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| SC20A SERIES HDLV Family Description The SC20A is a low-cost, 20-Amp, non-isolated DC-DC converter with an amazingly small footprint of only 0.8 in2. Designed for today's high power microprocessors, the SC20A accepts either 5 V or 3.3 V inputs and offers outputs from 1.3 V to 3.3 V. The SC20A also uses an industrystandard pin-out making it easy to increase power in existing designs. Using Bourns Switch Power's proprietary V2TM architecture, the SC20A provides ultrafast transient response, improved line and load regulation, and very high efficiency. It also incorporates short-circuit protection, Enable / Disable control, output voltage trim, and remote sense. Features * Low Cost * 20-Amp Output Current * 90 % Efficiency * Industry-standard Pin-out * Low 0.6 " Profile * Nonisolated Output * Remote Sense * Trim Function * Enable / Disable * Short-circuit Protection with auto-restart * Fast Transient Response * High-temperature Operation * Output Precharge Capability Input Voltage Current Control Voltage High = Disable Low = Enable E/D Current Common Specifications Min 4.5 3.0 Nom 5 3.3 Max 5.5 3.6 20 Units Vdc Vdc A Vdc Vdc mA Notes 4.75 Vin Startup 2.4 0.4 1 Source 500 mA Open=Enable Output Current Voltage Setpoint Accuracy Voltage Trim Range Line Regulation Load Regulation Current Limit Dynamic Response 0 to 20 A load 20 to 0 A load Temperature Regulation -10 0.1 0.3 25 200 19 200 19 20 2 +10 22 34 A %Vnom %Vnom %Vnom %Vnom A mV i/t = 3 A/s s mV i/t = 3 A/s s 0.02 %Vout/C Patents 5,770,940 5,978,195 6,127,814 General MTBF Operating Temperature Storage Temperature Switching Frequency 1,000 -25 -40 -40 200 85 85 125 400 300 kHrs C C C kHz Bellcore TR332, 25 C optional Asia-Pacific: TEL +886- (0)2 25624117 * FAX +886- (0)2 25624116 Europe: TEL +41-41 768 5555 * FAX +41-41 768 5510 The Americas: TEL +1-951 781 5500 * FAX +1-951 781-5700 Reliable Electronic Solutions www.bourns.com Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. SC20A SERIES Electrical Specifications Nominal Output Output Input Voltage Current (V) (V) (A) SC20A-5S3.3 SC20A-5S2.5 SC20A-5S1.9 SC20A-5S1.8 SC20A-5S1.5 SC20A-3S2.5 SC20A-3S1.9 SC20A-3S1.8 SC20A-3S1.5 5 5 5 5 5 3.3 3.3 3.3 3.3 3.3 2.5 1.9 1.8 1.5 2.5 1.9 1.8 1.5 20 20 20 20 20 20 20 20 20 Short-circuit Current (A) typ 27 27 27 27 27 27 27 27 27 Noise (mV pp) typ 100 100 100 100 100 100 100 100 100 HDLV Family Efficiency (%) typ 89 92 Standard Options Add option designators to the end of the part number. Example; SC20A-5S3.3-B Option Description B No Remote Sense option removes sense pin F 1 % Setpoint Accuracy Z -40 C Operation X Modified pin length followed by three digits (in mils) 0.83 (21.08) 0.45 (11.43) 0.123 (3.12) 3.00 (76.2) 0.60 (15.24) 1234 5 0.24 (6.1) 0.65 (16.51) 0.100 (2.54) 1.400 (35.56) 1.800 (45.72) 0.012 (0.30) typ pin thickness inches (mm) 0.xx 0.01 inches 0.xxx 0.005 inches 6 7 8 910 0.135 0.015 (3.43 0.38) 0.020 (0.51) typ pin width Description Ground Vin Trim Enable Remote Sense - 3 10 Enable 9 Trim 5 6 Vin 7 - Vin 100 f/10 V 8 - Vin SC20A Vout - 1 Vout - 2 Vout - 4 Vout 100 f 10 V 0.37 max (9.4 max) Pin Pin Description 5,6 1,2,4 Vout 7,8 3 Remote Sense (Removed for B option) 9 10 Note: Component placement may change. Recommended keep-out area equals maximum length and width. Trim Up Trim Rup Gnd Trim Down Vout Rdown All outputs other than 1.5 V Vnom 8.09 Rup = -22 (in k) Vout - Vnom Trim up when Vnom = 1.5 V 3.176 -10 (in k) Vout - Vnom All outputs other than 1.5 V Vnom 6.04 Vout-8.09 -22 (in k) Rdown = Vnom - Vout Trim down when Vnom = 1.5V 2.37 Vout-3.176 -10 (in k) Vnom - Vout REV. 01/05 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. Rup = Rdown = |
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