rev. The semi-regulated output can be followed by 3-terminal regulators to provide output protection, in addition to output regulation. 12/2009 W output ·temperature range: -40°C~+85°C ·unregulated ·high efficiency to 80% ·single voltage output ·small footprint ·SMD package style ·industry standard pinout ·UL94-V0 package ·no heatsink required ·1K Vdc isolation ·power density 0.85 W/cm³ ·no external component required ·low cost input voltage number VBT1-S3.3-S3.3-SMT VBT1-S3.3-S5-SMT VBT1-S5-S3.3-SMT VBT1-S5-S5-SMT VBT1-S5-S9-SMT VBT1-S5-S12-SMT VBT1-S5-S15-SMT VBT1-S5-S24-SMT VBT1-S12-S3.3-SMT VBT1-S12-S5-SMT VBT1-S12-S9-SMT VBT1-S12-S12-SMT VBT1-S12-S15-SMT VBT1-S12-S24-SMT VBT1-S15-S5-SMT VBT1-S15-S15-SMT VBT1-S24-S3.3-SMT VBT1-S24-S5-SMT VBT1-S24-S9-SMT VBT1-S24-S12-SMT VBT1-S24-S15-SMT VBT1-S24-S24-SMT date features · isolated 1 Designed to convert fixed voltages into an isolated voltage, the VBT1-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... model 1 of 4 DESCRIPTION: dc-dc converter PART NUMBER: VBT1-SMT description page nominal 3.3 Vdc 3.3 Vdc 5 Vdc 5 Vdc 5 Vdc 5 Vdc 5 Vdc 5 Vdc 12 Vdc 12 Vdc 12 Vdc 12 Vdc 12 Vdc 12 Vdc 15 Vdc 15 Vdc 24 Vdc 24 Vdc 24 Vdc 24 Vdc 24 Vdc 24Vdc output range 3.0~3.63 Vdc 3.0~3.63 Vdc 4.5~5.5 Vdc 4.5~5.5 Vdc 4.5~5.5 Vdc 4.5~5.5 Vdc 4.5~5.5 Vdc 4.5~5.5 Vdc 10.8~13.2 Vdc 10.8~13.2 Vdc 10.8~13.2 Vdc 10.8~13.2 Vdc 10.8~13.2 Vdc 10.8~13.2 Vdc 13.5~16.5 Vdc 13.5~16.5 Vdc 21.6~26.4 Vdc 21.6~26.4 Vdc 21.6~26.4 Vdc 21.6~26.4 Vdc 21.6~26.4 Vdc 21.6~26.4 Vdc voltage 3.3 Vdc 5 Vdc 3.3 Vdc 5 Vdc 9 Vdc 12 Vdc 15 Vdc 24 Vdc 3.3 Vdc 5 Vdc 9 Vdc 12 Vdc 15 Vdc 24 Vdc 5 Vdc 15 Vdc 3.3 Vdc 5 Vdc 9 Vdc 12 Vdc 15 Vdc 24 Vdc output current max. 303 mA 200 mA 303 mA 200 mA 111 mA 84 mA 67 mA 42 mA 300 mA 200 mA 111 mA 84 mA 67 mA 42 mA 200 mA 67 mA 300 mA 200 mA 110 mA 83 mA 67 mA 42 mA min. 30 mA 20 mA 30 mA 20 mA 12 mA 9 mA 7 mA 5 mA 30 mA 20 mA 12 mA 9 mA 7 mA 5 mA 20 mA 7 mA 30 mA 20 mA 11 mA 8 mA 7 mA 5 mA package efficiency 73% 74% 72% 77% 76% 79% 78% 78% 75% 69% 73% 73% 74% 79% 74% 79% 69% 70% 72% 75% 76% 77% style SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD SMD UL60950-1 YES YES NO YES YES YES YES NO NO YES YES YES YES NO NO NO NO NO NO NO NO NO *VB(X)T1-Series with ALT PIN config. (see dimensions, page 3) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.v-infinity.com rev. page 2 of 4 date 12/2009 DESCRIPTION: dc-dc converter PART NUMBER: VBT1-SMT OUTPUT SPECIFICATIONS item output power line regulation test conditions load regulation output voltage accuracy temperature drift output ripple/noise switching frequency min. 0.1 for Vin change of 1% for Vin change of 1% (3.3 V output) 10% to 100% full load (3.3 V output) 10% to 100% full load (5 V output) 10% to 100% full load (9 V output) 10% to 100% full load (12 V output) 10% to 100% full load (15 V output) 10% to 100% full load (24 V output) see tolerance envelope graph @ 100% load 20 MHz bandwidth full load, nominal input (5 V/12 V) full load, nominal input (24 V) typ. 15 12.8 8.3 6.8 6.3 5 50 100 500 max. 1 1.2 1.5 20 15 10 10 10 10 units W % % % % % % % % 0.03 75 %/°C mVp-p KHz KHz GENERAL SPECIFICATIONS short circuit protection <1 second temperature rise at full load 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 260°C (1.5mm from case for 10 sec.) storage humidity range <95% case material plastic (UL94-V0) safety 2 approved to UL60950-1 (E222736) MTBF >3,500,000 hrs. burn-in full load at +85°C, for 4 hours at no-load and 4 hours at full load. ISOLATION SPECIFICATIONS item isolation voltage insulation resistance NOTE: test conditions tested for 1 min. test at 500 Vdc min. 1000 1000 typ. max units Vdc M Ω 1. All specifications measured at TA=25°C, humidity <75%, nominal input voltage and rated output load unless otherwise specified. 2. See table on page 1 for available models. REFLOW SOLDERING PROFILE 26 0 o C Te mp eratur e ( o C) 250 1 0 S ec M ax 2 2 0o C 200 150 100 90 Sec Max ( >220 oC ) 50 0 Time ( s ec .) 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.v-infinity.com rev. page 3 of 4 date 12/2009 DESCRIPTION: dc-dc converter PART NUMBER: VBT1-SMT DIMENSIONS (mm) RECOMMENDED FOOTPRINT VBT1 (Side View) 6.25 [0.246] 6.00 [0.236] 8 7 6 5 2.54 [0.100] 1 2 3 4 2.10 [0.083] 10.10 [0.398] 0.60 [0.024] 0.25 [0.010] 12.70 [0.500] 1.00 [0.039] 2.54 [0.100] 2.54 [0.100] VB(x)T1 8 7 6 5 (Top View) 7.50 [0.295] 1 2 3 11.20 [0.441] 8 1 A 8.50 [0.335] 1.35 [0.053] 2 4 0.25 [0.010] A 0.25 [0.010] 5 4 5° max 0.10mm[ 0.004inch] Note: Unit: mm[inch] Pin section: 0.60 x 0.25 mm (0.024 x 0.010 inch) Pin tolerances: ±0.10 mm (±0.004 inch) General tolerances: 0.25mm[ 0.06inch] FOOTPRINT DETAILS Pin SINGLE ALT -Vin 1 -Vin +Vin 2 +Vin -Vo 4 -Vo +Vo +Vo 5 3,6,7 No Pin NC NC 8 NC NC:No Connection TYPICAL CHARACTERISTICS 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.v-infinity.com rev. page 4 of 4 date 12/2009 DESCRIPTION: dc-dc converter PART NUMBER: VBT1-SMT - Minimum loading APPLICATION NOTES: During operation, the minimum output load should not be less than 10% of the full load, and that this product should never - Input filtering To reduce the reflected ripple current and minimize EMI, be operated under no load. If the actual output power is very especially when the converter input is more than 2” away from small, please connect a resistor with proper resistance at the the DC source, it is recommended to connect a low ESR output end in parallel to increase the load. electrolytic capacitor between Vin and Gnd. The values suggested are as shown in Table 1. If additional filtering is - Input Regulation required, the capacitance may be increased, or expanded to This converter accepts a narrow input range. an LC network as shown in Figure 1. With a semi-regulated design, the converter’s output voltage will also change proportionally with the input voltage. To accept a wider input range and to improve line regulation, an TABLE 1 input regulator can be added as shown in Fig. 2 Input Voltage External Input Capacitance +Vin +Vout REG DC DC 3.3, 5 V 4.7 μF 12 V 2.2 μF 15 V 2.2 μF The converter has minimal protection against input over- 24 V 1.0 μF voltage or output over-load, and may be permanently damaged -Vin -Vout - Protection if exposed to these conditions. An input clamping device can be used for input voltage limiting. An input fuse or an output - Output filtering fuse also be used to protect against over-loading. An output capacitor is needed to meet output ripple requirements as shown in Table 2.Output capacitance may be - Dual outputs used as a single output increased for additional filtering, but should not exeed 10μF or The +Vout and -Vout can be used to obtain a single output expanded to an LC network as in Figure 1. that is the sum of the two outputs. In this case, the COM pin shouldn’t be used. TABLE 2 - Output Regulation Vout External Ouput Capacitance 3.3, 5 V 4.7 μF 9V 2.2 μF 12 V 1.0 μF 15 V 0.47 μF 24 V 0.33 μF An external 3-terminal regulator can be connected to the output of the converter to achieve full regulation. Make sure the converter’s output voltage 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. REG +Vin L +Vout +Vin C DC DC -Vin -Vin -Vout C -Vout +Vout DC DC L 3 <Figure 1> 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.v-infinity.com