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CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 1 general description features the CM2832 family is a positive voltage linear regulator developed utilizing cmos technology featured low quiescent current (30a typ.), low dropout voltage, and high output voltage accuracy, making them ideal for battery applications. en input connected to cmos has low bias current. the space-saving sot-23-5 package is attractive for ?pocket? and ?hand held? applications. these rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the ?worst? of operating conditions. in application requiring a low noise, regulated supply, place a 1000pf capacitor between bypass and ground. the CM2832 is stable with an output capacitance of 2.2f or greater. very low dropout voltage low current consumption: typ. 30a, max. 35a output voltage: 1.5v, 1.8v, 1.9v, 2.2v, 2.5v, 2.7v, 2.8v, 3.0v, 3.3v, 3.5v, 3.6v, and 3.8v high accuracy output voltage: +/- 1.5% guaranteed 300ma output input range of 2.6v to 7.0v thermal shutdown current limiting compact package: sot-23-5 factory pre-set output voltages short circuit current fold-back low temperature coefficient applications battery-powered devices personal communication devices home electric/electronic appliances pc peripherals 24 hours technical support--websim champion provides customers an online circuit simulation tool called websim. you could simply logon our website at www.champion-micro.com for details. typical applications in out CM2832 byp gnd en in out 5v c1 1uf c3 2.2uf c2 1nf
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 2 pin configuration sot-23-5 top view 1 5 3 en byp vin 2 4 vout gnd block diagram overcurrent shutdown thermal shutdown r1 r2 in out gnd vref = 1.176v amp - + byp en 1ua
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 3 ordering information part number output voltage temperature range package CM2832aim25 1.5v -40 ~ +85 sot-23-5 CM2832dim25 1.8v -40 ~ +85 sot-23-5 CM2832eim25 1.9v -40 ~ +85 sot-23-5 CM2832him25 2.2v -40 ~ +85 sot-23-5 CM2832kim25 2.5v -40 ~ +85 sot-23-5 CM2832mim25 2.7v -40 ~ +85 sot-23-5 CM2832nim25 2.8v -40 ~ +85 sot-23-5 CM2832pim25 3.0v -40 ~ +85 sot-23-5 CM2832sim25 3.3v -40 ~ +85 sot-23-5 CM2832uim25 3.5v -40 ~ +85 sot-23-5 CM2832vim25 3.6v -40 ~ +85 sot-23-5 CM2832xim25 3.8v -40 ~ +85 sot-23-5 note: for other pre-set output voltage requirements, please contact champion sales office. absolute maximum ratings operating ratings input voltage ?????.???????????. +7v output current ????????.?? p d / (v in - vo) ma output voltage ???????? gnd-0.3v to v in +0.3v esd classification ???????????????? b ambient temperature range (t a ) ??... -40 to +85 junction temperature range ?..?... -40 to +125 thermal information parameter maximum unit thermal resistance ( jc ) sot-23-5 260 /w internal power dissipation (p d ) ( t = 100 ) sot-23-5 380 /w maximum junction temperature 150 maximum lead temperature (10 sec) 300 caution: stress above the listed absolute rating may cause permanent damage to the device.
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 4 electrical characteristics t a = +25 ; unless otherwise noted CM2832 parameter symbol test conditions min. typ. max. unit input voltage v in note 1 7 v output voltage accuracy v out i o = 1ma to 300ma -1.5 1.5 % i o = 300ma, v out =v o(nom) -2%, v out >=2.5v 300 dropout voltage v dropout i o = 300ma, v out =v o(nom) -2%, v out <2.5v 800 mv output current i o v out > 1.2v 300 ma current limit i lim v out > 1.2v 300 450 ma short circuit current i sc v out < 0.95v 150 300 ma quiescent current i q i o = 0ma 30 35 a ground pin current i gnd i o = 1ma to 300ma 30 50 a v out <= 3.0v -0.15 0.03 0.15 % line regulation reg line i out =5ma, v in =v out +1 to v out +2 v out > 3.0v -0.3 0.06 0.3 % load regulation reg load i o =1ma to 300ma 0.2 1 % over temperature shutdown ots 150 over temperature hysteresis oth 30 v out temperature coefficient tc 25 ppm/ f=1khz 60 f=10khz 50 power supply rejection psrr i o = 100ma c o =2.2f ceramic f=100khz 40 db f=1khz 75 f=10khz 55 power supply rejection psrr i o = 100ma c o =2.2f ceramic c byp =0.01f f=100khz 30 db c o =2.2f 30 output voltage noise en f=10hz to 100khz i o = 10ma, c byp =0f c o =100f 20 vrms c o =2.2f 30 output voltage noise en f=10hz to 100khz i o = 10ma, c byp =0.01f c o =100f 20 vrms shutdown supply current i sd v in =5.0v, v out =0v, v en < v el 2.0 3.0 a i eh v en =v in , v in =2.6v to 7v 0.1 a en input bias current i el v en =v in , v in =2.6v to 7v 1.0 3.0 a v eh v in =2.6v to 7v v in /2+0.8v v in v en input threshold v el v in =2.6v to 7v 0 v in /2-0.8v v note 1. v in(min) = v out + v dropout
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 5 detailed description the CM2832 family of cmos regulators contain a pmos pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown, and short circuit protection. the p-channel pass transistor receives data from the error amplifier, over-current shutdown, short output protection, and therm al protection circuits. during normal operation, the error amplifier compares the output voltage to a precision reference. over-cu rrent and thermal shutdown circuits become active when the junction temperature exceeds 150 , or the current exceeds 300ma. during thermal shutdown, the output voltage remains low. normal operation is restored when the junction temperature drops below 120 . the CM2832 switches from voltage mode to current mode when the load exceeds the rated output current. this prevents over-stress. the CM2832 also incorporates current fold-back to reduce power dissipation when the output is short-circuited. thi s feature becomes active when the output drops below 1.05v, and reduces the current flow by 65%. full current is restored when the voltage exceeds 0.95v. enable the enable pin normally floats high. when actively, pulled low, the pmos pass transistor shut off, and all internal circuits ar e powered down. in this state, the quiescent current is less than 2a. this pin behaves much like an electronic switch. external capacitor the CM2832 is stable with an output capacitor to ground of 2.2f or greater. it can keep stable even with higher or poor esr capacitors. a second capacitor is recommended between the input and ground to stabilize vin. the input capacitor should be larger than 0.1f to have a beneficial effect. all capacitors should be placed in close proximity to the pins. a ?quiet? ground termination is desirable.
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 6 typical electrical characteristics
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 7
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 8
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 9 package dimension sot-23-5 (m25) e1 l c1 d e a a2 a1 b b1 c 2 1 e1 e l1 d e e1 e e1 b a2 a 2 1 a1 b1 b c c1 base metal with plating section b-b see section b-b l1 l 123 5 4
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 10 numbering scheme ordering number : CM2832 xyz (note1) note1 : CM2832 : 300ma cmos ldo with enable x : suffix for voltage output (note 2) y : suffix for temperature range (note 3) z : suffix for package type (note 4) note 2 : see cmos ldo voltage suffix table CM2832 will provide options of a(1.5v), d (1.8v), e(1.9v),, h(2.2v), k(2.5v), m(2.7v), n(2.8v), p(3.0v), s(3.3v), u(3.5v), v(3.6v), x(3.8v) note 3 : y= i : -40 ~+85 (only i grade support for all cmos ldos) note 4: z is single alphabet with or without digits m25 : sot-25 (tr only) cmos ldo voltage suffix table output voltage suffix output voltage suffix 1.5v a 3.0v p 1.6v b 3.1v q 1.7v c 3.2v r 1.8v d 3.3v s 1.9v e 3.4v t 2.0v f 3.5v u 2.1v g 3.6v v 2.2v h 3.7v w 2.3v i 3.8v x 2.4v j 3.9v y 2.5v k 4.0v z 2.6v l 2.7v m 2.8v n 2.9v o
CM2832 300ma cmos ldo w ith e nable 2002/04/12 rev. 3 champion microelectronic corporation page 11 important notice champion microelectronic corporation (cmc) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to ve rify, before placing orders, that the information being relied on is current. a few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. cmc integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. use of cmc products in such applications is understood to be fully at the risk of the customer. in order to minimize risks associated with the customer?s applications, th e customer should provide adequate design and operating safeguards. hsinchu headquarter sales & marketing 5f, no. 11, park avenue ii, science-based industrial park, hsinchu city, taiwan 11f, no. 306-3, sec. 1, ta tung road, hsichih, taipei hsien 221, taiwan t e l : +886-3-567 9979 t e l : +886-2-8692 1591 f a x : +886-3-567 9909 f a x : +886-2-8692 1596

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