For more information, please visit the product page. date 11/08/2012 page 1 of 6 SERIES: V78-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR FEATURES • • • • • • • • 0.5 A current output extremely high efficiency up to 97% no heat sink required pin compatible to LM78XX linear regulators available in straight and right angle SIP packages low ripple and noise short circuit protection, thermal shutdown wide temperature (-40~85°C) RoHS input voltage MODEL output voltage output current output power ripple and noise1 efficiency typ (Vdc) range (Vdc) (Vdc) max (mA) max (W) max (mVp-p) Vin min (%) Vin max (%) V7801-500 12 4.75~26 1.5 500 0.75 35 76 66 V78X2-500 12 4.75~28 1.8 500 0.9 35 79 67 V7802-500 12 4.75~28 2.5 500 1.25 35 85 73 V7803-500 24 4.75~28 3.3 500 1.65 35 90 80 V7805-500 24 6.5~32 5.0 500 2.5 35 93 84 V78X6-500 24 8~32 6.5 500 3.25 35 94 87 V7809-500 24 11~32 9.0 500 4.5 35 95 91 V7812-500 24 15~32 12 500 6 35 95 92 V7815-500 24 18~32 15 500 7.5 35 96 93 Notes: 1. ripple and noise are measured at 20 MHz BW PART NUMBER KEY V78 XX - 500 Base Number Output Voltage cui.com Output Current For more information, please visit the product page. CUI Inc │ SERIES: V78-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 11/08/2012 │ page 2 of 6 INPUT parameter conditions/description min typ max units operating input voltage 1.5 V output 1.8 V output 2.5 V output 3.3 V output 5 V output 6 V output 9 V output 12 V output 15 V output 4.75 4.75 4.75 4.75 6.5 8 11 15 18 12 12 12 24 24 24 24 24 24 26 28 28 28 32 32 32 32 32 Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc OUTPUT parameter conditions/description typ max units line regulation Vin = min ~ max, at full load 1.5~2.5 V models 3.3~15 V models min ±0.5 ±0.2 ±1.0 ±0.4 % % load regulation measured from 10% load to full load 1.5~2.5 V models 3.3~15 V models ±0.4 ±0.4 ±0.75 ±0.6 % % voltage accuracy 100% load ±2 ±3 % switching frequency 100% load, input voltage range 280 330 temperature coefficient 450 kHz ±0.02 %/°C max units PROTECTIONS parameter conditions/description short circuit protection continuous, automatic recovery min thermal shutdown internal IC junction typ 150 °C SAFETY AND COMPLIANCE parameter conditions/description min MTBF RoHS compliant typ max 2,000,000 units hours yes ENVIRONMENTAL parameter conditions/description min operating temperature -40 storage temperature -55 typ case temperature storage humidity non-condensing temperature rise at full load lead temperature 1.5 mm from case for 10 seconds max units 85 °C 125 °C 100 °C 95 25 cui.com % °C 300 °C For more information, please visit the product page. CUI Inc │ SERIES: V78-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 11/08/2012 │ page 3 of 6 DERATING CURVES 1. output power vs. ambient temperature 100 Load (%) 80 60 40 20 -40 -20 0 20 40 60 71 85 100 120 Ambient Temperature (°C) MECHANICAL parameter conditions/description dimensions 0.689 x 0.354 x 0.453 (11.50 x 9.00 x 17.50 mm) min case material plastic (UL94-V0) typ max inch weight 2.0 g MECHANICAL DRAWING >@ >@ >@ >@ units: mm [inches] tolerance: ±0.25 [±0.010] pin section tolerance: ±0.10 mm [±0.004] Front View >@ Side View >@ >@ >@ >@ >@ >@ >@ Bottom View >@ >@ PIN CONNECTIONS cui.com units PIN FUNCTION 1 +Vin 2 GND 3 +Vo For more information, please visit the product page. CUI Inc │ SERIES: V78-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 11/08/2012 │ page 4 of 6 TYPICAL APPLICATION CIRCUIT 1. C1 and C2 are required and should be fitted close to the converter pins 2. For the capatance of C1 and C2, see the external capacitor table. Low ESR types should be chosen 3. C3: a low ESR capacitor is required to keep the noise at the converter to a minimum. Ceramic capacitors are preffered, but tantalum of low ESR electrolytic capacitors may also suffice; General use 10μF/50V ceramic capacitor. C4 Optional, General use 100μF/25V electrolytic capacitor. 4. No parallel connection or plug and play TEST CIRCUIT + DC Power Source +Vin Voltage Meter - Electronic Load Current Meter Current Meter Cin +Vout DC/DC Converter GND 30cm, 18AWG A Cout Voltage Meter B 20MHz Oscilloscope Twisted 0V A 1. Cin = 10μF / 50V for 500mA and 22μF / 50V for 1A, Cout = 100μF / 16V. 2. C01 = 10μF / 50V Electrolytic, C02 = 0.1μF / 50V Ceramic. 3. All points labeled A refer to one junction. 4. All points labeled B refer to one junction. 5. Use a short ground loop for probing. Do not use a wired ground clip. cui.com + A C01 + C02 B B - A B For more information, please visit the product page. CUI Inc │ SERIES: V78-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 11/08/2012 │ page 5 of 6 EFFICIENCY AND RIPPLE Output Ripple Efficiency 50 100 95 40 V7803-500 V7805-500 85 80 V7806-500 V7809-500 75 70 V7812-500 65 Ripple (mVpp) Efficiency (%) 90 V7815-500 60 V7803-500 V7805-500 30 V7806-500 V7809-500 20 V7812-500 V7815-500 10 55 10 20 Vin(V) 0 Vin(V) 50 10 30 32 Efficiency vs. Vin (Full Load) 20 30 32 Ripple vs. Vin ( Full Load) 100 50 95 Efficiency (%) V7803-500 V7805-500 85 80 V7806-500 V7809-500 75 V7812-500 Ripple (mVpp) 40 90 V7803-500 V7805-500 30 V7806-500 V7809-500 20 V7812-500 V7815-500 V7815-500 70 10 65 0 60 100 200 300 400 500 Output Current(mA) Efficiency vs. Load (Vin=Vin_min) 100 600 200 300 400 500 600 Output Current (mA) Ripple vs. Load (Vin=Vin_min) 100 50 80 V7803-500 V7805-500 70 V7806-500 V7809-500 60 V7812-500 V7815-500 50 40 Ripple (mVpp) Efficiency (%) 90 40 V7803-500 V7805-500 V7806-500 V7809-500 30 V7812-500 20 V7815-500 10 30 0 20 100 200 300 400 500 Output Current (mA) Efficiency vs. Load (Vin=Vin_max) 100 600 200 300 400 Output Current (mA) Ripple vs. Load (Vin=24V) cui.com 500 600 For more information, please visit the product page. CUI Inc │ SERIES: V78-500 │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR date 11/08/2012 │ page 6 of 6 EXTERNAL CAPACITOR TABLE Part C1,C3 C2,C4 Number (Ceramic Capacitor) (Ceramic Capacitor) V7801-500 10 μF/50V 22 μF/6.3V V78X2-500 10 μF/50V 22 μF/6.3V V7802-500 10 μF/50V 22 μF/6.3V V7803-500 10 μF/50V 22 μF/6.3V V7805-500 10 μF/50V 22 μF/10V V78X6-500 10 μF/50V 10 μF/10V V7809-500 10 μF/50V 10 μF/16V V7812-500 10 μF/50V 10 μF/25V V7815-500 10 μF/50V 10 μF/25V REVISION HISTORY rev. description date 1.0 initial release 07/13/2010 1.01 new template applied 04/18/2012 1.02 V-Infinity branding removed 09/04/2012 1.03 updated typical application circuits 09/25/2012 1.04 updated external capacitor values 11/08/2012 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.