NON-ISOLATED DC/DC CONVERTERS 5V Input / 1.2V – 3.3V Output / 12A POWER PRODUCTS BP02S7DB-12B S7DB-12B 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-12B 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. 12A maximum output is also provided. Standard features include remote on/off, remote sense, 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 12A 39.6W 92% S7DB-12B330 2.5V 5V 12A 30.0W 90% S7DB-12B250 1.8V 5V 12A 21.6W 86% S7DB-12B180 1.5V 5V 12A 18.0W 84% S7DB-12B150 1.2V 5V 12A 14.4W 82% S7DB-12B120 ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 12A BP02S7DB-12B 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 Input Current A Iin 11.2 8.7 6.6 5.5 4.5 3.3V 2.5V 1.8V 1.5V 1.2V No Load Input Current All Remote Off Input Current mA 50 10 20 mA Input Reflected Ripple Current1 All 40 80 mArms Input Reflected Ripple Current (P-P)1 All 140 280 mApk I2t Inrush Current Transient All 0.1 0.2 A2s Turn On Voltage Threshold All 4.3 4.5 V Turn Off Voltage Threshold All 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. ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 12A BP02S7DB-12B 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 6.0 6.0 6.0 6.0 6.0 12 12 10 10 10 All 2.0 5 3.3V 2.5V 1.8V 1.5V 1.2V 22 17 12 10 8 45 34 25 20 17 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 mV Regulation Over Temperature mV Total Output Voltage Regulation 62 51 40 35 32 3.3V 2.5V 1.8V 1.5V 1.2V Output Ripple and Noise 2 All 30 60 mVp-p 2 All 10 25 mVrms Output Ripple and Noise Output Current Range All Iout 0 12 A Output DC Current Limit All Ioutlim 15.6 30 A Shor t Circuit Surge A 2s Ioutsurge 3.3V 2.5V 1.8V 1.5V 1.2V Turn on Time All Overshoot at Turn On All Output Capacitance All Ton Cout 0 0.25 0.3 0.35 0.45 0.5 0.5 0.6 0.7 0.9 1 12 20 ms 0 3% V 4800 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. ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 12A BP02S7DB-12B Output Specifications Parameter Module Transient Response Symbol Min Typical Max Units 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 µs 90 120 mV 35 70 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. ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 12A BP02S7DB-12B General Specifications Parameter Module Symbol Min Typical 89 87 83 81 89 92 90 86 84 82 260 300 Max Units η Efficiency1 % 3.3V 2.5V 1.8V 1.5V 1.2V Switching Frequency All Output Voltage Trim Range2 All Remote Sense Compensation All Weight All Fsw kHz 340 90 % 110 % 10 10.5 g 1. Vin=5V, full load and Ta=25° C. 2. See graphs on pages 10-12. 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. ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 12A BP02S7DB-12B Efficiency Data Module 3.3V Module 2.5V 98% 97% Efficiency Efficiency 96% 4.5V 95% 5.0V 94% 5.5V 93% 92% 91% 97% 96% 95% 94% 93% 92% 91% 90% 89% 88% 87% 90% 4.5V 5.0V 5.5V 1 1 2 3 4 2 3 4 5 5 6 7 8 9 10 11 12 13 Output Current 6 7 8 9 10 11 12 13 Output Current Efficiency Module 1.8V 95% 94% 93% 92% 91% 90% 89% 88% 87% 86% 85% 84% 83% 4.5V 5.0V 5.5V 1 2 3 4 5 6 7 8 9 10 11 12 13 Output Current Module 1.2V 94% 93% 92% 91% 90% 4.5V 88% 5.0V 5.5V 86% Efficiency Efficiency Module 1.5V 89% 4.5V 87% 5.0V 85% 5.5V 83% 84% 81% 82% 79% 1 2 3 4 5 6 7 8 9 10 11 12 13 Output Current ©2004 Bel Fuse Inc. 1 2 3 4 5 6 7 8 9 10 11 12 13 Output Current Specifications subject to change without notice. 03.04 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 5V Input / 1.2V – 3.3V Output / 12A POWER PRODUCTS BP02S7DB-12B 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 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 Ripple and noise at full load and 5Vdc input, 1.2Vdc output and Ta=25° C ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 1.2V – 3.3V Output / 12A BP02S7DB-12B Transient Response Transient response: di/dt = 0.5A/µS, no external load 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 ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 12A POWER PRODUCTS BP02S7DB-12B 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 Thermal Considerations ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com page 9 NON-ISOLATED DC/DC CONVERTERS POWER PRODUCTS 5V Input / 1.2V – 3.3V Output / 12A BP02S7DB-12B Output Voltage Set-Point Adjustment Trim Down Test Circuit Trim Up Test Circuit Vo Vo Trim Trim Gnd Gnd Output Voltage Set-Point Adjustment Rtrim_ down = ( 7.964 − 6.82) Kohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.312V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) S7DB-12B330 Trim Resistor Calculation 270 240 210 180 150.01 120.01 90.01 60.01 30.01 Rtrim_ up = ( 2.536 − 3.65) Kohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.312V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 0.01 2.97 3.04 3.07 3.1 3.13 3.17 3.2 3.23 Adjusted output voltage Vo,adj (V) 3.27 3.3 3.33 3.37 3.4 3.43 3.46 3.5 3.53 3.56 Adjusted output voltage Vo,adj(V) 3.6 3.63 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 3.3 ©2004 Bel Fuse Inc. 3 Specifications subject to change without notice. 03.04 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 POWER PRODUCTS 5V Input / 1.2V – 3.3V Output / 12A BP02S7DB-12B Output Voltage Set-Point Adjustment Rtrim _ down = ( 3.691 − 6.8) Kohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.509V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) S7DB-12B250 Trim Resistor Calculation 270 240 210 180 150.01 120.01 90.01 60.01 30.01 1.728 Rtrim_ up = ( − 4.64) Kohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.509V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 0.01 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 2.52 2.55 2.58 2.6 2.63 2.65 2.67 Adjusted output voltage Vo,adj(V) 2.73 2.75 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 1.94 Adjusted output voltage Vo,adj(V) 1.96 1.98 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 2.5 2.7 3.869 Rtrim _ down = ( − 13.84) Kohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.808V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) S7DB-12B180 Trim Resistor Calculation 270 240 210 180 150.01 120.01 90.01 60.01 30.01 Rtrim _ up = ( 3.072 −10) Kohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.808V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 0.01 1.62 1.64 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 1.8 1.82 ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 / 12A BP02S7DB-12B Output Voltage Set-Point Adjustment Rtrim _ down = ( 2.716 − 11.71) Kohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.507V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) S7DB-12B150 Trim Resistor Calculation 270 240 210 180 150.01 120.01 90.01 60.01 30.01 Rtrim _ up = ( Trim resistor value,Rtrim_up(Kohm) 0.01 1.35 1.37 3.072 − 7.87) Kohm Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.507V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. 1.38 1.4 1.41 1.43 1.44 1.46 1.47 Adjusted output voltage Vo,adj (V) 1.49 1.5 1.64 1.65 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 1.5 1.51 1.53 1.54 1.56 1.58 1.59 1.61 Adjusted output voltage Vo,adj(V) 1.62 1.562 Rtrim _ down = ( − 8.48) Kohm Vo − Vo, adj where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.207V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Trim resistor value Rtrim_down(Kohm) S7DB-12B120 Trim Resistor Calculation 270 240 210 180 150.01 120.01 90.01 60.01 30.01 3.072 − 4.64) Kohm Rtrim _ up = ( Vo, adj − Vo where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.207V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. Trim resistor value,Rtrim_up(Kohm) 0.01 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 1.24 1.25 1.26 1.27 1.28 Adjusted output voltage Vo,adj(V) 1.31 1.32 270 240 210 180 150.01 120.01 90.01 60.01 30.01 0.01 ©2004 Bel Fuse Inc. 1.2 1.21 1.22 1.3 Specifications subject to change without notice. 03.04 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 / 12A BP02S7DB-12B Mechanical 1.22 [30.99] Suggested PCB Pad Layout 0.394 [10.01] 0.197 [5.00] 0.895 [22.73] 0.67 [17.00] 0.100 [2.54] 0.120 [3.05] 0˚- 5˚ 0.004 [0.10] 5X 0.197 [5.00] 0.985 [25.02] 6X 0.102 [2.59] 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 0.345 [8.76] 0.010 [0.25] 2X 0.050 [1.27] 2X 0.079 [1.99] 0.827 [21.01] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. 12 11 10 9 8 7 3 4 5 6 1 2 ©2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04 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 13