sat8564 electronics electronics point-of-load switching regulator 4.5vdc - 12vdc input, 1.21v dc - 5.0vdc output, 5.5a (preliminary) features preliminary ? input range 4.5v to 12v ? rad-tolerant to 100krad (tid) 1 ? adjustable or fixed output voltage ? up to 5.5a output current ? fully integrated assembly includes inductor ? remote-sense operation ? under-voltage lockout ? internal soft start ? current limiting ? efficiencies up to 85% ? 120w/in 3 power density description the sat8564 is a non-isolated powerpac module for high re liability and full military distributed power, point of load applications. fully integrated, the sat8564 includes buck controller, inductor, and input/output capacitors integrated in a single p ackage. the sat8564 operates from an input voltage of +4.5v to +12v providing step down power conversion to output voltages as low as 1.21v. operating features include output voltage adjust, output current limit, shutdown, external synchronization, soft start and under voltage lockout. the sat8564 can also be set up in a parallel configuration to increase output current capability. careful design and layout ensure excel lent stability, transient response, a nd low noise operation. packaged in a compact 16-lead flat-pack the sat8564 is manufactured in a facility certified to mil-prf-38534, class h & k 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 12 v io output current 6 a pd power dissipation tcase=25deg.c 20 w rthjc thermal resistance, junction to case 5.0 o c/w 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 sat8564 preliminary rev 8 www.satcon.com
satcon electronics 2 sat8564 preliminary rev 8 electrical characteristics @ ta=-55deg.c to +125deg.c (unless otherwise specified) table 2. pre-radiation symbol parameter test conditions value units min typ max vout output voltage accuracy vin=5.0v, iout=3.0a 2.0 % kvi line regulation +4.5v vin +6.0v, iout = 4a 0.1 % kvo load regulation vin = 5v, 1a iout 4a 2.0 % vin input voltage ran ge iout=2.5a 4.5 12 v fsync synchronizing range 580 1000 khz vsync sync input voltage, (note 4) 1.5 2.2 v isc short-circuit current limit vin=5.0v, 6.0 a ripple rejection f=120hz, iout=50ma 55 db ishdn shutdown source current vshdn=5.0v 75 ua vshdn shutdown input voltage (note 2,3) vin=5.0, v out < 0.5v 0.4 v table 3. post-radiation (projected) symbol parameter test conditions value units min typ max vout output voltage accuracy vin=5.0v, iout=3.0a 4.0 % kvi line regulation +4.5v vin +6.0v, iout = 4a 0.2 % kvo load regulation vin = 5v, 1a iout 4a 3.0 % isc short current limit vin=5.0v, over current latch up 6.0 a ishdn shutdown source current vshdn=5.0v 75 ua vshdn shutdown input voltage (note 2,3) vin=5.0, v out < 0.5v; 0.4 v notes: 1. at this time, satcon does not have a dscc approved radiation program 2. output inhibit guaranteed @ vshdn< 0.4v. 3. shutdown input should be pulle d up to vin when not used. 4. synch input should be grounded when not in use
typical performance characteristics efficiency vs. output current vin= +5v 70.00% 75.00% 80.00% 85.00% 90.00% 012345 output current (a) efficiency +2.5v +3.3v efficiency vs. current vin= +5v 0.00% 20.00% 40.00% 60.00% 80.00% 100.00% 0246 output current (a) efficiency +1.8v +1.5v output ripple vs. current vout= +3.3v 0 20 40 60 80 0123 output current (a) mv 4 satcon electronics 3 sat8564 preliminary rev 8 application circuits figure 3.- basic fixed regulator version
figure 4.- adjustable regulator version v out = v ref x (1+r adj /2490), with vref~1.21 volts table 4.- commonly available 1% resistor values 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 figure 5.- remote sense version satcon electronics 4 sat8564 preliminary rev 8
fig 6- parallel configuration schematic (see design note for sat8564 for further information) satcon electronics 5 sat8564 preliminary rev 8
package outline sat8564r/f/a pin # description 1-4 vin 5-9 gnd 10 shutdown 11 sync 12 adjust/ sense* 13-16 vout * no connection for fixed. adjust pin for adjustable configuration. sense pin for remote version. sat8564p pin # description 1-4 vin 5-9 gnd 10 vcomp 11 synch 12 feedback (fb) 13-16 vout ordering information: sat8564r k f -3.3 product number screening level package type output voltage r= remote sense version* k = class-k compliant f= 16 pin flat pak -0.8 = 0.8v fixed p= parallel version h= class h compliant - 1.3 = 1.3v fixed f= fixed version em= eng. model - 1.8 = 1.8v fixed a= adjustable version blank= 25deg c cots - 2.5 = 2.5v fixed - 3.3 = 3.3v fixed * only available as -adj - 5.0 = 5.0v fixed -adj = adjustable output satcon electronics 6 sat8564 preliminary rev 8
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