SBB Series
The SBB series POLs are hermetically sealed, thick film based microelectronic hybrids. The SBB series uses the assembly design and manufacturing processes with which IR has successfully served the world’s space community for almost 20 years. IR’s SBB series is the first space qualified, standard off-the-shelf point of load (POL) voltage regulator in the industry. The SBB POLs are class K screened per MIL-PRF-38534. The product design drivers are efficiency, compact form factor, ease of system integration, and space flight worthiness. It offers excellent efficiency and performance capable of meeting the power demand of today’s digital loads. An SBB is a self-contained POL, ready for system integration as external filtering is not required for most typical applications but the load may require decoupling capacitors depending on actual physical implementation. All internal components have been carefully evaluated and characterized to insure reliable operation under the intended operating environments. Design analyses including electrical stress, thermal, failure modes and effects (FMEA), reliability (MTBF), and worst case analysis (WCA) including end-of-life (EOL) performance, are standards and available upon request. Following are the key features of the SBB POL.

Applications: Digital payloads in geostationary or low earth orbit satellite, launch vehicles, and communication systems, 18 years life in orbit

Key Features:

• Total dose >100K Rads (Si)
• SEE hardness rated, SEL/SEB/SET with LET >82 MeV-cm2/mg
• Operates from 4.5V to 5.5V DC supply
• Fixed output voltage: 1V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V are standards
• Output power up to 30W or 14A maximum without power de-rating
• High efficiency to 89%
• -55 to +85ºC operating case temperature without output power de-ration
• Remote sense compensation
• Fixed 400 KHz operating frequency
• Output adjustable to ±10% of nominal output with external resistors
• Enable functional pin for remote on/off control
• Under voltage lockout (UVLO)/input under-voltage protection
• Overload and short circuit protection
• Low noise with integrated input and output filters
• No external filter capacitors required
• Soft start
• Synchronization, input and output
• Logic high signal power OK (POK) for output status
• End-of-life (EOL) worst case analysis (WCA)
• MIL-PRF-38534 element evaluated components
• Derating per MIL-STD-1547 for space flight
• MTBF > 2.8 million hours for space flight environments
• Size: 1.9”L x 1.5”W x 0.335”H excluding I/O pins and mounting tabs
• Weight: 60 grams maximum
• Custom versions available

SBB Series

SBB Series Block Diagram