rp100 series low noise 200ma ldo regulator preliminary no.ea-006-0926 1 outline the rp100 series are cmos-based voltage regulator ics with high output voltage accuracy, extremely low supply current, low on-resistance, and high ripple rejection. each of these ics consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a current limit circuit, and a chip enable circuit. these ics perform with low dropout voltage and a chip enable function. the line transient response and load transient response of the rp100 series are excellent, thus these ics are very suitable for the power supply for hand-held communication equipment. the output voltage of these ics is fixed with high accuracy. since the packages for these ics are plp therefore high density mounting of the ics on boards is possible. features ? low supply current...................................................................... typ. 18 a ? standby mode .............................................................................. typ. 0.1 a ? low dropout voltage .................................................................... typ. 0.14v (i out =150ma 2.5v output type) ? high ripple rejection................................................................... typ. 75db (f = 1khz 2.5v output type) ? low temperature-drift coefficient of output voltage typ. 30ppm/ c ? excellent line regulation............................................................. typ. 0.02%/v ? high output voltage accuracy...................................................... 0.8 % ? small packages............................................................................ plp1612-4, sot-23-5 ? output voltage.............................................................................. 1.2v, 1.3v, 1.5v, 1.8v, 1.85v, 1.9v , 2.0v, 2.5v 2.6v, 2.7v, 2.8v, 2.85v, 2.9v, 3.0v, 3.1v, 3.3v ? built-in fold back protection circuit............................................. typ. 40ma (current at short mode) ? ceramic capacitors are recommended to be used with this ic ?. c in = c out = 1 f or more applications ? power source for portable communication equipment. ? power source for electrical appliances such as cameras, vcrs and camcorders. ? power source for battery-powered equipment.
rp100 2 block diagrams rp100xxx1b rp100xxx1d selection guide the output voltage, version, and the taping type for the ics can be selected at the user?s request. the selection can be made with designating the part number as shown below; rp100xxx 1x-xx part number a b c d code contents a designation of package type: k: plp1612-4 n: sot-23-5 b setting output voltage (v out ): 1.2v, 1.3v, 1.5v, 1.8v, 1.85v, 1.9v, 2.0v, 2.5v, 2.6v, 2.7v, 2.8v, 2.85v, 2.9v, 3.0v, 3.1v, 3.3v c designation of active type: b: active high type d: active high, with auto discharge d designation of taping type: ex. tr (refer to taping specifications; tr type is the standard direction.) vref current limit + - gnd v dd v dd vref current limit + - gnd v out v out ce ce
rp100 3 pin configuration plp1612-4 sot-23-5 v dd ce v out gnd nc 1 5 3 2 4 mark side top view 1 2 3 4 v out v dd ce gnd 2 1 bottom view 4 3 gnd ce v dd v out
rp100 4 pin descriptions ? rp100k(plp1612-4) pin no. symbol description 1 v out output pin 2 gnd ground pin 3 ce chip enable pin (?h? active) 4 v dd input pin tab in the parts have gnd level. (they are connected to the reverse side of this ic.) do not connect to other wires or land patterns. ? rp100n (sot-23-5) pin no. symbol description 1 v dd input pin 2 gnd ground pin 3 ce chip enable pin (?h? active) 4 nc no connection 5 v out output pin absolute maximum ratings symbol item rating unit v in input voltage 6.0 v v ce input voltage (ce pin) 6.0 v v out output voltage ? 0.3~v in + 0.3 v i out output current 300 ma plp1612-4 610* p d power dissipation sot-23-5 (free air) 250 mw topt operating temperature range ? 40~85 c tstg storage temperature range ? 55~125 c * measurement conditions environment: mounting on board (wind velocity=0m/s) board material: glass cloth epoxy plastic (double sided) board dimensions: 40mm*40mm*1.6mm copper ratio: top side approx. 50%, back side approx. 50% through-hole: 0.54mm*24pcs
rp100 5 electrical characteristics ? rp100xxx ? v in = set v out + 1v, i out =1ma, c in =c out =1f, unless otherwise noted. topt = 25 c symbol item conditions min. typ. max. unit v out output voltage (*1) v out 0.992 (-16mv) v out 1.008 (16mv) v i out output current 200 ma ? v out / ? i out load regulation 1ma < = i out < = 150ma 20 40 mv 1.2v < = set v out < 1.5v 0.40 0.50 v 1.5v < = set v out < 1.7v 0.24 0.38 v 1.7v < = set v out < 2.0v 0.21 0.34 v 2.0v < = set v out < 2.5v 0.17 0.30 v 2.5v < = set v out < 2.8v 0.14 0.25 v v dif dropout voltage iout=150ma 2.8v < = set v out < = 3.3v 0.13 0.23 v i ss supply current i out = 0ma 18 25 a istandby supply current (standby) v ce = 0v 0.1 2.0 a ? v out / ? v in line regulation set v out +0.5v < = v in 5.0v 0.02 0.10 %/v rr ripple rejection f=1khz ,ripple 0.2vp-p v in =set v out +1v, i out =30ma (in case that v out < = 2.0v, v in =3v) 75 db v in input voltage 1.7 5.0 v ? v out / ? t output voltage temperature coefficient ? 40 c < = topt < = 85 c 30 ppm / c i lim short current limit v out = 0v 40 ma i pd ce pull-down current 0.3 a v ceh ce input voltage ?h? 1.5 v v cel ce input voltage ?l? 0.3 v en output noise bw = 10hz to 100khz i out =30ma 30 vrms r low nch on resistance for auto discharge (d version only) v in =4.0v, v ce =0v 30 ? (*1) vout < = 2.0v 16mv accuracy
rp100 6 test circuits fig.1 basic test circuit fig.2 test circuit for supply current fig.3 test circuit for ripple rejection i out vout v in c1 c2 vdd out ce gnd v rp100 series v in c1 c2 vdd out ce gnd a rp100 series i out pulse generator c2 vdd out ce gnd p g rp100 series
rp100 7 fig.4 test circuit for load transient response technical notes when using these ics, consider the following points: phase compensation in these ics, phase compensation is made for securing stable operation even if the load current is varied. for this purpose, use a capacitor c out with good frequency characteristics and esr (equivalent series resistance). (note: if additional ceramic capacitors are connected with parallel to the output pin with an output capacitor for phase compensation, the operation might be unstable. because of this, test these ics with as same external components as ones to be used on the pcb.) pcb layout make v dd and gnd lines sufficient. if their impedance is high, noise pickup or unstable operation may result. connect a capacitor with a capacitance value as much as 1.0 f or more between v dd and gnd pin, and as close as possible to the pins. set external components, especially the output capacitor, as close as possible to the ics, and make wiring as short as possible. typical application i out a v in c1 c2 vdd out ce gnd i out b rp100 series c1 c2 vdd out ce gnd in out rp100 series
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