SBB501S Datasheet, PDF (3/11 Pages) International Rectifier – HIGH RELIABILITY CLASS K HYBRID RADIATION HARDENED, NON-ISOLATED

SBB SERIES
Single Output
Remote Sense: Output pins 4 and 5 must be connected
to +Sense pin 6 for proper operation. The +Sense pin
may be connected remotely to the output line at the
load to compensate for a voltage drop in the output line
for precise optimum output regulation. The maximum
voltage compensation in combination with the output
voltage adjustment (if required) is limited to 10% of the
nominal output voltage.To enhance the load regulation
performance Input Return (Pin 2) may be connected
externally to Output Return (Pin 3).
Enable: An Enable pin is provided to remotely turn
the POL on or off. It can also be used for output
sequenceing for multiple SBB POL regulators. The
nominal threshold relative to the input return (pin 2)
is 2.5V. If 3.9 volts or greater are applied to the
Inhibit pin (pin 3) then the POL will operate normally.
The pin may be left open for normal operation. A
voltage of 0.4V or less will cause the SBB POL to
shut down.
POK:The SBB POL also provides a power ok (POK)
output status signal at Pin 11. A logic high signal is
present when the POL’s output voltage is greater
than 95% of the nominal output voltage. A logic low
signal at Pin 11 indicates the POL’s output voltage
drops below the output voltage threshold of 95%
The SBB Series POLs use a proven conservative
design methodology with careful incorporation of
known radiation performance devices and established
reliability components. All components are fully
derated to MIL-STD-1547. Standard design analyses
include stress, thermal, failure modes and effects
(FMEA), reliability & worst case and are available
upon request.
Synchronization: An external synchronization port
is provided to allow the multiple SBB POLs to be
synchronized to an external frequency source to
minimize the noise interference coming from the
switching operation of the POLs. The synchronization
frequency ranges from 360 KHz to 440 KHz and the
synchronization signal port can be driven from 5V
logic.
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