NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 5.5 Vdc Input 0.9 Vdc - 3.3 Vdc/3 A Output xRAH-03F1A0 RoHS Compliant • Non-Isolated • Remote On/Off • High Efficiency • Input Under Voltage Lockout • Fixed Frequency (300 kHz) • OCP/SCP • Low Cost • Wide Range Trim • UL60950 Recognized (UL/cUL) Description The Bel xRAH-03F1A0 module is a non-isolated, step down dc/dc converter that operates from 3.0 Vdc to 5.5 Vdc source. This converter is available in a range of output voltages from 0.9 Vdc to 3.3 Vdc. It is packaged in a compact, overmolded package rated at 3 A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. The efficiency of 3.3 Vdc module is typically 92% at 5 Vdc input and full load. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection. Part Selection Output Voltage Input Voltage 0.9 Vdc - 3.3 Vdc 3.0 Vdc - 5.5 Vdc Max. Output Current 3A Max. Output Power 10 W Typical Efficiency 92% Part Number Surface Mount SRAH-03F1A0 Part Number Vertical Mount VRAH-03F1A0 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) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 °C -40 °C Typ - Max 6V 6V 85 °C 125 °C Notes Input Specifications Parameter Min Typ Max 4.5 V 3.6 V 3.0 V - - 5.5 V 5.5 V 5.5 V 70 mA Remote Off Input Current - 5 mA 2.5 A 2.4 A 2.2 A 1.9 A 1.6 A 1.3 A 10 mA Input Reflected Ripple Current (pk-pk) - 75 mA - Input Reflected Ripple Current (rms) - 25 mA - Notes Input Voltage VO=3.3 V VO=2.5 V VO=0.9 V-1.8 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=0.9 V Tested with simulated source impedance of 500 nH, 5 Hz to 20 MHz and two 270 uF/16 V Oscon caps with ESR=0.018 ohm max at 100 kHz 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 0.9 Vdc - 3.3 Vdc/3 A Output Input Specifications (continued) Parameter 2 I t Inrush Current Transient Min - Typ 2 0.004 A s Max 2 0.008 A s Turn on Voltage Threshold Turn off Voltage Threshold 2.2 V 2.4 V 2.9 V - Notes Only for 0.9 V-1.8 V output modules. Note: All specifications are typical at nominal input (5 V), full load at 25 °C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Min Typ Max Notes VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 3.217 V 2.437 V 1.755 V 1.462 V 1.170 V 0.877 V 3.3 V 2.5 V 1.8 V 1.5 V 1.2 V 0.9 V 3.383 V 2.563 V 1.845 V 1.538 V 1.230 V 0.923 V VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 10 mV 8 mV 6 mV 5 mV 4 mV 3 mV 20 mV 16 mV 12 mV 10 mV 8 mV 6 mV VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Regulation Over Temperature(-40 °C to +85 °C) VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Output Current Current Limit Threshold - 17 mV 13 mV 9 mV 8mV 6 mV 5 mV 33 mV 25 mV 18 mV 15 mV 12 mV 9 mV 0A 5A 72 mV 54 mV 39 mV 32 mV 26 mV 19 mV - 97 mV 72 mV 52 mV 43 mV 40 mV 40 mV 3A 12 A - 0.022 A s 0.044 A s VO=1.2 V-3.3 V VO=0.9 V - 15 mV 10 mV 25 mV 20 mV VO=1.2 V-3.3 V VO=0.9 V 0 uF 50 mV 40 mV 7 mS 0% - 70 mV 60 mV 12 mS 3% 1200 uF - 150 mV 20 uS 150 mV 20 uS 200 mV 40 uS 200 mV 40 uS Test conditions: Vin=5 V, Io=50% full load Line Regulation Load Regulation Short Circuit Surge Transient Ripple and Noise (rms) 2 2 Ripple and Noise (pk-pk) 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 All Test condition: 0-20 MHz BW Test conditions: di/dt = 0.5 A/uS; Vin = 5V Note: All specifications are typical at nominal 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 0.9 Vdc - 3.3 Vdc/3 A Output General Specifications Parameter Min Typ Max Notes 88% 86% 83% 80% 77% 75% 92% 90% 87% 84% 81% 79% - Switching Frequency 250 kHz 300 kHz 360 kHz Output Trim Range (wide trim) 100%Vo - 403%Vo Efficiency VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V Vo=0.9 V MTBF Measured at Vin=5 V, full load and Ta=25 °C Calculated Per Bell Core SR-332 (Vin= 5 V; Vo=3.3 V; IO = 80% load; Ta = 25 °C) 9,159,999 hours Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight Vo=0.9 V 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 - 5g - Control Specifications Parameter Remote On/Off Min Typ Max Signal Low (Unit Off) -0.3 V - 0.8 V Signal High (Unit On) 2.8 V - 6V 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 Up resistor should be connected between the Trim pin and Ground. Only one of the resistors should be used for any given application. Vout ⎛ ⎞ 3.712 Rtrim_ up = ⎜⎜ −1⎟⎟Kohm ⎝Vadj_ up −Vo ⎠ Module Trim Rtrim-up GND Note: Output voltage Vo=0.902V when Ttrim-up is not connected. 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 0.9 Vdc - 3.3 Vdc/3 A Output Efficiency Data Efficiency Curve Efficiency Curve 100.0% 100.0% 95.0% 90.0% Efficiency Efficiency 95.0% 4.5 V 5.0 V 5.5 V 85.0% 85.0% 3.6 V 5.0 V 5.5 V 80.0% 75.0% 80.0% 75.0% 0.30 90.0% 70.0% 0.75 1.50 2.25 65.0% 0.30 3.00 Output Current (A) 0.75 Efficiency Curve 95.0% 90.0% 90.0% 85.0% 3.0 V 3.3 V 5.0 V 5.5 V 80.0% 75.0% Efficiency Efficiency Efficiency Curve 70.0% 85.0% 3.0 V 3.3 V 5.0 V 5.5 V 80.0% 75.0% 70.0% 65.0% 65.0% 0.75 1.50 2.25 3.00 0.30 Output Current (A) 0.75 1.50 2.25 3.00 Output Current (A) Vo=1.8 V Vo=1.5 V Efficiency Curve Efficiency Curve 95.0% 90.0% 90.0% 85.0% 85.0% 3.0 V 3.3 V 5.0 V 5.5 V 80.0% 75.0% 70.0% Efficiency Efficiency 3.00 Vo=2.5 V 95.0% 80.0% 3.0 V 3.3 V 5.0 V 5.5 V 75.0% 70.0% 65.0% 65.0% 0.30 2.25 Output Current (A) Vo=3.3 V 0.30 1.50 60.0% 0.75 1.50 2.25 Output Current (A) Vo=1.2 V 3.00 0.30 0.75 1.50 2.25 3.00 Output Current (A) Vo=0.9 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 0.9 Vdc - 3.3 Vdc/3 A Output Thermal Derating Curve xRAH-03F1A0 Ripple and Noise Waveforms Vo=0.9 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 0.9 Vdc - 3.3 Vdc/3 A Output Ripple and Noise Waveforms (continued) Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Note: Ripple and noise at full load, 5 Vdc input, and 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 0.9 Vdc - 3.3 Vdc/3 A Output Transient Response Waveforms 50% to 100% load Transient at Vin=5 V, Vo= 0.9 V 100% to 50% load Transient at Vin=5 V, Vo= 0.9 V 50% to 100% load Transient at Vin=5 V, Vo= 1.2 V 100% to 50% load Transient at Vin=5 V, Vo= 1.2 V 50% to 100% load Transient at Vin=5 V, Vo= 1.5 V 100% to 50% load Transient at 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 0.9 Vdc - 3.3 Vdc/3 A Output Transient Response Waveforms (continued) 50% to 100% load Transient at Vin=5 V, Vo= 1.8 V 100% to 50% load Transient at Vin=5 V, Vo= 1.8 V 50% to 100% load Transient at Vin=5 V, Vo= 2.5 V 100% to 50% load Transient at Vin=5 V, Vo= 2.5 V 50% to 100% load Transient at Vin=5 V, Vo= 3.3 V 100% to 50% load Transient at Vin=5 V, Vo= 3.3 V Note: Transient Response at di/dt=0.5 A/uS, 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 0.9 Vdc - 3.3 Vdc/3 A Output Mechanical Outline SRAH-03F1A0 Pin Connections bel VRAH-03F1A0 Pin 1 2 3 4 5 6 7 Function Remote On/Off Vin Ground Vout Trim N/A N/A Pin Connections bel bel Pin Function 1 Remote On/Off 2 Vin 3 Ground 4 Vout 5 Trim 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. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 032806 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