date date 11/01/2012 11/01/2012 page page 1 of 5 1 of 5 SERIES: VAT2-SMT │ DESCRIPTION: DC-DC CONVERTER FEATURES • 2 W isolated output • industry standard 14 pin SMT package • dual unregulated outputs • 1,000 V isolation • short circuit protection • wide temperature (-40~85°C) • efficiency up to 85% RoHS input output output output ripple efŢ ciency MODEL 1 voltage voltage current power and noise typ range min max max max typ (Vdc) (Vdc) (Vdc) (mA) (mA) (W) (mVp-p) (%) VAT2-S5-D5-SMT 5 4.5~5.5 ±5 ±20 ±200 2 150 82 VAT2-S5-D9-SMT 5 4.5~5.5 ±9 ±11 ±111 2 150 83 VAT2-S5-D12-SMT 5 4.5~5.5 ±12 ±8 ±83 2 150 84 VAT2-S5-D15-SMT 5 4.5~5.5 ±15 ±7 ±67 2 150 82 VAT2-S12-D5-SMT 12 10.8~13.2 ±5 ±20 ±200 2 150 83 VAT2-S12-D9-SMT 12 10.8~13.2 ±9 ±11 ±111 2 150 84 VAT2-S12-D12-SMT 12 10.8~13.2 ±12 ±8 ±83 2 150 84 VAT2-S12-D15-SMT 12 10.8~13.2 ±15 ±7 ±67 2 150 85 Notes: 1. ripple and noise are measured at 20 MHz BW PART NUMBER KEY VAT2 - SXX - DXX -SMT - X Base Number Output Voltage Package Options "blank" = standard TR = Tape & Reel Input Voltage Packaging Style cui.com CUI Inc │ SERIES: VAT2-SMT │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 2 of 5 INPUT parameter conditions/description min typ max units 5 V model 4.5 5 5.5 Vdc operating input voltage 12 V model 10.8 12 13.2 Vdc OUTPUT parameter conditions/description min typ max units line regulation for Vin change of 1% ±1.2 % 5 V model 12.8 15 % measured from 10% 9 V model 8.3 10 % load regulation load to full load 12 V model 6.8 10 % 15 V model 6.3 10 % voltage accuracy see derating curves switching frequency 100% load 70 kHz temperature coefŢ cient 100% load ±0.03 %/°C PROTECTIONS parameter conditions/description min typ max units short circuit protection 1s SAFETY AND COMPLIANCE parameter conditions/description min typ max units isolation voltage for 1 minute at 1 mA max. 1,000 Vdc isolation resistance at 500 Vdc 1,000 MΩ MTBF 3,500,000 hours RoHS compliant yes ENVIRONMENTAL parameter conditions/description min typ max units operating temperature -40 85 °C storage temperature -55 125 °C storage humidity non-condensing 95 % temperature rise at full load 15 25 °C lead temperature 1.5 mm from case for 10 seconds 260 °C cui.com CUI Inc │ SERIES: VAT2-SMT │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 3 of 5 DERATING CURVES 1. output power vs. ambient temperature 2. output voltage vs. output current +10% +5% 100 +2.5% Nominal 80 Voltage -2.5% 60 -7.5% 40 20 -40 -20 0 20 40 60 85 105 120 10% 50% 100% Ambient Temperature (°C) Output Current (%) MECHANICAL parameter conditions/description min typ max units dimensions 0.700 x 0.500 x 0.236 (17.78 x 12.70 x 6.00 mm) inch case material plastic (UL94-V0) weight 2.1 g MECHANICAL DRAWING units: mm [inches] tolerance: ±0.25 [±0.010] pin section tolerance: ±0.10 mm [±0.004] PIN CONNECTIONS PIN FUNCTION 1 GND 2 +Vin 5-Vo 60 V 7+Vo 10 -Vo others NC cui.com Load (%) Output Voltate (%) CUI Inc │ SERIES: VAT2-SMT │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 4 of 5 APPLICATION NOTES 1. Requirement on Output Load In order to ensure the product operates efŢ ciently and reliably, make sure the speciŢ ed 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 speciŢ ed minimum load, the output ripple may increase sharply while its efŢ ciency 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 Ţ ltering 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 Ţ lter 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 Ţ lter capacitor sees the external capacitor table. To get an extremely low ripple, an “LC” Ţ ltering network may be connected to the input and output ends of the DC/DC converter, which may produce a more signiŢ cant Ţ ltering effect. It should also be noted that the inductance and the frequency of the “LC” Ţ ltering network should be staggered with the DC/DC frequency to avoid mutual interference (Figure 1). Figure 1 4. 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). Figure 2 5. External Capacitor Table It is not recommended to connect any external capacitor in the application Ţ eld with less than 0.5 W output. Vin Cin Vout Cout (Vdc) (μF) (Vdc) (μF) 5 4.7 ±5 4.7 Table 1 12 2.2 ±9 2.2 -- -- ±12 1 -- -- ±15 0.47 cui.com CUI Inc │ SERIES: VAT2-SMT │ DESCRIPTION: DC-DC CONVERTER date 11/01/2012 │ page 5 of 5 REVISION HISTORY rev. description date 1.0 initial release 02/11/2008 1.01 new template applied 04/20/2012 1.02 V-InŢ nity branding removed 09/04/2012 1.03 added TR package option 11/01/2012 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Fax 503.612.2383 Tualatin, OR 97062 cui.com 800.275.4899 techsupport@cui.com 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.