Additional Resources: Product Page 3D Model PCB Footprint date 09/20/2021 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 -40C to +85C temperature range 2 input output output output ripple efficiency MODEL 1 voltage voltage current power & noise 3 typ range min max max typ typ (Vdc) (Vdc) (Vdc) (mA) (mA) (W) (mVp-p) (%) 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. At full load, nominal input, 20 MHz bandwidth oscilloscope. 2. At min Vin. 3. Operation under minimum load will not affect the reliability of the converter however, the ripple and noise may exceed the specified values. 4. All specifications measured at: Ta=25C, nominal input voltage, rated output load, and after warm up unless otherwise specified. PART NUMBER KEY P78A XX - 0500 Base Number Output Current Output Voltage cui.comAdditional Resources: Product Page 3D Model PCB Footprint CUI Inc SERIES: P78A-0500 DESCRIPTION: DC-DC CONVERTER date 09/20/2021 page 2 of 7 INPUT parameter conditions/description min typ max units 3.3 Vdc model 6 24 28 Vdc operating input voltage 5 Vdc model 7 24 28 Vdc no load input current 1.5 mA OUTPUT parameter conditions/description min typ max units 1 maximum capacitive load 220 F line regulation measured from low to high line, full load 0.5 % load regulation measured from 10~100% load 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 min typ max units short circuit protection continuous, auto recovery SAFETY AND COMPLIANCE parameter conditions/description min typ max units 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) as per MIL-HDBK-217F, full load, 25 C 4,185,000 hours MTBF as per MIL-HDBK-217F, full load, 85 C 2,182,000 hours RoHS 2011/65/EU ENVIRONMENTAL parameter conditions/description min typ max units operating temperature see derating curve -40 85 C storage temperature -55 125 C vibration 10~55 Hz, 30 minutes along each axis 2 G SOLDERABILITY parameter conditions/description min typ max units wave soldering see wave solder profile 260 C Note: 2. The wave solder profile is measured on lead temperature. 3. Need to keep the solder parts internal temperature less than about 210C. cui.com