NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B SRAH-05B / VRAH-05B Series RoHS Compliant • 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-05B and VRAH-05B modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal 5V source. These converters are available in a range of output voltages from 1.2V to 3.3V. 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 5V 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 3.3V 5V 5A 16.5W 92% SRAH-05B330 VRAH-05B330 2.5V 5V 5A 12.5W 90% SRAH-05B250 VRAH-05B250 1.8V 5V 5A 9.0W 86% SRAH-05B180 VRAH-05B180 1.5V 5V 5A 7.5W 84% SRAH-05B150 VRAH-05B150 1.2V 5V 5A 6W 82% SRAH-05B120 VRAH-05B120 ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Absolute Maximum Ratings Parameter Max Unit -0.3 6 V Vouten -0.3 6 V Ambient Temperature Tamb 0 70 °C Storage Temperature Tstor -40 100 °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 4.5 Input Current Typical Max Units 5.5 V A Iin 4.6 3.6 2.7 2.3 1.9 3.3V 2.5V 1.8V 1.5V 1.2V No Load Input Current mA 30 All Remote Off Input Current 4 8 mA Input Reflected Ripple Current1 All 30 60 mArms Input Reflected Ripple Current (P-P)1 All 100 150 mApk I2t Inrush Current Transient All 0.02 0.05 A2s Turn On Voltage Threshold All 4.3 4.5 V Turn Off Voltage Threshold All 3.9 4.49 V 4.19 Note: Input capacitance one 270µF/16V, ESR = 0.018 Ω max at 100kHz @ 25° C. 1. With simulated source impedance of 500nH, 5Hz to 20MHz. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Output Specifications Parameter Module Min Typical Max 3.234 2.45 1.764 1.47 1.176 3.3 2.5 1.8 1.5 1.2 3.366 2.55 1.836 1.53 1.224 3.3V 2.5V 1.8V 1.5V 1.2V 6.0 6.0 6.0 6.0 6.0 15 15 15 15 15 3.3V 2.5V 1.8V 1.5V 1.2V 3.0 3.0 3.0 3.0 3.0 10 10 8 8 8 3.3V 2.5V 1.8V 1.5V 1.2V 20 20 10 10 8 33 25 18 15 12 Output Voltage Set Point 1 Symbol Units Vout 3.3V 2.5V 1.8V 1.5V 1.2V V Load Regulation mV Line Regulation mV Regulation Over Temperature mV Total Output Voltage Regulation mV 3.3V 2.5V 1.8V 1.5V 1.2V 58 50 41 38 35 Output Ripple and Noise 2 All 50 100 mVp-p Output Ripple and Noise 2 All 15 25 mVrms Output Current Range All Iout 0 5 A Output DC Current Limit All Ioutlim 6.5 12.5 A Shor t Circuit Surge A 2s Ioutsurge 3.3V 2.5V 1.8V 1.5V 1.2V Turn on Time All Overshoot at Turn On All Output Capacitance All Ton Cout 0 0.08 0.05 0.05 0.05 0.05 0.2 0.1 0.1 0.1 0.1 12 20 ms 0 3 % 2000 µF Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 1. Vin = 5V, Iout = full load, Ta = 25° C. 2. 0 - 20MHz, 1µF ceramic cap and 10µF aluminum cap on output. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Output Specifications Parameter Module Transient Response Symbol Min Typical Max Units 120 165 mV 25 50 µs 120 165 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 3 ∆V 50% to 100% of Max Load Settling Time Ts 3.3V ∆V 100% to 50% of Max Load Settling Time Ts Transient Response 3 ∆V 50% to 100% of Max Load Settling Time Ts 2.5V ∆V 100% to 50% of Max Load Settling Time Ts Transient Response 3 ∆V 50% to 100% of Max Load Settling Time Ts 1.8V ∆V 100% to 50% of Max Load Settling Time Ts Transient Response 3 ∆V 50% to 100% of Max Load Settling Time Ts 1.5V ∆V 100% to 50% of Max Load Settling Time Ts Transient Response 3 ∆V 50% to 100% of Max Load Settling Time Ts 1.2V ∆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. 3. di/dt = 0.5A/1µS, Ta = 25° C without external load capacitance. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B General Specifications Parameter Module Symbol Min Typical 89 87 83 81 79 92 90 86 84 82 260 300 Max Units η Efficiency1 % 3.3V 2.5V 1.8V 1.5V 1.2V Switching Frequency All Output Voltage Trim Range2 All Weight All Fsw kHz 340 90 % 110 4.7 g 1. Vin=5V, 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 On) All 0 1 V Signal High (Unit Off) All 2.8 5.5 V 3. With remote on/off pin 1 open, the module is on. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 5 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Efficiency Data Module 2.5V Module 3.3V 95% 94% 96% 4.5V 95% 5.0V 94% 5.5V 93% Efficiency Efficiency 97% 5.0V 92% 5.5V 91% 92% 90% 1 2 3 4 5 6 1 2 3 4 Output Current Output Current Module 1.8V Module 1.5V 5 6 92% 93% 92% 91% 4.5V 91% 90% 89% 88% 5.0V 5.5V Efficiency Efficiency 4.5V 93% 90% 4.5V 89% 5.0V 88% 5.5V 87% 86% 87% 86% 85% 1 2 3 4 5 1 6 2 3 4 5 6 Output Current Output Current Module 1.2V Efficiency 88% 87% 86% 4.5V 85% 5.0V 84% 5.5V 83% 82% 81% 1 2 3 4 5 6 Output Current ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A POWER PRODUCTS BP06xRAH-05B Ripple and Noise 1µF ceramic cap and 10µF aluminum electrolytic cap added at the output. Ripple and noise at full load and 5Vdc input, 3.3Vdc output and Ta=25° C Ripple and noise at full load and 5Vdc input, 1.8Vdc output and Ta=25° C Ripple and noise at full load and 5Vdc input, 2.5Vdc output and Ta=25° C Ripple and noise at full load and 5Vdc input, 1.5Vdc output and Ta=25° C Ripple and noise at full load and 5Vdc input, 1.2Vdc output and Ta=25° C ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=3.3V 50% to 100% load transients at 5V input and Ta=25° C Vout=3.3V 100% to 50% load transients at 5V input and Ta=25° C Vout=2.5V 50% to 100% load transients at 5V input and Ta=25° C Vout=2.5V 100% to 50% load transients at 5V input and Ta=25° C Vout=1.8V 50% to 100% load transients at 5V input and Ta=25° C Vout=1.8V 100% to 50% load transients at 5V input and Ta=25° C ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A POWER PRODUCTS BP06xRAH-05B Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=1.5V 50% to 100% load transients at 5V input and Ta=25° C Vout=1.5V 100% to 50% load transients at 5V input and Ta=25° C Vout=1.2V 50% to 100% load transients at 5V input and Ta=25° C Vout=1.2V 100% to 50% load transients at 5V input and Ta=25° C ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 9 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Thermal Considerations SRAH-05B VRAH-05B ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Output Voltage Set-Point Adjustment Trim Down Test Circuit Trim Up Test Circuit Vo Vo Trim Trim Gnd Gnd Output Voltage Set-Point Adjustment Rtrim down = ( 7.914 – 8.27) Kohm Vo – Vo, adj Trim resistor value Rtrim_down(Kohm) xRAH-05B330 Trim Resistor Calculation 270 240 210 180 150.01 120.01 90.01 60.01 30.01 Rtrim up = ( 2.528 – 5.11) Kohm Vo, adj – Vo Trim resistor value,Rtrim_up(Kohm) 0.01 2.97 3 3.04 3.33 3.37 3.07 3.1 3.13 3.17 3.2 Adjusted output voltage Vo,adj (V) 3.23 3.27 3.3 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 3.3 3.4 3.43 3.46 3.5 3.53 Adjusted output voltage Vo,adj(V) ©2006 Bel Fuse Inc. 3.56 3.6 3.63 Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B xRAH-05B250 Trim Resistor Calculation Rtrim up = ( 3.664 – 6.79) Kohm Vo – Vo, adj 1.72 – 4.64) Kohm Vo, adj – Vo ( 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 2.25 Trim resistor value,Rtrim_up(Kohm) Rtrim down = Trim resistor value Rtrim_down(Kohm) Output Voltage Set-Point Adjustment 2.27 2.3 2.52 2.55 2.33 2.35 2.38 2.4 2.42 Adjusted output voltage Vo,adj (V) 2.45 2.48 2.5 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 2.5 2.58 2.6 2.63 2.65 2.67 Adjusted output voltage Vo,adj(V) 2.7 2.73 2.75 Trim resistor value Rtrim_down(Kohm) 300 270.1 240.2 xRAH-05B180 Trim Resistor Calculation 210.3 180.4 150.5 120.6 90.7 Rtrim down = 60.8 30.9 1 1.62 1.64 1.66 1.67 1.69 1.71 1.73 1.75 1.76 Adjusted output voltage Vo,adj (V) 1.78 ( 1.509 – 5.52) Kohm Vo – Vo, adj 1.8 Trim resistor value,Rtrim_up(Kohm) 300 270.1 240.2 210.3 180.4 150.5 Rtrim up = 120.6 90.7 ( 1.2 – 4.02) Kohm Vo, adj – Vo 60.8 30.9 1 1.8 1.82 ©2006 Bel Fuse Inc. 1.83 1.85 1.86 1.88 1.9 1.91 1.93 Adjusted output voltage Vo,adj(V) 1.94 1.96 Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Trim resistor value Rtrim_down(Kohm) Output Voltage Set-Point Adjustment xRAH-05B150 Trim Resistor Calculation Rtrim down = ( 2.702 – 11.7) Kohm Vo – Vo, adj 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 1.35 1.37 1.38 1.4 1.41 1.43 1.44 1.46 Adjusted output voltage Vo,adj (V) 1.51 1.53 1.54 1.56 1.58 1.59 1.61 Adjus ted output voltage Vo,adj(V) 1.47 1.49 1.5 Rtrim up = ( Trim resistor value,Rtrim_ up(Kohm) 270 3.064 – 7.87) Kohm Vo, adj – Vo 240 210 180 150.01 120.01 90.01 60.01 30.01 Trim resistor value Rtrim_down(Kohm) 0.01 1.5 1.62 1.64 1.65 270 240 xRAH-05B120 Trim Resistor Calculation 210 180 150.01 120.01 90.01 Rtrim down = 60.01 30.01 0.01 1.08 1.09 1.1 1.12 1.13 1.14 1.15 1.16 1.18 1.19 ( 1.545 – 8.47) Kohm Vo – Vo, adj 1.2 Adjusted output voltage Vo,adj (V) Trim resistor value,Rtrim_up(Kohm) 270 240 210 180 150.01 Rtrim up = 120.01 90.01 ( 3.064 – 4.64) Kohm Vo, adj – Vo 60.01 30.01 0.01 1.2 1.21 1.22 1.24 1.25 1.26 1.27 1.28 1.3 1.31 1.32 Adjusted output voltage Vo,adj(V) ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Mechanical SRAH-05B 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. ©2006 Bel Fuse Inc. 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 Specifications subject to change without notice. 02.06 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 14 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 1.2V – 3.3V Output / 5A BP06xRAH-05B Mechanical 0.700 [17.78] VRAH-05B 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. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 02.06 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 15