lr9193 300ma ultra - low noise, ultra - fast cmos ldo regulator features ? ultra - low noi se for rf application ? ultra - fast respose in line/load transient ? quick start - up (typically 50 ? s) ? <0.01 ? a standby current when shutdown. ? low dropout:220mv@300ma ? wide operating voltage ranges:2.5v to 5.5v ? ttl - logic - controlled shutdown input ? low temperature coefficient ? current limiting protection ? thermal shutdown protection ? only 1 ? f output capacitor required for stability ? high power supply rejection ratio ? custom voltage available ? fast output discharge ? available in 5 - lead sot - 23 and sc - 70 package applications ? cellular and smart phones ? battery - powered equipment ? laptop, palmtops,notebook computers ? hand - held instruments ? pcmcia cards ? mp3 players ? portable information appliances description the lr 9193 is designed for portable rf and wireles s applications with demanding performance and space requirements. t he lr 9193 performance is optimized for battery - powered systems to deliver ultra low noise and low quiescent current. a noise bypass pin is available for further reduction of output noise. r egulator ground current increases only slightly in dropout, further pro longing the battery life. the lr 9193 also works with low - esr ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand - he ld wireless devi ces. the lr 9193 consume s less than 0.01 a in shutdown mode and has fast turn - on time less than 50 s. the other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. available in the 5 - lead of sc - 70,sot - 23 , packages . ordering information lr 9193- xx xx typical application lr9193 vin 1 gnd 2 en 3 bp 4 vout 5 c1 1uf c2 1uf c3 22nf r1 100k 0 0 0 0 0 3.3v-5.5v chip enable 2.8v package: rn:sot - 23 - 5 urn:sc - 70 - 5 output voltage: 12:1.2v 15:1.5v 18:1.8v 28:2.8v 33: : 3.3v ct: custom fixed output(50mv step) ad:adjustable leshan radio company, ltd. 1/9
absolute maximum rating (note 1) input supply voltage (v cc ) - 0.3v to + 6 v en input voltage - 0.3v to +v in o utput voltage - 0.3v to vin+0.3 v bp voltage - 0.3v to + 6 v output current 300ma maximum junction temperature 125c operating temperature range (note2) - 40c to 85c storage temperatu re range - 65c to 125c lead temperature (soldering, 10s) 300c package information thermal resistance (note 4 ) : package ? ? note 1: absolute maximum ratings are those values beyond which the life of a device may be impaired. note 2: the lr9193 is guaranteed to meet performance specifications from 0c to 70c. specifications over the ? 40c to 8 5c operating temperature range are assured by design, characterization and correlation with statistical process controls. note 3: x:product cod e v:voltage code y:year m:month. note 4 : thermal resistance is specified with approximately 1 square of 1 oz cop per. 1 2 3 5 4 sot 23 - 5 vin gnd en vout bp m a r k i n g part number top mark temp range lr 9193 - 1.2 x v y m (note 3) - 40c to +85c lr9193 - 2.8 x v y m - 40c to +85c leshan radio company, ltd. 2/9
pin description pin name function 3 en chip enable(active high). note that this pin is high impedance. there should be a pull low 100 k lr9193- x.x a lr9193- x.x c lr9193- x.x b lr9193- x.x d leshan radio company, ltd. 3/9
electrical characteristics (note 5 ) (v in =3.6v , en=v in , c in =c out =1uf , c bp = 22 nf ,t a =2 5 ,unless otherwise noted.) parameter symbol conditions min typ max unit input voltage v in 2.5 5.5 v - 1 +1 output voltage accuracy (note 6 ) ' v out v in= 3.6v, i out =1ma - 2 +2 % current limit i lim r load =1 : 400 4 3 0 ma quiescent current i q v en >1.2v, i out =0ma 9 0 1 30 ua i out =200ma, v out =2.8v 1 3 0 18 0 dropout voltage v drop i out =300ma, v out =2.8v 210 300 mv line regulation note 5 : 100% production test at +25c. specifications over the temperature range are guaranteed by design and characterization. note 6 : this ic includes two kinds of output voltage accuracy versions.a : 1%,b: 2%. leshan radio company, ltd. 4/9
typical performance characteristics 0 50 100 150 200 250 300 0 50 100 150 200 250 300 d r o p o u t v o l t a g e ( m v ) load current(ma) dropout voltage vs. load current c in =c out =1uf t a =25 q c 10 100 1000 10000 100000 1000000 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 p s r r ( d b ) frequency(hz) i out =100ma i out =200ma psrr v in =4v to 5v c in =c out =1uf,x7r leshan radio company, ltd. 5/9
typical performance characteristi cs applications information like any low - dropout regulator, the exte rnal capacitors used with the lr 9193 must be carefully selected for regulator stability and performance. using a capacitor who se value is > 1 f on the lr 9193 input and the amount of capacitance can be increased without limit. the input capacitor must be located a distance of not more than 0.5 inch from the input pin of the ic and returned to a clean analog ground. any good qualit y ceramic or tantalum can be used for this capacitor. the capacitor with larger value and lower esr (equivalent series resistance) provides better psrr and line - transient response. the output capacitor must meet both requirements for minimum amount of capa citance and esr in all ldos applicat ion. the lr 9193 is designed specifically to work with low esr ceramic output capacitor in space - saving and performance conside ration. using a ceramic capacitor whose value is at least 1 f with esr is > 25m
on the lr 9193 output ensures stability. the lr 9193 still works well with output capacitor of other types d ue to the wide stable esr range . output capacitor of larger capaci tance can reduce noise and improve load transient response, stability, and psrr. the output capacitor should be located not more than 0.5 inch from the v out pin of the lr 9193 and returned to a clean analog ground. bypass capacitor and low noise connec ting a 22nf between the bp pin and gnd pin significantly reduces noise on the regulator output, it is critical that the capacitor connection between the bp pin and gnd pin be direct and pcb traces should be as short as possible. there is a relationship bet ween the bypass capacitor value and the ldo regulator turn on time. dc leakage on this pin can affect the ldo regulator output noise and voltage regulation performance. enable function the lr 9193 features an ldo regulator enable/disable function. to ass ure the ldo regulator will switch on, the en turn on control level must be greater than 1.2 volts. the ldo regulator will go into the shutdown mode when the voltage on the en pin falls below 0.4 volts. for to protect the system, the lr 9193 have a quick leshan radio company, ltd. 6/9
dis charge function. if the enable function is not needed in a specific application, it may be tied to vin to keep the ldo regulator in a continuously on state. thermal considerations thermal protectio n limits power dissipation in lr 9193. when the operation junction temperature exceeds 165c, the otp circuit starts the thermal shutdown function turn the pass element off. the pass element turn on again after the junction temperature cools by 30c. for continue operation, do not exceed absolute maximum operation junction temperature 125c. the power dissipation definition in device is : p d = (v in v out ) x i out + v in x i q the maximum power dissipation depends on the thermal resistance of ic package , pcb layout, the rate of surroundings airflow and temperature difference between junction to ambient. the maximum power dissipation can be calculated by following formula : p d (max) = ( t j (max) ? r e s i s t a n c e ( r e s i s t a n c e leshan radio company, ltd. 7/9 ) / (max) (max) (max)
package description leshan radio company, ltd. sc70-5 8/9
leshan radio company, ltd. sot23-5 9/9
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