NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 5V Output / 1.5A BP05xRAH-02C SRAH-02C / VRAH-02C Modules • Nonisolated • Compact, low profile surface mount package • Fixed frequency* • High efficiency means less power dissipation • Excellent thermal performance • Optimized for cost • Allows burst mode operation at low load currents Description The Bel SRAH-02C and VRAH-02C modules are non-isolated, step up DC/DC power converters that operate from a nominal 3.3V source with an output voltage of 5V. They are packaged in a compact, overmolded package rated at 1.5A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. Standard features include output voltage adjust and industrial temperature range (-40° to +85° C). The output is closely regulated and the efficiency is typically 87% at full load. 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. *Optional Burst/skip mode operating at light load or no load. Applications Options • Distributed power architectures • • Data networking equipment • Telecommunications • Computers and peripherals Trim function Part Number Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Part Number Surface Mount Part Number Vertical Mount 5V 3.3V 1.5A 7.5W 87% SRAH-02C500 VRAH-02C500 Note: For parts with Burst/skip mode disabled, change the last character to a B (e.g. SRAH-02C50B). ©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 / 5V Output / 1.5A BP05xRAH-02C Absolute Maximum Ratings Parameter Continuous Input Voltage Output Enable Terminal Voltage Symbol Min Vin 2.8 Typical Max Unit 4 V Vouten V Ambient Temperature Tamb -40 85 °C Storage Temperature Tstor -40 125 °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 Module Symbol Min Operating Input Voltage All Vin 3 Input Current All Iin Input Reflected Ripple Current1 All Input Reflected Ripple Current (P-P)1 Typical Max Units 3.6 V 3.3 A 30 60 mArms All 100 150 mApk I2t Inrush Current Transient All 0.02 0.05 A2s Turn On Voltage Threshold All 2.8 2.9 V 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. ©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 / 5V Output / 1.5A BP05xRAH-02C Output Specifications Parameter Module Symbol Min Typical Max Units Output Voltage Set Point 1 All Vout 4.825 5 5.175 V Load Regulation All 25 40 mV Line Regulation All 20 30 mV Regulation Over Temperature All 45 80 mV Total Output Voltage Regulation All 150 mV Output Ripple and Noise 2 All 50 100 mVp-p Output Ripple and Noise 2 All 15 25 mVrms Output Current Range All 1.5 A Overshoot at Turn On All 5 % Output Capacitance All 600 µF 100 150 mV 50 100 µs 100 150 mV 50 100 µs Iout 0 0 Cout 0 Transient Response ∆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 on output. General Specifications Parameter Module Symbol Min Typical Efficiency1 All η 84 87 Switching Frequency All Fsw 500 550 Output Voltage Trim Range2 All Weight All 95 Max Units % 650 110 5.2 kHz % g 1. Vin=3.3V, full load and Ta=25° C. 2. See graphs on page 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 3 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 5V Output / 1.5A BP05xRAH-02C Efficiency Data Module 5.0V 89% 88% Efficiency 87% 3.0V 86% 3.3V 85% 3.6V 84% 83% 82% 0.150 0.375 0.750 1.125 1.500 Output current (A) Ripple and Noise 1µF ceramic cap at the output. Ripple and noise at full load and 3.3Vdc input, 5Vdc output and Ta=25° C ©2005 Bel Fuse Inc. Ripple and noise when operating in burst mode at no load and 3.3Vdc input, 5Vdc 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 4 NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V Output / 1.5A POWER PRODUCTS BP05xRAH-02C Transient Response Transient response: di/dt = 0.5A/µS, no external load capacitance Vout=5V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=5V 100% to 50% load transients at 3.3V input and Ta=25° C Thermal Considerations xRAH-02C ©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 / 5V Output / 1.5A BP05xRAH-02C Trim Down Circuit Output Voltage Set-Point Adjustment Vout Rtrim Down Trim Gnd Trim Up Circuit Vout Module Trim Rtrim Up Gnd xRAH-02C Trim Resistor Calculation Rtrim down = Rtrim up = ©2005 Bel Fuse Inc. ( ( 44.144 – 12.5) Kohm Vo – Vo, adj 8.4 – 2) 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 6 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 5V Output / 1.5A BP05xRAH-02C Mechanical SRAH-02C Suggested PCB Pad Layout 0.400 [10.16] 0.60 [15.24] 0.050 [1.27] 0.065 [1.65] 0.110 [2.79] 0.855 [21.72] 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 N/A 2 +Vin 3 Ground 4 +Vo 5 Trim 6 N/A 7 N/A 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 7 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 3.3V Input / 5V Output / 1.5A BP05xRAH-02C 0.700 [17.78] Mechanical VRAH-02C 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 N/A 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 8