VPOL5A-12-SMT

Additional Resources: Product Page | 3D Model date 11/02/2021 page 1 of 11 SERIES: VPOL5A-12-SMT │ DESCRIPTION: POINT OF LOAD CONVERTER FEATURES • • • • • • • • • • industry standard pin out high efficiency to 92% 300 KHz switching frequency 8.3-14 VDC wide input range 0.75-5.0 VDC wide output range over temperature protection continuous short circuit protection remote on/off cost-efficient open frame design UL/C-UL 60950-1 (E222736) certified MODEL input voltage typ (Vdc) VPOL5A-12-SMT Notes: 12 range (Vdc) 8.3~14 output voltage output current output power ripple and noise1 efficiency (Vdc) max (A) max (W) max (mVp-p) typ (%) 5 3.75 6.0 7.5 9.0 10.0 12.5 16.5 25.0 50 50 50 50 50 50 50 75 73 80 82 84 85 87 89 92 0.75 1.2 1.5 1.8 2.0 2.5 3.3 5.0 1. Ripple and noise are measured at 20 MHz BW by “parallel cable” method with 1 µF ceramic and 10 µF electrolytic capacitors on the output. PART NUMBER KEY VPOL5A -12- XX - XX Base Number Input Voltage Output Voltage cui.com Packaging Style SMT Additional Resources: Product Page | 3D Model CUI Inc │ SERIES: VPOL5A-12-SMT │ DESCRIPTION: POINT OF LOAD CONVERTER date 11/02/2021 │ page 2 of 11 INPUT parameter conditions/description operating input voltage input under-voltage lockout turn-on voltage treshold turn-off voltage treshold lockout hysteresis voltage input current 0~14 Vdc no load input current 0.75 output 1.2 output 1.5 output 1.8 output 2.0 output 2.5 output 3.3 output 5.0 output off converter input current shutdown input idle current min typ max units 8.3 12 14.0 Vdc 8.0 7.9 0.1 3.5 20 25 25 30 30 35 45 50 inrush current input reflected-ripple current Vdc Vdc Vdc P-P thru 1µH inductor, 5Hz to 20MHz A mA mA mA mA mA mA mA mA 10 mA 0.1 A2s 150 mA OUTPUT parameter conditions/description min capacitive load low ESR output voltage set point at nominal input trim adjustment range selected by an external resistor line regulation low to high load regulation 10~100% load 0.7525 3,000 µF % 5.0 50% load step change % 5 A 200 mV 300 positive logic logic low (module off) logic high (module on) negative logic logic low (module off) logic high (module on) Vdc % ±0.5 0 kHz or open circuit 0 0.4 Vdc or open circuit 0 2.8 0.4 Vdc 1 mA 3.5 ms leakage current start-up time rise time temperature coefficient units ±0.2 switching frequency remote on/off max ±1.5 operating current range transient response deviation typ 3.5 -40~85°C ±0.03 ms %/°C PROTECTIONS parameter conditions/description short circuit protection continuous, hiccup min over temperature protection typ max 120 units °C SAFETY AND COMPLIANCE parameter conditions/description safety approvals 60950-1: UL/cUL MTBF as per MIL-HDBK-217F @ 25°C RoHS yes min 1,500,000 cui.com typ max units hours Additional Resources: Product Page | 3D Model CUI Inc │ SERIES: VPOL5A-12-SMT │ DESCRIPTION: POINT OF LOAD CONVERTER date 11/02/2021 │ page 3 of 11 ENVIRONMENTAL parameter conditions/description min max units operating temperature see derating curve -40 85 °C -55 125 °C storage temperature DERATING CURVES Figure 1 cui.com typ Additional Resources: Product Page | 3D Model CUI Inc │ SERIES: VPOL5A-12-SMT │ DESCRIPTION: POINT OF LOAD CONVERTER date 11/02/2021 │ page 4 of 11 MECHANICAL parameter conditions/description dimensions 22.9 x 10.16 x 5.6 (0.9 x 0.4 x 0.22 inch) min weight units: inches [mm] tolerance: x.xx ±0.02 [±0.5], x.xxx ±0.010 [0.25] PIN CONNECTIONS Function 1 +Vo 2 Trim 3 Common 4 +Vin 5 REM cui.com max units mm 2.3 MECHANICAL DRAWING Pin typ g Additional Resources: Product Page CUI Inc │ SERIES: VPOL5A-12-SMT │ DESCRIPTION: POINT OF LOAD CONVERTER EFFICIENCY CURVES cui.com | 3D Model date 11/02/2021 │ page 5 of 11 Additional Resources: Product Page CUI Inc │ SERIES: VPOL5A-12-SMT │ DESCRIPTION: POINT OF LOAD CONVERTER | 3D Model date 11/02/2021 │ page 6 of 11 THEORY OF OPERATION A block diagram of the VPOL5A-12-SMT series converter is shown in Figure 2. Extremely high efficiency power conversion is achieved through the use of synchronous rectification and drive techniques. Essentially, the powerful VPOL5A-12-SMT series topology is based on a non-isolated synchronous buck converter. The control loop is optimized for unconditional stability, fast transient response and a very tight line and load regulation. In a typical pre-bias application the VPOL5A-12-SMT series converters do not draw any reverse current at start-up. The output voltage can be adjusted from 0.75 to 5.0vdc, using the TRIM pin with a external resistor. The converter can be shut down via a remote ON/OFF input that is referenced to ground. This input is compatible with popular logic devices; a 'positive' logic input is supplied as standard. Positive logic implies that the converter is enabled if the remote ON/OFF input is high (or floating), and disabled if it is low. The converter is also protected against over-temperature conditions. If the converter is overloaded or the ambient temperature gets too high, the converter will shut down to protect the unit. Figure 2 cui.com Additional Resources: Product Page | 3D Model CUI Inc │ SERIES: VPOL5A-12-SMT │ DESCRIPTION: POINT OF LOAD CONVERTER date 11/02/2021 │ page 7 of 11 TYPICAL APPLICATION CIRCUITS The SMT converters must be must be connected to a low AC source impedance. To avoid problems with loop stability source inductance should be low. Also, the input capacitors should be placed close to the converter input pins to de-couple distribution inductance. However, the external input capacitors are chosen for suitable ripple handling capability. Low ESR polymers are a good choice. They have high capacitance, high ripple rating and low ESR (typical