NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 5.5 Vdc Input xRAH-12F1A0 0.8 Vdc - 3.63 Vdc/12 A Output RoHS Compliant Rev.A • Non-Isolated • OCP/SCP • Wide Trim • Remote On/Off • Fixed Frequency (300 kHz) • Under Voltage Lockout (UVLO) • Remote Sense (SMD Module) • UL60950-1 Recognized (UL/cUL) Description The Bel xRAH-12F1A0 modules are a series of non-isolated, step down dc/dc power converters that operate from 3.0 Vdc to 5.5 Vdc source. These converters are available in a range of output voltages from 0.8 Vdc to 3.63 Vdc. It is packaged in a compact, overmolded package rated at 12 A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. The output is closely regulated and the efficiency is typically 94% at 3.3 Vdc output full load. Part Selection Output Voltage Input Voltage 0.9 Vdc - 3.3 Vdc 3.0 Vdc - 5.5 Vdc Max. Output Current 12 A Max. Output Power 39.6 W Typical Efficiency 94% Part Number Surface Mount SRAH-12F1A0 Part Number Vertical Mount VRAH-12F1A0 Notes: 1. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel Packaging”, and “G” for “Tray Packaging”. 2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. Absolute Maximum Ratings Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 °C -55 °C Typ - Max 6V 6V 85 °C 125 °C Notes Input Specifications Parameter Input Voltage Input Current (no load) Input Current (full load) Min 3V - Typ 100 mA Max 5.5 V 150 mA Remote Off Input Current - 4 mA 11 A 10.5 A 9.0 A 8.1 A 6.5 A 5.2 A 8 mA Input Reflected Ripple Current (pk-pk) - 250 mA 400 mA Input Reflected Ripple Current (rms) - 80 mA 120 mA - 2 0.2 A s - VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 2 I t Inrush Current Transient Turn on Voltage Threshold Turn off Voltage Threshold - 0.09 A s 2.1 V 2V Notes With simulated source impedance of 500 nH, 5 Hz to 20 MHz; use a 270 uF/16 V cap with ESR=0.0018 ohm max at 100 kHz 2 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Output Specifications Parameter Output Voltage Set Point VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Line Regulation Min Typ Max 3.234 V 2.45 V 1.764 V 1.47 V 1.176 V 0.882 V - 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V 0.9 V ±3 mV 3.366 V 2.55 V 1.836 V 1.53 V 1.224 V 0.981 V ±6 mV - ±4 mV ±8 mV - ±10 mV ±20 mV 12 A Load Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current 0A - Current Limit Threshold 15 A - 2 - 0.3 A s 0.6 A s Ripple and Noise (rms) - 15 mV 25 mV Ripple and Noise (pk-pk) - 50 mV 100 mV Turn on Time - 5 mS 10 mS Overshoot at Turn on - 0% 3% 330 uF - 4800 uF - 150 mV 30 uS 150 mV 30 uS 250 mV 60 uS 250 mV 60 uS All Vin=5 V, Io= 50% load 30 A 2 Short Circuit Surge Transient Output Capacitance Transient Response Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time Notes Test conditions: 0-20 MHz BW; 1 uF ceramic capacitor and 10 uF aluminum capacitor at the output. Test conditions: di/dt=0.5 A/us, Vin=5 V, with 330 uF external load capacitance. Note: All specifications are typical at 5 V input, full load at 25 °C unless otherwise stated. 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=0.9 V 91% 89% 87% 85% 83% 81% 94% 92% 90% 88% 86% 84% - VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Switching Frequency 87% 85% 83% 81% 250 kHz 90% 88% 86% 84% 300 kHz 350 kHz Output Trim Range 90%VO - 403%VO 90%Vo - 110%Vo - - 0.2 V Notes Efficiency Vin=5 V, full load Efficiency Remote Sense Compensation MTBF 7,501,004 hours Vin=3.3 V, full load Wide Trim Narrow Trim SMD module Calculated Per Bell Core SR-332 (Vin=5 V; Vo=1.8 V; IO = 9.6 A; Ta = 25 °C) 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output General Specifications (continued) Parameter Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight Min Typ Max Notes 0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.13 - 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 6g - Control Specifications Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Min Typ Max -0.3 V 2.2 V - 0.8 V 5.5 V Notes Remote on/off pin open, unit on. Output Trim Equations Equations for calculating the trim resistor given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vo) 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. Vout Rtrim _ down = ( 2.0058 − 10.197) Kohm Vo − Vo, adj Rtrim-down Module Trim GND Rtrim _ up = ( 7.007 − 0.187) Kohm Vo, adj − Vo Vout Module Note: Vo=0.9 V. Trim Rtrim-up GND Thermal Derating Curve 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Efficiency Data Efficiency Curve 100.0% 100.0% 95.0% 95.0% 90.0% 90.0% 85.0% 4.5 V 5.0 V 5.5 V 80.0% 75.0% Efficiency Efficiency Efficiency Curve 85.0% 3.6 V 5.0 V 5.5 V 80.0% 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 60.0% 1.2 3.0 6.0 9.0 1.2 12.0 3.0 Vo=3.3 V Vo=2.5 V Efficiency Curve Efficiency Curve 100.0% 100.0% 95.0% 95.0% 9.0 12.0 90.0% 3.0 V 3.3 V 5.0 V 5.5 V 85.0% 80.0% 75.0% Efficiency Efficiency 90.0% 3.0 V 3.3 V 5.0 V 5.5 V 85.0% 80.0% 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 60.0% 1.2 3.0 6.0 9.0 1.2 12.0 3.0 6.0 Output Current (A) Output Current (A) Vo=1.8 V Vo=1.5 V Efficiency Curve Efficiency Curve 100.0% 100.0% 95.0% 95.0% 9.0 12.0 90.0% 3.0 V 3.3 V 5.0 V 5.5 V 85.0% 80.0% 75.0% Efficiency 90.0% Efficiency 6.0 Output Current (A) Output Current (A) 80.0% 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 3.0 V 3.3 V 5.0 V 5.5 V 85.0% 60.0% 1.2 3.0 6.0 9.0 12.0 1.2 3.0 6.0 Output Current (A) Output Current (A) Vo=1.2 V Vo=0.9 V 9.0 12.0 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Ripple and Noise Waveforms Ripple and noise at max load Vin=5 V, Vo=3.3 V Ripple and noise at max load Vin=5 V, Vo=2.5 V Ripple and noise at max load Vin=3.3 V, Vo=1.8 V Ripple and noise at max load Vin=5 V, Vo=1.8 V Ripple and noise at max load Vin=3.3 V, Vo=1.5 V Ripple and noise at max load Vin=5 V, Vo=1.5 V 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Ripple and Noise Waveforms (continued) Ripple and noise at max load Vin=3.3 V, Vo=1.2 V Ripple and noise at max load Vin=3.3 V, Vo=0.9 V Ripple and noise at max load Vin=5 V, Vo=1.2 V Ripple and noise at max load Vin=5 V, Vo=0.9 V Note: Ripple and Noise with a 10 uF aluminum cap and 1 uF ceramic cap at the output, Ta=25 deg C. Transient Response Waveforms Transients 50% to 100% load Vin=5 V, Vo=3.3 V Transients 100% to 50% load Vin=5 V, Vo=3.3 V 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Transient Response Waveforms (continued) Transients 50% to 100% load Vin=5 V, Vo=2.5 V Transients 50% to 100% load Vin=3.3 V, Vo=1.8 V Transients 50% to 100% load Vin=5 V, Vo=1.8 V Transients 100% to 50% load Vin=5 V, Vo=2.5 V Transients 100% to 50% load Vin=3.3 V, Vo=1.8 V Transients 100% to 50% load Vin=5 V, Vo=1.8 V 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Transient Response Waveforms (continued) Transients 50% to 100% load Vin=3.3 V, Vo=1.5 V Transients 50% to 100% load Vin=5 V, Vo=1.5 V Transients 50% to 100% load Vin=3.3 V, Vo=1.2 V Transients 100% to 50% load Vin=3.3 V, Vo=1.5 V Transients 100% to 50% load Vin=5 V, Vo=1.5 V Transients 100% to 50% load Vin=3.3 V, Vo=1.2 V 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Transient Response Waveforms (continued) Transients 50% to 100% load Vin=5 V, Vo=1.2 V Transients 50% to 100% load Vin=3.3 V, Vo=0.9 V Transients 50% to 100% load Vin=5 V, Vo=0.9 V Transients 100% to 50% load Vin=5 V, Vo=1.2 V Transients 100% to 50% load Vin=3.3 V, Vo=0.9 V Transients 100% to 50% load Vin=5 V, Vo=0.9 V Note: Transient response at di/dt=0.5 A/uS, 1 uF ceramic cap and 330 uF aluminum cap at the output, Ta=25 deg C. 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 Vdc - 5.5 Vdc Input 0.8 Vdc - 3.63 Vdc/12 A Output Mechanical Outline SRAH-12F1A0 Pin Connections bel VRAH-12F1A0 Pin 1 2 3 4 5 6 7 Function Remote On/Off (option) Vin Ground Vout Trim (option) Sense (option) N/A Pin Connections bel bel 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. ©2007 Bel Fuse Inc. Specifications subject to change without notice. 010507 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