For more information, please visit the product page. date 09/06/2012 page 1 of 5 SERIES: VBSD0.25-SIP │ DESCRIPTION: DC-DC CONVERTER FEATURES • • • • • • 0.25 W isolated output industry standard 4 pin SIP package single unregulated outputs -40~85°C temperature range 1,000 Vdc isolation no heatsink required RoHS input voltage MODEL output voltage output current output power ripple and noise efficiency typ (Vdc) range (Vdc) (Vdc) min (mA) max (mA) max (W) max (mVp-p) typ (%) VBSD0.25-S3.3-S3.3-SIP 3.3 3.0 ~ 3.6 3.3 5 76 0.25 100 64 VBSD0.25-S3.3-S5-SIP 3.3 2.97 ~ 3.63 5 5 50 0.25 100 64 VBSD0.25-S5-S3.3-SIP 5 4.5 ~ 5.5 3.3 8 76 0.25 100 64 VBSD0.25-S5-S5-SIP 5 4.5 ~ 5.5 5 5 50 0.25 100 64 VBSD0.25-S5-S9-SIP 5 4.5 ~ 5.5 9 3 28 0.25 100 65 VBSD0.25-S5-S12-SIP 5 4.5 ~ 5.5 12 2 21 0.25 100 67 VBSD0.25-S5-S15-SIP 5 4.5 ~ 5.5 15 2 17 0.25 100 65 VBSD0.25-S12-S3.3-SIP 12 10.8 ~ 13.2 3.3 8 76 0.25 100 64 VBSD0.25-S12-S5-SIP 12 10.8 ~ 13.2 5 5 50 0.25 100 65 VBSD0.25-S12-S9-SIP 12 10.8 ~ 13.2 9 3 28 0.25 100 66 VBSD0.25-S12-S12-SIP 12 10.8 ~ 13.2 12 2 21 0.25 100 67 VBSD0.25-S12-S15-SIP 12 10.8 ~ 13.2 15 2 17 0.25 100 66 VBSD0.25-S24-S5-SIP 24 21.6 ~ 26.4 5 5 50 0.25 100 63 VBSD0.25-S24-S12-SIP 24 21.6 ~ 26.4 12 2 21 0.25 100 65 VBSD0.25-S24-S15-SIP 24 21.6 ~ 26.4 15 2 17 0.25 100 66 Notes: 1. All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless otherwise specified. PART NUMBER KEY VBSD0.25-S XX - S XX -SIP Base Number Output Voltage Input Voltage cui.com For more information, please visit the product page. CUI Inc │ SERIES: VBSD0.25-SIP │ DESCRIPTION: DC-DC CONVERTER date 09/06/2012 │ page 2 of 5 INPUT parameter conditions/description min typ max units operating input voltage 3.3 V model 5 V model 12 V model 24 V model 2.97 4.5 10.8 21.6 3.3 5 12 24 3.63 5.5 13.2 26.4 Vdc Vdc Vdc Vdc min typ OUTPUT parameter line regulation conditions/description for Vin change of 1% max units ±1.5 ±1.2 % % 15 12.8 8.3 6.8 6.3 20 15 15 15 15 % % % % % 50 100 mVp-p 3.3 V model all other models 3.3 V model 5 V model 9 V model 12 V model 15 V model load regulation measured from 10% to full load voltage accuracy see tolerance envelope graph output ripple 20 MHz bandwidth switching frequency 100% load, input voltage range 110 temperature coefficient kHz ±0.03 %/°C max units 1 s max units PROTECTIONS parameter conditions/description min typ short circuit protection over temperature and over voltage protection linear voltage regulator with overheat protection is connected to the input or output end in series for OTP and OVP SAFETY AND COMPLIANCE parameter conditions/description isolation voltage tested for 1 minute 1,000 min Vdc insulation resistance at 500 Vdc 1,000 MΩ RoHS compliant yes 3,500,000 hours MTBF typ ENVIRONMENTAL parameter conditions/description min typ max units case operating temperature -40 85 °C storage temperature -55 125 °C storage humidity non-condensing temperature rise 100% load lead temperature 1.5 mm from the case for 10 seconds 15 cui.com 95 % 25 °C 300 °C For more information, please visit the product page. CUI Inc │ SERIES: VBSD0.25-SIP │ DESCRIPTION: DC-DC CONVERTER date 09/06/2012 │ page 3 of 5 DERATING CURVES Load (%) 100 80 60 40 20 -40 -20 0 20 40 60 85 100 105 Ambient Temperature (°C) MECHANICAL parameter conditions/description dimensions 0.461 x 0.374 x 0.2.36 (11.70 x 9.50 x 6.00 mm) min case material plastic UL94-V0 typ max inch weight 2.1 g MECHANICAL DRAWING Units: mm All pins on a 2.54mm pitch All pin diameters are 1.0mm Side view 1 2 3 4 RoHS PIN CONNECTIONS 1 1 2 3 4 Bottom view cui.com units GND 2 Vin 3 0V 4 +Vout For more information, please visit the product page. CUI Inc │ SERIES: VBSD0.25-SIP │ DESCRIPTION: DC-DC CONVERTER date 09/06/2012 │ page 4 of 5 APPLICATION NOTES 1. Requirement on Output Load In order to ensure the product operates efficiently and reliably, make sure the specified range of input voltage is not exceeded and the minimum output load is not less than 10% load. If the actual load is less than the specified minimum load, the output ripple may increase sharply while its efficiency and reliability will reduce greatly. If the actual output power is very small, please add an appropriate resistor as extra loading. 2. Overload Protection Under normal operating conditions, the output circuit of these products has no protection against over-current and short-circuits. The simplest method is to connect a self-recovery fuse in series at the input end or add a circuit breaker to the circuit. 3. Filtering In some circuits which are sensitive to noise and ripple, a filtering capacitor may be added to the DC/DC output end and input end to reduce the noise and ripple. However, the capacitance of the output filter capacitor must be proper. If the capacitance is too big, a startup problem might arise. For every channel of output, provided the safe and reliable operation is ensured, the greatest capacitance of its filter capacitor sees the external capacitor table. To get an extremely low ripple, an “LC” filtering network may be connected to the input and output ends of the DC/DC converter, which may produce a more significant filtering effect. It should also be noted that the inductance and the frequency of the “LC” filtering network should be staggered with the DC/DC frequency to avoid mutual interference (Figure 1). Figure 1 L L +Vin Cout DC DC Cin +Vout -Vin 4. -Vout Output Voltage Regulation and Over-voltage Protection Circuit The simplest device for output voltage regulation, over-voltage and over-current protection is a linear voltage regulator with overheat protection that is connected to the input or output end in series (Figure 2). +Vin Figure 2 -Vin +Vout REG DC DC -Vout REG +Vin -Vin +Vout DC DC -Vout cui.com For more information, please visit the product page. CUI Inc │ SERIES: VBSD0.25-SIP │ DESCRIPTION: DC-DC CONVERTER date 09/06/2012 │ page 5 of 5 REVISION HISTORY rev. description date 1.0 initial release 06/01/2008 1.01 new template applied 03/05/2012 1.02 V-Infinity branding removed, VBSD0.25-S24-S9-SIP discontinued 08/06/2012 picture updated 09/06/2012 1.03 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.