PL IA NT Features CO M ■ *R oH S ■ ■ ■ ■ ■ Industry standard SMT package Output voltage programmable from 0.75 Vdc to 5.5 Vdc via external resistor 3 A output current Up to 95 % efficiency Small size, low profile Cost-efficient ■ ■ ■ ■ Low output ripple and noise High reliability Remote on/off Output overcurrent protection (non-latching) MX3A-12SA(-P) SMT Non-Isolated Power Module Description Bourns® MX3A-12SA(-P) is a non-isolated DC-DC converter offering designers a cost and space-efficient solution with standard features such as remote on/off, precisely regulated programmable output voltage and overcurrent protection. Specifications Parameter Min. Nom. Max. Units Notes 8.3 12 14 Vdc 18 V max. for -W version 2.0 Adc 2.4 0.4 Vin Vdc Vdc 0.75 5.5 Current 0.0 3.0 Vdc Adc Voltage Setpoint Accuracy -2.5 2.5 % Vo,set INPUT Voltage Current Remote ON/OFF: Low or Open = High = Standard On Off -P Option Off On 10 µA max. 1 mA max. OUTPUT Voltage Adjustment Range Line Regulation 0.3 % Vo,set Load Regulation 0.4 Temperature Regulation 0.4 % Vo,set % Vo,set 0 to +85 °C Ripple (pk-pk) (20 MHz Bandwidth) 30 50 mVpk-pk 1 µF ceramic//10 µF tantalum capacitors 15 mVrms 1 µF ceramic//10 µF tantalum capacitors 1 µF ceramic//10 µF tantalum capacitors Ripple (rms) 10 Dynamic Load Response: 50 % to 100 % Load or 100 % to 50 % Load; (∆i/∆t = 2.5 A/µs; 25 °C) 200 25 mV µs 50 % to 100 % Load or 100 % to 50 % Load; (∆i/∆t = 2.5 A/µs; 25 °C) 75 100 mV µs 13,000 kHrs 2 x 100 µF polymer capacitors GENERAL MTBF Operating Temperature -40 +85 °C Storage Temperature -55 +125 °C Switching Frequency 300 kHz Efficiency 86.0 % Vo,set = 1.2 Vdc 88.0 % 90.0 % Vo,set = 1.5 Vdc Vo,set = 1.8 Vdc 91.0 % Vo,set = 2.5 Vdc 93.0 % Vo,set = 3.3 Vdc 95.0 % Vo,set = 5.0 Vdc (Vin = 12 Vdc, TA= 25 °C, Full Load) Applications ■ ■ ■ Intermediate Bus architecture Distributed power applications Workstations and servers ■ ■ ■ Telecom equipment Enterprise networks including LANs/WANs Latest generation ICs (DSP, FPGA, ASIC) and microprocessor powered applications *RoHS Directive 2002/95/EC Jan 27 2003 including Annex. Specifications are subject to change without notice. Customers should verify device performance in their specific applications. Output Voltage Programming Via external trim resistor between Trim and GND: Rtrim = [ Via application of external voltage between Trim and GND: ] 10.5 - 1.0 kΩ Vo - 0.7525 Vtrim = (0.7 - 0.0667 x {Vo - 0.7525}) MX3A-12SA(-P) SMT Non-Isolated Power Module Product Dimensions Recommended Pad Layout BOTTOM VIEW 20.3 (0.80) 4.57 (0.180) 4.06 (0.160) 4.06 (0.160) VOUT 4.57 (0.180) 4.83 (0.190) GND TRIM VOUT 1.5 (0.06) 1.3 (0.05) ON/OFF 1.5 (0.06) 2.29 (0.090) TRIM 4.06 (0.160) 4.83 (0.190) GND 8.89 (0.350) ON/OFF 8.64 (0.340) VIN 17.53 (0.690) 8.64 (0.340) 11.43 (0.450) 8.89 (0.350) 1.47 (0.058) 4.06 (0.160) 0.25 (0.010) RECOMMENDED PAD SIZE: VIN 3.05 2.41 X MIN. (0.120) (0.095) 3.43 2.79 X MAX. (0.135) (0.110) Pick and Place Location 1.3 (0.05) 11.43 (0.450) SIDE VIEW 1.47 (0.058) DIMENSIONS: MM (INCHES) 6.18 (0.243) 4.32 (0.170) 9.63 (0.379) TOLERANCES: 0.5 (0.02) 0.25 DECIMAL .XX ± (0.010) 20.32 (0.800) L1 REF. DECIMAL .X ± How to Order M X 3A - 12 S A (-P) 6.80 (0.268) Configuration • M = Surface Mount Device Internal Identifier Derating Output Current vs. Local Ambient Temp & Airflow Output Current (Amps) Input Voltage (V) (Vin = 12 Vdc, Vo = 3.3 Vdc) Outputs • S = Single 3.5 Output Voltage (V) • A = Adjustable Output Current (A) 3.0 Optional Positive On/Off Logic 2.5 Fixed output voltage parts and optional features available; contact factory. NC (0 LFM) 2.0 1.5 1.0 0.5 0.0 25 30 35 40 45 50 55 60 65 70 Ambient Temperature (°C) 75 80 85 Asia-Pacific: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116 Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510 The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700 www.bourns.com REV. A 06/06 Specifications are subject to change without notice. Customers should verify device performance in their specific applications.