1 (8) da9124.003 25 october, 2001 mas9124 150 ma ldo voltage regulator ic ? low noise: 20 vrms ? low minimum output capacitance requirement: 0.22 f ? excellent ripple rejection: 65 db ? very low dropout: 70 mv ? regulator enable/disable control ? stable with low-esr output capacitors description mas9124 is a low dropout voltage regulator with an enable/disable pin, which allows device to be turned off or on by pulling control to low or high. due to the low noise level of only 20 vrms, mas9124 is suitable for sensitive circuits, e.g., in portable applications. in addition to the noise levels, mas9124 excels in dropout voltage (70 mv typical at 50 ma) and rise time (16 s typical without bypass capacitor). also its ripple rejection ability of 65 db at 10 khz exceeds that of competition. the equivalent series resistance (esr) range of output capacitors that can be used with mas9124 is very wide. this esr range from a few m ? up to a couple of ohms combined with no minimum output current requirement makes the usage of mas9124 easier and low in cost. in order to save power the device goes into sleep mode when the regulator is disabled. an internal thermal protection circuit prevents the device from overheating. also the maximum output current is internally limited. features application ? low noise ? functionally and pin compatible with lp2985 ? can be used w/o c bypass , see p. 5 ? internal thermal shutdown ? short circuit protection ? sot23-5 package ? several output voltage options available, see ordering information p. 8 ? cellular phones ? cordless phones ? accessories ? pagers ? battery powered systems ? portable systems ? radio control systems ? low voltage systems pin configuration and description pin name pin type function vin 1 p power supply voltage gnd 2 g ground ctrl 3 i enable/disable pin for regulator bypass 4 i pin for bypass capacitor vout 5 o output top view g = ground, i = input, o = output, p = power for top marking information see ordering information p. 8 1 2 3 5 vin vout ctrl gnd bypass 24ax 4
2 (8) da9124.003 25 october, 2001 block diagram absolute maximum ratings all voltages with respect to ground parameter symbol conditions min max unit supply voltage v in -0.3 6 v voltage range for all pins -0.3 v in + 0.3 v esd rating hbm 2 kv junction temperature t jmax +175 (limited) c storage temperature t s -55 +150 c stresses beyond those listed may cause permanent damage to the device. the device may not operate under these conditions, but i t will not be destroyed. recommended operating conditions parameter symbol conditions min max unit operating junction temperature t j -40 +125 c operating ambient temperature t a -40 +85 c operating supply voltage v in 2.5 5.3 v ctrl vin vout gnd over current / over temperature protection voltage reference + bypass 160k ?
3 (8) da9124.003 25 october, 2001 electrical characteristics t a = -40 c to +85 c, typical values at t a = +27 c, v in = v out(nom) + 1.0 v (or min 3.8 v), i out = 1.0 ma, c in = 1.0 f, c l = 1.0 f, c bypass = 10 nf, v ctrl = v in , unless otherwise specified thermal protection parameter symbol conditions min typ max unit threshold high t h 145 160 175 c threshold low t l 135 150 165 c the hysteresis of 10 c prevents the device from turning on too soon after thermal shut-down. control terminal specifications parameter symbol conditions min typ max unit control voltage off state on state v ctrl ? 0.3 1.6 0.55 v in + 0.3 v control current i ctrl v ctrl = v in v ctrl = 0 v 5 0 10 a if ctrl-pin is not connected, mas9124 is in off state (900 k ? pull-down resistor to ground). voltage parameters parameter symbol conditions min typ max unit output voltage tolerance v out i out = 0 ma i out = 150 ma v out(nom) ? 0.05 v out(nom) ? 0.10 v out(nom) + 0.05 v out(nom) + 0.05 v dropout voltage v drop i out = 1 ma i out = 50 ma i out = 150 ma mas9124a4 (150 ma) mas9124a5 (150 ma) 1.7 70 200 320 800 1100 mv current parameters parameter symbol conditions min typ max unit continuous output current i out 150 ma short circuit current i max r l = 0 ? 450 675 ma peak output current i pk v out > 95%* v out(nom) 410 ma ground pin current i gnd i out = 0 ma i out = 10 ma i out = 50 ma i out = 150 ma 120 130 160 220 200 400 a ground pin current, sleep mode i gnd v ctrl < 0.3 v 0.01 5 a
4 (8) da9124.003 25 october, 2001 power dissipation parameter symbol conditions min typ max unit junction to case thermal resistance r jc 81.0 c/w junction to ambient thermal resistance r ja 255.9 c/w maximum power dissipation p d any ambient temperature ja a (max) j max d r t t p ? = w note 1 note 1 : t j(max) denotes maximum operating junction temperature (+125 c), t a ambient temperature, and r ja junction-to-air thermal resistance (+255.9 c/w). line and load regulation parameter symbol conditions min typ max unit line regulation v out(nom) + 1 v < v in < 5.3 v, i out = 60 ma 0.7 mv load regulation i out = 1.0 to 50 ma i out = 1.0 to 150 ma 5 10 mv noise and ripple rejection parameter symbol conditions min typ max unit output noise voltage v rms 300hz < f < 50khz c bypass = 10 nf w/o c bypass 20 110 vrms noise density v n i out = 50 ma, f = 1.0 khz 100 nv sqrt(hz) psrr f = 1 khz f = 10 khz f = 100 khz 67 65 48 db dynamic parameters parameter symbol conditions min typ max unit rise time (10% ? 90%) v ctrl = 0 to 2.4 v, i out = 30ma c bypass = 10 nf w/o c bypass 4 16 ms s overshoot v ctrl = 0 to 2.4 v, w/o c bypass 310 % start-up delay v ctrl to v out , w/o c bypass (see figure 1 below) 17 s figure1. definitions of rise time, overshoot and start- up delay trl vout 50% delay rise time 90% 10% overshoot
5 (8) da9124.003 25 october, 2001 application information parameter symbol min max unit note output capacitance effective series resistance c l esr 0.22 0.01 3 f ohm 1. ceramic and film capacitors can be used. 2. the value of c l should be smaller than or equal to the value of c in . 1. when within this range, stable with all i out = 0 ma ? 150 ma values. bypass capacitance (optional: if c bypass is not used, noise performance and psrr decline, but rise time is improved.) c bypass typically 0.01 f 1. ceramic and film capacitors are best suited. for maximum output voltage accuracy dc leakage current through capacitor should be kept as low as possible. in any case dc leakage current must be below 100 na. input capacitance c in 0.5 f 1. a big enough input capacitance is needed to prevent possible impedance interactions between the supply and mas9124. 2. ceramic, tantalum, and film capacitors can be used. if a tantalum capacitor is used, it should be checked that the surge current rating is sufficient for the application. 3. in the case that the inductance between a battery and mas9124 is very small (< 0.1 h) 0.47 f input capacitor is sufficient. 4. the value of c in should not be smaller than the value of c l . values given on the table are minimum requirements unless otherwise specified. when selecting capacitors, tolerance and temperature coefficient must be considered to make sure that the requirement is met in all potential operating conditions. ctrl vin vout over current / over temperature protection voltage reference + c bypass 160k ? c in c l gnd bypass 1 2 3 4 5
6 (8) da9124.003 25 october, 2001 package (sot23_5) outline symbol min max unit a 0.90 1.45 mm a1 0.00 0.15 mm a2 0.90 1.30 mm b 0.25 0.50 mm c 0.09 0.20 mm d 2.80 3.10 mm e 2.60 3.00 mm e1 1.50 1.75 mm l 0.35 0.55 mm e 0.95ref mm e1 1.90ref mm datum ?a? a c l c l c l 0 - 10 degrees 0.20 2 l e1 be c l e e1 d a2 a1 note: 1. all dimensions are in millimeters 2. foot lenght measured at intercept point between datum a & lead surface. 3. package outline exclusive of mold flash & metal burr 4. package outline inclusive of solder plating. 5. comply to eiaj sc74
7 (8) da9124.003 25 october, 2001 soldering information resistance to soldering heat according to rsh test iec 68-2-58/20 2*220 c maximum reflow temperature 235 c maximum number of reflow cycles 2 seating plane co-planarity max 0.08 mm lead finish solder plate 7.62 - 25.4 m, material sn 85% pb 15% tape & reel specifications other dimensions according to eia-481 standard. 3000 components on each reel. dimension min max unit a 178 mm b1.5 mm c 12.80 13.50 mm d 20.2 mm n50 mm w 1 (measured at hub) 8.4 9.9 mm w 2 (measured at hub) 14.4 mm trailer 160 mm leader 390, of which minimum 160 mm of empty carrier tape sealed with cover tape mm feeding direction 8 mm 4 mm a b d w3 w2 c w1 n
8 (8) da9124.003 25 october, 2001 ordering information product code product top marking package comments mas9124ast5-t 1.50 v voltage regulator ic 24a5 sot23-5 tape and reel mas9124ast4-t 1.80 v voltage regulator ic 24a4 sot23-5 tape and reel mas9124asta-t 2.30 v voltage regulator ic 24aa sot23-5 tape and reel MAS9124ASTB-T 2.40 v voltage regulator ic 24ab sot23-5 tape and reel mas9124ast3-t 2.50 v voltage regulator ic 24a3 sot23-5 tape and reel mas9124astc-t 2.60 v voltage regulator ic 24ac sot23-5 tape and reel mas9124ast9-t 2.70 v voltage regulator ic 24a9 sot23-5 tape and reel mas9124ast2-t 2.80 v voltage regulator ic 24a2 sot23-5 tape and reel mas9124ast8-t 2.86 v voltage regulator ic 24a8 sot23-5 tape and reel mas9124ast7-t 2.90 v voltage regulator ic 24a7 sot23-5 tape and reel mas9124ast6-t 3.00 v voltage regulator ic 24a6 sot23-5 tape and reel mas9124astd-t 3.10 v voltage regulator ic 24ad sot23-5 tape and reel mas9124ast1-t 3.30 v voltage regulator ic 24a1 sot23-5 tape and reel for more voltage options contact micro analog systems oy. local distributor micro analog systems oy contacts micro analog systems oy kamreerintie 2, p.o.box 51 fin-02771 espoo, finland http://www.mas-oy.com tel. (09) 80 521 tel. int. +358 9 80 521 telefax +358 9 805 3213 e-mail: info@mas-oy.com notice micro analog systems oy reserves the right to make changes to the products contained in this data sheet in order to improve the design or performance and to supply the best possible products. micro analog systems oy assumes no responsibility for the use of any circ uits shown in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, an d makes no claim that the circuits are free from patent infringement. applications for any devices shown in this data sheet are for illust ration only and micro analog systems oy makes no claim or warranty that such applications will be suitable for the use specified without furthe r testing or modification.
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