VRAH-02A500

NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A 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 POWER PRODUCTS BP05xRAH-02A 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 Data networking equipment • • Telecommunications Computers and peripherals Part Number Selection Output Voltage 5.0V 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V 0.9 ~ 3.63V 0.9 ~ 3.63V Input Voltage 12V 12V 12V 12V 12V 12V 12V 12V 12V 12V Max. Output Current 2A 2A 2A 2A 2A 2A 2A 2A 2A 2A Max. Output Power 10W 10W 6.6W 5.0W 3.6W 3.0W 2.4W 1.8W 7.3W 7.3W Typical Efficiency 89% 89% 88% 86% 82% 78% 74% 70% 70% 70% Part Number Surface Mount SRAH-02A500 SRAH-02A50F* SRAH-02A330 SRAH-02A250 SRAH-02A180 SRAH-02A150 SRAH-02A120 SRAH-02A090 SRAH-02A1A0 SRAH-02A1AF* Part Number Vertical Mount VRAH-02A500 VRAH-02A50F* VRAH-02A330 VRAH-02A250 VRAH-02A180 VRAH-02A150 VRAH-02A120 VRAH-02A090 VRAH-02A1A0 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 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Absolute Maximum Ratings Parameter Continuous Input Voltage Output Enable Terminal Voltage Ambient Temperature Storage Temperature Symbol Vin Vouten Tamb Tstor Min -0.3 -0.3 -40 -55 Typical Max 15 15 85 125 Unit V V °C °C 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 Input Current 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V No Load Input Current Remote Off Input Current Input Reflected Ripple Current1 Input Reflected Ripple Current (P-P)1 I2t Inrush Current Transient Turn On Voltage Threshold Turn Off Voltage Threshold All All All All All All All 8.8 3 100 300 0.01 9.6 9.8 0.02 Module All Symbol Vin Iin 1.2 0.85 0.7 0.5 0.45 0.4 0.35 50 10 mA mA mArms mApk A2s V V Min 10.8 Typical Max 13.2 Units V A 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 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Output Specifications Parameter Output Voltage Set Point 1 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Load Regulation 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Line Regulation 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Regulation Over Temperature (-40° to 85° C) 2 2 2 1 1 1 1 5 5 5 5 5 5 5 mV 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 mV 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 15 10 8 5 5 4 3 30 30 20 10 10 10 10 mV Module Symbol Vout 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 mV Min Typical Max Units V Total Output Voltage Regulation (-40° to 85° C) 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 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Output Specifications Parameter Output Ripple and Noise 2 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Output Ripple and Noise 2 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Output Current Range Output DC Current Limit Shor t Circuit Surge 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Turn on Time 0.9V - 3.63V 5.0V Turn on Time3 Overshoot at Turn On Overshoot at Turn On3 1.5V - 5.0V 0.9V - 1.2V Output Capacitance All Cout 100 0 0 3 10 1000 µF All Ton Ton 70 20 10 0 100 40 20 3 ms % % All All Iout Ioutlim Ioutsurge 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 ms 0 2.5 25 20 15 15 15 10 10 35 35 25 25 25 20 20 2 6 A A A2s 60 60 50 40 35 35 35 80 80 70 60 60 60 60 mVrms Module Symbol Min Typical Max Units mVp-p 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 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Output Specifications Parameter Transient Response 3 Module Symbol Min Typical Max Units ∆V 50% to 100% of Max Load Settling Time 5.0V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 150 Ts 100 150 Ts 100 200 140 200 140 mV µs mV µs ∆V 50% to 100% of Max Load Settling Time 3.3V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 120 Ts 40 120 Ts 40 150 60 150 60 mV µs mV µs ∆V 50% to 100% of Max Load Settling Time 2.5V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 100 Ts 40 100 Ts 40 130 60 130 60 mV µs mV µs ∆V 50% to 100% of Max Load Settling Time 1.8V ∆V 100% to 50% of Max Load Settling Time Ts Ts 90 40 90 40 120 60 120 60 mV µs mV µs 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 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Output Specifications Parameter Transient Response 3 ∆V 50% to 100% of Max Load Settling Time 1.5V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 ∆V 50% to 100% of Max Load Settling Time 1.2V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 ∆V 50% to 100% of Max Load Settling Time 0.9V ∆V 100% to 50% of Max Load Settling Time Ts 60 40 90 60 mV µs Ts 60 40 90 60 mV µs Ts 70 40 100 60 mV µs Ts 70 40 100 60 mV µs Ts 80 40 110 60 mV µs Ts 80 40 110 60 mV µs Module Symbol Min Typical Max Units 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 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A General Specifications Parameter Efficiency1 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V Switching Frequency 0.9V ~ 3.3V 5.0V Output Voltage Trim Range (Wide Trim)2 Output Voltage Trim Range (Narrow Trim)2 0.9V Fsw 210 280 250 320 290 360 403 % % Module Symbol η 86 85 83 79 75 71 67 89 88 86 82 78 74 70 kHz Min Typical Max Units % 5.0V 3.3V 2.5V 1.8V 1.5V 1.2V 0.9V All 90 90 90 90 90 90 -4.9 110 110 110 110 110 110 110 Weight 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 Signal Low (Unit Off) Signal High (Unit On) Module All All All Symbol Vouten -0.3 2.8 1 13.2 Min Typical Max Units V V 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 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Efficiency Data MODULE 5.0V 90% EFFICIENCY 80% 75% 70% 65% 60% 0.20 0.50 1.00 1.50 2.00 10.8 12 13.2 EFFICIENCY 95% 90% 85% 80% 75% 70% 65% 60% 55% 0.20 MODULE 3.3V 85% 10.8 12 13.2 0.50 1.00 1.50 2.00 OUTPUT CURRENT OUTPUT CURRENT MODULE 2.5V 100% EFFICIENCY MODULE 1.8V 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.20 80% 70% 60% 50% 0.20 10.8 12 13.2 EFFICIENCY 90% 10.8 12 13.2 0.50 1.00 1.50 2.00 0.50 1.00 1.50 2.00 OUTPUT CURRENT 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 8 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Efficiency Data MODULE 1.5V 85% 80% 75% 70% 65% 60% 55% 50% 45% 0.20 POWER PRODUCTS BP05xRAH-02A EFFICIENCY 10.8 12 13.2 0.50 1.00 1.50 2.00 OUTPUT CURRENT MODULE 1.2V 85% EFFICIENCY 75% 10.8 65% 55% 45% 0.20 12 13.2 0.50 1.00 1.50 2.00 OUTPUT CURRENT MODULE 0.9V 80% EFFICIENCY 70% 60% 50% 40% 0.20 10.8 12 13.2 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 BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A 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, 3.3Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 2.5Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 1.8Vdc 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 10 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Ripple and Noise With 100µF tan cap and 1uF ceramic cap at the output. POWER PRODUCTS BP05xRAH-02A 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 BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A 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=5.0V 100% to 50% load transients at 12V input and Ta=25° C Vout=3.3V 50% to 100% load transients at 12V input and Ta=25° C Vout=3.3V 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 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 BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A 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 ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Vout=0.9V 100% to 50% load transients at 12V input and Ta=25° C 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 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Output Voltage Set-Point Adjustment xRAH-02A1Ax Trim Resistor Calculation 50 50 45 40 Trim resistor value,Rtrim_up(Kohm) 35 30 Rtrimup(V adj_up) 25 20 15 10 5 00 0.9 1.17 1.45 1.72 1.99 2.26 2.54 2.81 3.08 3.36 3.63 Rtrim up = ( 3.712 Vo, adj – Vo ) Kohm 0.9 V adj_up Adjuste output voltag Vo,adj(V d e ) 3.63 Note: Output voltage Vo=0.90 3V when trim pin is not connected. VO Rt Trim Rs GND Note: Output voltage Vo=0.90 3V when trim pin is not connected. Vt Rt (Kohm) = ( Rs (4.64Vt - 3.712) 3.712 - Rs(Vout - 0.903) ) Kohm Rset = VO Rdown ( 3.712 Vout - 0.903 ) Kohm Vout is desired output voltage. Rup = ( 3.712 Rset Rset • Vm up - 0.903 Rset - 3.712 ) Kohm Trim Rup Rset Margin up value after output voltage is set with Rset Rdown = GND ( 4.64 Rset • Vm down - 3.712 Rset 0.903 Rset + 3.712 - Rset • Vm down ) Kohm 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. ©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 16 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 1000 Trim resistor value,Rtrim_up (Kohm) 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 Rtrim _ up = where, 3.712 Kohm Vo , adj − Vo 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. ©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 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Output Voltage Set-Point Adjustment Trim Down Test Circuit Vo Trim Up Test Circuit Vo Trim Trim Gnd Gnd xRAH-02A120 Trim Resistor Calculation 100 Trim resistor value Rtrim_down(Kohm) 90 80 70 60 50 40 30 20 10 0 1.08 1.09 1.1 1.12 1.13 1.14 1.15 1.16 1.18 Adjusted output voltage Vo,adj (V) 1.19 1.2 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. 500 Trim resistor value,Rtrim_up(Kohm) 452 404 356 308 260 212 164 116 68 20 1.2 1.21 1.22 1.24 1.25 1.26 1.27 1.28 Adjusted output voltage Vo,adj(V) 1.3 1.31 1.32 Rtrim _ up = where, 3.712 Kohm Vo , adj − Vo 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. ©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 18 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A150 Trim Resistor Calculation 500 Trim resistor value Rtrim_down(Kohm) 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 3.2633 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. 1000 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) 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) 1.62 1.64 1.65 ©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 19 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Output Voltage Set-Point Adjustment xRAH-02A180 Trim Resistor Calculation 500 Trim resistor value Rtrim_down(Kohm) 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 Rtrim _ down = where, 4.6538 − 4.64 Kohm Vo − Vo , adj 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. 500 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) 450 400 350 300 250 200 150 100 50 0 1.8 1.82 1.84 1.85 1.87 1.89 1.91 1.93 Adjusted output voltage Vo,adj(V) 1.94 1.96 1.98 ©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 20 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A250 Trim Resistor Calculation 500 Trim resistor value Rtrim_down(Kohm) 450 400 350 300 250 200 150 100 50 0 2.25 2.27 2.3 2.33 2.35 2.38 2.4 2.42 2.45 Adjusted output voltage Vo,adj (V) 2.48 2.5 Rtrim _ down = where, 7.9117 − 4.64 Kohm Vo − Vo , adj 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. 500 Rtrim _ up = where, 3.712 Kohm Vo , adj − Vo Trim resistor value,Rtrim_up(Kohm) 450 400 350 300 250 200 150 100 50 0 2.5 2.52 2.55 2.58 2.6 2.63 2.65 2.67 Adjusted output voltage Vo,adj(V) 2.7 2.73 2.75 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. ©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 21 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Output Voltage Set-Point Adjustment xRAH-02A330 Trim Resistor Calculation 500 Trim resistor value Rtrim_down(Kohm) 450 400 350 300 250 200 150 100 50 0 2.97 3 3.04 3.07 3.1 3.13 3.17 3.2 3.23 Adjusted output voltage Vo,adj (V) 3.27 3.3 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. 500 Rtrim _ up = where, 3.712 Kohm Vo , adj − Vo Trim resistor value,Rtrim_up(Kohm) 450 400 350 300 250 200 150 100 50 0 3.3 3.33 3.37 3.4 3.43 3.46 3.5 3.53 Adjusted output voltage Vo,adj(V) 3.56 3.6 3.63 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. ©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 22 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Output Voltage Set-Point Adjustment xRAH-02A50x Trim Resistor Calculation 500 Trim resistor value Rtrim_down(Kohm) 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 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. 500 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) 450 400 350 300 250 200 150 100 50 0 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 ©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 POWER PRODUCTS BP05xRAH-02A NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A Mechanical SRAH-02A 0.70 [17.78] 0.050 [1.27] 0.137 [3.48] 0.320 [8.13] 0.012 [0.30] 0.60 [15.24] 0.050 ±0.002 [1.27 ±0.05] 0.100 [2.54] 4x 0.400 [10.16] 2 x 4˚ 0.020 ±0.002 [0.51 ±0.05] 0.780 [19.81] 0.055 [1.40] 0.090 [2.29] 0.400 [10.16] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. Pin 1 2 3 4 5 6 7 Function Remote On/Off +Vin Ground +Vo Trim No Connection No Connection 1 2 3 4 5 7 6 ©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 24 NON-ISOLATED DC/DC CONVERTERS 12V Input / 0.9V – 5.0V Output / 2A POWER PRODUCTS BP05xRAH-02A Mechanical VRAH-02A 0.600 [15.24] 0.700 [17.78] 0.050 [1.27] 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 1 2 3 4 5 Function Remote On/Off +Vin Ground +Vo Trim 12345 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 Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST 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 EUROPE 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