NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C SRAH-05C / VRAH-05C Series • Nonisolated • Compact, low profile surface mount package • Fixed frequency • High efficiency means less power dissipation • Excellent thermal performance • Optimized for cost • Remote on/off • Undervoltage lockout (UVLO) • Over current and short circuit protection Description The Bel SRAH-05C and VRAH-05C modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal 3.3V source. These converters are available in a range of output voltages from 1.2V to 2.5V. They are packaged in a compact, overmolded package rated at 5A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. Standard features include remote on/off, over current and short circuit protection, and output voltage adjust. These products may be used almost anywhere low voltage silicon is employed and a 3.3V source is available. Typical applications include file servers, routers, line cards and other computing and communications equipment. Applications • Distributed power architectures • Data networking equipment • Telecommunications • Computers and peripherals Part Number Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Part Number Surface Mount Part Number Vertical Mount 2.5V 3.3V 5A 12.5W 91% SRAH-05C250 VRAH-05C250 1.8V 3.3V 5A 9.0W 88% SRAH-05C180 VRAH-05C180 1.5V 3.3V 5A 7.5W 86% SRAH-05C150 VRAH-05C150 1.2V 3.3V 5A 6W 83% SRAH-05C120 VRAH-05C120 ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 1 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Absolute Maximum Ratings Parameter Max Unit -0.3 6 V Vouten -0.3 6 V Ambient Temperature Tamb -40 85 °C Storage Temperature Tstor -40 105 °C Continuous Input Voltage Output Enable Terminal Voltage Symbol Min Vin Typical Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC converter or may permanently damage the device. Input Specifications Parameter Operating Input Voltage Module Symbol Min All Vin 3 Input Current Typical Max Units 3.6 V Iin No Load Input Current A 2.5V 1.8V 1.5V 1.2V 4.8 4.0 3.5 3.0 All 90 mA 3 10 mA Remote Off Input Current Input Reflected Ripple Current1 All 30 45 mArms Input Reflected Ripple Current (P-P)1 All 100 150 mApk I2t Inrush Current Transient All 0.0005 0.001 A2s Turn On Voltage Threshold All 2.7 V Turn Off Voltage Threshold All 2.6 2.5 V Note: Input capacitance 270µF/16V, ESR = 0.03 Ω max at 100kHz @ 25° C. 1. With simulated source impedance of 500nH, 5Hz to 20MHz. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 2 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Output Specifications Parameter Module Output Voltage Set Point 1 Symbol Min Typical Max 2.450 1.764 1.470 1.176 2.500 1.800 1.500 1.200 2.550 1.836 1.530 1.224 Units Vout 2.5V 1.8V 1.5V 1.2V V Load Regulation All 5 10 mV Line Regulation All 3 5 mV Regulation Over Temperature All 20 30 mV Total Output Voltage Regulation All 28 45 mV Output Ripple and Noise 2 All 30 80 mVp-p Output Ripple and Noise 2 All 10 20 mVrms Output Current Range All Iout 0 5 A Output DC Current Limit All Ioutlim 6 10 A Shor t Circuit Surge A 2s Ioutsurge 2.5V 1.8V 1.5V 1.2V Turn on Time All Overshoot at Turn On All Output Capacitance All Ton Cout 0.07 0.07 0.07 0.07 0.1 0.1 0.1 0.1 7 15 ms 0 1 % 2200 µF 80 170 mV 80 120 µs 80 170 mV 80 120 µs 0 Transient Response 3 ∆V 50% to 100% of Max Load Settling Time Ts All ∆V 100% to 50% of Max Load Settling Time Ts Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 1. Vin = 3.3V, Iout = full load, Ta = 25° C. 2. 0 - 20MHz, 1µF ceramic cap and 10µF aluminum cap on output. 3. di/dt = 0.5A/1µS, Ta = 25° C without external load capacitance. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 3 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C General Specifications Parameter Module Symbol Min Typical 89 86 84 81 91 88 86 83 570 600 Max Units η Efficiency1 % 2.5V 1.8V 1.5V 1.2V Switching Frequency All Fsw kHz 630 Output Voltage Trim Range2 % 2.5V 1.8V 1.5V 1.2V Weight 90 90 90 90 105 110 110 110 4.9 All g 1. Vin=3.3V, full load and Ta=25° C. 2. See graphs on pages 10-12. Control Specifications Parameter Remote On/Off 3 Module Symbol All Vouten Min Typical Max Units V Signal Low (Unit Off) All -0.3 1 V Signal High (Unit On) All 1.8 3.6 V 3. With remote on/off pin 1 open, the module is on. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 4 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Efficiency Data Module 1.8V Module 2.5V 94% 96% Efficiency 3.0V 92% 3.3V 90% 3.6V Efficiency 92% 94% 90% 3.0V 88% 3.3V 86% 3.6V 84% 88% 82% 86% 1 2 3 4 1 5 2 Module 1.5V 88% 3.0V 86% 3.3V 84% 3.6V 82% 80% 4 Efficiency Efficiency 90% 3 5 Module 1.2V 92% 2 4 Output Current Output Current 1 3 89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 79% 78% 5 Output Current 3.0V 3.3V 3.6V 1 2 3 4 5 Output Current Note: On/off pin designed to work with an open collector/drain switch. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 5 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Ripple and Noise 1µF ceramic cap and 10µF aluminum cap added at the output. Ripple and noise at full load and 3.3Vdc input, 2.5Vdc output and Ta=25° C Ripple and noise at full load and 3.3Vdc input, 1.5Vdc output and Ta=25° C ©2005 Bel Fuse Inc. Ripple and noise at full load and 3.3Vdc input, 1.8Vdc output and Ta=25° C Ripple and noise at full load and 3.3Vdc input, 1.2Vdc output and Ta=25° C Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 6 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 5A POWER PRODUCTS BP05xRAH-05C Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=2.5V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=2.5V 100% to 50% load transients at 3.3V input and Ta=25° C Vout=1.8V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=1.8V 100% to 50% load transients at 3.3V input and Ta=25° C ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 7 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=1.5V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=1.5V 100% to 50% load transients at 3.3V input and Ta=25° C Vout=1.2V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=1.2V 100% to 50% load transients at 3.3V input and Ta=25° C ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 8 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 5A POWER PRODUCTS BP05xRAH-05C Thermal Considerations SRAH-05C VRAH-05C ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 9 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Output Voltage Set-Point Adjustment Trim Down Test Circuit Trim Up Test Circuit Vo Trim Gnd Vo Trim Gnd Output Voltage Set-Point Adjustment xRAH-05C250 Trim Resistor Calculation Rtrim down = Rtrim up = ( ©2005 Bel Fuse Inc. ( 9.5565 – 20.32) Kohm Vo – Vo, adj 4.496 – 14.7) Kohm Vo, adj – Vo Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 10 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Output Voltage Set-Point Adjustment xRAH-05C180 Trim Resistor Calculation Rtrim down = Rtrim up = ( ( 3.8488 – 18.54) Kohm Vo – Vo, adj 3.064 – 14.7) Kohm Vo, adj – Vo x7AH-05C150 Trim Resistor Calculation Rtrim down = Rtrim up = ( ( 2.6977 – 15.33) Kohm Vo – Vo, adj 3.064 – 11.5) Kohm Vo, adj – Vo ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 11 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Output Voltage Set-Point Adjustment xRAH-05C120 Trim Resistor Calculation Rtrim down = Rtrim up = ( ©2005 Bel Fuse Inc. ( 0.8501 – 6.79) Kohm Vo – Vo, adj 1.72 – 4.64) Kohm Vo, adj – Vo Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 12 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C Mechanical SRAH-05C Suggested PCB Pad Layout 0.400 [10.16] 0.60 [15.24] 0.065 [1.65] 0.110 [2.79] 0.855 [21.72] 0.050 [1.27] R0.015 [R0.38] typ 0.70 [17.78] R0.008 [R0.20] typ 0.100 [2.54] 0.012 [0.30] 0˚-5˚ 0.004 [0.10] 0.050 [1.27] 0.100 [2.54] 4x 0.400 [10.16] 0.320 [8.13] 0.020 [0.51] 0.055 [1.40] 2x 0.090 [2.29] 2x 0.780 [19.81] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. Pin Function 1 Remote On/Off 2 +Vin 3 Ground 4 +Vo 5 Trim 6 No Connection 7 No Connection 7 6 1 2 3 4 5 ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 13 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 1.2V – 2.5V Output / 5A BP05xRAH-05C 0.700 [17.78] Mechanical VRAH-05C 0.050 [1.27] 0.600 [15.24] 0.265 [6.73] min 0.050 [1.27] 0.100 [2.54] 0.400 [10.16] 0.020 [0.51] 0.308 [7.82] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. Pin Function 1 Remote On/Off 2 +Vin 3 Ground 4 +Vo 5 Trim 1 2 3 4 5 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 240ºC. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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 page 14