For more information, please visit the product page. date 05/25/2016 page 1 of 7 SERIES: P78A-0500 │ DESCRIPTION: DC-DC CONVERTER FEATURES • • • • • • • • • • up to 500 mA current output pin compatible with LM78XX linear regulators non-isolated switching regulator high start-up current capability wide input voltage range efficiency up to 95% low ripple and noise short circuit protection ultra-compact SIP3 package -40°C to +85°C temperature range MODEL input voltage output voltage output current output power ripple & noise1 efficiency2 typ (Vdc) range (Vdc) (Vdc) min3 (mA) max (mA) max (W) typ (mVp-p) typ (%) P78A03-0500 24 6~28 3.3 10 500 1.65 50 88 P78A05-0500 24 7~28 5 10 500 2.5 50 92 Notes: 1. 2. 3. 4. At full load, nominal input, 20 MHz bandwidth oscilloscope. At min Vin. Operation under minimum load will not affect the reliability of the converter; however, the ripple and noise may exceed the specified values. All specifications measured at: Ta=25°C, nominal input voltage, rated output load, and after warm up unless otherwise specified. PART NUMBER KEY P78A XX - 0500 Base Number Output Voltage cui.com Output Current For more information, please visit the product page. CUI Inc │ SERIES: P78A-0500 │ DESCRIPTION: DC-DC CONVERTER date 05/25/2016 │ page 2 of 7 INPUT parameter conditions/description operating input voltage 3.3 Vdc model 5 Vdc model min typ max units 6 7 24 24 28 28 Vdc Vdc no load input current 1.5 mA OUTPUT parameter conditions/description min typ maximum capacitive load 1 line regulation measured from low to high line, full load load regulation measured from 10~100% load max units 220 μF ±0.5 % ±1 % voltage accuracy ±3 % switching frequency 570 kHz Note: 1. Maximum capacitive load is tested at minimum input voltage and full load. PROTECTIONS parameter conditions/description short circuit protection continuous, auto recovery min typ max units min typ max units SAFETY AND COMPLIANCE parameter conditions/description conducted emissions EN55022, class A, class B (external circuit required, see Figure 2) radiated emissions EN55022, class A, class B (external circuit required, see Figure 2) MTBF as per MIL-HDBK-217F, full load, 25 °C as per MIL-HDBK-217F, full load, 85 °C RoHS 2011/65/EU 4,185,000 2,182,000 hours hours ENVIRONMENTAL parameter conditions/description min operating temperature see derating curve storage temperature vibration max units -40 85 °C -55 125 °C 10~55 Hz, 30 minutes along each axis typ 2 G SOLDERABILITY parameter conditions/description wave soldering see wave solder profile Note: min 2. The wave solder profile is measured on lead temperature. 3. Need to keep the solder parts internal temperature less than about 210°C. cui.com typ max units 260 °C For more information, please visit the product page. CUI Inc │ SERIES: P78A-0500 │ DESCRIPTION: DC-DC CONVERTER date 05/25/2016 │ page 3 of 7 MECHANICAL parameter conditions/description dimensions 11.6 x 8.5 x 10.4 min case material non-conductive black plastic (UL94V-0) potting material silicone (UL94V-0) typ max units mm weight 2 g MECHANICAL DRAWING units: mm tolerance: XX.X=±0.50 mm XX.XX=±0.25 mm 11.6 GND 3 -Vout 3.21 xxxx 0.5 Marking xxxx 1 2 3 0.25 Ø1.0 +0.15/-0 5.08 2.54 2 10.4 +Vin 4.10 Function 1 8.5 2.0 PIN 0.51 PIN CONNECTIONS 2.54 Recommended PCB Layout Top View cui.com For more information, please visit the product page. CUI Inc │ SERIES: P78A-0500 │ DESCRIPTION: DC-DC CONVERTER date 05/25/2016 │ page 4 of 7 DERATING CURVE Temperature Derating Curve Load (%) 100 80 60 Safe operating area 40 20 -40 -20 0 20 40 80 85 60 90 100 Ambient Temperature (°C) EFFICIENCY CURVES Efficiency vs. Load 5 Vdc output model 100 100 90 90 80 80 70 70 Efficiency (%) Efficiency (%) Efficiency vs. Load 3.3 Vdc output model 60 50 40 60 50 40 30 6 Vdc input 20 12 Vdc input 24 Vdc input 20 10 28 Vdc input 10 0 0 0.1 0.2 0.3 0.4 0.5 30 0.6 0 7 Vdc input 12 Vdc input 24 Vdc input 28 Vdc input 0 0.1 0.2 0.3 Output Current (A) Output Current (A) cui.com 0.4 0.5 For more information, please visit the product page. CUI Inc │ SERIES: P78A-0500 │ DESCRIPTION: DC-DC CONVERTER date 05/25/2016 │ page 5 of 7 APPLICATION CIRCUIT Figure 1 +VIN +VOUT C1 C2 GND GND Table 1 Optional External Components Notes: C1 10μF MLCC C2 10μF MLCC 1. The converter cannot be used as a positive to negative converter. EMC RECOMMENDED CIRCUIT EMC FILTERING Figure 2 L1 +VIN +VOUT C1 C2 GND GND Table 2 Table 3 EN55022 Class A Recommended External Circuit Components EN55022 Class B Recommended External Circuit Components C1 L1 C2 C1 L1 C2 1206 4.7μF, 50V MLCC 3.3μH NC 1210 10μF, 50V MLCC 10μH 1206 4.7μF, 50V MLCC cui.com For more information, please visit the product page. CUI Inc │ SERIES: P78A-0500 │ DESCRIPTION: DC-DC CONVERTER date 05/25/2016 │ page 6 of 7 PACKAGING units: mm Tube Size: 520 x 16.5 x 9.3 mm QTY: 42 pcs 16.5±0.5 12.1±0.5 9.3±0.5 0.5±0.2 4.9±0.5 cui.com For more information, please visit the product page. CUI Inc │ SERIES: P78A-0500 │ DESCRIPTION: DC-DC CONVERTER date 05/25/2016 │ page 7 of 7 REVISION HISTORY rev. 1.0 description date initial release 05/25/2016 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com [email protected] 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.