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date 9/12/218 page 1 of 1 SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR FEATURES 1 A of output current efficiency up to SMT package industrial operating temp -~+ C designed to

1 date 9/12/218 page 1 of 1 SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR FEATURES 1 A of output current efficiency up to SMT package industrial operating temp -~+ C designed to meet IEC/EN industry standard footprint no load input current of.2 ma output short circuit protection on output MODEL typ (Vdc) input voltage 1 range (Vdc) output voltage (Vdc) output current max (ma) output power max (W) ripple & noise 2 efficiency 3 max (mvp-p) V78E1--SMT 12 4.~ V78E2--SMT 12 4.~ V78E3--SMT ~ V78E5--SMT 24 8~ V78E6--SMT 24 1~ V78E9--SMT 24 13~ V78E12--SMT 24 16~ Notes: 1. For input voltages higher than 3 Vdc, a 22 µf / V input capacitor is required. 2. Tested at nominal input, 2~ load, 2 Mhz bandwidth, with 1 µf electrolytic and 1 µf ceramic capacitor on the output. At loads below 2, the max ripple and noise will be 1 mvp-p. 3. Measured at min Vin, full load. 4. All specifications are measured at Ta=25 C, humidity <, nominal input voltage, and rated output load unless otherwise specified. PART NUMBER KEY typ () V78E XX--SMT-TR Base Number Output Voltage Output Current

2 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 2 of 1 INPUT operating input voltage Vdc filter input reverse polartiy protection capacitor filter no no-load input current.2 1. ma remote on/off 6 Note: OUTPUT 5. See Model section on page 1 for specific input voltage ranges. 6. The voltage of remote ON/OFF pin is relative to GND pin. turn on (3.2~5.5 Vdc or open circuit) turn off (<.8 Vdc) input current when switched off.2 1 ma maximum capacitive load 7 6 μf voltage accuracy line regulation load regulation at full load, input voltage range 1.5, 2.5, 3.3 Vdc output models all other models at full load, input voltage range 1.5, 2.5 Vdc output models all other models at 1~ load, input voltage range 1.5, 2.5 Vdc output models all other models voltage adjustment input voltage range ±1 Vo switching frequency at full load, input voltage range 1.5, 2.5 Vdc output models 3.3, 5, 6.5 Vdc output models all other models transient recovery time at nominal input voltage, 25 load step change.2 1 ms transient response deviation at nominal input voltage, 25 load step change 1 mv temperature coefficient operating temperature - C to + C ±.3 / C Note: 7. The maximum capacitive load was tested at nominal input voltage, full load. PROTECTIONS short circuit protection SAFETY AND COMPLIANCE continuous, auto recovery safety approvals conducted emissions radiated emissions ESD radiated immunity EFT/burst surge conducted immunity CE CISPR32/EN532, class B (external circuit required, see Figure 3-b) CISPR32/EN532, class B (external circuit required, see Figure 3-b) IEC/EN6-4-2, contact ± 4kV, class B IEC/EN6-4-3, 1V/m, class A ±2 ±2 ±.3 ±.2 ±.8 ± IEC/EN6-4-4, ± 1kV, class B (external circuit required, see Figure 3-a) IEC/EN6-4-5, line-line ± 1kV, class B (external circuit required, see Figure 3-a) IEC/EN6-4-6, 3 Vr.m.s, class A MTBF as per MIL-HDBK-217F, 25 C 2,, hours RoHS yes ±4 ±3 ±.6 ±.4 ±1.5 ±.6 khz khz khz

3 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 3 of 1 ENVIRONMENTAL operating temperature see derating curves - C storage temperature C storage humidity non-condensing 5 SOLDERABILITY reflow soldering see reflow profile, refer to IPC/JEDEC J-STD-2D C Peak Temp 245 C (Max) Temperature ( C) Sec Max (>217 C) MECHANICAL Time (sec) dimensions x 8. x 8.25 [. x.335 x.325 inch] mm case material black flame-retardant and heat resistant plastic (UL94V-) weight 1.7 g MECHANICAL DRAWING units: mm [inch] tolerance: ±.25[±.1] pin section tolerance: ±.1[±.4] PIN CONNECTIONS PIN FUNCTION 1 +VIN 2 +VIN 3 GND 4 +VOUT 5 +VOUT 6 V adj 7 GND 1 remote on/off Recommended PCB Layout Top View

4 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 4 of 1 DERATING CURVES Temperature Derating Curves 9 Vdc Output (Natural Convection) Temperature Derating Curves12 Vdc Output (Natural Convection) Load () 3 2 Vin 26 V 26<Vin 36 V Load () 3 2 Vin 26 V 26<Vin 36 V - Ambient Temperature ( C) Ambient Temperature ( C) 12 Temperature Derating Curves All Other Outputs (Natural Convection) 12 Load () 3 2 Vin 26 V 26<Vin 36 V EFFICIENCY CURVES - 45 Ambient Temperature ( C) V78E1--SMT Efficiency Curve V78E1--SMT Efficiency Curve

5 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 5 of 1 EFFICIENCY CURVES (CONTINUED) V78E2--SMT Efficiency Curve V78E2--SMT Efficiency Curve V78E3--SMT Efficiency Curve V78E3--SMT Efficiency Curve V78E5--SMT Efficiency Curve V78E5--SMT Efficiency Curve

6 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 6 of 1 EFFICIENCY CURVES (CONTINUED) V78E6--SMT Efficiency Curve V78E6--SMT Efficiency Curve V78E9--SMT Efficiency Curve V78E9--SMT Efficiency Curve V78E12--SMT Efficiency Curve V78E12--SMT Efficiency Curve

7 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 7 of 1 TYPICAL APPLICATION CIRCUIT Figure 1 Application Circuit Figure 2 LC Filter Application Circuit Table 1 Model Number C1 (ceramic capacitor) C2 (ceramic capacitor) V78E1--SMT 1 μf/ V 22 μf/1 V V78E2--SMT 1 μf/ V 22 μf/1 V V78E3--SMT 1 μf/ V 22 μf/1 V V78E5--SMT 1 μf/ V 22 μf/16 V V78E6--SMT 1 μf/ V 22 μf/16 V V78E9--SMT 1 μf/ V 22 μf/16 V V78E12--SMT 1 μf/ V 22 μf/25 V Ra1/Ra2 (Vadj resistance) refer to Vadj resistance calculation EMC RECOMMENDED CIRCUIT Figure 3 Table 2 Recommended external circuit components FUSE choose according to actual input current MOV S2K3 LDM1 82 µh C 6 µf/ V C1, C2 refer to table 1 C5 4.7 µf/ V LDM2 68 µh Note: 8. C1 & C2 are required and should be connected as close to the module pins as possible. 9. C1 & C2 can be increased as needed and the use of tantalum or low ESR electrolytic capacitors would be recommended. 1. To reduce the output ripple further, it is recommended to add an LC filter at the output (see figure 2) with a 1~47 µh L component.

8 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 8 of 1 APPLICATION NOTES 1. Output voltage trimming Leave open if not used. Figure 4 Application Circuit for Trim pin (part in broken line is the interior of models) Formula for Trim Resistor Vo Vo up: R = ar2 a2 -R3 a= R-a 2 Vref Vo -Vref R1 R1 Vre f R2 R3 Ra2 Va dj R1 Vref R2 R3 Ra1 Va dj ar1 Vo -Vref down: R a1= -R3 a= R2 R-a 1 Vref Note: Value for R1, R2, R3, and Vref refer to Table 3 Ra1/Ra2: Trim Resistor a: User-defined parameter, no actual meanings Vo': The trim up/down voltage V V Table 3 Va dj up Va dj down Vout (Vdc) R1 (kω) R2 (kω) R3 (kω) Vref (V) Note: 11. The 1.5 Vdc output model can only be adjusted up.

9 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 9 of 1 PACKAGING units: mm Reel Size: Ø33 mm Reel QTY: 3 pcs per tray Carton Box Size: x 3 x 2 mm Carton Box QTY: 1, pcs per carton box

10 CUI Inc SERIES: V78E--SMT DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR date 9/12/218 page 1 of 1 REVISION HISTORY rev. description date 1. initial release 9/12/218 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 2 SW 112th Ave. Tualatin, OR Fax techsupport@ 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.

For more information, please visit the product page If your application requires forced air, view our Dc Fans. output. output current max (ma)

For more information, please visit the product page If your application requires forced air, view our Dc Fans. output. output current max (ma) date 12/08/2017 page 1 of 10 SERIES: PBO-1 DESCRIPTION: AC-DC POWER SUPPLY FEATURES up to 1 W continuous power ultra-compact SIP package available in straight-pin and bent-pin configurations wide input