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key features applications output accuracy: 2% low dropout voltage: 180mv@150ma high psrr: 70db@100hz low noise output current limiting short circuit protection thermal shutdown space saving package sot23-6 cellular phone portable electronics, pda wireless devices, wireless lan computer peripherals camera module gps receiver general description the dual ldo PAM3102 series of positive voltage linear regulators feature high output voltage accuracy, low quiescent current and low dropout voltage, making them ideal for battery powered applications. the line transient response and load transient response are excellent. space-saving sot23-6 package for 2-ch ldos is attractive for portable and handheld applications. they have both thermal shutdown and a current limit feature to prevent device failure under extreme operating conditions. they are stable with an output capacitance of 2.2 f or greater. pb-free package their high psrr make them useful in applications where ac noise on the input power supply must be suppressed. block diagram current limit thermal protection current limit v ref v ref - + - + - + - + bias vout2 gnd c2 e vin vout1 c1 e 1 www.poweranalog.com typical application PAM3102 dual 150ma high psrr low-dropout cmos regulator out2 in out1 2.2 f co c 2.2 f in 2.2 f co PAM3102 vin vout1 gnd vout2 ce ce 2 1 2 1 3 5 6 4 09/2008 rev 1.1 , power analog microelectronics inc
pin configuration & marking information top view sot23-6 654 123 abvyw 2 absolute maximum ratings these are stress ratings only and functional operation is not implied exposure to absolute maximum ratings for prolonged time periods may affect device reliability all voltages are with respect to ground . . . input voltage...............................................6.6v output current..................................150/150ma output pin voltage gnd-0.3v to v +0.3v lead soldering temperature 5sec ...........300 () in ............. storage temperature..................-40 to 125 esd rating(hbm)........................................2kv oo o cc c recommended operating conditions supply input voltage.................................... 5.5v junction temperature..................-40 to 125 max. supply voltage (for max. duration of 30 minutes)................................................6.4v enable input voltage...............................0v to v cc ambient temperature....................-40 c to 85 c in oo oo thermal information parameter symbol package maximum unit thermal resistance (junction to case) jc sot-23-6 130 thermal resistance (junction to ambient) ja sot-23-6 250 c/w internal power dissipation p d sot-23-6 400 mw pin n umber name function 1 ce1 output 1 enable 2 vin input 3 ce2 output 2 enable 4 vout2 output 2 5 gnd ground 6 vout1 output 1 PAM3102 dual 150ma high psrr low-dropout cmos regulator ab: product code of PAM3102 v: voltage code y: year w: week 09/2008 rev 1.1 , power analog microelectronics inc www.poweranalog.com
electrical characteristic v =v =v =v +1v, t =25 c, c =2.2 f, c =2.2 f, unless otherwise noted. ce1 ce2 in o a in o o ? 3 PAM3102 dual 150ma high psrr low-dropout cmos regulator 09/2008 rev 1.1 parameter symbol test conditions min typ max units input voltage v in note 1 5.5 v output voltage accuracy vo io=1ma -2.0 2.0 % vo=1.8v, io=150ma 950 mv vo=2.5v, io=150ma 350 mv dropout voltage vdrop vo=2.8v, io=150ma 180 mv output current i o 150 note 2 ma current limit i lim vo 1.2v 200 ma quiescent current i q io=0ma 175 250 a ground pin current ignd io=1ma to 150ma 200 250 a shutdown current i sd v ce1 =v ce2 =0v 0.1 1 a short circuit current isc vo=0v 150 ma io=50ma v in =3.0v to 4.0v vo=1.8v io=50ma, v in =3.5v to 4.5v vo=2.5v line regulation lnr io=50ma, v in =3.8v to 4.8v vo=2.8v -0.15 0.1 0.15 %/v load regulation ldr v in =3.3v io=1ma to 150ma -2 1.0 2 % f=100hz 70 db f=1khz 63 db power supply ripple rejection psrr io=50ma,vo=1.8v f=10khz 45 db output noise vn f=10hz to 100khz 35 vrms ce input high threshold v th 1.5 v ce input low threshold v tl 0.3 v ce pull-up resistance r ce 1.7 5 15 m temperature coefficient tc 40 ppm/ o c over temperature shutdown ots io=1ma 155 o c over temperature hysteresis oth io=1ma 40 o c note1: the minimum input voltage ( ) of the PAM3102 is determined by output voltage and dropout voltage. : v=v+v note 2: output current is limited by p , maximum i =p /( -v ). v the minimum input voltage is defined as v in(min) in(max) in(min) o drop dodo , power analog microelectronics inc www.poweranalog.com
typical performance characteristics t =25 c, c =2.2 f, c =2.2 f, unless otherwise noted. ain o o ? 4 1. output voltage vs input voltage vo=1.8v vo=2.5v vo=2.8v vo=1.8v vo=2.5v vo=2.8v 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 23456 input voltage(v) output voltage(v) io=50ma io=1m a io=150ma 0 0.5 1 1.5 2 2.5 3 23456 input voltage(v) output voltage (v) io=50ma io=1m a io=150ma 0 0.5 1 1.5 2 2.5 3 23456 input voltage(v) output voltage(v) io=50ma io=1m a io=150ma 1.794 1.795 1.796 1.797 1.798 1.799 1.8 1.801 1.802 1.803 1.804 2.533.544.555.56 input voltage(v) output voltage(v) io=50ma,t a =25 io=50ma,t a =85 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.533.544.555.56 input voltage(v) output voltage(v) io=50ma,t a =25 io=50ma,t a =85 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.5 3 3.5 4 4.5 5 5.5 6 input voltage(v) output voltage(v) io=50ma,t a =25 io=50ma,t a =85 PAM3102 dual 150ma high psrr low-dropout cmos regulator 09/2008 rev 1.1 , power analog microelectronics inc www.poweranalog.com
5 2. output voltage vs output current 3. output voltage vs temperature vo=1.8v vo=1.8v vo=2.5v vo=2.8v vo=2.8v vo=2.5v 1.78 1.785 1.79 1.795 1.8 1.805 1.81 0 50 100 150 output current(ma) output voltage(v) v in =2.8v v in =3.3v v in ==5.0v 2.44 2.45 2.46 2.47 2.48 2.49 2.5 2.51 0 50 100 150 output current(ma) output voltage(v) v in =2.8v v in =5.0v v in =3.3v 2.775 2.78 2.785 2.79 2.795 2.8 2.805 2.81 2.815 0 50 100 150 output current(ma) output voltage(v) v in =5.0v v in =3.3v v in =2.8v 1.79 1.792 1.794 1.796 1.798 1.8 1.802 1.804 1.806 1.808 1.81 25 45 65 85 105 125 temperature output voltage(v) v in =3.3v,io=30ma v in =3.3v,io=150ma 2.48 2.485 2.49 2.495 2.5 2.505 2.51 25 45 65 85 105 125 temperature output voltage(v) v in =3.3v,io=30ma v in =3.3v,io=150ma 2.74 2.75 2.76 2.77 2.78 2.79 2.8 2.81 25 45 65 85 105 125 temperature output voltage(v) v in =3.3v,io=30ma v in =3.3v,io=150ma PAM3102 dual 150ma high psrr low-dropout cmos regulator typical performance characteristics (continued) 09/2008 rev 1.1 , power analog microelectronics inc www.poweranalog.com
6 4. ground current vs input voltage 6. quiescent current vs input voltage 7. quiescent current vs temperature 8. dropout voltage vs output current 9. dropout voltage vs temperature 5. ground current vs output current 0 50 100 150 200 250 300 23456 input voltage(v) ground current(ua) io=300ma note 1 io=2ma io=100ma 0 50 100 150 200 250 23456 input voltage(v) quiescent current(ua) t a =85 ,io=0ma t a =25 ,io=0ma 0 50 100 150 200 250 300 0 50 100 150 200 250 300 output current(ma) ground current(ua) v in =3.3v v in =4v v in =5v 100 120 140 160 180 200 220 240 260 25 45 65 85 105 125 temperature quiescent current(ua) v in =5v v in =3.3v 0 100 200 300 400 500 600 700 800 900 1000 25 45 65 85 105 125 temperature dropout voltage(mv) vo=1.8v vo=2.5v vo=2.8v 0 100 200 300 400 500 600 700 800 900 1000 0 30 60 90 120 150 output current (ma) dropout voltage(mv) vo=1.8v vo=2.8v vo=2.5v PAM3102 dual 150ma high psrr low-dropout cmos regulator typical performance characteristics (continued) note 1: 2 channels total output current 09/2008 rev 1.1 io=150ma , power analog microelectronics inc www.poweranalog.com
10. power supply ripple rejection 7 11. load transient response vo ac coupling io dc coupling vo ac coupling io dc coupling v =4.0v, v =2.8v in o o , i =50ma to 150ma vo ac coupling io dc coupling v =4.0v, v =2.8v, i =1ma to 150ma in o o -100 +0 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b 10 100k 20 50 100 200 500 1k 2k 5k 10k 20k 50k hz io=50ma io=150ma io=1ma -100 +0 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b 10 100k 20 50 100 200 500 1k 2k 5k 10k 20k 50k hz io=50ma io=150ma io=1ma -100 +0 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b 10 100k 20 50 100 200 500 1k 2k 5k 10k 20k 50k hz t io=50ma io=150ma io=1ma v =4.0v, v =2.8v, in o o i =1ma to 50ma PAM3102 dual 150ma high psrr low-dropout cmos regulator typical performance characteristics (continued) 09/2008 rev 1.1 v =1.8v, o v =3.3v vpp=1v in , v =2.5v, o v =3.3v vpp=1v in , v =2.8v, o v =3.3v vpp=1v in , , power analog microelectronics inc www.poweranalog.com
8 PAM3102 dual 150ma high psrr low-dropout cmos regulator typical performance characteristics (continued) 09/2008 rev 1.1 12. line transient response v dc coupling in v ac coupling o vo=2.5v, =3v to 5v, io=1ma v in 13. turn-on response v =0to5v in v in dc coupling v dc coupling o , power analog microelectronics inc www.poweranalog.com
application information 9 capacitor selection and regulator stability shutdown input operation input-output ( dropout ) voltage current limit and short circuit protection thermal considerations similar to any low dropout regulator, the external capacitors used with the PAM3102 must be carefully selected for regulator stability and performance. please note that the distance between c and the input pin of the PAM3102 should not exceed 0.5 inch. ceramic capacitors are suitable for the PAM3102. capacitors with larger values and lower esr (equivalent series resistance) provide better psrr and line-transient response. the PAM3102 is designed specifically to work with low esr ceramic output capacitors in order to save space and improve performance. using an output ceramic capacitor whose value is > the PAM3102 is shutdown by pulling the ce input low, and turned on by tying the ce input to vin or leaving the ce input floating. a regulator's minimum input-output voltage differential (or dropout voltage) determines the lowest usable supply voltage. the PAM3102 has a typical 180mv dropout voltage. in battery- powered systems, this will determine the useful end-of-life battery voltage. the PAM3102 features a current limit, which monitors and controls the gate voltage of the pass transistor. the output current can be limited to 300ma by regulating the gate voltage. the PAM3102 also has a built-in short circuit current limit. thermal protection limits power dissipation in the PAM3102. when the junction temperature exceeds 150c, the otp (over temperature protection) starts the thermal shutdown and turns the pass transistor off. the pass transistor resumes operation after the junction temperature drops below 120c. for continuous operation, the junction temperature should be maintained below 125c. the power dissipation is defined as: p = (v -v )*i +vin*ignd the maximum power dissipation depends on the thermal resistance of ic package, pcb layout, the rate of surrounding airflow and temperature difference between junction and ambient. the maximum power dissipation can be calculated by the following formula: where t is the maximum allowable junction temperature 125c,t is the ambient temperature and is the thermal resistance from the junction to the ambient. for example, as is 250c/w for the sot-23 package based on the standard jedec 51-3 for a single-layer thermal test board, the maximum power dissipation at ta =25c can be calculated by following formula: p =(125c-25c)/250=0.4w sot-23 it is also useful to calculate the junction temperature of the PAM3102 under a set of specific conditions. suppose the input voltage v =3.3v, the output current i =300ma and the case temperature t =40c measured by a thermalcouple during operation, the our power dissipation is defined as: p =(3.3v-2.8v)*150ma+(3.3v-1.8v) *150ma+3.3v*200 a 300mw and the junction temperature t can be calculated as follows: t=t t = 40c+0.3w*250c/w =40c+75c =115cPAM3102 in this configuration. in din j(max) a ja d(max) in o a d j ja a j j(max) j 2.2f with esr>5m ensures stability. p = (t -t )/ +p * d(max) j(max) a ja ja dj a capacitor c of more than 1f can be employed in the input pin, while there is no upper limit for the capacitance of c . in in oo PAM3102 dual 150ma high psrr low-dropout cmos regulator 09/2008 rev 1.1 , power analog microelectronics inc www.poweranalog.com
ordering information 10 part number output voltage marking package type standard package PAM3102-ast26r1 vout1 1.8v vout2 2.8v abayw sot-23-6 3,000units/tape&reel PAM3102-bst26r1 vout1 1.8v vout2 2.5v abbyw sot-23-6 3,000units/tape&reel PAM3102-x xxxx xx package type voltage version standard package PAM3102 dual 150ma high psrr low-dropout cmos regulator 09/2008 rev 1.1 , power analog microelectronics inc www.poweranalog.com
outline dimension sot23-6 11 PAM3102 dual 150ma high psrr low-dropout cmos regulator 09/2008 rev 1.1 , power analog microelectronics inc www.poweranalog.com symbol a a1 a2 b c d e spec 1.200.25 0.100.05 1.100.2 0.400.1 0.150.07 2.900.1 2.800.2 symbol e1 e e 1 l l1 spec 1.600.1 0.95bsc 1.90bsc 0.550.25 0.60ref 44 gauge plane seating plane gauge plane seating plane view b view b l1 l 0.25 with planting with planting base metal base metal a1 a2 a section a-a section a-a c b see views see views a a e1 e e e1 d unit: millimeter

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