Additional Resources: Product Page 3D Model date 09/17/2021 page 1 of 7 SERIES: VX78-500-W DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR FEATURES low Profile pin-out compatible with linear regulators high efficiency up to 95% no-load input current as low as 0.2 mA wide temperature range: -40C ~ +85C support negative output output short circuit protection 3 input output output output ripple efficiency MODEL 1 2 voltage voltage current power & noise typ range max max max typ (Vdc) (Vdc) (Vdc) (mA) (W) (mVp-p) (%) VX7803-500-W 24 4.75~36 3.3 500 1.65 75 86 24 6.5~36 5 500 2.5 75 90 VX7805-500-W 12 7~31 -5 -300 1.5 75 80 VX7809-500-W 24 12~36 9 500 4.5 75 93 24 15~36 12 500 6 75 94 VX7812-500-W 12 8~24 -12 -150 1.8 75 84 24 19~36 15 500 7.5 75 95 VX7815-500-W 12 8~21 -15 -150 2.25 75 85 Notes: 1. For input voltages higher than 30 Vdc, a 22 F / 50 V input capacitor is required. 2. Tested at nominal input, 10~100% load, 20 MHz bandwidth, with 10 F electrolytic and 1 F ceramic capacitor on the output. At loads below 10%, the max ripple and noise of the 3.3 & 5 Vdc outputs will be 150 mVp-p, and the other outputs will be 2% Vo. 3. Measured at min Vin, full load. 4. All specifications are measured at Ta=25C, humidity < 75%, nominal input voltage, and rated output load unless otherwise specified. PART NUMBER KEY VX78 XX - 500 - W Base Number Output Current Output Voltage cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VX78-500-W DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 09/17/2021 page 2 of 7 INPUT parameter conditions/description min typ max units see Model section on page 1 for specific operating input voltage input voltage ranges filter capacitor filter input reverse polartiy protection no no-load input current positive outputs 0.2 1.5 mA OUTPUT parameter conditions/description min typ max units for positive output applications 680 F 2 maximum capacitive load for negative output applications 330 F at full load, input voltage range voltage accuracy 3.3 Vdc output model 2 4 % all other models 2 3 % line regulation at full load, input voltage range 0.2 0.4 % load regulation at nominal input, 10~100% load 0.4 1.5 % switching frequency at nominal input voltage, full load 550 850 kHz transient recovery time at nominal input voltage, 25% load step change 0.2 1 ms transient response deviation at nominal input voltage, 25% load step change 50 250 mV temperature coefficient at full load 0.03 %/C Note: 2. The maximum capacitive load was tested at nominal input voltage, full load. PROTECTIONS parameter conditions/description min typ max units short circuit protection continuous, auto recovery SAFETY AND COMPLIANCE parameter conditions/description min typ max units safety approvals EN62368-1 conducted emissions CISPR32/EN55032, class B (see Figure 5- for recommended circuit) radiated emissions CISPR32/EN55032, class B (see Figure 5- for recommended circuit) ESD IEC/EN61000-4-2, contact 4kV, perf. Criteria B radiated immunity IEC/EN61000-4-3, 10V/m, perf. Criteria A EFT/burst IEC/EN61000-4-4, 1kV, perf. Criteria B (see Figure 5- for recommended circuit) surge IEC/EN61000-4-5, line-line 1kV, perf. Criteria B (see Figure 5- for recommended circuit) conducted immunity IEC/EN61000-4-6, 3 Vr.m.s, perf. Criteria A MTBF as per MIL-HDBK-217F, 25C 2,000,000 hours RoHS 2011/65/EU cui.com