tp78xx-2 series www.gztoppower.com tel:020-61038836 email:sales@gztoppower.com page 1 of 3 description tp78xx-2 series switching regulators are ideal replacement for tp78xx linear regulators and ldos. the efficiency of up to 92% means that very little energy is wasted as heat so there is no need for any heat sinks with their additional space and mounting costs. they are widely used in industrial control, instrumentation, and electric power applications. wide input non-isolated & regulated single output output characteristics parameter conditions min typ. max. units output voltage accuracy 100% full load, input voltage range 2 3 % line regulation vin=min. to max, at full load 0.5 0.75 load regulation 10% to 100% load 0.5 1.0 ripple & noise 20mhz bandwidth,(refer to figure 3) 25 45 mvp-p short circuit protection continuous, auto-recovery thermal shutdown internal ic junction 150 output current limit 5000 ma switching frequency full load, input voltage range 300 340 380 khz dynamic load stability 100 ma quiescent current vin from min to max and at 0% load 5 10 ma temperature coefficient ?40 ~+85 0.03 %/ max capacitance load 1000 f all specifications typical at ta=25oc, nominal input voltage and rated output current unless otherwise specified. common specifications parameter conditions min. typ. max. units storage humidity range 95 operating temp. range power derating (above 71oc) -40 85 storage temp. range -55 125 storage temp. range temp rise at full load 100 lead temperature 1.5mm from case for 10 seconds 300 cooling free air convection case material plastic (ul94-v0) mtbf 25 mil-hdbk-217f 2000 k hours weight 4.0 g features rohs compliant wide input non-isolated regulated single output efficiency up to 93% short circuit protection, thermal shutdown temperature range: -40 oc ~ +85 oc low ripple noise sip package no heat sink required industry standard pinout selection guide part number input voltage (vdc) output efficiency % nominal range voltage vdc) current ma) vin (min) vin(max) tp781.5-2 12 4.75~18 1.5 2000 79 76 tp781.8-2 12 4.75~18 1.8 2000 81 79 tp782.5-2 12 4.75~18 2.5 2000 85 83 tp783.3-2 12 4.75~18 3.3 2000 87 86 tp785.0-2 12 7-18 5.0 2000 91 88 tp786.5-2 12 8.5-18 6.5 2000 92 91 the above part number with "l" suffix are 90 ? bent pins power converters, for example tp78l1.5-2l.
tp78xx-2 series www.gztoppower.com tel:020-61038836 email:sales@gztoppower.com page 2 of 3 temperature derating graphs external capacitor table part number c1(ceramic capacitor) c2(ceramic capacitor) tp781.5-2 10 f/25v 22 f/6.3v tp781.8-2 10 f/25v 22 f/6.3v tp782.5-2 10 f/25v 22 f/6.3v tp783.3-2 10 f/25v 22 f/6.3v tp785.0-2 10 f/25v 22 f/16v tp786.5-2 10 f/25v 22 f/16v standard application circuit note: 1. c1 and c2 are required and should be fitted close to the converter pins. 2. the capacitance of c1,c2 sees external capacitor table, it can be increased properly if required, and tantalum or low esr el ectrolytic capacitors may also suffice. 3. no parallel connection or plug and play. test configurations ta=25 1.efficiency and output voltage ripple test 2. 2.start-up and load transient response test tp78xx-2 25.4 mm 25.4 mm 12.7 mm dc/dc converter 1 2 3 +vin gnd ceramic tantalum scope load 25.4 mm c1 c2 copper strip copper strip +vout 1uf 1uf dc/dc converter 1 2 3 +vin gnd scope load 25.4 mm c1 c2 copper strip 50.8 mm +vout copper strip
tp78xx-2 series www.gztoppower.com tel:020-61038836 email:sales@gztoppower.com page 3 of 3 mechanical dimensions pin connections sip package pin function 1 +vin 2 gnd 3 +vout recommended footprint details tube outline dimensions 0.30 19.00 bottom view 3 12 0.50 5.08 4.10 11.50 9.00 17.50 9.00 tp781.5-2l yyww toppower unless otherwise stated all dimensions in mm 0.5mm. l=520mm 2mm packaging quantity:44pcs l=220mm 2mm packaging quantity:17pcs 2.54 2.54 3 1.00 1.15 unless otherwise stated all dimensions in mm 0.5mm. 11.50 9.00 bottom view 5.08 0.50 4.10 17.50 0.50 tp781.5-2 yyww 3 2 1 0.30 toppower 90 ? bent pins power converters(part number with "l" suffix) 20.2 6.2 26.2 11.2 11.6 23.6 20.6 16.2 11.2 5.2 unless otherwise stated all dimensions in mm 0.5mm. all dimensions in mm 0.25.all pins on a 2.54mm pitch. 90 ? bent pins power converters(part number with "l" suffix) 90 ? bent pins power converters (part number with "l" suffix)
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