advanced power electronics corp. APU8852 150ma ultra low dropout positive fixed regulators features description stable with 2.2uf low esr ceramic capacitor 2% voltage reference accuracy wide operating range: 2.5v ~ 16v 5ua quiescent current in shutdown current limit and thermal shutdown logic input enable pin rohs compliant & halogen free sot-23-5l package applications laptop, notebook & palmtop computers battery powered equipments pcmcia vcc & vpp regulator consumer electronics high efficiency linear power supplies data and specifications subject to change without notice 1 201204022 typical application the APU8852 device is an efficient linea r voltage regulator with better than 2% initial voltage accuracy, very low dropout voltage and very low ground current designed especially fo r hand held, battery powered applications. othe r features of the device are: ttl compatible enable/shutdown control input, current limiting and thermal shutdown. the APU8852 is available in fixed and adjustable output voltage versions in a small sot-23 5-pin package. figure 1 - typical application of the APU8852 adjustable voltage regulator. figure 2 - typical application of the APU8852-25 fixed voltage regulator. vin gnd en vout adj enable vin vout vo= 0.8 x (1+r1/r2) c2 2.2uf c1 2.2uf r1 r2 + + vin gnd en vout cbyp enable vin vout=2.5v c2 2.2uf c1 2.2uf + + + c3 1000pf
advanced power electronics corp. APU8852 absolute maximum ratings (t a =25 o c, unless otherwise specified.) input voltage (v in ) ----------------------------------------- - 18v enable input voltage (v en ) ------------------------------ - 18v storage temperature range (t st ) -------------------- - -65 to 150 o c operating junction temperature range (t j ) ------- -40 to 85 o c thermal resistance junction to ambient (rth ja ) note 256 o c/w note. rth ja is measured with the pcb copper area of approximately 1 in 2 (multi-layer). electrical specifications parameter sym test condition min typ max units reference voltage vo -2 - 2 % line regulation ? v i v o + 1vAPU8852x-xx y5 : sot-23-5l package output voltage blank : adj 18 : 1.8v 25 : 2.5v 28 : 2.8v 30 : 3.0v 33 : 3.3v adj fixed vin gnd en adj vout top view sot-23-5l en gnd vin vout cbyp top view sot-23-5l unless otherwise specified, these specifications apply over c in =c o =2.2f, i o =100a, v in(min) =2.5v(adjustabledevices) v in =v o + 1v(for fixed voltage devices), v out =v fb (for adjustable version only), c byp =470pf(for fixed voltage devices), v en =2v and t a =25 o c. typical values refer to t a =25 o c. low duty cycle pulse testing is used which keeps j unction and case temperatures equal to the ambient temperature. note 1: low duty cycle pulse testing with kelvin connections is required in order to maintain accurate data. note 2: dropout voltage is defined as the minimum differential voltage between vin and vout required to maintain regulation at vout. it is measured when the output voltage drops 1% below its nominal value. note 3: ground current is the regulator quiescent current plus the pass transistor current. the total current from the supply is the sum of the load current plus the ground pin current.
advanced power electronics corp. APU8852 pin descriptions pin symbol pin description 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 higher than vout by at least the amount of the dropout voltage and some margin in order for the device to regulate properly. 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 vin for normal operation. adj (adjustable only) a resistor divider from this pin to the vout pin and ground sets the output voltage. c byp (fixed only) a 470 to 1000pf bypass capacitor connected to this pin reduces the output noise. the output of the regulator. a minimum of 2.2uf with max esr of 1 3 vout vin gnd en figure 3 - APU8852y5 adjustable output block diagram. figure 4 - APU8852y5 fixed mode output block diagram. + - thermal shutdown current limit + 1 4 2 5 3 vin cbyp gnd vout en + - thermal shutdown current limit + 1 4 2 5 3 vin adj gnd vout en
advanced power electronics corp. APU8852 typical performance characteristics quiescent current vs. input voltage v in =5v , v out =3.3v , i out =10ma~150ma v in =4~16v , v out =3.3v, i out =10ma output voltage vs. input voltage v in =5v , v out =3.3v , i out =0a quiescent current vs. temperature v in =4v~16v, v out =3.3v, i out =0a, t j =25 o c output voltage vs. output current 4 v in =5v , v out =3.3v , i out =10ma output voltage vs. temperature v in =5v , v out =3.3v, i out =10ma psrr iq vs input voltage 0.0ua 20.0ua 40.0ua 60.0ua 80.0ua 100.0ua 120.0ua 140.0ua 160.0ua 180.0ua 200.0ua 4v 6v 8v 10v 12v 14v 16v input voltage iq iq vs temperature 0.0ua 20.0ua 40.0ua 60.0ua 80.0ua 100.0ua 120.0ua 140.0ua 160.0ua 180.0ua 200.0ua -60
advanced power electronics corp. APU8852 typical performance characteristics 5 line transient v in =5v , v out =3.3v , i out =10~150ma / 5ms , 2.5a/us load transient v in =4.3~5.3v, v out =3.3v, i out =10ma
advanced power electronics corp. APU8852 marking information sot-23-5l 6 part number : ry ry&ss date code ss:2004,2008,2012? ss :2003,2007,2011? s s:2002,2006,2010? ss :2001,2005,2009? output voltage : identification code v out blank adj d1.8v f2.5v g2.8v h3.0v i3.3v
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