datel, inc., mansfield, ma 02048 (usa) tel: (508)339-3000, (800)233-2765 fax: (508)339-6356 email: sales@datel.com internet: www.datel.com single output uns series features figure 1. simplified schematic +v in +v out pwm controller reference & error amp on/off control trim +v in ?v in ?v in +v out output return output return non-isolated, 3.3v and 5v 3 amp, dc/dc converters low cost, high efficiency, wide input voltage range and low output noise define datel?s new uns series of non-isolated, step-down, switching dc/dc converters. the 3.3v- and 5v-output devices are, respectively, 90% and 92% efficient. all models are fully line and load regulated and maintain specified accuracy over the impressively wide input voltage ranges of 4.75 to 13.6 volts for 3.3v outputs and 6 to 16.5 volts for 5v outputs. output ripple and noise are typically 50mvp-p. uns devices are fabricated using proven smt-on-pcb construction techniques. the 3.3v and 5v devices are both available in either lightweight sip (2" x 0.4" x 0.8") or dip (2" x 0.8" x 0.4", 600 mil spacing between rows) package configura- tions. the dip option is designated by a "d" suffix added to the part number. all models are conformally coated for protection against moisture and dust. the high efficiency of the uns series? fixed-frequency (190khz) switching design eliminates the need for thermally conductive potting compound. devices are specified for full-power operation up to ambient temperatures of +50c. with derating, they operate up to +70c. calculated mtbf (mil-hdbk-217f) is more than 1.6 million hours. these simple-to-use power converters have no minimum load requirements. they draw 1ma when unloaded and a mere 100a in the standby mode (on/off control turned off). 3.3v models have an output voltage adjustment range of 2.7 to 3.3 volts. 5v models are adjustable down to 3.0v. innovation and ex c ell e n c e ? ? n n n n n n n n n n n low cost sip or dip packaging 3.3v (10w) or 5v (15w) outputs wide range inputs: 4.75-13.6v for 3.3v models 6-16.5v for 5v models high efficiencies, typically 90-92% low output noise, 50mvp-p remote on/off control 100a "standby" input current output current limiting emc compliant highly reliable, 100% smt construction conformally coated for harsh environments
uns series non-isolated, 10 and 15w, single output dc/dc converters 2 case b1 (sip) part number structure mechanical specifications 0.900 (22.86) 1.97 (50.00) 0.400 (10.16) 0.81 (20.50) 0.03 (0.8) 0.1 (2.5 ) 0.28 (7.0) 0.07 (1.85) 12345 678910 4 eq. sp. @ 0.100 (2.54) 0.400 (10.16) 4 eq. sp. @ 0.100 (2.54) 0.13 (3.41) 0.30 (7.62) 0.025 (0.64) case b2 (dip) 0.900 (22.86) 1.97 (50.00) 0.400 (10.16) 0.81 (20.50) 0.03 (0.8) 0.14 (3.5) 0.28 (7.0) 12345 678910 4 eq. sp. @ 0.100 (2.54) 0.400 (10.16) 4 eq. sp. @ 0.100 (2.54) 0.13 (3.41) 0.40 (10.16) 0.025 (0.64) 0.60 (15.24) 0.10 (2.63) ** * no connection. for mechanical stability only. standoff input voltage range: d5 = 4.75-13.6 volts (7.5v nominal) d12 = 6-16.5 volts (12v nominal) nominal output voltage: 3.3 or 5 volts maximum output current in amps non-isolated sip packaging output configuration: u = unipolar add "d" suffix for optional dip package configuration 3.3 u ns 3 d5 d - / - i/o connections pin 6 7 8 9 10 function p18 trim output rtn. output rtn. +output +output function p18 +input +input ? input ? input on/off control pin 1 2 3 4 5 temperature derating output power (watts) ambient temperature (c) 20 18 16 14 12 10 8 6 4 2 0 ? 10 0 10 20 30 40 50 60 70 80 90 10 0 uns-3.3/3-d5 uns-5/3-d12 note: derating curves apply to both sip and dip package configurations performance specifications and ordering guide ? i out (amps) r/n (mvp-p) a load v out (volts) package (case, pinout) efficiency regulation (max.) ? line v in nom. (volts) range (volts) model i in ? (ma) max. typ. typ. min. output input uns-3.3/3-d5 3.3 3 50 100 1.0% 3.0% 7.5 4.75-13.6 1/1400 -- 90% b1, p18 uns-3.3/3-d5d 3.3 3 50 100 1.0% 3.0% 7.5 4.75-13.6 1/1400 -- 90% b2, p18 uns-5/3-d12 5 3 50 100 1.0% 3.0% 12 6-16.5 1/1330 -- 92% b1, p18 uns-5/3-d12d 5 3 50 100 1.0% 3.0% 12 6-16.5 1/1330 -- 92% b2, p18 ? typical at t a = +25 c under nominal line voltage and full-load conditions, unless otherwise noted. ? "d" suffix indicates dip package. ? ripple/noise (r/n) measured over a 20mhz bandwidth with a 100f external input capacitor and a 220f external output capacitor. additional ouput capacitors will lower r/n. see technical notes. ? listed output regulation specifications describe the total change in output voltage as the input (line) voltage or output (load) current is varied over its full specified range. typically, line regulation is better than 0.5% and load regulation is better than 1.0%. load regulation applies for 0 to 100% load conditions. ? nominal line voltage, no-load/full-load conditions.
non-isolated, 10 and 15w, single output dc/dc converters uns series 3 technical notes input voltage: "d5" models 15 volts "d12" models 18 volts input reverse-polarity protection none. see technical notes. output overvoltage protection none output current current limited. devices can withstand an output short circuit for brief durations only. storage temperature ? 25 to +85 c lead temperature (soldering, 10 sec.) +300 c these are stress ratings. exposure of devices to any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the performance/functional specifications table is not implied. absolute maximum ratings input and output capacitors though uns series, non-isolated, dc/dc converters have on-board input and output capacitors (c in = 6.8f, c out = 6.8f), the majority of applica- tions will require the installation of additional external i/o capacitance. the total input capacitance functions as a true energy-storage element, and its optimal value will vary as a function of line voltage. the selected external input capacitor should have both low esr and low esl because, as the power converter ? s input fet switch cycles on and off, the input capacitance must have the ability to instantaneously supply pulses of relatively high current. rather than install a large, expensive, on-board capacitor that addresses all possible input-voltage and output-load conditions, datel has chosen to leave out the bulk of the input capacitance so that users may select a cost- effective component appropriate to their own application. we use a low-esr 100f external input capacitor during production testing and have found 330f to be a conservative value that works well in the majority of applica- tions. in addition to their on-board output capacitor, uns series devices require the installation of additional output capacitors to achieve rated ripple/noise specifications. external output capacitors should be low-esr tantalum or electrolytic types, and they should be located as close to the converters as possible. a minimum of 220f is required to achieve rated ripple/noise specs. increased capacitance will lower output noise. there are no limitations on output capacitance; however, we have found minimal noise improvements beyond 4700f. typical @ t a = +25 c under nominal line voltage and full-load conditions, unless noted. ? ? uns series devices require external input/output capacitors to achieve rated performance. listed specifications assume c in = 100f and c out = 220f. ? see technical notes. ? output ripple/noise can be reduced with external capacitors. see technical notes. ? uns series converters have no minimum-load requirements. ? current limiting initiates at approximately 5% above rated load. ? dip models have a standoff which makes their total above-board height 0.44 inches. input input voltage range: "d5" and "d5d" models 4.75-13.6 volts (7.5v nominal) "d12" and "d12d" models 6-16.5 volts (12v nominal) input current see ordering guide input filter type capacitive overvoltage protection none reverse-polarity protection none on/off control (pin 5) ? ttl high (or open) = on, low = off output v out accuracy 5%, maximum temperature coefficient 0.01% per c ripple/noise (20mhz bandwidth) ? see ordering guide line/load regulation ? see ordering guide efficiency see ordering guide current limiting ? auto-recovery dynamic characteristics transient response (50% load step) 200sec max. to 2% of final value switching frequency 190khz environmental operating temperature: without derating ? 10 to +50 c with derating to +70 c (see derating curve) storage temperature ? 25 to +85 c physical dimensions : sip models 2 x 0.41 x 0.8" (50 x 10.3 x 21mm) dip models ? 2 x 0.8 x 0.44" (50 x 21 x 11.3mm) shielding none case connection none pin material gold-plated phosphor bronze weight 0.35 ounces (10 grams)
uns series non-isolated, 10 and 15w, single output dc/dc converters output trimming 5v devices can be trimmed down to 3.0v, and 3.3v devices can be trimmed down to 2.7v using a single external trimpot or fixed resistor. the trimpot should be connected between +v out (pins 9 and 10) and trim (pin 6) as shown in the figure below. the trimpot can be used to determine the value of a single fixed resistor which can then be connected between pins 9 and 10 and 6. fixed resistors should be metal-film types with relatively low absolute tcr ? s to ensure stability. in order to maximize their efficiency, uns devices employ high-value resistors in their voltage feedback loop. consequently, the external trimpots must also be high-resistance devices (1-2 megohms). if the trimpots are accidentally turned to their 0 stops, it will not damage the converters; however, the output voltage will be pulled down to an unstable level. use care not to trim the output voltage below the levels indicated in the accompanying table. 100 98 96 94 92 90 88 86 84 efficiency (%) 3.3v output current (amps) v in = 13.6v v in = 7.5v v in = 4.75v 0 0.5 1.0 1.5 2.0 2.5 3. 0 100 98 96 94 92 90 88 86 84 efficiency (%) 5v output current (amps) v in = 16.5v v in = 12v v in = 6v 0 0.5 1.0 1.5 2.0 2.5 3.0 output return +output r loa d trim error amp 1.195v r1 r3 r2 r trim 6 7, 8 9, 10 figure 2. output voltage trimming product uns-3.3/3 uns-5/3 output voltage adjustment range 2.7 to 3.3v 3.0 to 5.0v r1 68.68k 124.7 k r2 38 k 39 k r3 10k 10k r trim 160k 100k table 1. output voltage trim values efficiency vs. output current and input voltage (model uns-5/3) typical performance curves efficiency vs. output current and input voltage (model uns-3.3/3) the on/off control pin for normal operation, pin 5 should be left open. this pin has an internal 250k pull-up resistor to +5v (or to +v in if +v in < 5v). for dynamic control of the converters ? on/off functionality, a ttl logic high (+2.4v minimum, +5v maximum or +v in maximum if +v in < 5v, 100a max.) applied to pin 5 enables the converter, and a quasi-ttl logic low (0 to +0.5v, 100a max.) disables the converter. control voltages should be referenced to pins 3 and 4 ( ? input). for best results, use a mechanical relay or open-collector logic. when the converter is turned off, its input "standby" current will be approxi- mately 100a. applying a voltage that is greater than v in to the on/off control pin, or applying any voltage to this pin when no input power is applied to the converter, may cause permanent damage to the converter. ds-0406 9/98 datel makes no representation that the use of its products in the circuits described herein, or the use of other technical info rmation contained herein, will not infringe upon existing or future patent rights. the descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. specifications are s ubject to change without notice. the datel logo is a registered datel, inc. trademark. datel (uk) ltd. tadley, england tel: (01256)-880444 datel s.a.r.l. montigny le bretonneux, france tel: 01-34-60-01-01 datel gmbh m nchen, germany tel: 89-544334-0 datel kk tokyo, japan tel: 3-3779-1031, osaka tel: 6-354-2025 datel, inc. 11 cabot boulevard, mansfield, ma 02048-1151 tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 internet: www.datel.com email: sales@datel.com data sheet fax back: (508) 261-2857 innovation and ex c ell e n c e ? ? iso-9001 registered
i n n o v a t i o n a n d e x c ell e n c e ? ? datel, inc., mansfield, ma, usa tel: (508)339-3000, (800)233-2765 fax: (508)339-6356 email: sales@datel.com data sheet fax back: (508)261-2857 visit us on the internet: www.datel.com 3 12 (6-16.5) 2 x 0.4 x 0.8 ? b1, p18 1.0% 3.0% 50 92% ? uns-5/3-d12 uns, 10/15w 12 (6-16.5) 2 x 0.8 x 0.4 ? b2, p18 1.0% 3.0% 50 92% ? uns-5/3-d12d uns, 10/15w 5 ? 12 (10.4-13.6) 2 x 1 x 0.48 c13, p21 0.25% 0.5% 60 87% unr-5/5-d12 unr, 25w listed specifications are typical at t a = +25c under nominal line voltage and full-load conditions, unless noted. see individual product data sheets for mechanical specifications and pinouts. ripple/noise is specified over a 20mhz bandwidth. a listed specifications for these products are preliminary. ? 10-pin sip package. ? 10-pin dip package. ? listed specification is a typical. ? output voltage is user adjustable from 3.3 to 6v. ? output voltage is user adjustable from 1.4 to 3.6v. industry-standard, 11-pin sip package. n on - i sola ted dc/dc c onver ter s election g uide n on - i sola ted dc/dc c onver ter s election g uide output input voltage, rippl e / current nominal (range) dimensions case, line load noise efficiency datel data sheet @ (amps, max.) (volts) (inches) pinout (max.) (max.) (mvp-p) (min.) model number www.datel.com package regulation 2.5v single output , non-isola ted 2.5v single output , non-isola ted rev. c 6/99 5v single output , non-isola ted 5v single output , non-isola ted 2 5 (4.75-5.5) 1 x 1 x 0.45 c7a, p9 0.25% 0.5% 30 83% unr-2.5/2-d5 unr, 5w 8 5 (4.75-5.5) 2 x 1 x 0.39 c5a, p9 0.1% 0.5% 40 86% unr-2.5/8-d5 unr, 20/25w 12 (10.4-13.6) 2 x 1 x 0.48 c5c, p9 0.1% 0.6% 40 85% unr-2.5/8-d12 unr, 20/25w 10 5 (4.75-5.5) 2 x 1 x 0.39 c5a, p9 0.1% 0.5% 40 85% unr-2.5/10-d5 unr, 20/25w 12 (10.4-13.6) 2 x 1 x 0.48 c5c, p9 0.1% 0.6% 40 83% unr-2.5/10-d12 unr, 20/25w 12 5 (4.75-5.5) 2 x 1 x 0.44 c5b, p9 0.1% 0.5% 40 84% unr-2.5/12-d5 unr, 30w 20 5 (4.5-5.5) 2 x 2 x 0.49 c21, p26 0.1% 1.0% 60 85% unr-2.5/20-d5 a contact datel 5 (4.75-5.5) 1 x 1 x 0.45 c7a, p9 0.4% 0.5% 30 86% unr-3.3/3-d5 unr, 10w 3 7.5 (4.75-13.6) 2 x 0.4 x 0.8 ? b1, p18 1.0% 3.0% 50 90% ? uns-3.3/3-d5 uns, 10/15w 7.5 (4.75-13.6) 2 x 0.8 x 0.4 ? b2, p18 1.0% 3.0% 50 90% ? uns-3.3/3-d5d uns, 10/15w 12 (10.4-13.6) 1 x 1 x 0.45 c7a, p9 0.25% 0.5% 100 87% unr-3.3/3-d12 unr, 10w 5 (4.75-5.5) 2 x 1 x 0.39 c5a, p9 0.1% 0.5% 40 88% unr-3.3/8-d5 unr, 26/33w 5 (4.75-5.5) 2 x 1 x 0.39 c16a, p23 0.1% 0.5% 40 88% unr-3.3/8-d5t a ? contact datel 8 5 (4.75-5.5) 2 x 0.4 x 0.53 b3, p27 0.1% 0.5% 40 88% usn-3.3/8-d5 a contact datel 12 (10.4-13.6) 2 x 1 x 0.48 c5c, p9 0.1% 0.6% 60 86% unr-3.3/8-d12 unr, 26/33w 12 (10.4-13.6) 2 x 1 x 0.48 c16c, p23 0.1% 0.6% 60 86% unr-3.3/8-d12t a ? contact datel 5 (4.75-5.5) 2 x 1 x 0.39 c5a, p9 0.1% 0.5% 40 86% unr-3.3/10-d5 unr, 26/33w 5 (4.75-5.5) 2 x 1 x 0.39 c16a, p23 0.1% 0.5% 40 86% unr-3.3/10-d5t a ? contact datel 10 5 (4.75-5.5) 2 x 0.4 x 0.53 b3, p27 0.1% 0.5% 40 86% usn-3.3/10-d5 a contact datel 12 (10.4-13.6) 2 x 1 x 0.48 c5c, p9 0.1% 0.6% 60 85% unr-3.3/10-d12 unr, 26/33w 12 (10.4-13.6) 2 x 1 x 0.48 c16c, p23 0.1% 0.6% 60 85% unr-3.3/10-d12t a ? contact datel 12 5 (4.75-5.5) 2 x 1 x 0.44 c5b, p9 0.1% 0.5% 40 87% unr-3.3/12-d5 unr, 40w 20 5 (4.5-5.5) 2 x 2 x 0.49 c21, p26 0.1% 1.0% 50 87% unr-3.3/20-d5 a contact datel 3.3v single output , non-isola ted 3.3v single output , non-isola ted
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