DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A Features ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ High output 15A 3.3V ±5%, 5/12V ±10% Input Regulation ±0.4% line and load Industry standard pin configuration High efficiency to 91% Remote Sense, Trim and Enable Short Circuit protection MTBF 2.9 million hours Output voltage trimmable down to 0.6V using the optional voltage reference Can source and sink output current This unit is not fuse protected. User is responsible for providing system protection. Consult factory for application information. Specifications * S151-03 S151-05 S151-12 3.3V ± 10% 5.0V ± 10% Minimum 680µF 12V ± 10% Input Specifications Input voltage range External input capacitor Measured at +Vin pin See also note on pg 9 and charts on pg 7 Output Specifications Standard output voltages Output current Load regulation Line regulation External output capacitor Short circuit protection 0.8V 0.9V 1.2V 1.5V 1.8V 2.5V 1.0V 1.2V 1.5V 1.8V 2.5V 3.3V 15A 15A 1.5V 1.8V 2.5V 3.3V 5.0V 15A** ±0.5% ±0.5% >150µF with maxESR = 100mΩ 18A (at 70°C) to 32A (at -40°C) Outputs 0.8V and 1.0V trimmable down to 0.6V using the on-board voltage reference (option 7 or F, see pg 2 and trimming equations on pg 8). Standard setpoint accuracy varies from ±1.5% at the low end of the output voltage range, to ±3% at the high end. (see chart on pg 2) Contact factory for tighter tolerances. See note on pg 8 for trimming to different voltages. 200 LFM at 70°C (see also derating curves page 5-6) 0 to 15A load Over specified input voltage range See also note on pg 9 General Specifications Enable *** Efficiency Isolation Switching frequency Approvals and Standards Protection Operating Temperature **** Storage Temperature Weight MTBF ON-open or low / OFF-high (max 15V) 90% typical Non-isolated 300kHz UL 94V-0 Fusing -40°C to 70°C -40°C to 85°C 0.4 oz (11.3 gm) 2.7 million hours See efficiency curves on pg 4 Fixed Unit is not fused. 200 LFM at 70°C (see also derating curves) Non-condensing Per RAC PRISM at 50°C ambient and 200 LFM * All specifications are typical at nominal input, full load at 25°C unless otherwise stated. ** Max 10A for 5.0V output. *** Pull below 0.4V and sink greater than 50 µA or leave open to enable the SIP; pull above 2V (do not exceed 15V) and source greater than 150 µA to disable the SIP. **** The output capacitors must meet the max ESR = 100 mΩ requirement over the operating temperature range. 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 1 of 10 DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A Part Number Designations S151 - 0 5 2 0 X Y Z - B B Pin Length B = .145 inch (Standard) Consult Factory for Other Options Model Number Input Voltage 03 = 3.3V 05 = 5V 12 = 12V Feature Options* B = Remote Sense, Trim and Enable (Standard) Consult Factory for Other Options Mechanical Options 2 = Vertical Top Side Pins (Standard) Consult Factory for Other Options Output Voltage XYZ = X.YZ Volts Set Point Tolerance 0 = Factory Standard (See Initial Setpoint Tolerances) Initial Setpoint Tolerances Initial Setpoint Tolerance for 3.3V and 12V input SIPs Initial Setpoint Tolerance for 5V input SIPs Pin Assignments* CONNECTOR J1 PIN FUNCTION CONNECTOR PIN FUNCTION 1 VOUT 1 Ground 2 VOUT 2 VIN 3* Remote Sense (Empty Optional) 3 VIN 4 VOUT 4* Empty (Reference Voltage Optional) 5 Ground 5 Trim 6 Enable J2 * Pin is present only when feature is selected. 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 2 of 10 DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A Outline Drawings 2.77 (70.4) MAX .050 (1.27) 2.650 (67.35) .540(15.7) .62 (13.72) MAX MAX 1 2 3 4 5 1 2 3 Topside J1 J2 4 5 6 .155Length Pin MIN Option ± .02 (± .5) NOTE 3 .025 X .025 (0.64 X 0.64) .100 (2.54) 1.800TYP (45.72) 1.400 (35.56) .40 (10.2) Mechanical Options 2 .435 MAX .255 MAX .110 MAX .03 .03 Mech Option #2 (Standard) 1. Dimensions are in inches and (millimeters). 2. Tolerances: (unless otherwise noted) Inches .XX ± .020 .XXX ± .010 Pin: ± .002 Millimeters .X ± 0.5 .XX ± 0.25 ± 0.05 3. Pin is present only if feature is selected. * Recommended Customer Hole Size 0.046 ±.003 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 3 of 10 DC/DC Converter DC/DC Converter Efficiency Curves at 25°C 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 4 of 10 DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A Derating Curves No derating needed at 70°C with 200 LFM airflow or higher. * * Extended operation at greater than rated current may degrade reliability. 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 5 of 10 DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 6 of 10 DC/DC Converter DC/DC Converter Input Ripple Current Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A Approximate ripple current ratings required for input bulk capacitor 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 7 of 10 DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A Resistor Trim Equations NOTE: • F o r b e s t r e s u lts , th e tr im m in g ra n g e s h o u ld n o t e x c e e d + /- 2 0 % o f th e in itia l o u tp u t v o lta g e s e t b y th e fa c to r y ( V s e t) . T o tr im d o w n to 0 .6 V , u n its w ith a n in itia l o u tp u t v o lta g e o f u p to 1 .2 V c a n b e u s e d (a p p lie s to 3 .3 V a n d 5 V in p u t u n its o n ly ). T r im m in g U P — r a is in g th e o u tp u t v o lta g e u s in g a r e s is to r fro m T rim to G ro u n d . 3 .3 V in a n d 1 2 V in Rtrim = 1992 (Vout − Vset Rtrim = − 500 × ) V o u t m a x = 2 .5 V • 5 V in (1 + Vset − Vout ) (Vset − Vout ) V o u t m a x = V s e t + 1 a s R tr im a p p ro a c h e s 0 Ω . T r im m in g D O W N — lo w e r in g th e o u tp u t v o lta g e u s in g a re s is to r fro m T rim to a n e x te r n a l v o lta g e re fe r e n c e o r to th e V o u t p in s . 3 .3 V in a n d 1 2 V in Rtrim = 498 × ( 4 − 5 × Vref ) (Vout − Vset ) V o u t m in = 0 .5 V 5 V in Rtrim = − 500 × (− 1 − Vset + Vout + Vref ) (− Vset + Vout ) V o u t m in = V s e t – ( V re f – 1 ) a s R tr im a p p ro a c h e s 0 Ω . W h e re : V o u t is th e d e s ir e d o u tp u t v o lta g e . V s e t is th e o u tp u t v o lta g e s e tp o in t ( o u tp u t v o lta g e w ith o u t tr im ) . V re f is th e r e fe re n c e v o lta g e fo r th e trim re s is to r w h e n tr im m in g d o w n . If u s in g V o u t fo r th is p u rp o s e , th e n V r e f = V o u t. R tr im is th e r e s is ta n c e v a lu e o f th e trim r e s is to r ( o h m s ) . • T r im m in g D O W N th e S 1 5 1 b y u s in g th e o n -b o a r d v o lta g e re fe re n c e . C o n n e c t a trim r e s is to r fr o m T r im to th e R e fe r e n c e V o lta g e p in . 3 .3 V in Rtrim = 750 (Vset − Vout 5 V in ) − 832 Rtrim = 4233 (Vset − Vout ) − 1000 W h e re : V o u t is th e d e s ir e d o u tp u t v o lta g e . V s e t is th e o u tp u t v o lta g e s e tp o in t ( o u tp u t v o lta g e w ith o u t trim ). R tr im is th e r e s is ta n c e v a lu e o f th e tr im r e s is to r (o h m s ). 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 8 of 10 DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A External Capacitance for SIP Products All SIP products require external capacitance to be placed on the system board that the SIP will be designed into. This application note is an attem pt to explain how to translate datasheet inform ation and apply it to a system level board design. Input Capacitance Although input capacitance value is not critical, the input capacitors m ust be capable of storing fairly large am ounts of energy. This m eans, for exam ple, sm all ceram ic capacitors would be inappropriate. The prim ary criteria, though, for choosing the input capacitors is AC ripple current rating. The SIP datasheet contains a chart showing ripple current vs. output current (or output power). The system designer determ ines the m axim um SIP output current required from the SIP. Based on that num ber, the chart will show a corresponding ripple current rating the designer needs to plan for when choosing input capacitors. Exam ple using SIP S151-05 for 1.5 V output: The designer knows the S151 output current will be m axim um 12.5A in his application. The ripple current chart (5V input) shows a 7A rating required for the input capacitor. Also known is that the capacitor the designer hopes to use has a ripple current rating of 3A. Therefore, the designer m ust use three of the chosen capacitors in parallel for a total ripple current capability of 9A. This will adequately cover the 7A need. Output Capacitance The only requirem ent for capacitance value is for basic circuit stability of the SIP. That value is specified on the SIP datasheet— usually 150µF. The other consideration for the output capacitor is the total ESR (Equivalent Series Resistance). As with ripple current, every capacitor has a specified ESR. W hen using m ultiple capacitors in parallel, this ESR is added exactly like parallel resistors. Therefore, m ore capacitors m ean less ESR. The SIP datasheet specifies a m axim um total ESR necessary for optim um SIP perform ance. The designer m ay also choose to add m ore capacitance to reduce output ripple and noise. Exam ple: The datasheet specifies a m axim um ESR of 100m Ω for output capacitance. The system designer wants to use a capacitor with a specified ESR of 130m Ω. Since 130m Ω is m ore than the needed 100m Ω, two capacitors m ust be used in parallel for a total effective ESR of 65m Ω. Generally, good, low ESR bulk capacitors are recom m ended for both input and output capacitance so that fewer capacitors are needed since board real estate is usually an im portant factor in today's designs. 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 9 of 10 DC/DC Converter DC/DC Converter Programmable, Single Output, 1.1V - 1.85Vout @ 60A 3.3V input, 0.8 to 2.5V output, 15A 5V input, 1.0 to 3.3V output, 15A 12.0V input, 1.5 to 5.0V output, 15A Impact on Output Voltage Ripple and Transient Response If the custom er’s application req uires a very low output voltage ripple and / or very low output voltage overshoot / undershoot during transients, then the guidelines previously show n need to be exceeded and good layout practices becom e m andatory. B y using four 330µ F O SC O N capacitors, each having E S R = 17m Ω , the output voltage ripple can be decreased to 50m V pk-pk on a 1.2V output S IP . A lso during a transient load condition (load current steps from 20% to 100% and back, at 2 A / µ sec) the output voltage does not overshoot / undershoot m ore than 100m V . W hen fast and deep transient loads are expected, the input capacitor becom es im portant as w ell, especially if the SIP is far from its input voltage source. C apacitors having as m uch as 2000µ F and com bined ES R lower than 20m Ω m ig ht be needed. P ractical results heavily depend on physical layout and specific load conditions. For critical applications the custom er is encouraged to consult with the m anufacturer. C&D Technologies, Inc. reserves the right to alter or improve the specification, internal design or manufacturing process at any time, without notice. Please check with your supplier or visit our website to ensure that you have the current and complete specification for your product before use. © C&D Technologies, Inc. 2004 No part of this publication may be copied, transmitted, or stored in a retrieval system or reproduced in any way including, but not limited to, photography, photocopy, magnetic or other recording means, without prior written permission from C&D Technologies, Inc. Instructions for use are available from: www.cdtechno-cps.com 1150 Eglinton Avenue East Toronto, Ontario M3C 1H7 1-866-740-1232 S151_084-S151-00_RevH_Jan18-2005.fm www.cdtechno-cps.com 4607 S.E. International Way Milwaukie, Oregon 97222 1-971-206-2800 10 of 10