NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output xRAH-12Fxx0 Series RoHS Compliant • Non-Isolated • OCP/SCP • Fixed frequency (300 kHz) • Trim function (Option) • Low profile package (7.82 mm) • Remote On/Off • Under-voltage lockout (UVLO) • Remote Sense (SMD module) Description The Bel xRAH-12Fxx0 series are part of the low cost non-isolated dc/dc converter series. These converters are available in a range of output voltages from 1.0 V to 3.3 V. It is packaged in a compact, overmolded package rated at 12 A. The output is closely regulated and the efficiency of 3.3 V output module is typically 93% at full load. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection. Part Selection Output Voltage 3.3 V Input Voltage 4.5 V - 5.5 V Max. Output Current 12 A Max. Output Power 39.6 W Typical Efficiency 93% Part Number Surface Mount SRAH-12F330 Part Number Vertical Mount VRAH-12F330 2.5 V 3.6 V - 5.5 V 12 A 30.0 W 89% SRAH-12F250 VRAH-12F250 1.8 V 3.0 V - 5.5 V 12 A 21.6 W 87% SRAH-12F180 VRAH-12F180 1.5 V 3.0 V - 5.5 V 12 A 18.0 W 84% SRAH-12F150 VRAH-12F150 1.2 V 3.0 V - 5.5 V 12 A 14.4 W 82% SRAH-12F120 VRAH-12F120 1.0 V 3.0 V - 5.5 V 12 A 12.0 W 80% SRAH-12F100 VRAH-12F100 Note: Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel Packaging”, and “G” for “Tray Packaging”. Absolute Maximum Ratings Parameter Input Voltage (continuous) Min -0.3 V Typ - Max 6V Output Enable Terminal Voltage -0.3 V - 7V Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Notes Input Specifications Parameter Min Typ Max 4.5 V 3.6 V 3.0 V - 120 mA 5.5 V 5.5 V 5.5 V 200 mA - 2 mA 11 A 10.5 A 9.0 A 8.1 A 6.5 A 5.2 A 5 mA Notes Input Voltage VO=3.3 V VO=2.5 V VO=1.8-1.0 V Input Current (no load) Input Current (full load) VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V Remote Off Input Current Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output Input Specifications (continued) Parameter Min Typ Max Input Reflected Ripple Current (pk-pk) - 260 mA 320 mA Input Reflected Ripple Current (rms) - 75 mA 120 mA - 0.09 A s 2.1 V 2V 2 0.2 A s 2.4 V 2 I t Inrush Current Transient Turn on Voltage Threshold Turn off Voltage Threshold - 2 Notes With simulated source impedance of 500 nH, 5 Hz to 20 MHz; use a 270 uF/6.3 V cap with ESR=0.03 ohm max at 100 kHz Note: All specifications are typical at 25 °C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Min Typ Max VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V 3.234 V 2.450 V 1.764 V 1.470 V 1.176 V 0.980 V - 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V 1.0 V ±1 mV ±2 mV 3.366 V 2.550 V 1.836 V 1.530 V 1.224 V 1.020 V ±4 mV ±5 mV VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V 0A 20 A - ±10 mV ±9 mV ±7 mV ±6 mV ±5 mV ±4 mV 2 0.3 A s ±15 mV ±13 mV ±12 mV ±11 mV ±10 mV ±9 mV 12 A 30 A 2 0.6 A s Ripple and Noise (rms) - 12 mV 21 mV Ripple and Noise (pk-pk) - 50 mV 90 mV 330 uF 5 mS 0% - 10 mS 3% 4800 uF - 110 mV 40 uS 110 mV 40 uS 100 mV 30 uS 100 mV 30 uS 90 mV 20 uS 90 mV 20 uS 150 mV 80 uS 150 mV 80 uS 150 mV 60 uS 150 mV 60 uS 130 mV 40 uS 130 mV 40 uS Line Regulation Load Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Current Limit Threshold Short Circuit Surge Transient Turn on Time Overshoot at Turn on Output Capacitance Transient Response Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time VO=3.3 V VO=2.5 V VO=1.0 V 1.8 V Notes Test conditions: Vin=5 V, Io= 50% load Test conditions: 0-20 MHz BW; 1 uF ceramic capacitor and 330 uF external capacitor at the output. Test conditions: di/dt=0.5A/us, Vin=5V, with 330uF external load capacitance. Note: All specifications are typical at 5 V input, full load at 25 °C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output General Specifications Parameter Min Typ Max VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V 90% 86% 84% 81% 79% 77% 93% 89% 87% 84% 82% 80% - VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V 85% 81% 79% 76% 88% 84% 82% 79% - Switching Frequency 250 kHz 300 kHz 350 kHz Output Trim Range 90%VO - 110%VO - - 10% Notes Efficiency Vin=5 V, full load Efficiency Remote Sense Compensation MTBF SMD module Calculated Per Bell Core SR-332 (IO = 9.6 A, Vin=5 V; Ta = 25 °C) 4,038,174 hours Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Vin=3.3 V, full load 0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.128 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 Weight - 5.1 g - Control Specifications Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Min Typ Max - - 0.9 V (Vin=3.0 V) - - 1.35 V (Vin=4.5 V) - - 1.65 V (Vin=5.5 V) 2.1 V (Vin=3.0 V) - - 3.15 V (Vin=4.5 V) - - 3.85 V (Vin=5.5 V) - - Notes Remote on/off pin open, unit on. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output Output Trim Equations Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the resistors should be used for any given application. RTrimDown = Vout A −B Vnom − Vadj Rtrimdown Module Trim GND RTrimUp = Vadj Vout C −D − Vnom Module Trim Rtrimup GND Vnom A B C D 3.3 161.391 161.900 43.330 100.000 2.5 111.674 208.900 43.330 147.000 1.8 68.576 287.900 43.330 226.000 1.5 50.000 287.900 43.330 226.000 1.2 31.240 208.900 43.330 147.000 1.0 18.850 161.900 43.330 100.000 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output Efficiency Data Efficiency Curve Efficiency Curve 98.00% 94.00% 96.00% 94.00% 92.00% 90.00% 88.00% 4.5 V 5.0 V 5.5 V 90.00% 88.00% 86.00% Efficiency Efficiency 92.00% 86.00% 3.6 V 4.5 V 5.5 V 84.00% 82.00% 84.00% 80.00% 82.00% 80.00% 78.00% 76.00% 78.00% 74.00% 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 Output Current (A) xRAH-12F330 8 9 10 11 12 Efficiency Curve 94.00% 92.00% 90.00% 88.00% 86.00% 84.00% 82.00% 80.00% 78.00% 76.00% 74.00% 72.00% 70.00% 3.0 V 3.3 V 5.0 V 5.5 V 88.00% 86.00% 84.00% Efficiency Efficiency 7 92.00% 90.00% 3.0 V 3.3 V 5.0 V 5.5 V 82.00% 80.00% 78.00% 76.00% 74.00% 72.00% 70.00% 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 Output Current (A) 5 5 6 7 8 Output Current (A) xRAH-12F120 9 10 11 12 Efficiency 3.0 V 3.3 V 5.0 V 5.5 V 4 8 9 10 11 12 Efficiency Curve 92.00% 90.00% 88.00% 86.00% 84.00% 82.00% 80.00% 78.00% 76.00% 74.00% 72.00% 70.00% 3 7 xRAH-12F150 Efficiency Curve 2 6 Output Current (A) xRAH-12F180 Efficiency 6 xRAH-12F250 Efficiency Curve 1 5 Output Current (A) 90.00% 88.00% 86.00% 84.00% 82.00% 80.00% 78.00% 76.00% 74.00% 72.00% 70.00% 68.00% 3.0 V 3.3 V 5.0 V 5.5 V 1 2 3 4 5 6 7 8 9 10 11 12 Output Current (A) xRAH-12F100 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output Thermal Derating Curves SRAH-12F330 SRAH-12F250 SRAH-12F180 VRAH-12F330 VRAH-12F250 VRAH-12F180 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output Thermal Derating Curves (continued) SRAH-12F150 VRAH-12F150 SRAH-12F120 VRAH-12F120 SRAH-12F100 VRAH-12F100 Test Condition: Derating curves are tested at 5 V input. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output Mechanical Outline SRAH-12Fxx0 Pin Connections bel Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) 6 Remote Sense (option) 7 N/A Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 V-5.5 V Input 1.0 V-3.3 V/12 A Output Mechanical Outline (continued) VRAH-12Fxx0 bel bel Pin Connections Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 Trim (option) RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. These parts are not however compatible with the higher temperatures associated with lead free solder processes and must be soldered using a reflow profile with a peak temperature of no more than 240 ºC. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 112305 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com Bel Fuse Ltd. 8F/ 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com