SBB501S Datasheet, PDF (1/11 Pages) International Rectifier – HIGH RELIABILITY CLASS K HYBRID RADIATION HARDENED, NON-ISOLATED

PD-97563B
HIGH RELIABILITY CLASS K HYBRID,
RADIATION HARDENED, NON-ISOLATED
POINT OF LOAD (POL) VOLTAGE REGULATOR
SBB SERIES
Single Output
Description
The SBB Series point of load (POL) DC to DC voltage
regulators are high reliability hermetically sealed thick
film hybrids designed to provide a single regulated DC
output from a DC voltage source. The output power
rating is 14W to 30W depending on output voltage,
with maximum current rating of 14A. The POLs are class
K qualified per MIL-PRF-38534. These products are
designed to operate continuously on board a space
craft up to the rated power output without power derating
for case temperature of 85°C. The POLs are suitable
for harsh radiation environments normally encountered
in the geo-synchronous orbit (GEO), medium earth orbit
(MEO), low earth orbit (LEO), deep space, and for other
challenging radiation design applications.
The SBB POL is a non isolated synchronous buck
regulator. It incorporates IR’s heritage- rich components
and circuit design library for long term reliability
expected of system designs with a mission life of up to
18 years or more. The SBB Series of POLs operate from
a DC input power source with the voltage range of 4.5V
to 5.5V. It converts DC input voltage down to a fixed and
highly stable DC output. The standard voltage outputs
are 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The output
is adjustable with the addition of an external resistor.
The output adjustment range is approximately ±10% of
a nominal output voltage. Also included is remote
sensing capability to compensate for voltage drops in
the output lines. This feature, in combination with the
output adjustment capability, enables an output voltage
of a POL to be accurately set as needed.
With its excellent efficiency performance, SBB POLs
are ideal as the point of load regulators for the
distributed power architecture (DPA) design systems.
Other key benefits include excellent dynamic load
response, precise voltage setting, remote output voltage
sensing and synchronization.
Features
n Total dose >100K Rads (Si)
n SEE hardness rated with LET > 82 MeV-cm² /mg
n Operates from 4.5V to 5.5V DC supply
n Fixed output voltage: 1V, 1.2V, 1.5V, 1.8V,
2.5V and 3.3V are standards
n Output power up to 30W or 14A maximum
without de-rating
n High efficiency to 89%
n Remote sense compensation
n Fixed 400 KHz operating frequency
n Output adjustable to ±10% of nominal
output with an external resistor
n Enable function pin for remote on/off control
n Input undervoltage and output under
voltage protection
n Overload and short circuit protection
n Low noise with integrated input
and output filters
n No external filter capacitors required
n Soft start
n Under voltage lockout (UVLO)
n Synchronization
n Output Status Telemetry(POK)
n -55 to +85°C operating case temperature
without output power derating
n MIL-PRF-38534 element evaluated components
n Custom versions available
n Derating per MIL-STD-1547 for space flight
n MTBF > 2.8 million hours for space
flight environments
n Standard Microcircuit Drawings (SMDs) Available
www.irf.com
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11/28/12