wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1 of 6 product product product product product product product product program program program program program program program program part part part part number number number number input input input input voltage(vdc) voltage(vdc) voltage(vdc) voltage(vdc) output output output output voltage voltage voltage voltage (vdc) (vdc) (vdc) (vdc) current current current current (ma) (ma) (ma) (ma) efficienc efficienc efficienc efficienc y y y y (%,typ) (%,typ) (%,typ) (%,typ) nominal nominal nominal nominal range range range range normal normal normal normal adjust adjust adjust adjust range range range range vin vin vin vin (min.) (min.) (min.) (min.) vin vin vin vin (max.) (max.) (max.) (max.) wrn7803t-500 12 4.5-2 8 3.3 1.8-5.5 500 90 75 WRN7805T-500 12 6.0-28 5.0 2.5-8.0 500 94 81 wrn7809t-500 24 11-28 9.0 3.0-11.5 500 95 87 wrn7812t-500 24 14-28 12 4.5-13.5 500 95 90 wrn7815t-500 24 17-28 15 4.5-15.5 500 96 92 note: 1. answer for vin-vo>2v if needed to adjust the output voltage; 2. if input voltage above specified may cause permanent damage to the device. 3. wrn 7812t-500, wrn 7815t-500 is not allowed to operate under no load. model model model model model model model model selection selection selection selection selection selection selection selection wr wr wr wr wr wr wr wr n78 n78 n78 n78 n78 n78 n78 n78 05 05 05 05 05 05 05 05 t t t t - - - - - - - - 500 500 500 500 500 500 500 500 product series output voltage smd package style output current wide wide wide wide input, input, input, input, non-isolated non-isolated non-isolated non-isolated & & & & regulated regulated regulated regulated smd smd smd smd package package package package single single single single output output output output features features features features features features features features efficiency up to 96% no need for heat sinks 0.5amp smd package wide input voltage range(4.5v~28v) adjustable output voltage remote on/off control short circuit protection,thermal shutdown very low shutdown current super low ripple and noise applications applications applications applications applications applications applications applications the wrn 78xx t - 500 series with high efficiency switching regulators are ideally supply for space constrained mobile applications . they are no need for any heat sinks , even if operate at +85 . the additional features include remote on/off control and adjustable output voltage.super low ripple and noise of typically only 10mv and a shutdown input current of typically only 15ua . microdc reserves the copyright specifications specifications specifications specifications specifications specifications specifications specifications characteristics characteristics characteristics characteristics conditions conditions conditions conditions min. min. min. min. typ. typ. typ. typ. max. max. max. max. units units units units input voltage range see selection guide 4.5 12/24 28 v output voltage adjust range see selection guide 1.8 15.5 v output voltage accuracy input voltage range at full load 2 3 % line regulation input voltage range at full load 0.2 0.5 % load regulation nominal input ,10% to 100% load 0.3 0.75 % ripple and noise 20mhz bandwidth 10 25 mvp-p short circuit protection mode hiccup mode short circuit protection continuous, automatic recovery output current limit 1.8 a dynamic load stability 100%<->10% load 30 75 mv quiescent current normal input (3.3v, 5v output) 15 ma thermal shutdown internal ic junction 160 temperature coefficient -40 to +85 ambient 0.02 %/ max capacitance load 1000 f on/off control current on: open or 1.5 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 of 6 typical typical typical typical typical typical typical typical temperature temperature temperature temperature temperature temperature temperature temperature curve curve curve curve curve curve curve curve external external external external external external external external capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor tabl tabl tabl tabl tabl tabl tabl tabl part number c1 (ceramic capacitor) c2 (ceramic capacitor) wrn7803t-500 10uf/50v 22uf/16v WRN7805T-500 10uf/50v 22uf/16v wrn7809t-500 10uf/50v 22uf/16v wrn7812t-500 10uf/50v 10uf/25v wrn7815t-500 10uf/50v 10uf/25v standard standard standard standard standard standard standard standard application application application application application application application application circuit circuit circuit circuit circuit circuit circuit circuit 1. c1,c2: choose a ceramic type capacitors; c3 is require ,for best performance , use a 100 uf or more capacitor please. 2. c1,c2 are require and should be placed close to the pins of the converter, with shortest possible traces. 3. no parallel connection or plug and play. adjustment adjustment adjustment adjustment adjustment adjustment adjustment adjustment resistor resistor resistor resistor resistor resistor resistor resistor values values values values values values values values model wrn7803t-500 WRN7805T-500 wrn7809t-500 wrn7812t-500 wrn7815t-500 vo (nominal) 3.3v 5.0v 9v 12v 15v adjusted range 1.8v-5.5v 2.5v-8v 3v-11.5v 4.5v-13.5v 4.5v-15.5v regulated voltage r1(k ? ) r2(k ? ) r1(k ? ) r2(k ? ) r1(k ? ) r2(k ? ) r1(k ? ) r2(k ? ) r1(k ? ) r2(k ? ) 1.8v 24.31 2.5v 98.9 25.28 3.0v 364 47.6 3.1 3.3v 67.3 5.79 3.6v 129.1 95.8 8.47 3.9v 59.1 140.9 11.8 4.5v 24.3 411 19.14 4.55 2.69 4.9v 15.25 2060 25.77 8.05 5.55 5.0v 14.05 27.3 9.16 6.17 5.1v 12.8 208.5 29.22 10.41 6.98 5.5v 8.65 58.5 37.8 15 10 6.5v 15.57 70.8 29.8 18.5 7.2v 7.8 115.3 43.5 26.2 8.0v 3.15 243.1 64.8 36.7 9.0v 105 52.9 10.0v 18.84 180.6 76.3 11.0v 4.47 370 111 11.5v 1.61 635 134.1 12.0v 167.7 13.0v 40.6 277.8 13.5v 15 385 14.0v 586 14.5v 1128 15.0v 15.5v 88.2 note: the above dates only are as reference, you could make corresponding adjustment with actual output when they are at practical application.
wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3 of 6 test test test test test test test test configurations configurations configurations configurations configurations configurations configurations configurations (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 ) ) ) ) ) ) ) ) 1 1 1 1 efficiency efficiency efficiency efficiency and and and and output output output output voltage voltage voltage voltage ripple ripple ripple ripple test test test test 2 2 2 2 start-up start-up start-up start-up and and and and load load load load transient transient transient transient response response response response test test test test application application application application application application application application example example example example example example example example 1. to reduce output ripple, it is recommended to add a lc filter to output port. l: recommended parameter 10 h ~ 47 h.
wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 4 of 6 shutdown shutdown shutdown shutdown shutdown shutdown shutdown shutdown control control control control control control control control the on/off pin provides several features for adjusting and sequencing the power supply, a user has the flexibility of using the on/off pin as: 1) a digital on/off control by pulling down the on/off pin with an open-drain transistor. 2) line uvlo. if desired to achieve a uvlo voltage, an resistor divider from vin to on/off to gnd can be used to disable the converter until a higher input voltage is achieved. for example , it is not useful for a converter with 12v output to start up with a 12v input voltage, as the output cannot teach regulation. to enable the converter when the input voltage reaches 14v , a 51k ? ? 5k ? resistor divider from vin to gnd can be connected to the on ? off pin . both the precision 1.25v threshold and 150mv hysteresis are multiplied by the resistor ratio , providing a proportional 12% hysteresis for any startup threshold. so , the turn off threshold would be between 12.3v to 15.7v. 3) power supply sequencing. by connecting a small capacitor from on/off to gnd, the 2 a current source and 1.25v threshold can provide a stable and predictable delay between startup of multiple power supplies. for example, a startup delay of roughly 64ms is provided using 100nf, and roughly 136ms by using 200nf.
wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 5 of 6 characteristic characteristic characteristic characteristic characteristic characteristic characteristic characteristic curve curve curve curve curve curve curve curve (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 ) ) ) ) ) ) ) ) efficiency efficiency efficiency efficiency and and and and output output output output voltage voltage voltage voltage ripple ripple ripple ripple taping taping taping taping taping taping taping taping reel reel reel reel reel reel reel reel dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions note: unit :mm[inch] general tolerances: 0.50mm[ 0 .020inch] devices per reel quantity:500pcs inner packaging dimensions: l*w*h=365*350*150mm outer packaging dimensions: l*w*h=390*360*245mm
wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 wrn78xxt-500 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 6 of 6 package package package package package package package package style style style style style style style style and and and and and and and and pinning pinning pinning pinning pinning pinning pinning pinning mechanical mechanical mechanical mechanical dimensions dimensions dimensions dimensions recommended recommended recommended recommended footprint footprint footprint footprint tube tube tube tube outline outline outline outline dimensions dimensions dimensions dimensions microdc professional power module,inc. tel:0086-20-86000646 e-mail:tech@microdc.cn website:http://www.microdc.cn rohs rohs rohs rohs compliant compliant compliant compliant information information information information this series is compatible with rohs soldering systems with a peak wave solder temperature of 300 c for 10 seconds. the pin termination finish on the sip package type is tin plate, hot dipped over matte tin with nickel preplate. the dip types are matte tin over nickel preplate. both types in this series are backward compatible with sn/pb soldering systems. reach reach reach reach compliant compliant compliant compliant information information information information this series has proven that this product does not contain harmful chemicals, it also has harmful chemical substances through the registration, inspection and approval.
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