NON-ISOLATED DC/DC CONVERTERS 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output xRAH-03C Series RoHS Compliant Rev.A • Non-Isolated • OCP/SCP • High Efficiency • Wide Range Trim • Low Cost • Remote On/Off • Excellent Thermal Performance • Industrial Temperature Range • Input Under Voltage Lockout • UL60950-1 Recognized (UL/cUL) Description The Bel xRAH-03C1A0 modules are a series of non-isolated, step down dc/dc converters that operate from a nominal 3.3 Vdc source. These converters are available in a range of output voltages from 0.9 Vdc to 2.5 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 output is closely regulated and the efficiency for 2.5 Vdc output 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 0.9 Vdc - 2.5 Vdc 2.5 Vdc 1.8 Vdc 1.5 Vdc 1.2 Vdc 0.9 Vdc Input Voltage 3.3 Vdc 3.3 Vdc 3.3 Vdc 3.3 Vdc 3.3 Vdc 3.3 Vdc Max. Output Current 3A 3A 3A 3A 3A 3A Max. Output Power 7.5 W 7.5 W 5.4 W 4.5 W 3.6 W 2.7 W Typical Efficiency 93% 93% 89% 87% 84% 81% Part Number Surface Mount SRAH-03C1A0 SRAH-03C250 SRAH-03C180 SRAH-03C150 SRAH-03C120 SRAH-03C090 Part Number Vertical Mount VRAH-03C1A0 VRAH-03C250 VRAH-03C180 VRAH-03C150 VRAH-03C120 VRAH-03C090 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) Min -0.3 V Typ - Max 6V Output Enable Terminal Voltage -0.3 V - 6V Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Notes Input Specifications Parameter Input Voltage Input Current (no load) Min Typ Max 3V - 3.6 V - - 110mA - - 3.1 A 2.3 A 1.9 A 1.6 A 1.2 A - 7 mA 14 mA Notes Input Current (full load) VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Input Specifications (continued) Parameter Min Typ Max Notes Input Reflected Ripple Current (pk-pk) - 50 mA 100 mA Input Reflected Ripple Current (rms) - 15 mA 25 mA With simulated source impedance of 500 nH, 5 Hz to 20 MHz; use a 270 uF/6.3 V capacitor with ESR=0.03 ohm max, at 100 kHz. I t Inrush Current Transient - 0.01 A s 0.02 A s Turn on Voltage Threshold - 2.7 V - Turn off Voltage Threshold - 2.4 V - 2 2 2 Note: All specifications are typical at 25 °C unless otherwise stated. Output Specifications Parameter Min Typ Max Notes VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 2.450 V 1.764 V 1.470 V 1.176 V 0.882 V 2.5 V 1.8 V 1.5 V 1.2 V 0.9 V 2.550 V 1.836 V 1.530 V 1.224 V 0.918 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 1 mV 1 mV 1 mV 1 mV 1 mV 5 mV 5 mV 5 mV 5 mV 5 mV VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 1 mV 1 mV 1 mV 1 mV 1 mV 5 mV 5 mV 5 mV 5 mV 5 mV Regulation Over Temperature (-40 °C to +85 °C) VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 10 mV 10 mV 10 mV 10 mV 10 mV 20 mV 20 mV 20 mV 20 mV 20 mV Output Current 0A - 3A Current Limit Threshold 5A - 9A - 0.04 A s 2 0.04 A s 2 0.04 A s 2 0.04 A s 2 0.04 A s Output Voltage Set Point Test conditions: Vin=3.3 V, Io= full load Line Regulation Load Regulation Short Circuit Surge Transient VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 2 2 0.08 A s 2 0.08 A s 2 0.08 A s 2 0.08 A s 2 0.08 A s 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Output Specifications (continued) Parameter Min Typ Max Notes VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 10 mV 10 mV 10 mV 10 mV 10 mV 20 mV 20 mV 20 mV 20 mV 20 mV VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 45 mV 45 mV 45 mV 45 mV 45 mV 70 mV 70 mV 70 mV 70 mV 70 mV Turn on Time - 7 mS 15 mS Overshoot at Turn on - 0% 1% 0 uF - 1200 uF Ripple and Noise (rms) Ripple and Noise (pk-pk) Output Capacitance Test conditions: 0-20 MHz BW; 0.1 uF ceramic capacitor and 10 uF tantalum capacitor at the output. Transient Response 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load - 100 mV 130 mV - 30 uS 60 uS - 100 mV 130 mV Settling Time - 30 uS 60 uS Overshoot - 100 mV 130 mV - 30 uS 60 uS - 100 mV 130 mV Settling Time - 30 uS 60 uS Overshoot - 90 mV 120 mV - 30 uS 60 uS - 90 mV 120 mV Settling Time - 30 uS 60 uS Overshoot - 90 mV 120 mV Settling Time - 30 uS 60 uS - 90 mV 120 mV Settling Time - 30 uS 60 uS Overshoot - 90 mV 120 mV - 30 uS 60 uS - 90 mV 120 mV - 30 uS 60 uS Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Overshoot Settling Time Overshoot Settling Time VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Test conditions: di/dt=0.5 A/us, Vin=3.3 V, without any external capacitor at the output. 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output General Specifications Parameter Min Typ Max Notes 90% 86% 84% 81% 78% 93% 89% 87% 84% 81% - 250 kHz 300 kHz 340 kHz 0 - 292%VO 90%Vo - - 110%Vo 110%Vo Efficiency VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Switching Frequency Output Trim Range (wide trim) Output Trim Range (narrow trim) Vo=1.2 V - 2.5 V Vo=0.9 V MTBF Weight Vo=0.9 V Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) 3,131,719 hours Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Measured at Vin=3.3 V, full load and Ta=25 °C 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 - Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Min Typ Max Signal Low (Unit Off) -0.3 V - 0.3 V Signal High (Unit On) 1.8 V - 3.6 V Notes Remote On/Off 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 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. Vout A −B Rtrimdown = Vnom − Vadj Rtrimdown Module Trim GND Vout C Rtrimup = −D Vadj − Vnom Module Trim Rtrimup GND Vnom A B C D Notes 0.9 - 2.5 N/A N/A 3.712 1.54 Vo=0.9 V when Rtrim is open 2.5 7.9117 16.14 3.712 11.5 Vo=2.505 V when Rtrim is open 1.8 4.6538 20.84 3.712 16.2 Vo=1.803 V when Rtrim is open 1.5 3.2633 16.14 3.712 11.5 Vo=1.503 V when Rtrim is open 1.2 1.8699 11.45 3.712 6.81 Vo=1.203 V when Rtrim is open 0.9 N/A N/A 3.712 33.2 Vo=0.903 V when Rtrim is open 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Efficiency Data MODULE 1.8V 100% EFFICIENCY EFFICIENCY MODULE 2.5V 3.0V 3.3V 3.6V 90% 80% 70% 100% 90% 3.0V 80% 3.3V 70% 3.6V 60% 60% 0.3 0.75 1.5 2.25 OUTPUT CURRENT 0.3 3 EFFICIENCY 3.3V 3.6V 2.25 3 100% 90% 80% 70% 60% 50% 3.0V 3.3V 3.6V 0.3 3 0.75 1.5 2.25 3 OUTPUT CURRENT OUTPUT CURRETN MODULE 0.9V EFFICIENCY EFFICIENCY 3.0V 1.5 2.25 MODULE 1.2V 100% 90% 80% 70% 60% 50% 0.75 1.5 OUTPUT CURRENT MODULE 1.5V 0.3 0.75 100% 80% 3.0V 3.3V 60% 3.6V 40% 0.3 0.75 1.5 2.25 3 OUTPUT 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Thermal Derating Curve Ripple and Noise Waveform Ripple and noise at full load, 3.3 V input, 2.5 V output Note: Ripple and Noise with 0.1 uF/16 V X7R ceramic capacitor and 10 uF tantalum capacitor 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Transient Response Waveforms 50% to 100% load Transient at 3.3 V input, 2.5 V output 100% to 50% load Transient at 3.3 V input, 2.5 V output Note: Transient Response at di/dt=0.5A/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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/3 A Output Mechanical Outline SRAH-03C1A0 Pin Connections Pin Function 1 2 3 4 5 6 7 Remote On/Off (option) Vin Ground Vout Trim (option) N/A N/A Pin Connections VRAH-03C1A0 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. 010807 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