standard application for stby* pin; open = output enabled; ground = output disabled. pin-out information pin function 1 vid0 2 vid1 3 vid2 4 vid3 5 stby* - stand-by 6 vid4 7v in 8v in 9v in pin function 10 v in 11 v in 12 remote sense gnd 13 gnd 14 gnd 15 gnd 16 gnd 17 gnd 18 gnd PT7707 the PT7707 is a new series of high-performance, 18 amp integrated switching regulators (isrs) housed in a 27-pin sip package. the 18a capa- bility allows easy integration of the latest high-speed, low-voltage ps and bus drivers into existing 5v systems. the PT7707 series has been de- signed to work in parallel with one or more of the pt7749 - 18a current boosters for increased i out in incre- ments of 18a. the output voltage of the PT7707 can be easily programmed from 1.3v to 3.5v with a 5 bit input compatible with intels pentium a ii processor. a differential remote sense is also pro- vided which automatically compensates for any voltage drop from the isr to the load. only 33 0f of output capacitance are required for proper operation. for assistance or to order, call (800) 531-5782 c in = required 1200f electrolytic c out = required 330f electrolytic l1 = optional 1h input choke pin function 19 gnd 20 v out 21 v out 22 v out 23 v out 24 v out 25 v out 26 remote sense v out 27 sync out specifications characteristics PT7707 series (t a = 25c unless noted) symbols conditions min typ max units output current i o t a = +60c, 200 lfm, pkg n 0.1 * 18 ** a t a = +25c, natural convection 0.1 * 15 ** a input voltage range v in 0.1a i o 15a 4.5 *** 5.5 v output voltage tolerance d v o v in = +5v, i o = 15a v o -0.03 v o +0.03 v 0c t a +65c line regulation reg line 4.5v v in 5.5v, i o = 15a 10 mv load regulation reg load v in = +5v, 0.1 i o 15a 10 mv v o ripple/noise v n v in = +5v, i o = 15a 50 mv transient response t tr i o step between 7.5a and 15a 100 sec with c out = 330f v os v o over/undershoot 200 mv efficiency h v in = +5v, i o = 10a v o = 3.3v 89 % v o = 2.9v 87 % v o = 2.5v 85 % v o = 1.8v 79 % v o = 1.5v 77 % switching frequency ? o 4.5v v in 5.5v 650 700 750 khz 0.1a i o 15a absolute maximum t a 0+85c operating temperature range recommended operating t a forced air flow = 200 lfm 0 +65**** c temperature range over v in and i o ranges storage temperature t s -40 +125 c mechanical shock per mil-std-883d, method 2002.3 1 msec, half sine, mounted to a fixture 500 gs mechanical vibration per mil-std-883d, method 2007.2, 10gs 20-2000 hz, soldered in a pc board weight vertical/horizontal 31/41 grams * isr-will operate down to no load with reduced specifications. please note that this product is not short-circuit protected. **the PT7707 series can be easily paralleled with one or more of the pt7749 current boosters to provide increased output curren t in increments of 18a. *** the minimum input voltage is 4.5v or v out +1.2v, whichever is greater. ****see soa curves. output capacitors: the PT7707 series requires a minimum ouput capacitance of 330f for proper operation. do not use oscon type capacitors. the max imum allow- able output capacitance is 15,000f. input filter: an input filter is optional for most applications. the input inductor must be sized to handle 18adc with a typical value of 1 h. the input capacitance must be rated for a minimum of 1.3arms of ripple current. for transient or dynamic load applications, additional capacitance may be required. revised 7/24/98 power trends, inc. 27715 diehl road, warrenville, il 60555 (800) 531-5782 fax: (630) 393-6902 http://www.powertrends.com pt7705 7 - 11 13 - 19 20 - 25 27 v in gnd 1h gnd v out c out + c in + 12 26 1 l1 sync out load remote sense (+) remote sense (-) vid1 vid2 vid3 vid4 programming pins 2 3 4 stby* 5 6 vid0 PT7707 18 amp big-hammer programmable integrated switching regulator series
programming information vid4=1 vid4=0 vid3 vid2 vid1 vid0 vout vout 1 1 1 1 2.0v 1.30v 1 1 1 0 2.1v 1.35v 1 1 0 1 2.2v 1.40v 1 1 0 0 2.3v 1.45v 1 0 1 1 2.4v 1.50v 1 0 1 0 2.5v 1.55v 1 0 0 1 2.6v 1.60v 1 0 0 0 2.7v 1.65v 0 1 1 1 2.8v 1.70v 0 1 1 0 2.9v 1.75v 0 1 0 1 3.0v 1.80v 0 1 0 0 3.1v 1.85v 0 0 1 1 3.2v 1.90v 0 0 1 0 3.3v 1.95v 0 0 0 1 3.4v 2.00v 0 0 0 0 3.5v 2.05v ? single-device: +5v input ? 5-bit programmable: 1.3v to 3.5v@18a ? high efficiency ? input voltage range: 4.5v to 5.5v ? differential remote sense ? 27-pin sip package ? parallelable with pt7749 18a current boosters features for assistance or to order, call (800) 531-5782 power trends, inc. 27715 diehl road, warrenville, il 60555 (800) 531-5782 fax: (630) 393-6902 http:/www.powertrends.com PT7707, v o = 3.3 vdc (see note 1) efficiency vs output current ripple vs output current power dissipation vs output current efficiency - % ripple-(mv) pd-(watts) iout-(amps) iout-(amps) iout-(amps) note 1: note 1: note 1: note 1: note 1: all data listed in the above graphs has been developed from actual products tested at 25c. this data is considered typical dat a for the isr. safe operating area curves (@v in =+5v) ambient temperature (c) output current (amps) airflow airflow ambient temperature (c) output current (amps) pkg suffix n note 2: note 2: note 2: note 2: note 2: soa curves represent operating conditions at which internal components are at or below manufacturers maximum rated operating t emperatures. recommended maximum operating temperature 0 10 20 30 40 50 60 0 3 6 9 121518 5.5v 5.0v 4.5v vin 40 50 60 70 80 90 100 0 3 6 9 12 15 18 4.5v 5.0v 5.5v vin 0 2 4 6 8 10 12 14 0 3 6 9 12 15 18 5.5v 5.0v 4.5v vin series ordering information PT7707 o o o o o = 1.3 to 3.5 volts (for dimensions and pc board layout, see package styles 800 and 810.) recommended maximum operating temperature PT7707, v o = 3.3 vdc (see note 1) pkg suffix a, c pt series suffix (pt1234 x ) case/pin configuration vertical through-hole n horizontal through-hole a horizontal surface mount c 20 30 40 50 60 70 80 90 024681012141618 nat conv 60lfm 100lfm 200lfm 20 30 40 50 60 70 80 90 024681012141618 nat conv 60lfm 100lfm 200lfm logic 0 = pin 12 potential (remote sense gnd) logic 1 = open circuit (no pull-up resistors) vid3 and vid4 may not be changed while the unit is operating. characteristic data PT7707
for assistance or to order, call (800) 531-5782 3 power trends, inc. 27715 diehl road, warrenville, il 60555 (800) 531-5782 fax: (630) 393-6902 http://www.powertrends.com application notes pt7705/7707 series more application notes pin-coded output voltage adjustment on the ?big hammer? series isrs the isrs related to power trends? pt7705 incorporate pin- coded voltage control to adjust the ouput voltage. the control pins are identified vid0 -?vid4 (pins 1, 2, 3, 4, & 6) respec- tively. when the control pins are left open-circuit, the isr output will regulate at its factory trimmed output voltage. each pin is internally connected to a precision resistor, which when grounded changes the output voltage by a set amount. by selec- tively grounding vid0 -vid4, the output voltage these isrs can be programmed in incremental steps over the specified output voltage range. in each case, the program code and output voltage range offered by these isrs are compatible with the voltage id specification defined by intel corporation for voltage regulator modules (vrms) used to power pentium? micropro- cessors. refer to figure 1 below for the connection schematic, and the respective device data sheet for the appropriate pro- gramming code information. notes: 1. the programming convention is as follows:- logic 0: connect to pin12 (remote sense ground). logic 1: open circuit/open drain (see notes 2, & 4) 2. do not connect pull-up resistors to the voltage program- ming pins. 3. to minimize output voltage error, always use pin 12 (re- mote sense ground) as the logic ?0? reference. while the regular ground (pins 13-19) can also be used for program- ming, doing so will degrade the load reglation of the product. figure 1 4. if active devices are used to ground the voltage control pins, low-level open drain mosfet devices should be used over bipolar transistors. the inherent v ce (sat) in bipolar devices introduces errors in the device?s internal divider network. discrete transistors such as the bss138, 2n7002, irlml2402, or the 74c906 hex open-drain buffer are examples of appropriate devices. active voltage programming : special precautions should be taken when making changes to the voltage control progam code while the unit is powered. it is highly recommended that the isr be either powered down or held in standby. changes made to the program code while v out is enabled induces high current transients through the device. this is the result of the electrolytic output capacitors being ei- ther charged or discharged to the new output voltage set-point. the transient current can be minimized by making only incre- mental changes to the binary code, i.e. one lsb at a time. a minimum of 100s settling time between each program state is also recommended. making non-incremental changes to vid3 and vid4 with the output enabled is discouraged. if they are changed, the transients induced can overstress the device result- ing in a permanent drop in efficiency. if the use of active devices prevents the program code being asserted prior to power-up, pull pin 5 (stby) to the device gnd during the period that the input voltage is applied to v in . releasing pin 5 will then allow the device output to execute a soft-start power-up to the pro- grammed voltage. cout + cin + 1 m h (optional) +5v com stby l o a d pt7705 6 4 3 2 1 26 20-25 12 5 13-19 27 7-11 vo vin gnd sns(+) sns(-) synch out stby vid4 - vid0
packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) PT7707c nrnd sip mod ule ehc 27 8 tbd call ti level-1-215c-unlim (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. -- the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis. package option addendum www.ti.com 28-aug-2008 addendum-page 1
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