For more information, please visit the product page. date 01/26/2016 page 1 of 8 SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR FEATURES • • • • • • • • 500 mA current output high efficiency up to 96% no heat sink required SMT package remote on/off control low ripple and noise short circuit protection, thermal shutdown wide temperature (-40°C~+85°C) RoHS MODEL input voltage output voltage output current output power ripple and noise1 efficiency typ (Vdc) range (Vdc) (Vdc) (mA) max (W) max (mVp-p) Vin min (%) Vin max (%) V7803-500-SMT 12 4.5 ~ 28 3.3 500 1.65 25 90 75 V7805-500-SMT 12 6 ~ 28 5 500 2.5 25 94 81 V7812-500-SMT2 24 14 ~ 28 12 500 6 25 95 90 V7815-500-SMT 24 17 ~ 28 15 500 7.5 25 96 92 2 Notes: 1. ripple & noise are measured at 20 MHz BW with 1 µF ceramic cap and 10 µF electrolytic capacitors on the output 2. must operate with a minimum of 5% loading PART NUMBER KEY V78 XX - XXX -SMT- X Base Number Output Voltage Output Current cui.com Package Options "blank" = standard TR = Tape & Reel For more information, please visit the product page. CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 01/26/2016 │ page 2 of 8 INPUT parameter conditions/description min typ max units input voltage 3.3 Vdc output 5 Vdc output 12 Vdc output 15Vdc output 4.5 6 14 17 12 12 24 24 28 28 28 28 Vdc Vdc Vdc Vdc 1.1 1.25 1.4 Vdc remote on/off shutdown threshold voltage on/off control current on: off: open or 1.5<Vc≤6V GND or 0V<Vc<1V 2 shutdown input current µA 15 30 µA typ max units OUTPUT parameter conditions/description min max capacitive load 1000 µF line regulation measured from low line to high line at 100% load ±0.2 ±0.5 % load regulation measured from 10% to full load at nominal input ±0.3 ±0.75 % voltage accuracy measured from low line to high line at 100% load ±2 ±3 % adjustability see application notes ±0.02 %/°C max units 1 temperature coefficient Notes: 1. output voltage adjustment must meet Vin-Vo > 2V requirement PROTECTIONS parameter conditions/description short circuit protection hiccup, continuous, automatic recovery min thermal shutdown internal IC junction current limit typ 160 °C 1.8 A SAFETY AND COMPLIANCE parameter conditions/description RoHS 2011/65/EU MTBF as per MIL-HDBK-217F, 25°C min typ max 2,000,000 units hours ENVIRONMENTAL parameter conditions/description min see derating curve -40 -55 case operating temperature operating temperature storage temperature storage humidity typ max units 100 °C 85 °C 125 °C 95 % hand soldering for 10 seconds 300 °C reflow soldering refer to IPC/JEDEC J-STD-020D.1 240 °C cui.com For more information, please visit the product page. CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 01/26/2016 │ page 3 of 8 DERATING CURVES Load (%) 100 80 60 40 20 -40 -20 0 20 40 60 71 85 100 120 Ambient Temperature (°C) MECHANICAL parameter conditions/description min dimensions 15.24 x 8.30 x 7.25 (0.600 x 0.327 x 0.285 inch) case material plastic (UL94-V0) weight typ units: mm [in] pin tolerance: ±0.10 mm [±0.004 in] general tolerance: ±0.25 mm [±0.010 in] PIN CONNECTIONS 1 Vin 5 Vout 6 Vadj 7 GND 9 GND 10 On/Off cui.com units mm 2.3 MECHANICAL DRAWING max g For more information, please visit the product page. CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 01/26/2016 │ page 4 of 8 PACKAGING DIMENSIONS Taping dimension: ∅1.50 [0.059] 8.20 [0.323] 10.20 [0.402] 10.20[0.402] 6.50 [0.256] 0.50 [0.020] 15.65 [0.616] 14.70 [0.579] 1.75 [0.069] 11.50 [0.453] 2.00 [0.079] 12.40 [0.488] 16.00 [0.630] Taping reel dimension: ∅1.50 [0.059] 7.65 [0.301] 29.40 [1.157] ∅330.00 [12.992] 5.60 [0.220] ∅100.00[3.937] Note: Unit :mm[inch] General tolerances: 0.50mm[ 0.020inch] L=530mm[20.866inch] Tube Quantity: 33pcs L=220mm[8.661inch] Tube Quantity: 13pcs ∅13.00 [0.512] ∅21.50 [0.846] Note: Unit :mm[inch] General tolerances: 0.50mm[ 0.020inch] Devices per reel quantity:500pcs TYPICAL APPLICATION CIRCUIT V78XX-500-SMT 1. 2. 3. 4. C1, C2: Use ceramic capacitors (see table below); C3: For best performance, use a 100 μF or more capacitor. C1, C2, & C3 are required and should be placed close to the pins of the converter, with shortest possible leads. R1 is used when trimming down. R2 is used when trimming up. No parallel connection or plug and play. Part Number C1 (ceramic capacitor) C2 (ceramic capacitor) V7803-500-SMT 10uF/50V 22uF/16V V7805-500-SMT 10uF/50V 22uF/16V V7812-500-SMT 10uF/50V 10uF/25V V7815-500-SMT 10uF/50V 10uF/25V cui.com For more information, please visit the product page. CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 01/26/2016 │ page 5 of 8 OUTPUT TRIMMING Pa rt Na me Vo nom V7803-500-SMT 3.3 V V7805-500-SMT 5.0 V V7812-500-SMT 12V V7815-500-SMT 15V Trim Down Trim Up R 1(KΩ ) 61 *Vo- 75.1 0 = 3.3-Vo 61*Vo-9 1.52 = 5.0 -Vo 71 *Vo- 287 .02 = 12-Vo R 2(K Ω ) 75.1 0-10 *Vo = Vo -3.3 = 91.5 2-10 *Vo Vo -5.0 28 7.02- 20*Vo = Vo-1 2 = 6 6*Vo -26 9.37 15-Vo = 26 9.37- 15*Vo Vo-1 5 To trim the output of the device input the desired output voltage (Vo) into the proper equation. R1 trims the output voltage down and R2 trims the voltage up. If not using the trim feature R1 and R2 are left open. Make sure that the desired output voltage is within the trim range. TEST CIRCUIT 1) Efficiency and Output Voltage Ripple Test 25.4m m 25.4m m 12.7m m DC /DC Co nvert er 7 9 C1 Copp er strip 1 F 6 470pF C5 GND 5 C2 C3 +Vout 10 F Cer amic Ta ntalum Scope Load 1 2.54mm Vin Cerami c Copper strip 2) Start-up and Load Transient Response Test 5 0.8 m m C1 GND D C / DC C onverter 7 9 5 6 C5 47 0p F C er am ic Co ppe r s trip Scope C2 C3 Cop pe r s trip cui.com +Vout L oa d 1 2 .54 m m Vin For more information, please visit the product page. CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 01/26/2016 │ page 6 of 8 EFFICIENCY AND RIPPLE Efficiency (%) Ripple (m V) 100 45 90 40 80 35 70 V7803-500-SMT 60 V7805-500-SMT 50 V7812-500-SMT V7815-500-SMT 40 V7803-500-SMT 30 V7805-500-SMT 25 V7812-500-SMT V7815-500-SMT 20 15 30 20 10 10 5 0 20 50 80 120 160 200 240 280 320 360 400 440 480 500 550 Load (m A) 0 20 Efficiency VS Output Load (Vin=Norm) 50 80 120 160 200 240 280 320 360 400 440 480 500 550 Load (m A) Output Voltage Ripple VS Output Load (Vin=Norm) Ripple (mV) Efficiency (%) 100 45 95 40 90 35 85 V7803-500-SMT 80 V7805-500-SMT 75 70 65 V7812-500-SMT 25 V7815-500-SMT 20 60 V7803-500-SMT 30 V7805-500-SMT V7812-500-SMT V7815-500-SMT 15 55 10 50 5 45 0 40 4.5 6 8 10 12 14 16 17 20 22 24 26 28 Vin(V) Efficiency VS Input Voltage (Full Load) 4.5 6 8 10 12 14 16 17 20 22 24 26 28 Vin (V) Output Voltage Ripple VS Input Voltage (Full Load) Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com [email protected] CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. For more information, please visit the product page. CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 01/26/2016 │ page 7 of 8 SHUTDOWN 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. ON/OFF 2) Line UVLO. If desired to achieve a UVLO voltage, a 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 , as the output cannot each regulation. To enable the converter when the input voltage reaches 14V, a 51kΩ/5kΩ voltage 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. 1 10 51 KΩ C1 V78XX-500-SMT 7,9 +Vout 6 470pF 5 KΩ GND 5 100 F Lo ad Vin 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. +Vout 1 V78XX- 500- SM T 5 C1 10 7,9 6 C5 GND 470pF 100nF Loa d Vin 100 F CH1: Von/off CH2: Vo Delay time: 64mS 1 C1 V78XX- 500- SM T 10 C5 GND 2 00 nF 7,9 5 +Vout 6 4 70pF 100 F Load Vin CH1: Von/off CH2: Vo Delay time: 136mS cui.com For more information, please visit the product page. CUI Inc │ SERIES: V78-500-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 01/26/2016 │ page 8 of 8 REVISION HISTORY rev. description date 1.0 initial release 01/04/2008 1.01 new template applied 04/28/2009 1.02 V-Infinity branding removed 09/06/2012 1.03 added TR package option 10/31/2012 1.04 added minimum loading requirement note 01/30/2013 1.05 updated spec 03/08/2013 1.06 housing width changed, updated datasheet 01/26/2016 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com [email protected] CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.