NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A SRAH-02A / VRAH-02A 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 • Industrial temperature range Description The Bel SRAH-02A and VRAH-02A modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal 12V source. These converters are available in a range of output voltages from 0.9V to 5.0V. They are packaged in a compact, overmolded package rated at 2A. 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 ranges (-40° to +85° C). The output is closely regulated and the efficiency is typically 89% at full load. These products may be used almost anywhere low voltage silicon is employed and a 12V source is available. Typical applications include file servers, routers, line cards and other computing and communications equipment. Applications • Distributed power architectures • Telecommunications • Data networking equipment • 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 5.0V 12V 2A 10W 89% SRAH-02A500 VRAH-02A500 5.0V 12V 2A 10W 89% SRAH-02A50F* VRAH-02A50F* 3.3V 12V 2A 6.6W 88% SRAH-02A330 VRAH-02A330 2.5V 12V 2A 5.0W 86% SRAH-02A250 VRAH-02A250 1.8V 12V 2A 3.6W 82% SRAH-02A180 VRAH-02A180 1.5V 12V 2A 3.0W 78% SRAH-02A150 VRAH-02A150 1.2V 12V 2A 2.4W 74% SRAH-02A120 VRAH-02A120 0.9V 12V 2A 1.8W 70% SRAH-02A090 VRAH-02A090 0.9 ~ 3.63V 12V 2A 7.3W 70% SRAH-02A1A0 VRAH-02A1A0 0.9 ~ 3.63V 12V 2A 7.3W 70% SRAH-02A1AF* VRAH-02A1AF* * F indicates fast start up. ©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 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Absolute Maximum Ratings Parameter Max Unit -0.3 15 V Vouten -0.3 15 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 10.8 Typical Max Units 13.2 V Iin Input Current A 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 1.2 0.85 0.7 0.5 0.45 0.4 0.35 No Load Input Current All 50 mA Remote Off Input Current All 3 10 mA Input Reflected Ripple Current1 All 100 mArms Input Reflected Ripple Current (P-P)1 All 300 mApk I2t Inrush Current Transient All 0.01 Turn On Voltage Threshold All 9.6 Turn Off Voltage Threshold All 8.8 0.02 A2s V 9.8 V Note: 1. Use a 47uF/25V tan capacitor at the input. ©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 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Specifications Parameter Module Min Typical Max 4.9 3.247 2.460 1.771 1.476 1.181 0.886 5.0 3.3 2.5 1.8 1.5 1.2 0.9 5.1 3.353 2.540 1.829 1.524 1.219 0.914 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 15 10 8 5 5 4 3 30 30 20 10 10 10 10 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 2 2 2 1 1 1 1 5 5 5 5 5 5 5 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 35 35 20 15 10 8 2 45 45 30 25 20 15 5 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 52 47 30 21 16 13 6 80 80 55 40 35 30 20 Output Voltage Set Point 1 Symbol Units Vout 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V V mV Load Regulation Line Regulation Regulation Over Temperature (-40° to 85° C) Total Output Voltage Regulation (-40° to 85° C) mV mV mV Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 1. Vin=12V,lout=half load,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 3 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Specifications Parameter Module Symbol Min Typical Max 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 60 60 50 40 35 35 35 80 80 70 60 60 60 60 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 25 20 15 15 15 10 10 35 35 25 25 25 20 20 Output Ripple and Noise 2 Units mVp-p Output Ripple and Noise 2 mVrms Output Current Range All Iout 0 2 A Output DC Current Limit All Ioutlim 2.5 6 A A2s Ioutsurge Shor t Circuit Surge 0.4 0.4 0.4 0.5 0.5 0.5 0.55 0.8 0.8 0.8 1.0 1.0 1.0 1.1 70 20 100 40 10 20 ms All 0 3 % 1.5V - 5.0V 0.9V - 1.2V 0 0 3 10 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Ton Turn on Time ms 0.9V - 3.63V 5.0V Turn on Time3 Ton Overshoot at Turn On Overshoot at Turn On3 Output Capacitance % All Cout 100 1000 µF Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 2. 0 - 20MHz BW with 100uF tan cap and 1uF ceramic cap. 3. For fast startup modules. ©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 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Specifications Parameter Transient Response Module Symbol Min Typical Max Units 150 200 mV 100 140 µs 150 200 mV 100 140 µs 120 150 mV 40 60 µs 120 150 mV 40 60 µs 100 130 mV 40 60 µs 100 130 mV 40 60 µs 90 120 mV 40 60 µs 90 120 mV 40 60 µs 3 ∆V 50% to 100% of Max Load Settling Time Ts 5.0V ∆V 100% to 50% of Max Load Settling Time Transient Response Ts 3 ∆V 50% to 100% of Max Load Settling Time Ts 3.3V ∆V 100% to 50% of Max Load Settling Time Transient Response Ts 3 ∆V 50% to 100% of Max Load Settling Time Ts 2.5V ∆V 100% to 50% of Max Load Settling Time Transient Response Ts 3 ∆V 50% to 100% of Max Load Settling Time Ts 1.8V ∆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=0.1A/uS,Ta=25° C with 220uF/10V Tan cap. ©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 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Specifications Parameter Module Symbol Min Typical Max Units 80 110 mV 40 60 µs 80 110 mV 40 60 µs 70 100 mV 40 60 µs 70 100 mV 40 60 µs 60 90 mV 40 60 µs 60 90 mV 40 60 µs 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 Ts 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=0.1A/uS,Ta=25° C with 220uF/10V Tan cap. ©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 6 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A General Specifications Parameter Module Symbol Min Typical 86 85 83 79 75 71 67 89 88 86 82 78 74 70 210 280 250 320 Max Units η Efficiency1 % 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Switching Frequency Fsw kHz 0.9V ~ 3.3V 5.0V Output Voltage Trim Range (Wide Trim)2 290 360 0.9V Output Voltage Trim Range (Narrow Trim)2 403 90 90 90 90 90 90 -- 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Weight % % 110 110 110 110 110 110 110 4.9 All g 1. Efficiency is measured at Vin=12V, full load and Ta=25° C. 2. See graphs on pages 17-25. 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 2.8 13.2 V 3. With remote on/off pin 1 open, unit 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 7 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Efficiency Data MODULE 3.3V MODULE 5.0V 85% 80% 10.8 75% 12 70% 13.2 EFFICIENCY EFFICIENCY 90% 65% 60% 0.20 0.50 1.00 1.50 2.00 95% 90% 85% 80% 75% 70% 65% 60% 55% 0.20 10.8 12 13.2 0.50 OUTPUT CURRENT 10.8 80% 12 70% 13.2 60% 1.50 2.00 OUTPUT CURRENT ©2005 Bel Fuse Inc. EFFICIENCY EFFICIENCY 90% 1.00 2.00 MODULE 1.8V 100% 0.50 1.50 OUTPUT CURRENT MODULE 2.5V 50% 0.20 1.00 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.20 10.8 12 13.2 0.50 1.00 1.50 2.00 OUTPUT CURRENT 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 POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Efficiency Data EFFICIENCY MODULE 1.5V 85% 80% 75% 70% 65% 60% 55% 50% 45% 0.20 10.8 12 13.2 0.50 1.00 1.50 2.00 OUTPUT CURRENT MODULE 1.2V EFFICIENCY 85% 75% 10.8 65% 12 13.2 55% 45% 0.20 0.50 1.00 1.50 2.00 OUTPUT CURRENT MODULE 0.9V EFFICIENCY 80% 70% 10.8 12 60% 13.2 50% 40% 0.20 0.50 1.00 1.50 2.00 OUTPUT CURRENT ©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 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Ripple and Noise With 100µF tan cap and 1uF ceramic cap at the output. Ripple and noise at full load and 12Vdc input, 5.0Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 2.5Vdc output and Ta=25° C ©2005 Bel Fuse Inc. Ripple and noise at full load and 12Vdc input, 3.3Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 1.8Vdc 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 10 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Ripple and Noise With 100µF tan cap and 1uF ceramic cap at the output. Ripple and noise at full load and 12Vdc input, 1.5Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 1.2Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 0.9Vdc output 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 11 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Transient Response Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor. Vout=5.0V 50% to 100% load transients at 12V input and Ta=25° C Vout=3.3V 50% to 100% load transients at 12V input and Ta=25° C ©2005 Bel Fuse Inc. Vout=5.0V 100% to 50% load transients at 12V input and Ta=25° C Vout=3.3V 100% to 50% load transients at 12V input 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 12 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Transient Response Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor.. Vout=2.5V 50% to 100% load transients at 12V input and Ta=25° C Vout=2.5V 100% to 50% load transients at 12V input and Ta=25° C Vout=1.8V 50% to 100% load transients at 12V input and Ta=25° C Vout=1.8V 100% to 50% load transients at 12V 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 13 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Transient Response Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor.. Vout=1.5V 50% to 100% load transients at 12V input and Ta=25° C Vout=1.5V 100% to 50% load transients at 12V input and Ta=25° C Vout=1.2V 50% to 100% load transients at 12V input and Ta=25° C Vout=1.2V 100% to 50% load transients at 12V input and Ta=25° C Vout=0.9V 50% to 100% load transients at 12V input and Ta=25° C Vout=0.9V 100% to 50% load transients at 12V 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 14 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Thermal Considerations Vin = 12V xRAH-02A1Ax 0.9 ~ 3.3V xRAH-02A50x ©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 15 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A1Ax Trim Resistor Calculation 50 50 45 Trim resistor value,Rtrim_up(Kohm) 40 35 30 Rtrimup(Vadj_up) 25 20 15 10 5 Rtrim up = ( 3.712 Vo, adj – Vo 0 0 0.9 1.17 1.45 1.72 1.99 2.26 2.54 2.81 3.08 3.36 3.63 ) Kohm 0.9 Vadj_up Adjusted output voltage Vo,adj(V) 3.63 Note: Output voltage Vo=0.90 3V when trim pin is not connected. VO Rt Trim Rt (Kohm) = ( Vt Rs (4.64Vt - 3.712) 3.712 - Rs(Vout - 0.903) ) Kohm Rs Note: Output voltage Vo=0.90 3V when trim pin is not connected. GND Rset = ( 3.712 Vout - 0.903 ) Kohm Vout is desired output voltage. VO Rdown Rup = ( 3.712 Rset Rset • Vm up - 0.903 Rset - 3.712 ) Kohm Margin up value after output voltage is set with Rset Trim Rup Rset Rdown = GND ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 ( 4.64 Rset • Vm down - 3.712 Rset 0.903 Rset + 3.712 - Rset • Vm down Margin down value after output volatge is set with Rset Vm down > 90% Vout Note: Output voltage Vo=0.90 3V when trim pin 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 page 16 ) Kohm NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Output Voltage Set-Point Adjustment Trim Up Test Circuit Vo Trim Gnd xRAH-02A090 Trim Resistor Calculation Rtrim _ up = 3.712 Kohm Vo , adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=0.903V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up (Kohm) 1000 1000 900 800 700 600 500 Rtrimup ( Vadj_up ) 400 300 200 100 0 0 0.9 0.909 0.918 0.927 0.936 0.945 0.954 0.963 0.972 0.981 0.99 Vadj_up Adjusted output voltage Vo,adj(V) 0.9 0.99 ©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 17 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Voltage Set-Point Adjustment Trim Down Test Circuit Trim Up Test Circuit Vo Vo Trim Trim Gnd Gnd xRAH-02A120 Trim Resistor Calculation 1.87 Rtrim _ down = − 4.64 Kohm Vo − Vo , adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.203V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) 100 90 80 70 60 50 40 30 20 10 0 1.08 1.09 1.1 1.21 1.22 1.12 1.13 1.14 1.15 1.16 1.18 Adjusted output voltage Vo,adj (V) 1.19 1.2 1.24 1.25 1.26 1.27 1.28 Adjusted output voltage Vo,adj(V) 1.31 1.32 Rtrim _ up = 3.712 Kohm Vo , adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.203V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 500 452 404 356 308 260 212 164 116 68 20 ©2005 Bel Fuse Inc. 1.2 1.3 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 18 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A150 Trim Resistor Calculation 3.2633 Rtrim _ down = − 4.64 Kohm 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) 500 450 400 350 300 250 200 150 100 50 0 1.35 1.37 1.38 1.4 1.41 1.43 1.44 1.46 1.47 Adjusted output voltage Vo,adj (V) 1.49 1.5 3.712 Rtrim _ up = Kohm 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) 1000 900 800 700 600 500 400 300 200 100 0 1.5 1.51 1.53 1.54 1.56 1.58 1.59 1.61 Adjusted output voltage Vo,adj(V) ©2005 Bel Fuse Inc. 1.62 1.64 1.65 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 19 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A180 Trim Resistor Calculation Rtrim _ down = 4.6538 − 4.64 Kohm Vo − Vo , adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.803V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) 500 450 400 350 300 250 200 150 100 50 0 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 1.8 1.84 1.85 1.87 1.89 1.91 1.93 Adjusted output voltage Vo,adj(V) 1.96 1.98 3.712 Rtrim _ up = Kohm Vo , adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.803V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 500 450 400 350 300 250 200 150 100 50 0 ©2005 Bel Fuse Inc. 1.8 1.82 1.94 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 20 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A250 Trim Resistor Calculation Rtrim _ down = 7.9117 − 4.64 Kohm 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(Kohm) 500 450 400 350 300 250 200 150 100 50 0 2.25 2.27 2.3 2.52 2.55 2.33 2.35 2.38 2.4 2.42 2.45 Adjusted output voltage Vo,adj (V) 2.48 2.5 2.73 2.75 Rtrim _ up = 3.712 Kohm 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(Kohm) 500 450 400 350 300 250 200 150 100 50 0 2.5 2.58 2.6 2.63 2.65 2.67 Adjusted output voltage Vo,adj(V) ©2005 Bel Fuse Inc. 2.7 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 21 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A330 Trim Resistor Calculation 11 .614 Rtrim _ down = − 4.64 Kohm Vo − Vo , adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.303V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) 500 450 400 350 300 250 200 150 100 50 0 2.97 3 3.04 3.33 3.37 3.07 3.1 3.13 3.17 3.2 3.23 Adjusted output voltage Vo,adj (V) 3.27 3.3 3.6 3.63 Rtrim _ up = 3.712 Kohm Vo , adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.303V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 500 450 400 350 300 250 200 150 100 50 0 ©2005 Bel Fuse Inc. 3.3 3.4 3.43 3.46 3.5 3.53 Adjusted output voltage Vo,adj(V) 3.56 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 22 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A50x Trim Resistor Calculation 26 .02 Rtrim _ down = − 13 .69 Kohm Vo − Vo , adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=5.003V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) 500 450 400 350 300 250 200 150 100 50 0 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 Adjusted output voltage Vo,adj (V) 4.9 4.95 5 5.05 5.1 5.15 5.2 5.25 5.3 5.35 Adjusted output voltage Vo,adj(V) 5.4 5.45 5.5 4.952 Rtrim _ up = − 7.5 Kohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=5.003V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 500 450 400 350 300 250 200 150 100 50 0 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 23 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A Mechanical SRAH-02A 0.70 [17.78] 0.60 [15.24] 0.050 [1.27] 0.137 [3.48] 0.320 [8.13] 0.012 [0.30] 2 x 4˚ 0.050 ±0.002 [1.27 ±0.05] 0.100 [2.54] 4x 0.400 [10.16] 0.400 [10.16] 0.055 [1.40] 0.020 ±0.002 [0.51 ±0.05] 0.780 [19.81] 0.090 [2.29] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. ©2005 Bel Fuse Inc. Pin Function 1 Remote On/Off 2 +Vin 3 Ground 4 +Vo 5 Trim 6 No Connection 7 No Connection 1 2 3 4 5 7 6 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 24 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 12V Input / 0.9V – 5.0V Output / 2A BP05xRAH-02A 0.700 [17.78] Mechanical VRAH-02A 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] 0.137 [3.47] 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 25