APU1206/apu1207/apu1208/apu1209 200706062-1/9 data and specifications subject to change without notice. typical application description the APU1206 family of devices are ultra low dropout 1a regulators using pnp transistor as the pass element. these products are ideal when a single input supply is only available and the dropout voltage is less than 1v, exceeding the minimum dropout characteristics of npn/ pnp hybrid regulators. one common application of these regulators is where input is 3.3v and a 2.5v output is needed. besides the low dropout of less than 0.5v, other fea- tures of the family of the parts are: micro-power shut- down capability and output uvlo detection where flag pin is switched low when output is below 5% of its nomi- nal point. 1a very low dropout positive fixed and adjustable regulators technology licensed from international rectifier figure 1 - typical application of the 1206-xx in a 3-pin sot-223 package. low dropout voltage (500mv at 1a) 1% voltage reference accuracy low ground current 1 a maximum quiescent current in shutdown (apu1207, apu1208) fast transient response current limit and thermal shutdown error flag signal for output out of regulation (apu1207, apu1208) rohs compliant features 2.5v supply from 3.3v input for the new generation of logic ics computer mother board, add-on cards high efficiency post regulator in switch mode power supply (smps) applications v in v out c1 c2 APU1206- xx 3 1 2 v out gnd v in
APU1206/apu1207/apu1208/apu1209 2/9 package order information t j ( c) 2-pin 3-pin 8-pin plastic voltage pin functions to-252(h) sot-223(k) soic(m) 0 to 125 APU1206h-18 APU1206k-18 na 1.8v v in , v out , gnd 0 to 125 APU1206h-25 APU1206k-25 na 2.5v v in , v out , gnd 0 to 125 APU1206h-33 APU1206k-33 na 3.3v v in , v out , gnd 0 to 125 na na apu1207m-18 1.8v v in , v out , gnd, enable, flag 0 to 125 na na apu1207m-25 2.5v v in , v out , gnd, enable, flag 0 to 125 na na apu1207m-33 3.3v v in , v out , gnd, enable, flag 0 to 125 na na apu1208m adj v in , v out , gnd, flag, adj 0 to 125 na na apu1209m adj v in , v out , gnd, enable, adj basic part
APU1206/apu1207/apu1208/apu1209 3/9 absolute maximum ratings input voltage (v in ) .................................................... 10v enable input voltage ................................................ 10v storage temperature range ...................................... -65c to 150c operating junction temperature range ..................... 0c to 135c package information ja =55 c/w for 1" sq pad 2-pin plastic to-252 (d-pak) 3-pin plastic sot-223 (k) APU1206 APU1206 ja =70 c/w for 0.5" sq pad ja =90 c/w for 0.4" sq pad 8-pin plastic soic (m) apu1207 apu1208 apu1209 ja =55 c/w for 1" sq pad ja =55 c/w for 1" sq pad electrical specifications unless otherwise specified, these specifications apply over c in =c out =10 f, v in =vo+1v, v out =v fb (for adjustable version only), and t a =25c. typical values refer to t a =25c. low duty cycle pulse testing is used which keeps junction and case temperatures equal to the ambient temperature. v in v out tab is gnd 1 3 front view v in gnd v out tab is gnd 3 1 2 top view gnd flag v out v in enable gnd gnd gnd 4 3 2 1 5 6 7 8 top view gnd adj v out v in flag gnd gnd gnd 4 3 2 1 5 6 7 8 top view gnd adj v out v in enable gnd gnd gnd 4 3 2 1 5 6 7 8 top view initial voltage accuracy (see table 1 for nominal values) line regulation load regulation (note 1) output voltage temp coef. dropout voltage (note 2) ground current (note 3) current limit minimum input voltage apu1208, apu1209 adjust pin current minimum load current parameter sym test condition min typ max units vo v i v l v o(t) v i(o) i q i cl v in(min) i adj i o(min) io=10ma, t a =25j (note 4) vo + 1v APU1206/apu1207/apu1208/apu1209 4/9 pin descriptions the input pin of the regulator. typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum drop out voltage during the load transient response. this pin must always be 0.6v higher than v out in order for the device to regulate properly. the output of the regulator. a minimum of 2.2 f capacitor must be connected from this pin to ground. ground pin. this pin must be connected to the lowest potential in the system and all other pins must be at higher potential with respect to this pin. enable pin. a low signal or left open on this pin shuts down the output. this pin must be tied hi or to v in for normal operation. an open collector output that switches low when the output voltage drops about 4% below its expected regulated voltage. a resistor divider from this pin to the v out pin and ground sets the output voltage. application information stability the apu120x series of regulators require the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. a minimum of 2.2 f capacitance and the esr in the range of 0.5 to 2[ in- sures the stability of the system. part number output voltage APU1206-18 1.8v APU1206-25 2.5v APU1206-33 3.3v apu1207-18 1.8v apu1207-25 2.5v apu1207-33 3.3v apu1208 1.24v apu1209 1.24v note 1: low duty cycle pulse testing with kelvin con- nections is required in order to maintain accurate data. note 2: dropout voltage is defined as the minimum dif- ferential voltage between v in and v out required to main- tain regulation at v out . it is measured when the output voltage drops 1% below its nominal value. apu1207, apu1209 ground current - sd activated enable pin input lo voltage enable pin input hi voltage enable pin input lo current enable pin input hi current apu1207, apu1208 flag output threshold voltage flag output hysteresis voltage flag output saturation voltage note 3 : ground current is the regulator quiescent cur- rent plus the pass transistor current. the total current from the supply is the sum of the load current plus the ground pin current. note 4 : the specification applies for the junction tem- perature of 0 to +125j . v in (all devices) v out (all devices) gnd (all devices) enable (apu1207, apu1209) flag (apu1207, apu1208) adj (apu1208, apu1209) table 1 - output voltage vs. part number. pin symbol pin description i q(sd) v en(l) v en(l) v th(fg) v hys v f(sat) enable=open regulator off (note 4) regulator on (note 4) v en(l) =0v to 0.8v (note 4) v en(l) =2v to vin (note 4) output ramping up io=5ma io=500 a parameter sym test condition min typ max units 2 0.01 0.1 100 5 0.8 400 230 1 0.8 2 600 a v v a a %v o %v o mv
APU1206/apu1207/apu1208/apu1209 5/9 ref desig description qty part # manuf c1 capacitor 1 10 f, tantalum avx c2 capacitor 1 10 f, tantalum avx r1 resistor 1 10k[ ,5% panasonic typical application ref desig description qty part # manuf c1 capacitor 1 10 f, tantalum avx c2 capacitor 1 10 f, tantalum avx figure 2 - typical application of APU1206. figure 3 - typical application of apu1207. note: tab must also be connected to ground. v in v out c1 c2 APU1206- xx 3 1 2 v out gnd v in v in v out r1 c1 c2 sd enable apu1207 error flag 1 2 3 4 enable v in gnd v out flag gnd gnd gnd 8 7 6 5
APU1206/apu1207/apu1208/apu1209 6/9 typical application figure 4 - typical application of apu1208 in 3.3v to 2.5v regulator. ref desig description qty part # manuf c1 capacitor 1 10 f, tantalum avx c2 capacitor 1 10 f, tantalum avx r1 resistor 1 127[ , 1% r2 resistor 1 124[ , 1% r3 resistor 1 10k[ , 5% v in v out r1 r2 c1 c2 apu1208 r3 error flag 1 2 3 4 flag v in gnd v out adj gnd gnd gnd 8 7 6 5 vo = 1.24 x 1 + r1 r2 ( )
APU1206/apu1207/apu1208/apu1209 7/9 typical application figure 5 - typical application of apu1209 in 3.3v to 2.5v regulator. ref desig description qty part # manuf c1 capacitor 1 10 f, tantalum avx c2 capacitor 1 10 f, tantalum avx r1 resistor 1 127[ , 1% r2 resistor 1 124[ , 1% v in v out r1 r2 c1 c2 apu12 09 sd enable 1 2 3 4 enable v in gnd v out adj gnd gnd gnd 8 7 6 5 vo = 1.24 x 1 + r1 r2 ( )
APU1206/apu1207/apu1208/apu1209 8/9 apu1 2 09 line regulation @ 5ma to 100ma 1.2 1.205 1.21 1.215 1.22 1.225 1.23 1.235 1.24 1.245 1.25 12v 11.5v 11v 10.5v 10v 9.5v 9v 8.5v 8v 7.5v 7v 6.5v 6v 5.5v 5v 4.5v 4v 3.5v 3v 2.5v 2v input voltage vout 0.00% 0.50% 1.00% 1.50% 2.00% 2.50% 3.00% 3.50% 4.00% 4.50% 5.00% % error vout percent error characteristics 5 sep 2001 15:15:05 apu1209 maximum output current ~ 1.25a while in the current limit mode. apu1209 output voltage in yellow. a dc offset equal to the output voltage is applied to improve resolution. the output is regulating current in this mode. figure 6 figure 7
APU1206/apu1207/apu1208/apu1209 9/9 apu1209 voltage drop-out variation with ambient temperature with various load currents 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 -50 0 50 100 150 temperature ( j) ma 100 ma 500 ma 1 a apu1209 ground current variation with ambient temperature 0 10 20 30 40 50 60 70 80 90 100 -50 0 50 100 150 ambient temperature ( j ) ma characteristics figure 8 figure 9 figure 10 apu1209 vout variation with ambient temperature w ith vin @ 3.5v and 12v 2.46 2.47 2.48 2.49 2.50 2.51 2.52 2.53 2.54 2.55 -50 0 50 100 150 3.5 v 12v
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