a = 25 c c d 4.0 10.0 8.0 6.0 2.0 4.0
max828, max829 http://onsemi.com 13 + 5 4 2 3 1 osc max828: capacitors = 10 m f max829: capacitors = 3.3 m f + v in + v out figure 39. positive output voltage tripler + + a single device can be used to construct a positive voltage tripler. the output voltage is approximately equal to 3v in minus the forward voltage drop of each external diode. the performance characteristics for the above converter are shown below. note that curves a and c show the circuit performance with economical 1n4148 diodes, while curves b and d are with lower loss mbra120e schottky diodes. 0 14.0 12.0 20 10 10.0 8.0 2.0 30 40 i out , output current (ma) v out , output voltage (v) 6.0 figure 40. tripler load regulation, output voltage vs. output current max828 a b t a = 25 c c d a 3.0 1n4148 b 3.0 mbra120e curve v in (v) diodes 110 96.5 max828 r out ( ) c 5.0 1n4148 d 5.0 mbra120e 84.5 78.2 111 96.7 max829 r out ( ) 87.3 77.1 020 10 30 40 i out , output current (ma) v out , output voltage (v) figure 41. tripler load regulation, output voltage vs. output current max829 a b t a = 25 c c d 4.0 14.0 12.0 10.0 8.0 2.0 6.0 4.0
max828, max829 http://onsemi.com 14 + 5 4 2 3 1 osc max828 capacitors = 10 m f max829 capacitors = 3.3 m f v in 5 4 2 3 1 osc + v out + + figure 42. paralleling devices for increased negative output current an increase in converter output current capability with a reduction in output resistance can be obtained by paralleling two or more devices. the output current capability is approximately equal to the number of devices paralleled. a single shared output capacitor is sufficient for proper operation but each device does require it's own pump capacitor. note that the output ripple frequency will be complex since the oscillators are not synchronized. the output resistance is approximately equal to the output resistance of one device divided by the total number of devices paralleled. the performance characteristics for a converter consisting of two paralleled devices is shown below. 0 1.0 2.0 40 20 3.0 4.0 5.0 80 100 i out , output current (ma) v out , output voltage (v) 60 figure 43. parallel load regulation, output voltage vs. output current max828 a b a 5.0 b 3.0 curve v in (v) 13.3 17.3 r out ( w ) 0 1.0 2.0 40 20 3.0 4.0 5.0 80 100 i out , output current (ma) v out , output voltage (v) 60 figure 44. parallel load regulation, output voltage vs. output current max829 c d c 5.0 d 3.0 14.4 17.3 t a = 25 c t a = 25 c
max828, max829 http://onsemi.com 15 + 5 4 2 3 1 osc + v in v out q 1 c 3 v out = v in v be(q1) v be(q2) 2 v f + c 2 q 2 c 1 c 1 = c 2 = 470 m f c 3 = 220 m f q 1 = pzt751 q 2 = pzt651 figure 45. external switch for increased negative output current the output current capability of the max828 and max829 can be extended beyond 600 ma with the addition of two external switch transistors and two schottky diodes. the output voltage is approximately equal to v in minus the sum of the base emitter drops of both transistors and the forward voltage of both diodes. the performance characteristics for the converter are shown below. note that the output resistance is reduced to 0.9 and 1.0 ohms for the 828 and 829 respectively. 2.6 i out , output current (a) v out , output voltage (v) 0 0.4 0.5 0.3 0.2 0.1 0.6 3.2 2.4 2.8 2.2 figure 46. current boosted load regulation, output voltage vs. output current max828 v in = 5.0 v r out = 0.9 w t a = 25 c 3.0 2.6 i out , output current (a) v out , output voltage (v) 0 0.4 0.5 0.3 0.2 0.1 0.6 3.2 2.4 2.8 2.2 2.0 figure 47. current boosted load regulation, output voltage vs. output current max829 v in = 5.0 v r out = 1.0 w t a = 25 c 3.0
max828, max829 http://onsemi.com 16 figure 48. positive output voltage doubler with high current capability + 5 4 2 3 1 osc + v in v out q 1 c 3 + c 2 q 2 c 1 capacitors = 220 m f q 1 = pzt751 q 2 = pzt651 50 50 the max828 / 829 can be configured to produce a positive output voltage doubler with current capability in excess of 500 ma. this is accomplished with the addition of two external switch transistors and two schottky diodes. the output voltage is approximately equal to 2v in minus the sum of the base emitter drops of both transistors and the forward voltage of both diodes. the performance characteristics for the converter are shown below. note that the output resistance is reduced to 1.8 ohms. 8.0 i out , output current (ma) v out , output voltage (v) 0 0.4 0.5 0.3 0.2 0.1 6.8 8.4 7.6 8.8 figure 49. positive doubler with current boosted load regulation, output voltage vs. output current, max828 v in = 5.0 v r out = 1.8 w t a = 25 c 7.2 i out , output current (ma) v out , output voltage (v) 7.0 9.0 figure 50. positive doubler with current boosted load regulation, output voltage vs. output current, max829 v in = 5.0 v r out = 1.8 w t a = 25 c 7.4 8.6 8.2 7.8 0.6 0 0.4 0.5 0.3 0.2 0.1 0.6
max828, max829 http://onsemi.com 17 + 5 4 2 3 1 osc max828: capacitors = 10 m f max829: capacitors = 3.3 m f + + v in + + +v out figure 51. a positive doubler, with a negative inverter v out all of the previously shown converter circuits have only single outputs. applications requiring multiple outputs can be constructed by incorporating combinations of the former circuits. the converter shown above combines figures 24 and 36 to form a negative output inverter with a positive output doubler. different combinations of load regulation are shown below. in figure s 52 and 53 the positive doubler has a constant i out = 15 ma while the negative inverter has the variable load. in figures 54 and 55 the negative inverter has the constant i out = 15 ma and the positive doubler has the variable load. i out , negative inverter output current (ma) v out , output voltage (v) 030 20 10 5.0 9.0 4.5 9.5 figure 52. negative inverter load regulation, output voltage vs. output current, max828 8.5 4.0 i out , negative inverter output current (ma) v out , output voltage (v) figure 53. negative inverter load regulation, output voltage vs. output current, max829 negative inverter r out = 28 w 030 20 10 5.0 9.0 4.5 9.5 8.5 4.0 positive doubler positive doubler negative inverter negative inverter t a = 25 c negative inverter r out = 28.8 w i out = 15 ma t a = 25 c i out = 15 ma i out , positive doubler output current (ma) v out , output voltage (v) figure 54. positive doubler load regulation, output voltage vs. output current, max828 positive doubler i out , positive doubler output current (ma) v out , output voltage (v) figure 55. positive doubler load regulation, output voltage vs. output current, max829 030 20 10 5.0 9.0 4.5 9.5 8.5 4.0 030 20 10 5.0 9.0 4.5 9.5 8.5 4.0 t a = 25 c positive doubler negative inverter negative inverter t a = 25 c negative inverter i out = 15 ma negative inverter i out = 15 ma r out = 21.4 w r out = 20 w
max828, max829 http://onsemi.com 18
max828, max829 http://onsemi.com 19 figure 56. inverter circuit board layout, top view copper side v in gnd ic1 c 1 inverter size = 0.5 in x 0.2 in area = 0.10 in 2 , 64.5 mm 2 v out gnd c 3 + c 2 + 0.5 + taping form pin 1 user direction of feed component taping orientation for tsop5 devices standard reel component orientation (mark right side up) device marking tsop5 package tape width (w) pitch (p) part per full reel diameter 8 mm 4 mm 3000 7 inches tape & reel specifications table
max828, max829 http://onsemi.com 20 package dimensions tsop5 plastic package case 48301 issue a notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. maximum lead thickness includes lead finish thickness. minimum lead thickness is the minimum thickness of base material. dim min max min max inches millimeters a 2.90 3.10 0.1142 0.1220 b 1.30 1.70 0.0512 0.0669 c 0.90 1.10 0.0354 0.0433 d 0.25 0.50 0.0098 0.0197 g 0.85 1.00 0.0335 0.0413 h 0.013 0.100 0.0005 0.0040 j 0.10 0.26 0.0040 0.0102 k 0.20 0.60 0.0079 0.0236 l 1.25 1.55 0.0493 0.0610 m 0 10 0 10 s 2.50 3.00 0.0985 0.1181 0.05 (0.002) 123 54 s a g l b d h c k m j on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 13036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. max828/d north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland

▲Up To Search▲

Price & Availability of MAX828-D

	To Download MAX828-D Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .