unisonic technologies co., ltd l1136 preliminary cmos ic www.unisonic.com.tw 1 of 9 copyright ? 2010 unisonic technologies co., ltd qw-r502-464.a high ripple-rejection low dropout high output current cmos voltage regulator ? description the utc l1136 is an extremely low dropout regulator providing designers with low current dissipatio n, high output voltage accuracy and it is developed based on cmos technology. the internal transistor with low-resistance provides small dropout voltage and the large output current. various capacitors, as well as small ceramic capacitors, can be used for this ic more than for the conventional regulator ics which have cmos technology. the on/off circuit can guarantee longer sure the battery life. the over-current protection circuit is designed to pr otect the device from being damaged because of load current while exceeding the capacitance of output transistor. the thermal sh utdown protection circuit protects against heat and the rush current control protection circui t and limits the excessive rush current during start-up. the utc l1136 is universally suitable for power supply of battery-powered devices, power supply of tv, notebook pcs and home electric appliances, and consta nt-voltage power supply of portable equipment. ? features * output voltage ranges from 1.0 to 5.0v selectable in 0.05v step * input voltage varies from 1.5 to 5.5v * low equivalent series resistance capacitor: ceramic capacitor of 4.7 f or more can be used as the i/o capacitor * high accuracy output voltage: 1.0%(1.0~1.45v output product: 15mv) * low current consumption: during operation: 70 a (typ.), 90 a (max.) (3.0v output product) during shutdown: 0.1 a (typ.), 1.0 a (max.) * low dropout voltage: 70mv (typ.) (3.0v output product, at i out = 200ma) * output current: 500ma (3.0v output product, at v in v out(s) +1.0v) (attention should be paid to the power dissipation of the package when the output current is large.) * high ripple rejection: 70db (typ.) @ 1.0khz, v out =1.0v * internal protection circuits: over-curre nt protection circuit, thermal shutdown circuit and rush current control circuit * internal power on/off circuit ensures longer battery life * special care should be taken to the power consumpt ion of the package when the output current is large. ? ordering information ordering number package packing L1136G-XX-AF5-R sot-25 tape reel note: xx: output voltage, re fer to marking information.
l1136 preliminary cmos ic unisonic technologies co., ltd 2 of 9 www.unisonic.com.tw qw-r502-464.a ? marking information package voltage code marking sot-25 33 :3.3v 321 hxx fg 5 4 voltage code ? pin configuration 3 2 1 4 5 nc v ss on/off v out v in ? pin description pin no. pin name description 1 on/off shutdown pin 2 v ss gnd pin 3 nc (note) no connection 4 v in input voltage pin 5 v out output voltage pin note: the nc pin is electrically open and it can be connected to v in or v ss .
l1136 preliminary cmos ic unisonic technologies co., ltd 3 of 9 www.unisonic.com.tw qw-r502-464.a ? block diagram
l1136 preliminary cmos ic unisonic technologies co., ltd 4 of 9 www.unisonic.com.tw qw-r502-464.a ? absolute maximum rating parameter symbol ratings unit v in v ss -0.3 ~ v ss +6 v input voltage v on/off v ss -0.3 ~ v in +0.3 v output voltage v out v ss -0.3 ~ v in +0.3 v power dissipation p d 1000 mw ambient operating temperature t opr -40 ~ +85 c storage temperature t stg -40 ~ +125 c note: 1. absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? electrical characteristics (t a =25c, unless otherwise specified.) parameter symbol test conditions min typ max unit test circuit 1.0v v out(s) 1.5v v out(s) -0.015 v out(s) v out(s) +0.015 v 1 v in =v out(s) +1.0v, i out =100ma 1.5v v out(s) 4.5v v out(s) 0.99 v out(s) v out(s) 1.01 v 1 output voltage (note 1) v out(e) v in =5.5v, i out =100ma 4.5v v out(s) 5.0v v out(s) 0.99 v out(s) v out(s) 1.01 v 1 v in v out(s) +1.0v 1.0v v out(s) 4.5v 600 (note 5) ma 3 output current (note 2) i out v in =5.5v 4.5v v out(s) 5.0v 600 (note 5) ma 3 1.1v v out(s) 1.2v 0.44 0.48 v 1 1.2v v out(s) 1.3v 0.34 0.38 v 1 1.4v v out(s) 1.5v 0.14 0.18 v 1 1.5v v out(s) 2.6v 0.10 0.15 v 1 dropout voltage (note 3) v drop i out =200ma 2.6v v out(s) 5.0v 0.07 0.10 v 1 v in =v out(s) +1.0v, i out =100ma -40 t a 85c 1.0v v out(s) 4.5v 130 ppm/c 1 output voltage temperature coefficient (note 4) out a out v t v ? v in =5.5v, i out =100ma -40 t a 85c 4.5v v out(s) 5.0v 130 ppm/c 1 note: 1. v out(s) : specified output voltage; v out(e) : actual output voltage the output voltage when fixing i out (=100ma) and inputting v out(s) +1.0v or 5.5v 2. the output current at which the output voltage becomes 95% of v out(e) after gradually increasing the output current 3. v drop = v in1 -(v out3 0.98) v out3 is the output voltage when v in = v out(s) +1.0v or 5.5v, and i out = 200ma. v in1 is the input voltage at which t he output voltage becomes 98% of v out3 after gradually decreasing the input voltage. 4. the change in temperature [mv/c] is calculated using the following equation. 1000 3 2 1 ? = * out a out * ) s ( out * a out ] c / ppm [ v t v ] v [ v ] c / mv [ t v *1. change in temperature of the output voltage *2. specified output voltage *3. output voltage temperature coefficient 5. the output current can be at least this value. due to limitation of the package powe r dissipation, this value may not be satisfied. attention should be paid to the power dissipation of the package when the output current is large. this specification is guaranteed by design.
l1136 preliminary cmos ic unisonic technologies co., ltd 5 of 9 www.unisonic.com.tw qw-r502-464.a ? electrical characteristics (cont.) parameter symbol test conditions min typ max unit test circuit 1.0v v out(s) 3.6v 0.05 0.2 %/v 1 v out(s) +0.5v v in 5.5v,i out =100ma 3.6v v out(s) 4.8v 2.5 10 mv 1 line regulation out in out v v v ? 1 5.3v v in 5.5v, i out =100ma 4.8v v out(s) 5.0v 2.5 10 mv 1 v in =v out(s) +1.0v, 1ma i out 200ma 1.0v v out(s) 4.5v 15 30 mv 1 load regulation v out2 v in =5.5v, 1ma i out 200ma 4.5v v out(s) 5.0v 15 30 mv 1 v in =v out(s) +1.0v, on/off pin=on, no load, 1.0v v out(s) <1.8v 90 110 a 2 v in =v out(s) +1.0v, on/off pin=on, no load, 1.8v v out(s) <4.5v 70 90 a 2 current consumption during operation i ss1 v in =5.5v, on/off pin=on, no load, 4.5v v out(s) <5.0v 70 90 a 2 v in =v out(s) +1.0v, on/off pin= off, no load 1.0v v out(s) 4.5v 0.1 1.0 a 2 current consumption during shutdown i ss2 v in =5.5v, on/off pin= off, no load 4.5v v out(s) 5.0v 0.1 1.0 a 2 input voltage v in 1.5 5.5 v v in =v out(s) +1.0v, r l =1.0k ? , determined by v out output level 1.0v v out(s) 4.5v 1.5 v 4 shutdown pin input voltage ?h? v sh v in =5.5v, r l =1.0 k ? , determined by v out output level 4.5v v out(s) 5.0v 1.5 v 4 v in =v out(s) +1.0v, r l =1.0k ? , determined by v out output level 1.0v v out(s) 4.5v 0.3 v 4 shutdown pin input voltage ?l? v sl v in =5.5v,r l =1.0k ? , determined by v out output level 4.5v v out(s) 5.0v 0.3 v 4 shutdown pin input current ?h? i sh v in =5.5v, v on/off =5.5v -0.1 0.1 a 4 shutdown pin input current ?l? i sl v in =5.5v, v on/off =0v -0.1 0.1 a 4 1.0v v out(s) 1.2v 70 db 5 1.2v v out(s) 3.0v 65 db 5 v in =v out(s) +1.0v, f=1khz, v rip =0.5vrms, i out =100ma 3.0v v out(s) 4.5v 60 db 5 ripple rejection |rr| v in =5.5v,f=1khz, v rip =0.5vrms, i out =100ma 4.5v v out(s) 5.0v 60 db 5 v in =v out(s) +1.0v, on/off pin=on, v out =0v 1.0v v out(s) 4.5v 200 ma 3 short-circuit current i short v in =5.5v, on/off pin=on, v out =0v 4.5v v out(s) 5.0v 200 ma 3 thermal shutdown detection temperature t sd junction temperature 150 c thermal shutdown release temperature t sr junction temperature 120 c
l1136 preliminary cmos ic unisonic technologies co., ltd 6 of 9 www.unisonic.com.tw qw-r502-464.a ? test circuits 1. 2. v ss v out v in on/off set to v in or gnd a + 3. v + a + v ss v out v in on/off set to power on 4. 5.
l1136 preliminary cmos ic unisonic technologies co., ltd 7 of 9 www.unisonic.com.tw qw-r502-464.a ? typical application circuit
l1136 preliminary cmos ic unisonic technologies co., ltd 8 of 9 www.unisonic.com.tw qw-r502-464.a ? functional description 1. basic operation the utc l1136 ?s block diagram is shown in the following. (figure 1) the utc l1136 has an error amplifier, and it co mpares the reference voltage (v ref ) with v fb , which is the output voltage resistance-divided by feedback resistors r s and r f . it supplies the gate voltage necessary to maintain the constant output voltage which is not influenced by t he input voltage and temperat ure change, to the output transistor. 2. output transistor for l1136 , the output transistor is a p-channel mosfet with low on-resistance. in order to protect against inverse current, make sure that v out does not exceed v in +0.3v, because of a parasitic diode between the v in and v out pin, when the potential of v out became higher than v in . 3. shutdown pin (on/off pin) the shutdown pin is used to turn on and turn off this regulator. when the on/off pin is set to the shut down level, the entire internal circ uit stops operating. for reducing the current dissipation, the internal p-channel mos fet is shut down. the v out pin is set to the v ss level by the internal dividing resistor of several hundred k ? between the v out and vss pin. note: when the on/off pin voltage is in the range of 0.3v~1.0v, the current dissipation increases. the architecture of the on/off pin can be seen in figure 2. since the on/off pin is neither pulled down nor pulled up internally, do not use it in the floating state. on/off pin internal circuits v out pin voltage current consumption l?: power off stop v ss level i ss2 h?: power on operate set value i ss1
l1136 preliminary cmos ic unisonic technologies co., ltd 9 of 9 www.unisonic.com.tw qw-r502-464.a ? functional description (cont.) 4. over-current protection circuit an over-current protection circ uit is contained in the utc l1136 . it aims at preventing the output transistor from damage due to an excessive output current and short circuiting between the v out and v ss pin. the current (i short ) is internally-fixed to about typically 200ma when short-circuit condition is applied in output pin, and the initial value is restored for the output voltage, if releasing a short circuit once. caution : this over-current protection circuit does not work as for thermal protection. if this ic maintains short circuiting for a long time inside, take care to the co nditions of input voltage and the load current, therefore, under the usage conditions including short circuit, the ic?s consumption will not exceed power dissipation of the package. 5. thermal shutdown circuit a thermal shutdown circuit is included to prevent this device from being damaged for overheat. the thermal shutdown circuit operates to stop r egulating when the junction temperatur e becomes higher than 150c (typ.), and it turns back to normal operation when the junction temperature is lower than 120c (typ.). due to self-heating of the utc l1136 , if the thermal shutdown circuit starts operating, it stops regulating so that the output voltage drops. when the regula ting operation stops, the ic?s temper ature goes down due to the utc l1136 does not generate heat itself. when t he temperature drops, the t hermal shutdown circuit is released to restart regulating, thus this ic generates heat again. repeat ing this procedure makes waveform of the output voltage pulse-like form. stop/restart of regu lation continues unless decreasing eit her/both of the input voltage and the output voltage for reducing the internal current cons umption, or decreasing t he ambient temperature. thermal shutdown circuit (note) v out pin voltage operation: 150c (typ.) v ss level release: 120c (typ.) set value note: junction temperature 6. rush current control circuit the rush current control circuit is designed to protect against the rush current occurs during power-on or when the on/off pin is on. the rush current is specified to typically 400ma immediately after power-on or from the on/off pin is on until the specified time (100 s min.) which is set internally. caution : due to the thermal shutdown protection circuit, t he junction temperature drops to 120c (typ.), after stopping regulation, the circuit is released to restart r egulation; in this case, pay attention to the period which is to limit rush current to be shorter (10 s min.). utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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