sat8565p/a point-of-load switching regulator electronics electronics 4.5vdc - 12vdc input, 3.5a output current features ? input range 4.5v to 12v ? adjustable output voltage ? parallel configuration available ? up to 3.5a output current ? integrated input capacitors ? variable frequency operation (note 1) ? remote-sense operation ? efficiencies up to 85% description the sat8565 is a non-isolated powerpac module designed for high reliability and fu ll military point of load applications. fully integrated, the sat8565 include s buck controller, inducto r, and input capacitors integrated in a single package. the sat8565 operates fr om an input voltage of +4.5v to +12v providing step down power conversion to any output voltage from 1.21v to 5.0v. operating features include output voltage adjust, output current limit, shutdown, external synchronization and soft start. careful design and layout ensure excellent stability, transient response, and low noise operation. packaged in a compact 5 pin mo-078 package, the sat8565 is manufactured in a facility certified to mil-prf-38534 and operates over the full ?55 o c to +125 o c temperature range. absolute maximum ratings (exceeding maximum ratings may damage the device) table.1 symbol parameter value unit vin dc input voltage vin-vground 15.0 v io output current 4.0 a pd power dissipation tcase=25deg.c 25 w rthjc thermal resistance, junction to case 2.5 o c/w vshdn shutdown pin voltage 7.0 v vsync sync pin voltage 7.0 v tstg storage temperature -65 to +150 o c tj operating temperature range -55 to +125 o c tsold maximum soldering temperature, 10sec 300 o c satcon electronics 1 sat8565 web rev 11, 4/17/2007 www.satconelectronics.com
satcon electronics 2 sat8565 web rev 11 electrical characteristics @ ta=-55deg.c to +125deg.c (unless otherwise specified) table 1. symbol parameter test conditions value units min typ max vout output voltage accuracy vin=5.0v , iout=2.0a, vo= vref 1.0 2.0 % kvi line regulation +4.5v vin +6.0v, iout = 3a .1 % kvo load regulation vin = 5v, 1a iout 3a 1.0 % vin input voltage ran ge iout=2.5a 4.5 12 v vsync sync input voltage 1.5 2.2 v isc short-circuit current limit vin=5.0v, 6.0 a ishdn shutdown source current vin=6.0v; vshdn=0, vsw=0 75 ua fsync synchronizing range 1 580 1000 khz vshdn shutdown input voltage 2,3 vin=5.0, vout < 0.5v 0.4 v notes: 1. frequency of operation can be adjusted when using the sync input, (table 1) . this input should be grounded when not in use. 2. output inhibit guaranteed @ vshdn< 0.4v. 3. shutdown pin should be pulled up to vin (rpullup 5k ? ), when not in use.
typical performance characteristics efficiency vout= +2.5v 74 .0 0 % 76 .0 0 % 78 .0 0 % 80.00% 82.00% 84.00% 0123 4 amps output ripple vs. current vout= +2.5v 0 20 40 60 80 0 1234 output current (a) figure 1, efficiency figure 2, output ripple application circuits figure 4.- adjustable regulator version vout = vref x (1+radj/2490), with vref~1.21 volts table 3.- commonly availabl e 1% resistor values fo r various output voltages v out (v) r adj ( ?) v out (v) r adj ( ?) 1.21 0 2.8 3240 1.5 590 3.0 3650 1.8 1210 3.3 4320 2.0 1620 3.5 4750 2.2 2050 3.8 5360 2.5 2670 4.0 5760 satcon electronics 3 sat8565 web rev 11
figure 3.- parallel operation (see sat8565 design note for further information) * ~1.5nf times the number of paralleled units if us ing electrolytic output capaci tors, 22nf times if using ceramic output capacitors. satcon electronics 4 sat8565 web rev 11
package outlines 12345 12345 satcon electronics 5 sat8565 web rev 11 pin no pin name pin description 1 vin input voltage 2 gnd ground 3 vout output voltage 4 shdn shutdown pin. output reset occurs when vshdn< 0.4v 5 adjust adjust pin for adjustable output (sat8565a) ; case isolated- no connection pin no pin name pin description 1 vin input voltage 2 fb feedback pin (adjust) 3 vout output voltage 4 sync sync pin. 5 vc compensation pin case ground 12345 right angle lead-bend ** pin assignments for sat8565p, (parallel configuration). pin assi g nments for sat8565a, (ad j ustable configuration). surface mount lead-bend ** standard thru-hole package
ordering information: ** lead-bend and surface-mount configurations may be requested as a separate line item on your sat8565 a -3 h t -adj product number current designation screening level package type output voltage p= parallel version - 3 = 3a version k= class k comliant (mil- prf-38534) t = mo-078 -adj = adjustable version a= adjustable version h = class-h compliant (mil- prf-38534) blank = satcon commercial screening em = eng. model order. electronics electronics 165 cedar hill st., marlb sachusetts 01752, usa orough, mas tel: 508-485-6350 fax: 508-485-5168 e-mail: electronics. sales@satcon.com for more information about satcon po wer products, visit us at: www.satconelectronics.com specifications in this document are s ubject to change without notice. satcon electronics 6 sat8565 web rev 11
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