SRDB-08C

NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 8A SRDB-08C 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 POWER PRODUCTS BP06SRDB-08C RoHS Compliant Description The Bel SRDB-08C modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal 3.3V source. These converters are available in a range of output voltages from 1.2V to 2.5V. 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 3.3V 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 2.5V 1.8V 1.5V 1.2V Input Voltage 3.3V 3.3V 3.3V 3.3V Max. Output Current 8A 8A 8A 8A Max. Output Power 20W 14.4W 12W 9.6W Typical Efficiency 92% 88% 86% 83% Part Number SRDB-08C250 SRDB-08C180 SRDB-08C150 SRDB-08C120 ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 BP06SRDB-08C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 8A 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 4 4 85 100 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 Module All Symbol Vin Iin Input Current 2.5V 1.8V 1.5V 1.2V All 10 20 60 0.05 2.85 2.3 7.9 6.3 5.3 4.4 100 20 40 100 0.1 mA mA mArms mApk A2s V V Min 3 Typical 3. 3 Max 3.6 Units V A 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 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. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 3.3V Input / 1.2V – 2.5V Output / 8A POWER PRODUCTS BP06SRDB-08C Output Specifications Parameter Output Voltage Set Point 1 2.5V 1.8V 1.5V 1.2V Load Regulation 2.5V 1.8V 1.5V 1.2V Line Regulation Regulation Over Temperature 2.5V 1.8V 1.5V 1.2V Total Output Voltage Regulation 2.5V 1.8V 1.5V 1.2V Output Ripple and Noise 2 2.5V 1.8V 1.5V 1.2V Output Ripple and Noise 2 Output Current Range Output DC Current Limit Shor t Circuit Surge 2.5V 1.8V 1.5V 1.2V Turn on Time Overshoot at Turn On Output Capacitance All All All Cout 0 Ton All All All Iout Ioutlim Ioutsurge 0.06 0.07 0.09 0.15 10 0 0.12 0.14 0.18 0.22 20 3 3200 ms % µF 0 10.4 55 40 40 40 10 100 75 75 75 25 8 20 mVrms A A A 2s 45 40 35 32 mVp-p 10 8 5 4 25 20 15 12 mV All 7.0 7.0 6.0 6.0 2.0 15 15 15 15 5 mV mV Module Symbol Vout 2.45 1.764 1.47 1.176 2.5 1.8 1.5 1.2 2.55 1.836 1.53 1.224 mV Min Typical Max Units V 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 and 10µF aluminum cap on output. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 BP06SRDB-08C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 8A Output Specifications Parameter Transient Response 3 Module Symbol Min Typical Max Units ∆V 50% to 100% of Max Load Settling Time 2.5V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 110 Ts 50 110 Ts 50 150 100 150 100 mV µs mV µs ∆V 50% to 100% of Max Load Settling Time 1.8V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 90 Ts 50 90 Ts 50 125 100 125 100 mV µs mV µs ∆V 50% to 100% of Max Load Settling Time 1.5V ∆V 100% to 50% of Max Load Settling Time Transient Response 3 90 Ts 50 90 Ts 50 125 100 125 100 mV µs mV µs ∆V 50% to 100% of Max Load Settling Time 1.2V ∆V 100% to 50% of Max Load Settling Time Ts Ts 90 50 90 50 125 100 125 100 mV µs mV µs 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 with a 470µF Tantalum cap at output. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 / 1.2V – 2.5V Output / 8A POWER PRODUCTS BP06SRDB-08C General Specifications Parameter Efficiency1 2.5V 1.8V 1.5V 1.2V Switching Frequency Output Voltage Trim Range2 2.5V 1.8V 1.5V 1.2V Remote Sense Compensation 2.5V 1.8V 1.5V 1.2V Weight All 10.5 5 10 10 10 g 80 90 90 90 105 110 110 110 % All Fsw Module Symbol η 89 85 83 80 250 92 88 86 83 300 340 kHz % Min Typical Max Units % 1. Vin=3.3V, full load and Ta=25° C. 2. See graphs on pages 12-14. 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 0.8 4 Min Typical Max Units V V 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. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 BP06SRDB-08C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 8A Efficiency Data Module 2.5V 96% 95% 94% Module 1.8V 93% 92% 91% 90% 89% 88% 87% 86% 85% 84% 83% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Output Current Efficiency Efficiency 93% 92% 91% 90% 89% 88% 87% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Output Current 3.0V 3.3V 3.6V 3.0V 3.3V 3.6V Module 1.5V 92% 91% 90% 89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 O utput Current Module 1.2V 90% 89% 88% 87% 86% 85% 84% 83% 82% 81% 80% 79% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Output Current Efficiency Efficiency 3.0V 3.3V 3.6V 3.0V 3.3V 3.6V ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 3.3V Input / 1.2V – 2.5V Output / 8A POWER PRODUCTS BP06SRDB-08C Ripple and Noise 1µF ceramic cap and 10µF aluminum electrolytic cap are added at the output. Ripple and noise at full load and 3.3Vdc input, 2.5Vdc output and Ta=25° C Ripple and noise at full load and 3.3Vdc input, 1.8Vdc output and Ta=25° C Ripple and noise at full load and 3.3Vdc input, 1.5Vdc output and Ta=25° C Ripple and noise at full load and 3.3Vdc input, 1.2Vdc output and Ta=25° C ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 BP06SRDB-08C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 8A Transient Response Transient response: di/dt = 0.5A/µS, external load capacitance Co=470µF (Tantalum capacitor) Vout=2.5V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=2.5V 100% to 50% load transients at 3.3V input and Ta=25° C Vout=1.8V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=1.8V 100% to 50% load transients at 3.3V input and Ta=25° C ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 3.3V Input / 1.2V – 2.5V Output / 8A POWER PRODUCTS BP06SRDB-08C Transient Response Transient response: di/dt = 0.5A/µS, external load capacitance Co=470µF (Tantalum capacitor) Vout=1.5V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=1.5V 100% to 50% load transients at 3.3V input and Ta=25° C Vout=1.2V 50% to 100% load transients at 3.3V input and Ta=25° C Vout=1.2V 100% to 50% load transients at 3.3V input and Ta=25° C ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 BP06SRDB-08C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 8A Thermal Considerations Derating Curve 8 100LFM 200LFM 300LFM Output Current (A) 6 4 Natural Convection 2 0 0 10 20 30 40 50 60 70 85 Ambient Temperature, Ta (˚C) Output Current vs. Local Ambient Temperature and Air Velocity Output Voltage Set-Point Adjustment Trim Down Test Circuit Vo Trim Up Test Circuit Vo Trim Trim Gnd Gnd ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 3.3V Input / 1.2V – 2.5V Output / 8A Output Voltage Set-Point Adjustment 300 T rim resistor value Rtrim_dow n(Kohm) 270 240 210 180 150 120 90 60 30 0 1.9 1.96 2.02 POWER PRODUCTS BP06SRDB-08C SRDB-08C250 Trim Resistor Calculation Rtrim down = ( 9.590 – 14.29) Kohm Vo – Vo, adj 2.08 2.14 2.2 2.26 2.32 2.38 A djusted outp ut voltage Vo,adj (V) 2.44 2.5 300 Rtrim up = ( 4.504 – 8.66) Kohm Vo, adj – Vo T rim resistor value,Rtrim_up(Kohm) 270 240 210 180 150 120 90 60 30 0 2.5 2.52 2.53 2.54 2.56 2.58 2.59 2.61 Adjusted output voltage Vo,adj(V) 2.62 2.63 2.65 300 T rim resistor value Rtrim_dow n(Kohm) 270 240 210 180 150 120 90 60 30 0 1.5 1.53 1.56 1.59 1.62 1.65 1.68 1.71 1.74 A djust ed outp ut voltage Vo,adj (V) 1.77 1.8 SRDB-08C180 Trim Resistor Calculation Rtrim down = ( 3.869 – 12.5) Kohm Vo – Vo, adj 300 T rim resistor value,Rtrim_up(Kohm) 270 240 210 180 150 120 90 60 30 0 1.8 1.83 1.86 1.89 1.92 1.95 1.98 2.01 Adjusted output voltage Vo,adj(V) 2.04 2.07 2.1 Rtrim up = ( 3.072 – 8.66) Kohm Vo, adj – Vo ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 BP06SRDB-08C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 1.2V – 2.5V Output / 8A Output Voltage Set-Point Adjustment 300 T rim resistor value Rtrim_down(Kohm) 270 240 210 180 150 120 90 60 30 0 1.25 1.27 1.3 1.33 1.35 1.38 1.4 1.43 1.45 Adjust ed outp ut voltage Vo,adj (V) 1.48 1.5 SRDB-08C150 Trim Resistor Calculation Rtrim down = ( 2.712 – 12.5) Kohm Vo – Vo, adj 300 T rim resistor value,Rtrim_up (Kohm) 270 240 210 180 150 120 90 60 30 0 1.5 300 270 T rim resistor value Rtrim_down(Kohm) 240 210 180 150 120 90 60 30 0 1 1.02 1.04 1.06 1.08 1.1 1.12 1.14 Adjusted output voltage Vo,adj (V) 1.16 1.18 1.2 Rtrim up = ( 3.072 – 8.66) Kohm Vo, adj – Vo 1.54 1.58 1.62 1.66 1.7 1.74 1.78 Adjusted output voltage Vo,adj(V) 1.82 1.86 1.9 SRDB-08C120 Trim Resistor Calculation Rtrim down = ( 1.562 – 8.48) Kohm Vo – Vo, adj 300 270 T rim resistor value,Rtrim_up (Kohm) 240 210 180 150 120 90 60 30 0 1.2 1.22 1.24 1.26 1.28 1.3 1.32 1.34 Adjusted output voltage Vo,adj(V) 1.36 1.38 1.4 Rtrim up = ( 3.072 – 4.64) Kohm Vo, adj – Vo ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 3.3V Input / 1.2V – 2.5V Output / 8A POWER PRODUCTS BP06SRDB-08C Mechanical 0.827 [21.00] 0.102 [2.60] 0.669 [17.00] 0.118 [3.00] 0.197 [5.00] Pin 1 2 3 4 5 6 7 8 9 10 11 12 Function Ground Ground Ground Ground +Vin +Vin Trim Remote On/Off Remote Sense (+) +Vo +Vo +Vo 0.079 [2.00] 0.345 [8.75] 1.22 [31.00] 12 11 10 9 8 7 123456 Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. 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. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 06.06 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 13