NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A POWER PRODUCTS BP06xRAH-08B SRAH-08B / VRAH-08B 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-08B and VRAH-08B 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 0.9V to 3.3V. They are packaged in a compact, overmolded package rated at 8A. 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, output voltage adjust and industrial temperature range (-40° to +85° C). The output is closely regulated and the efficiency is typically 92% at full load. 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 8A 26.4W 92% SRAH-08B330 VRAH-08B330 2.5V 5V 8A 20W 90% SRAH-08B250 VRAH-08B250 1.8V 5V 8A 14.4W 86% SRAH-08B180 VRAH-08B180 1.5V 5V 8A 12W 84% SRAH-08B150 VRAH-08B150 1.2V 5V 8A 9.6W 82% SRAH-08B120 VRAH-08B120 1.0V 5V 8A 8W 80% SRAH-08B100 VRAH-08B100 0.9V 5V 8A 7.2W 79% SRAH-08B090 VRAH-08B090 0.9V - 3.3V 5V 8A 26.4W 92% SRAH-08B1A0 VVAH-08B1A0 ©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 / 0.9V – 3.3V Output / 8A BP06xRAH-08B Absolute Maximum Ratings Parameter Max Unit -0.3 6 V Vouten -0.3 6 V Ambient Temperature Tamb -40 85 °C Storage Temperature Tstor -55 125 °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 Iin No Load Input Current A 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V 7.3 5.6 4.3 3.6 3.0 2.5 2.3 All 80 mA 9 15 mA Remote Off Input Current Input Reflected Ripple Current1 All 50 80 mArms Input Reflected Ripple Current (P-P)1 All 150 200 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 3.8 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 / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Specifications Parameter Module Min Typical Max 3.234 2.45 1.764 1.47 1.176 0.98 0.882 3.3 2.5 1.8 1.5 1.2 1.0 0.9 3.366 2.55 1.836 1.53 1.224 1.02 0.918 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V 6 6 6 3 3 3 3 15 15 15 10 10 10 10 All 2 5 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V 20 20 10 10 5 5 5 33 25 18 15 10 10 10 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V 28 28 18 15 10 10 10 53 45 38 30 25 25 25 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 8 A Output DC Current Limit All Ioutlim 10.4 20 A Output Voltage Set Point 1 Symbol Vout 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V V mV Load Regulation Line Regulation Regulation Over Temperature (-40° to +85° C) Units mV mV mV Total Output Voltage Regulation Shor t Circuit Surge A2s Ioutsurge 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V 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 0.05 0.05 0.2 0.1 0.1 0.1 0.1 0.1 0.1 12 20 ms 0 3 % 3300 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 / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Specifications Parameter Module Transient Response Symbol Min Typical Max Units 130 165 mV 100 150 µs 130 165 mV 100 150 µs 130 165 mV 30 60 µs 120 165 mV 30 60 µs 120 165 mV 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 25 50 µs 120 165 mV 25 50 µs 100 150 mV 25 50 µs 100 150 mV 25 50 µs 90 125 mV 25 50 µs 90 125 mV 25 50 µs 70 110 mV Ts 25 50 µs 70 110 mV Ts 25 50 µs 70 110 mV 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 Transient Response 3 ∆V 50% to 100% of Max Load Settling Time 1.0V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 ∆V 50% to 100% of Max Load Settling Time Ts 25 50 µs 70 110 mV 25 50 µs 0.9V ∆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/µS, Ta = 25° C without external load capacitance; when Vout=3.3V or 2.5V a 220µF aluminum cap is added at 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 4 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B General Specifications Parameter Module Symbol Min Typical 89 87 83 81 79 77 76 92 90 86 84 82 80 79 250 300 Max Units η Efficiency1 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V Switching Frequency All Output Voltage Trim Range2 (Wide Trim) Fsw 1.8V % 47.5 340 kHz 202 % Output Voltage Trim Range2 (Narrow Trim) % 3.3V 2.5V 1.8V 1.5V 1.2V 1.0V 0.9V Weight 110 110 110 110 110 110 110 90 90 90 90 90 90 95 All 4.7 g 1. Vin=5V, full load and Ta=25° C. 2. See graphs on page 13 - 20. Control Specifications Parameter Remote On/Off 1 Module Symbol All Vouten Min Typical 1.35 All -0.3 Vin = 5.5V V 1.65 Vin = 4.5V Signal High (Unit On)2 Units V Vin = 4.5V Signal Low (Unit Off)2 Max 3.15 All Vin = 5.5V 5.5 V 3.85 1. With remote on/off pin 1 open, the module is on. 2. Signal low and signal high varies based on Vin. Note: On/off pin designed to work with an open collector/drain switch. ©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 / 0.9V – 3.3V Output / 8A BP06xRAH-08B Efficiency Data MODULE 2.5V 96% 95% 95% 94% 94% 93% 93% 4.5V 5.0V 92% 5.5V 91% 90% EFFICIENCY EFFICIENCY MODULE 3.3V 92% 4.5V 91% 5.0V 90% 5.5V 89% 88% 89% 87% 88% 86% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 1.0 2.0 3.0 OUTPUT CURRENT 5.0 6.0 7.0 8.0 MODULE 1.5V MODULE 1.8V 92% 93% 90% 4.5V 89% 5.0V 5.5V 87% 85% EFFICIENCY 91% EFFICIENCY 4.0 OUTPUT CURRENT 88% 4.5v 5.0v 86% 5.5v 84% 82% 83% 80% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 OUTPUT CURRENT ©2006 Bel Fuse Inc. 8.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 OUTPUT CURRENT 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 8.0 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Efficiency Data MODULE 1.2V 90% EFFICIENCY 88% 86% 4.5v 5.0v 84% 5.5v 82% 80% 78% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 OUTPUT CURRENT MODULE 1.0V 88% EFFICIENCY 86% 84% 4.5V 5.0V 82% 5.5V 80% 78% 76% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 OUTPUT CURRENT MODULE 0.9V 88% EFFICIENCY 86% 84% 4.5V 5.0V 82% 5.5V 80% 78% 76% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 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 7 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B 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 ©2006 Bel Fuse Inc. 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 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 / 0.9V – 3.3V Output / 8A POWER PRODUCTS BP06xRAH-08B Ripple and Noise 1µF ceramic cap and 10µF aluminum electrolytic cap added at the output. Ripple and noise at full load and 5Vdc input, 1.2Vdc output and Ta=25° C Ripple and noise at full load and 5Vdc input, 1.0Vdc output and Ta=25° C Ripple and noise at full load and 5Vdc input, 0.9Vdc 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 9 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance. Note: 3.3Vdc and 2.5Vdc output with external 220uF aluminum 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 10 NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A POWER PRODUCTS BP06xRAH-08B 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 Vout=1.0V 50% to 100% load transients at 5V input and Ta=25° C Vout=1.0V 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 11 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=0.9V 50% to 100% load transients at 5V input and Ta=25° C Vout=0.9V 100% to 50% load transients at 5V input and Ta=25° C Thermal Considerations SRAH-08B ©2006 Bel Fuse Inc. VRAH-08B 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 / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment Trim Down Test Circuit Trim Up Test Circuit Vo Vo Trim Trim Gnd Gnd xRAH-08B1A0 Trim Resistor Calculation Rtrim −down 250.362 =( − 261.1)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.805V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Ohm) 3000 2700 2400 2100 1800 1500 1200 900 600 300 0 0.85 0.94 1.04 1.14 1.23 1.33 1.42 1.52 1.61 A djus ted output voltage Vo,adj (V) 1.71 2 2.2 2.4 2.6 2.8 3 3.2 3.4 A djus ted output voltage Vo,adj(V) 3.6 1.8 Rtrim −up 199.2 =( − 12.1)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.805V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Ohm) 3000 2700 2400 2100 1800 1500 1200 900 600 300 0 1.8 ©2006 Bel Fuse Inc. 3.8 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 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment Rtrim −down 623.741 =( − 651)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.305V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Ohm) xRAH-08B330 Trim Resistor Calculation 1.55 .10 4 1.4 .10 4 1.25 .10 4 1.1 .10 4 9500 8000 6500 5000 3500 2000 500 Rtrim −up = ( 199.2 − 402)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.305V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Ohm) 1 .10 2.8 2.85 2.9 2.95 3 3.05 3.1 3.15 3.2 A djus ted output voltage Vo,adj (V) 3.25 3.3 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 A djus ted output voltage Vo,adj(V) 3.75 3.8 4 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 ©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 14 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment xRAH-08B250 Trim Resistor Calculation Rtrim −down 423.933 =( − 760)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.503V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Ohm) 1.5 .10 4 4 1.35 .10 1.2 .10 4 4 1.05 .10 9000 7500 6000 4500 3000 1500 0 2.1 Rtrim −up 199.2 =( − 511)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.503V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Ohm) 1 .10 2.14 2.18 2.22 2.26 2.3 2.34 2.38 2.42 A djus ted output voltage Vo,adj (V) 2.46 2.5 2.54 2.58 2.62 2.66 2.7 2.74 2.78 2.82 A djus ted output voltage Vo,adj(V) 2.86 2.9 4 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 2.5 ©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 15 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment Rtrim −down 250.362 =( − 760)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.805V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Ohm) xRAH-08B180 Trim Resistor Calculation 1.5 .10 4 1.35 .10 4 1.2 .10 4 1.05 .10 4 9000 7500 6000 4500 3000 1500 0 1.5 1.53 1.56 1.59 1.62 1.65 1.68 1.71 1.74 A djus ted output voltage Vo,adj (V) 1.77 1.8 1.83 1.86 1.89 1.92 1.95 1.98 2.01 2.04 A djus ted output voltage Vo,adj(V) 2.07 2.1 4 Rtrim −up = ( 199.2 − 511)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.805V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Ohm) 1 .10 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 ©2006 Bel Fuse Inc. 1.8 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 16 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment xRAH-08B150 Trim Resistor Calculation 4 Rtrim−down = ( 122.255 − 522)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.503V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) 1.5 .10 4 1.35 .10 4 1.2 .10 4 1.05 .10 9000 7500 6000 4500 3000 1500 0 1.35 1.37 1.38 1.4 1.41 1.43 1.44 1.46 1.47 1.49 Adjusted output voltage Vo,adj (V) 1.5 4 1.5 .10 Rtrim−up = ( 139.2 − 348)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.503V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 4 1.35 .10 4 1.2 .10 4 1.05 .10 9000 7500 6000 4500 3000 1500 0 1.5 1.51 1.53 1.54 1.56 1.58 1.59 1.61 1.62 Adjusted output voltage Vo,adj(V) ©2006 Bel Fuse Inc. 1.64 1.65 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 17 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment xRAH-08B120 Trim Resistor Calculation Rtrim −down = ( 40.38 − 200)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.204V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Ohm) 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 0 1 1.02 1.04 1.06 1.08 1.1 1.12 1.14 1.16 A djus ted output voltage Vo,adj (V) 1.18 1.2 1.2 1.22 1.24 1.26 1.28 1.3 1.32 1.34 1.36 A djus ted output voltage Vo,adj(V) 1.38 1.4 4 Rtrim −up 80 =( − 100)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.204V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Ohm) 1 .10 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 ©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 18 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment xRAH-08B100 Trim Resistor Calculation Rtrim −down = ( Trim resistor value Rtrim_down(Ohm) 1000 10.544 − 63.2)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.006V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. 900 800 700 600 500 400 300 200 100 0 0.85 0.86 0.88 0.9 0.91 0.93 0.94 0.95 0.97 A djus ted output voltage Vo,adj (V) 0.98 1 1.02 1.04 1.06 1.08 1.1 1.12 1.14 1.16 A djus ted output voltage Vo,adj(V) 1.18 1.2 4 Rtrim −up = ( 40.88 − 12.1)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.006V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Ohm) 1 .10 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 ©2006 Bel Fuse Inc. 1 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 19 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Output Voltage Set-Point Adjustment xRAH-08B090 Trim Resistor Calculation Rtrim −down 2.751 =( − 38.2)ohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=0.905V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Ohm) 400 360 320 280 240 200 160 120 80 40 0 0.85 Rtrim −up = ( 20.88 − 12.1)ohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=0.905V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Ohm) 1 .10 0.855 0.86 0.865 0.87 0.875 0.88 0.885 0.89 A djus ted output voltage Vo,adj (V) 0.895 0.9 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 A djus ted output voltage Vo,adj(V) 0.99 1 4 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 0.9 ©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 20 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Mechanical SRAH-08B 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] 0.320 [8.13] 0.020 [0.51] 0.100 [2.54] 4x 0.400 [10.16] 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 ©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 21 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 0.9V – 3.3V Output / 8A BP06xRAH-08B Mechanical 0.700 [17.78] VRAH-08B 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 22