advanced power electronics corp. dual 600ma ldo regulator with enable function features description input voltage range : channel 1 : 3.4v to 5.5v channel 2 : 2.8v to 5.5v low quiescent current is 50ua/per channel (typ.) tight load and line regulation fast transient response current limit and thermal shutdown protection only low-esr ceramic capacitors required for stability available in the esop-8 pb-free package data and specifications subject to change without notice 201012073lg ape8839a typical applicatio n package ordering informatio n 1 the ape8839a is an efficient, precise dual-channel cmos ldo regulator optimized for ultra-low-quiescent applications. regulators output1 and output2 are capable of sourcing 600ma of output current. the regulators are stable with output capacitors as low as 1 f, including current limit, thermal shutdown protection, fast transient response, low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. the ape8839a contains internal pull high enable function that allows the output of each regulator to be turned off independently. the ape8839a regulators are available in used so-8 with exposed pad package. vin1 vout1 gnd c1 v in1 c2 ape8839a 1uf 1uf out1 v vout2 vin2 en1 c3 v in2 1uf c4 1uf out2 v 4 2 1 3 5 8 6,7 en2 on off on off ape8839ax - x mp : esop-8 output voltage package a:v out1 =3.3v, v out2 =1.8v b:v out1 =3.3v, v out2 =1.5v c:v out1 =3.3v, v out2 =1.2v ( top view ) 1 2 3 4 8 7 6 5 vout1 vout2 esop-8 gnd en2 vin1 gnd vin2 en1 gnd
advanced power electronics corp. ape8839 a absolute maximum ratings v in1 , v in2 pin voltage (v in1,2 ) ----------------------------- 6v output voltage (v out1 /v out2 ) ---------------------------- - gnd - 0.3 to v in + 0.3v enable voltage (v en1 /v en2 ) ------------------------------ - gnd - 0.3 to v in + 0.3v power dissipation (p d ) ------------------------------------ internally limited storage temperature range (t st ) --------------------- - -65c to 150c operating junction temperature range (t opj ) ----- - -40c to + 125c junction temperature (t j ) ------------------------------- - -40c to + 150c 15c/w 45c/w note: r thja is measured with the pcb copper area of approximately 1 in 2 (multi-layer). that need connect to exposed pad. electrical specifications ( v in1 = v in2 = 5v, t a =25 o c (unless otherwise noted)) parameter sym test condition min typ max units v in1 i out1 =30ma 3.4 - 5.5 v in2 i out2 =30ma 2.8 - 5.5 v en1/2h 2.0 - - v en1/2l - - 0.8 en pull-high resistance r en1/2 v in1 = v in2 = 5v 1.25 2.6 5 m shutdown current i sd i out1,2 =0ma, v in =5v, v en1,2 =0v -48 ua temperature shutdown t sd1,2 - 150 - c temperature shutdown hysterisis t sdr1,2 -40- c regulator1 output voltage accuracy v out1 i out1 =30ma 3.234 3.3 3.366 v output voltage temperature stability i out1 =10ma (note4) - 1 - % dropout voltage v drop1 i out1 =600ma, v out1 =v out1 -2% - 300 500 mv quiescent current i q1 i out1 =0ma, v in1 =5v - 50 80 ua line regulation v line1 v in1 = 4v to 5.5v, i out1 = 30ma - 0.1 0.2 %/v load regulation ? v load i out1 =1m~600ma -1040 mv current limit i limit1 v in1 = 5.0v 700 - - ma short circuit current i short1 v out1 <0.25 x v out1 - 500 - ma ripple rejection psrr1 i out1 =30ma, f=100hz - -60 - db regulator2 i out2 =30ma (ape8839amp-a) 1.764 1.8 1.836 i out2 =30ma (ape8839amp-b) 1.470 1.5 1.530 i out2 =30ma (ape8839amp-c) 1.176 1.2 1.224 output voltage temperature stability i out2 =10ma - 1 - % v out =1.2v - 1300 1600 v out =1.5v - 1000 1300 v out =1.8v - 700 1000 quiescent current i q2 i out2 =0ma, v in2 =5v - 50 80 ua line regulation v line2 v in2 = 2.8v to 5.5v, i out2 = 30ma - 0.1 0.2 %/v load regulation (note3) ? v load i out2 =1m~600ma -1030 mv current limit (note2) i limit2 v in2 = 5.0v 700 - - ma short circuit current i short2 v out2 <0.25 x v out2 - 500 - ma ripple rejection psrr2 i out2 =30ma, f=100hz - -60 - db note1: the device is not guaranteed to function outside its operating conditions. note2: current limit is measured at constant junction temperature by using pulsed testing with a low on time. note3: regulation is measured at constant junction temperature by using pulsed testing with a low on time. note4: guaranteed by design. 2 enable input threshold each channel v output voltage accuracy v drop2 mv v dropout voltage v out2 input voltage (note1) v thermal resistance from junction to case (r thjc ) thermal resistance from junction to ambient (r thja ) note i out2 =600ma, v out2 =v out2 -2%
advanced power electronics corp. ape8839 a pin descriptions pin symbol pin description gnd common ground en1 channel 1 shutdown control pin, the pin is internal pull high. en2 channel 2 shutdown control pin, the pin is internal pull high. vout1 channel1 output voltage vout2 channel2 output voltage vin1 channel1 input voltage vin2 channel2 input voltage block diagram function descriptions enable function 3 the ape8839a is a highly accurate, dual, low noise, cmos ldo voltage regulators with enable function. the output voltage for each regulator is set independently by fuse trimming. as illustrated in function block diagram, it consists of a reference, error amplifier, a p-channel pass transistor, an on/off control logic and an internal feedback voltage divider. the band gap reference is connected to the error amplifier, which compares the reference with the feedback voltage and amplifies the voltage difference. if the feedback voltage is lower than the reference voltage, the pass- transistor gate is pulled lower, which allows more current to pass to the vout pin and increases the output voltage. if the feedback voltage is too high, the pass transistor gate is pulled up to decrease the output voltage. the output voltage is feed back through an internal resistive divider connected to vout pin. additional blocks include an output current limiter, thermal sensor, and shutdown logic. en1 and en2 pin start and stop the corresponding outputs independently. those pins are internal pull high. when the en pin is switched to the power off level, the operation of all internal circuit stops, the build-in p-channel mosfet output transistor between pins vin and vout is switched off, allowing current consumption to be drastically reduced. current limit1 - + vin2 vout1 gnd error amp bandgap thermal shutdown enable1 en1 current limit2 - + error amp enable2 en2 vout2 vin1 for senstitive applications, due to the high internal pull-high resistance value, we recommend add the external pull-high resistor to reduce any external influence, such as the side effect brought by high humidity environment.
advanced power electronics corp. ape8839 a dropout voltage current limit thermal shutdown protection application information input capacitor 4 an input capacitance of 1 ? f is required between input pin and ground directly (the amount of the capacitance may be increased without limit). the input capacitor must be located less than 1cm from the device to assure input stability. a lower esr capacitor allows the use of less capacitance, while higher esr type (like aluminum electrolytic) requires more capacitance. capacitor types (aluminum, ceramic and tantalum) can be mixed in parallel, but the total equivalent input capacitance/ esr must be defined as above to stable operation. there are no requirements for the esr on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will be 1 ? f over the entire operating temperature range. like any low-dropout regulator, the ape8839a requires input and output decoupling capacitors. the device is specifically designed for portable applications requiring minimum board space and smallest components. these capacitors must be correctly selected for good performance (see capacitor characteristics section). please note that linear regulators with a low dropout voltage have high internal loop gains which require care in guarding against oscillation caused by insufficient decoupling capacitance. thermal shutdown protection limits total power dissipation of ape8839a. when the junction temperature exceeds t j = +150c, a thermal sensor turns off the pass transistor, allowing the ic to cool down. the thermal sensor turns the pass transistor on again after the junction temperature cools down by 25c, resulting in a pulsed output during continuous thermal shutdown conditions. thermal shutdown protection is designed to protect the ape8839a in the event of fault conditions. for continuous operation, the absolute maximum operating junction temperature rating of t j = +125c should not be exceeded. each channel of ape8839a includes a fold back current limiter. it monitors and controls the pass transistor?s gate voltage, estimates the output current, and limits the output current minimum 700ma. a regulator?s minimum input-output voltage differential, or dropout voltage, determines the lowest usable supply voltage. the ape8839a use a p- channel mosfet pass transistor, its dropout voltage is function of drain-to-source on- resistance rds (on) multiplied by the load current. v dropout = v in -v out = r ds(on) x i out
advanced power electronics corp. ape8839a output capacitor thermal considerations 5 the ape8839a series can deliver a current of up to 600ma/channel over the full operating junction temperature range. however, the maximum output current must be debated at higher ambient temperature to ensure the junction temperature does not exceed 125c. with all possible conditions, the junction temperature must be within the range specified under operating conditions. power dissipation can be calculated based on the output current and the voltage drop across regulator. p d = (v in - v out ) i out + v in x i q the final operating junction temperature for any set of conditions can be estimated by the following thermal equation: p d (max) = (t j (max) - t a ) / rth ja where t j (max) is the maximum junction temperature of the die (125 c) and t a is the maximum ambient temperature. the junction to ambient thermal resistance (rth ja ) esop-8 package at recommended minimum footprint is 45c/w that is connect 1 in 2 pcb copper area to exposed pad. the ape8839a is designed specifically to work with very small ceramic output capacitors. a ceramic capacitor (temperature characteristics x7r, x5r) in 1 ? f is suitable for the ape8839a application. the recommended minimum capacitance for the device is 1 ? f, x5r or x7r dielectric ceramic, between vout and gnd for stability, but it may be increased without limit. higher capacitance values help to improve transient. the output capacitor's esr is critical because it forms a zero to provide phase lead which is required for loop stability.
advanced power electronics corp. ape8839a typical performance characteristics 6 ? ??? ??? ?? ??? ???? ? ?? ?? ?? ?? ? ? a??a?3??? 3???3? ? 3??? ????????? ?????3? ?????3? ??? ??? ??? ?? ??? ??? ??? ??? ?? ??? ??? ??? ?3?? a??3?? 33?3a??3??????3?? ????????? a??e?? ? ??? ??? ??? ?? ??? ??? ??? ??? ?? ??? ??? ? ?? ?? ?? ?? ? ? a??3??? a??3?? a?33?3a??3??????3?? ????????? ?e ? ?? ?? ?? ?? ? ? ? ? ? ? ?a?3?? ???? ?? ??? 33?3????3?? ????????? 3?? ?????3? ?????3? ?? ?? ?? ? ?? ??? ??? ??? ?? ??? ?? ? ? ? ? ?3?? a?? ?? 33?3a??3??????3?? ????????? a??e?? ? ?? ?? ?? ? ?? ??? ??? ??? ?? ??? ?? ? ?? ?? ?? ?? ? ? a??3??? a??3?? a?33?3a??3??????3?? ????????? ?e
advanced power electronics corp. ape8839a typical performance characteristics 7 ??? ?? ??? ?? ??? ?? ??? ?? ?? ??: ??: ?: ?: ?: ?: ??: ??: ?? ??? a ? ?3 ? ? ?? ???3?3a??3???????? ????????? ?e a??e?? ? ?? ? ?? ? ??? ?? ?? ? ??? ??: ??: ?: ?: ?: ?: ??: ??: ?? ??? a??3?? ?? ???3?3a??3???????? ????????? ?e a??e?? ? ? ??? ??? ?? ??? ???? ??: ??: ?: ?: ?: ?: ??: ??: ?? ??? 3???3? ? ????????? a??e?? ? a??e?? ? ?? ???3?33??? ?????? ??????
advanced power electronics corp. ape8839a typical performance characteristics power on test (channel1) power on test (channel2) enable ?on test (channel 1) enable ?on test (channel 2) 8 load transient (channel 1) load transient (channel 2)
advanced power electronics corp. ape8839a marking information esop-8 9 part numbe r package code 8839amp-& ywwsss output voltage date code (ywwsss) y ? last digit of the year ww ? week sss ? sequence
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