1/3 VAT2-SMT Series DC-DC Converter Rev. 12-2006 Description Features Designed to convert fixed voltages into an isolated voltage, the VAT2-SMT series is well suited for providing board-mount local supplies in a wide range of applications, including mixed analog/digital circuits, test & measurement equip., process/machine controls, datacom/telecom fields, etc... ·Isolated 2 W output ·Temperature range: -40°C~+85°C ·Unregulated ·High efficiency to 85% ·Dual voltage output ·Small footprint ·SMT package style ·Industry standard pinout ·UL94-V0 package ·No heatsink required ·1K VDC isolation ·High power density ·No external component required The semi-regulated output can be followed by 3-terminal regulators to provide output protection, in addition to output regulation. Model Number VAT2-S5-D5-SMT VAT2-S5-D9-SMT VAT2-S5-D12-SMT VAT2-S12-D5-SMT VAT2-S12-D9-SMT VAT2-S12-D12-SMT VAT2-S12-D15-SMT Input Voltage Nominal Range 5 Vdc 4.5~5.5 Vdc 5 Vdc 4.5~5.5 Vdc 5 Vdc 4.5~5.5 Vdc 12 Vdc 10.8~13.2 Vdc 12 Vdc 10.8~13.2 Vdc 12 Vdc 10.8~13.2 Vdc 12 Vdc 10.8~13.2 Vdc Output Voltage ±5 Vdc ±9 Vdc ±12 Vdc ±5 Vdc ±9 Vdc ±12 Vdc ±15 Vdc Output Current Max. Min. ±200 mA ±10 mA ±111 mA ±11 mA ±83 mA ±8 mA ±200 mA ±10 mA ±111 mA ±11 mA ±83 mA ±8 mA ±67 mA ±6 mA Efficiency 82% 83% 84% 83% 84% 84% 85% Package Style SMT SMT SMT SMT SMT SMT SMT Output Specifications Item Output power Line Regulation Load Regulation Output voltage accuracy Temperature drift Output ripple Switching frequency Test conditions For Vin change of 1% 10% to 100% full load (5V output) 10% to 100% full load (9V output) 10% to 100% full load (12V output) 10% to 100% full load (15V output) See tolerance envelope graph 100% load 20 MHz Bandwidth Full load, nominal input Min. 0.2 Typ. 10 6.5 6.0 6.0 100 100 Max. 2 1.2 15 15 15 15 Units W % % % % % 0.03 200 %/°C mVp-p KHz Note: 1. All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless otherwise specified. V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062 www.v-infinity.com 1-866-372-1258 2/3 VAT2-SMT Series DC-DC Converter Rev. 12-2006 General Specifications Short circuit protection Temperature rise at full load 1 second 25°C Max, 15°C Typ. Cooling Free air convection Operating temperature range -40°C to +85°C Storage temperature range -55°C to +125°C Soldering temperature 300°C (1.5mm from case for 10 sec.) Storage humidity range <95% Case material Plastic (UL94-V0) MTBF >3,500,000 hrs. Isolation Specifications Item Isolation Voltage Insulation Resistance Test Conditions Tested for 1 min. Test at 500 Vdc Min. 1000 1000 Typ. Max. Units Vdc MΩ Typical Characteristics Ambient Temperature ( ) Outline Dimensions & Recommended Layout Pattern 2.54 14 13 12 10 9 8 PIN PIN 18.03 12.7 1 2 3 5 6 7 RoHS 5 6 7 1 2 3 1 5.2 4 1 7.7 8 G ND Vin NA NA 0V +Vo 14 13 12 10 9 8 1 2 3 5 6 7 8 9 10 12 13 14 NA NA -Vo NA NA NA Top View A 2 .75 6.00 5.75 2 .74 2 .54 0 .2-0 .3 0 .25 Side View Front View Note: All Pins on a 2.54mm pitch; all pin diameters are 0.50mm; all dimensions in mm. V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062 www.v-infinity.com 1-866-372-1258 3/3 VAT2-SMT Series DC-DC Converter Rev. 12-2006 - Minimum loading Application Notes: The converter needs a minimum of 10% loading to maintain output regulation. Operation under no-load - Input filtering To reduce the reflected ripple current and minimize conditions will not cause immediate damages but EMI, especially when the converter input is more may reduce reliability, and cause performance not to than 2” away from the DC source, it is recommended meet specifications. to connect a low ESR electrolytic capacitor between Vin and Gnd. The values suggested are as shown in - Regulation Table 1. If additional filtering is required, the With a semi-regulated design, the converter’s output capacitance may be increased, or expanded to an LC voltage varies with load current and will change network as shown in Figure 1. proportionally to the input voltage. If regulated output is needed, an external regulator can be used Table 1 as shown in Figure 2. - Protection Input Voltage External Input Capacitance 5V 4.7 µF over-voltage or output over-load, and may be 12 V 2.2 µF permanently damaged if exposed to these conditions. 24 V 1.0 µF The converter has minimal protection against input An input clamping device can be used for input voltage limiting. An input fuse or an output fuse can also be used to protect against over-loading. - Output filtering - Dual outputs used as a single output An output capacitor is needed to meet output ripple The +Vout and -Vout can be used to obtain a single requirements as shown in Table 2. output that is the sum of the two outputs. In this Output capacitance may be increased for additional case, the COM pin shouldn’t be used. filtering, but should not exeed 10µF or expanded to an LC network as in Figure 1. - External Regulator An external 3-terminal regulator can be connected Table 2 to the output of the converter to achieve full regulation. Make sure the converter’s output voltage Vout External Ouput Capacitance 5V 4.7 µF 9V 2.2 µF 12 V 1.0 µF 15 V 0.47 µF provides sufficient head room for the regulator. An additional benefit is that the built-in protection features in the regulator, such as OCP, OTP, etc, will protect the converter also. In a complimentory supply, a negative output regulator must be used to achieve the negative regulated output. Vin +Vout REG REG DC DC DC DC 0V G ND L L Vin C DC DC GND C L -Vout +Vo C 0V -Vo <Figure 1> V-Infinity, LLC, 20050 SW 112th Ave., Tualatin, OR 97062 Vin REG REG DC DC DC DC GND +Vout 0V REG REG -Vout <Figure 2> www.v-infinity.com 1-866-372-1258