NON-ISOLATED DC/DC CONVERTERS 5V Input / 1.2V – 3.3V Output / 8A POWER PRODUCTS BP02S7DB-08B S7DB-08B 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 • Remote sense Description The Bel S7DB-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 1.2V to 3.3V. They are packaged in a compact, low profile, surface mount DIP package for ease of layout and space savings. 8A maximum output is also provided. Standard features include remote on/off, over current and short circuit protection, UVLO 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 3.3V 5V 8A 26.4W 93% S7DB-08B330 2.5V 5V 8A 20W 91% S7DB-08B250 1.8V 5V 8A 14.4W 87% S7DB-08B180 1.5V 5V 8A 12W 86% S7DB-08B150 1.2V 5V 8A 9.6W 83% S7DB-08B120 ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-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 -55 100 °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 Typical Max Units All Vin 4.5 5 5.5 V Iin 3.3V 2.5V 1.8V 1.5V 1.2V Input Current No Load Input Current All 7.2 5.6 4.6 3.9 3.0 50 A mA Remote Off Input Current 4 8 mA Input Reflected Ripple Current1 30 50 mArms Input Reflected Ripple Current (P-P)1 60 100 mApk I2t Inrush Current Transient 0.05 0.07 A2s Turn On Voltage Threshold 4.3 4.5 V Turn Off Voltage Threshold 3.85 4.49 V Note: Input capacitance two 270µF/10V, ESR = 0.018 Ω max at 100kHz @ 25° C. 1. With simulated source impedance of 500nH, 5Hz to 20MHz. ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B 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 4.0 4.0 3.0 3.0 3.0 10 10 8 8 8 All 2.0 5 3.3V 2.5V 1.8V 1.5V 1.2V 20 15 12 10 10 40 30 25 20 20 Output Voltage Set Point 1 Symbol Units Vout 3.3V 2.5V 1.8V 1.5V 1.2V V mV Load Regulation Line Regulation mV Regulation Over Temperature mV mV Total Output Voltage Regulation 55 45 38 33 33 3.3V 2.5V 1.8V 1.5V 1.2V 2 All 30 50 mVp-p Output Ripple and Noise 2 All 10 20 mVrms Output Current Range Al l Iout 0 8 A Output DC Current Limit Al l Ioutlim 10.4 20 A Output Ripple and Noise Shor t Circuit Surge A2s Ioutsurge 3.3V 2.5V 1.8V 1.5V 1.2V Turn on Time All Overshoot at Turn On Al l Output Capacitance Al l Ton Cout 0 0.1 0.3 0.4 0.5 0.6 0.3 0.6 0.8 1.0 1.2 12 20 ms 0 3 % 3200 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. ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B Output Specifications Parameter Module Transient Response Symbol Min Typical Max Units 90 120 mV 25 50 µs 90 120 mV 25 50 µs 90 120 mV 25 50 µs 90 120 mV 25 50 µs 70 100 mV 25 50 µs 70 100 mV 25 50 µs 70 100 mV 25 50 µs 70 100 mV 25 50 µs 70 100 mV 25 50 µs 70 100 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. ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B General Specifications Parameter Module Symbol Min Typical 90 88 84 83 80 93 91 87 86 83 Fsw 260 300 3.3V 2.5V 1.8V 1.5V 1.2V 70 70 90 90 90 Max Units η Efficiency1 % 3.3V 2.5V 1.8V 1.5V 1.2V Switching Frequency All 340 kHz All Output Voltage Trim Range2 Remote Sense Compensation All Weight All % 110 110 120 120 110 10 % 10.5 g 1. Vin=5.0V, full load and Ta=25° C. 2. See graphs on pages 12-14. 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 2.5 5.5 V 3. With remote on/off pin 8 open, the module is on. Note: On/off pin designed to work with an open collector/drain switch. ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B Efficiency Data Module 3.3V 97.0% 96.0% 95.0% 4.5V 94.0% 5.0V 93.0% 5.5V 92.0% 91.0% 90.0% 1 2 3 4 5 6 7 8 Module 2.5V 95.0% 94.0% 93.0% 92.0% 4.5V 91.0% 5.0V 90.0% 5.5V 89.0% 88.0% 87.0% 1 2 3 4 5 6 7 8 Module 1.8V 94.0% 92.0% 90.0% 88.0% 86.0% 84.0% 82.0% 80.0% 4.5V 5.0V 5.5V 1 ©2002 Bel Fuse Inc. 2 3 4 5 6 7 8 Specifications subject to change without notice. 06.02 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 5V Input / 1.2V – 3.3V Output / 8A BP02S7DB-08B Efficiency Data Module 1.5V 92.0% 91.0% 90.0% 89.0% 88.0% 87.0% 86.0% 85.0% 84.0% 4.5V 5.0V 5.5V 1 2 3 4 5 6 7 8 Module 1.2V 90.0% 88.0% 4.5V 5.0V 86.0% 5.5V 84.0% 82.0% 1 2 3 4 5 6 7 8 ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 5V Input / 1.2V – 3.3V Output / 8A BP02S7DB-08B Ripple and Noise 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, 2.5Vdc output and Ta=25° C Ripple and noise at full load and 5Vdc input, 1.8Vdc output and Ta=25° C ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A POWER PRODUCTS BP02S7DB-08B Ripple and Noise 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 ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B Transient Response Transient response: di/dt = 0.5A/µS Vout=3. 3V 50% to 100% load transients at 5V input and Ta=25° C Vout=2.5V 50% to 100% load transients at 5V input and Ta=25° C ©2002 Bel Fuse Inc. Vout=3.3V 100% to 50% load transients at 5V input and Ta=25° C Vout=2.5V 100% to 50% load transients at 5V input and Ta=25° C Specifications subject to change without notice. 06.02 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 / 1.2V – 3.3V Output / 8A POWER PRODUCTS BP02S7DB-08B Transient Response Transient response: di/dt = 0.5A/µS Vout=1.8V 50% to 100% load transients at 5V input and Ta=25° C Vout=1.5V 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 Vout=1.5V 100% to 50% load transients at 5V input and Ta=25° C ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 11 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 1.2V – 3.3V Output / 8A BP02S7DB-08B Transient Response Transient response: di/dt = 0.5A/µS 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 Thermal Considerations 100LFM 200LFM Derating Curve 300LFM Output Current (A) 8 6 4 Natural Convection 2 0 0 30 60 65 70 75 80 85 Ambient Temperature, Ta (˚C) Output Current vs. Local Ambient Temperature and Air Velocity ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B Output Voltage Set-Point Adjustment Trim Down Test Circuit Trim Up Test Circuit Vo Vo Trim Trim Gnd Gnd Rtrim down = ( 7.964 – 6.82) Kohm Vo – Vo, adj Trim resistor value Rtrim down (Kohm) S7DB-08B330 Trim Resistor Calculation 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 2.31 2.41 2.51 2.61 2.71 2.8 2.9 3 3.1 3.2 3.3 Rtrim up = ( 2.536 – 3.65) Kohm Vo, adj – Vo Trim resistor value Rtrim up (Kohm) Adjusted Output Voltage Vo,adj (V) 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 3.3 3.33 3.37 3.4 3.43 3.46 3.5 3.53 3.56 3.6 3.63 Adjusted Output Voltage Vo,adj (V) ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B S7DB-08B250 Trim Resistor Calculation Rtrim down = ( 3.691 – 4.12) Kohm Vo – Vo, adj Trim resistor value Rtrim down (Kohm) Output Voltage Set-Point Adjustment 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 1.75 1.83 1.9 1.98 2.05 2.13 2.2 2.27 2.35 2.42 2.5 Adjusted Output Voltage Vo,adj (V) Rtrim up = ( Trim resistor value Rtrim up (Kohm) 270 1.728 – 1.96) Kohm Vo, adj – Vo 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 2.5 2.52 2.55 2.58 2.6 2.63 2.65 2.67 2.7 2.73 2.75 Trim resistor value Rtrim down (Kohm) Adjusted Output Voltage Vo,adj (V) 270 240 210 180 S7DB-08B180 Trim Resistor Calculation 150.01 120.01 Rtrim down = 90.01 60.01 ( 1.52 – 4.12) Kohm Vo – Vo, adj 30.01 0.01 1.62 1.64 1.66 1.67 1.69 1.71 1.73 1.75 1.76 1.78 1.8 Trim resistor value Rtrim up (Kohm) Adjusted Output Voltage Vo,adj (V) 270 240 210 180 150.01 Rtrim up = 120.01 ( 1.208 – 2.61) Kohm Vo, adj – Vo 90.01 60.01 30.01 0.01 1.8 1.84 1.87 1.91 1.94 1.98 2.02 2.05 2.09 2.12 2.16 Adjusted Output Voltage Vo,adj (V) ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 8A BP02S7DB-08B Output Voltage Set-Point Adjustment S7DB-08B150 Trim Resistor Calculation Rtrim down = ( 0.749 – 3.21) Kohm Vo – Vo, adj Trim resistor value Rtrim down (Kohm) 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 1.47 1.49 1.5 Rtrim up = ( 0.848 – 2.15) Kohm Vo, adj – Vo Trim resistor value Rtrim up (Kohm) Adjusted Output Voltage Vo,adj (V) 270 240 210 180 150.01 120.01 90.01 60.01 30.01 Trim resistor value Rtrim down (Kohm) 0.01 1.5 1.53 1.56 1.59 1.62 1.65 1.68 1.71 Adjusted Output Voltage Vo,adj (V) 1.74 1.77 1.8 S7DB-08B120 Trim Resistor Calculation 270 240 210 180 150.01 Rtrim down = 120.01 90.01 ( 1.562 – 8.48) Kohm Vo – Vo, adj 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 1.2 Trim resistor value Rtrim up (Kohm) Adjusted Output Voltage Vo,adj (V) 270 240 210 180 Rtrim up = 150.01 ( 3.064 – 4.64) Kohm Vo, adj – Vo 120.01 90.01 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) ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 / 1.2V – 3.3V Output / 8A BP02S7DB-08B Mechanical 0.827 [21.00] 0.118 [3.00] 0.197 [5.00] 0.079 [2.00] 1.22 [31.00] 0.345 [8.75] Pin Function 1 Ground 2 Ground 3 Ground 4 Ground 5 +Vin 6 +Vin 7 Trim 8 Remote On/Off 9 Remote Sense 10 +Vo 11 +Vo 12 +Vo 0.669 [17.00] 0.102 [2.60] 12 11 10 9 8 7 1 2 3 4 5 6 ©2002 Bel Fuse Inc. Specifications subject to change without notice. 06.02 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 16