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- 1 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator the IP1531 is a triple output voltage ldo regulator which can provide up to 500ma of output current. the IP1531 consists of 1 - fi xed 3.3v and 2 - adjustable regulators. - 1 - fixed 3.3v ldo regulator with internal npn tr. - 2 - adjustable ldo regulators with internal npn tr. - built - in tsd circ uit. - built - in current limit circuit. - built - in over voltage protection circuit. - output trimmed to +/ - 3% tolerance d escription f eatures device package operating temp IP1531 14soph - 8l - 35 o c ~ +85 o c ordering information 14soph - 8l block diagram vout1 vin on/off vout2 pgnd adj2 1 2 6 4 5 3 vout3 7 pgnd vref tsd ovp ocl adj3 on/off control sw shutdown
- 2 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator pin descriptions no symbol i/o description 1 vin i input supply voltage 2 on/off i on/off control 3 vout1 o regulator 1 output (3.3v fixed) 4 adj2 i regulator 2 adjustable pin 5 vout2 o regulator 2 output (adjustable) 6 vout3 o regulator 3 output (adjustable) 7 adj3 i regulator 3 adjustable pin 8 pgnd - power ground pin connections vout1 vin on/off vout2 pgnd adj2 vout3 pgnd adj3 1 2 6 4 5 3 7 IP1531
- 3 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator characteristics symbol value unit maximum supply voltage vccmax 10 v input voltage vinmax 10 v power dissipation pd 3.0* w operating temperature topr - 35 ~ +85 o c storage temperature tstr - 55 ~ +150 o c note> 1. when mounted on 100mm x 100mm x 1mm pcb (phenolic resin material). 2. power dissipation reduces 24mw/ o c for using ab ove ta=25 o c 3. do not exceed pd and soa. power dissipation curve power dissipation (w) ambient temperature ( c ) 25 50 75 100 125 150 175 0 1 2 3 recommended operating conditions characteristics symbol value unit input voltage vin 4.5 ~ 6.0 v soa absolute maximum ratings(ta=25 o c) 4
- 4 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator electrical characteristics characteristics symbol condition min. typ. max. units quiescent current icc vcc=5v, no - load - 7 12 ma ovp detecting voltage vovp vcc=variable 6.5 - - v ldo regulator 1 (3.3v fixed type) output voltage vout1 io=10ma 3.2 3.3 3.4 v line regulation dvline1 vin=4.5~6v, io=10ma - 0.01 0.2 % load regulation dvload 1 ta=25 o c vin=5v, 10ma < io < 500ma - 0.4 0.8 % dropout voltage vdrop1 io=500ma - 1.1 1.3 v ripple rejection rr1 f=120hz, co=10uf tantalum vin - vout=2v, io=250ma 60 70 - db current limit *note ilimit1 - 500 - - ma temperature stability temp1 - - 0.5 - % ldo regulator 2 (adjustable type) output voltage vout2 io=10ma vref - vin - 1.5v v line regulation dvline2 vin=4.5~6v, io=10ma - 0.01 0.4 % load regulation dvload2 ta=25 o c vin=5v, 10ma < io < 400ma - 0.4 0.8 % dropout voltage vdrop2 io=400ma - 1.1 1.3 v ripple rejection rr2 f=120hz, co=10uf tantalum vin - vout=2v, io=200ma 60 70 - db current limit *note ilimit2 vin - vout=3.0v 400 - - ma temperature stability temp2 - - 0.5 - % reference voltage vref - 1.212 1.25 1.288 v adjust pin current iadj 2 - - 0.1 - ua minimum load current ilmin2 - 10 - - ma ( vin= 5v, co=10uf, ta = 25 o c, unless otherwise specified.)
- 5 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator electrical characteristics ( vin= 5v, co=10uf, ta = 25 o c, unless otherwise specified.) parameter symbol condition min. typ. max. units ldo regulator 3 (adjustable type) output voltage vout3 io=10ma vref - vin - 1.5v v line regulation dvline3 vin=4.5~6v,io=10ma - 0.01 0.4 % load regulation dvload3 ta=25 o c vin=5v, 10ma < io < 400ma - 0.4 0.8 % dropout voltage vdrop3 io=400ma - 1.1 1.3 v ripple rejection rr3 f=120hz, co=10uf tantalum vin - vout=2v, io=200ma 60 70 - db current limit *note ilimit3 vin - vout=3.0v 400 - - ma adjust pin current iadj 3 - - 0.1 - ua minimum load current ilmin3 - 10 - - ma temperature stability temp3 - - 0.5 - % on voltage von vout=enabled - - 0.8 v off voltage voff vout=disabled 2.0 - - v on/off control part * note don?t exceed following current limit. ( iout1 : 500 ma, iout2 : 400 ma, iout3 : 400 ma )
- 6 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator application summary - on / off when you want to control output of the IP1531, use pin #2 as follows as shown in figure pin#2 is positive input of the comparator, and the other input is threshold voltage. if the voltage of the pin#2 rises above threshold voltage, then tr q1 will be saturated and the main bias current will be shut down. pin#2 vth main bias q1
- 7 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator typical application circuit vinput vout1 10uf vout1 vin on/off vout2 pgnd adj2 vout3 pgnd adj3 1 2 6 4 5 3 7 IP1531 vout2 vout3 10uf 10uf h l radj1 radj2 radj3 radj4 *calculation of output voltage vout2 = vref ( 1 + ( radj1 / radj2) ) =1.25v ( 1 + (radj1 / radj2) ) vout3 = vref ( 1 + (radj3 / radj4) ) =1.25v ( 1 + (radj3 / radj4) )
- 8 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator pin no pin name internal circuit 2 on/off 3,5,6 4,7 regulator output1,2,3 regulator adjustable pin internal circuit 2 5 7 4 3 6 vref
- 9 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator electrical characteristics curves 0 2 4 6 8 10 0 2 4 6 8 10 vo2=vo3=1.25v ro2=ro3=1k quiescent current icc (ma) vcc (v) -50 0 50 100 150 1.230 1.235 1.240 1.245 1.250 1.255 1.260 1.265 1.270 vref temperture stability vref (v) temp ( o c)
- 10 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator electrical characteristics curves (continued) 0 200 400 600 800 1000 3.20 3.25 3.30 3.35 3.40 vout1 load regulation (tj=25 o c) output voltage (v) output current (ma) 0 200 400 600 800 1000 1.10 1.15 1.20 1.25 1.30 1.35 vo2=vo3=1.25v vout2,3 load regulation (tj=25 o c) output voltage (v) output current (ma)
- 11 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator electrical characteristics curves (continued) 0 20 40 60 80 -300 -200 -100 0 100 200 io=50ma io=500ma vout1 load transient response output voltage deviation (mv) time (usec) 0 20 40 60 80 -200 -100 0 100 200 vout2=vout3=1.25v io=50ma io=400ma vout2,3 load transient response output voltage deviation (mv) time (usec)
- 12 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator electrical characteristics curves (continued) 0 200 400 600 800 0.6 0.8 1.0 1.2 1.4 dropout voltage dropout voltage (v) output current (ma)
- 13 - december. 2002 (rev.0) www.interpionsemi.com IP1531 triple output voltage ldo regulator package dimension 14soph - 8l #1 6.00 0.30 (0.236 0.012) 3.95 0.2 (0.156 0.008) 5.72 (0.225) 0.60 0.20 (0.024 0.008) 0 . 2 0 + 0 . 1 0 - 0 . 0 5 ( 0 . 0 0 8 , + 0 . 0 0 4 , - 0 . 0 0 2 ) 0~8 0 . 4 7 ( 0 . 0 1 9 ) 0 . 4 0 6 + 0 . 1 0 - 0 . 0 5 ( 0 . 0 0 8 , + 0 . 0 0 4 , - 0 . 0 0 2 ) 1 . 2 7 t y p ( 0 . 0 5 0 t y p ) 1.80max (0.071max) min0.05 (min0.002) 1.55 0.10 (0.061 0.004) 2 . 9 4 6 4 . 2 1 6 8 . 5 6 0 . 2 0 ( 0 . 3 4 7 0 . 0 0 8 ) 8 . 7 0 m a x ( 0 . 3 4 3 m a x )

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