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Voltage regulators maximize efficiency in space applications

Thu, 10/07/2010 - 6:59am

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SBB-SeriesInternational Rectifier introduced the SBB Series of non-isolated, radiation hardened (RAD-Hard) Point-of-Load (POL) voltage regulators. The new devices are designed to maximize efficiency in space applications including satellites requiring long mission life up to 15 years or 100Krads of total ionizing dose (TID).

The SBB Series delivers high efficiency of up to 89 percent, allowing the use of a smaller heatsink to reduce overall size and weight of the system. The new devices, suitable for designs using new digital signal processors, ASIC and FPGA technologies, feature 30 W output power or output current of 14 A. Standard outputs of 1.0 V, 1.2 V, 1.5 V. 1.8 V, 2.5 V, and 3.3 V can each be adjusted to ±10% of a nominal output for precise output setting. Integrated input and output filters are also featured to ensure low noise performance for stand-alone operation without the need for external filter components.

“With high efficiency performance well suited to the high power requirements of two-stage distributed power architecture design applications, the SBB Series addresses the ongoing need to reduce size and weight, as well as the increasing needs of FPGA and other digital circuitries for increased bandwidth, data processing speed, and the higher processing power requirements of digital electronics onboard spacecraft,” said Tiva Bussarakons, marketing director, IR’s HiRel DC-DC Converter Products.

The SBB Series was developed using proven space-level design methodology that includes IR’s proprietary discrete-based PWM controller and components with known radiation performance fully de-rated to the requirements of MIL-STD-1547.

Weighing less than 55 g in a compact form factor, other key features of the new devices include 4.5 V to 5.5 V input range, SEE LET (Heavy Ions) greater than 82 MeV.cm2 /mg, under voltage lockout (UVLO), remote sense compensation, adjustable output voltage, power OK (POK) status, and remote on and off control.

Specifications

Part Number*

Output Voltage (V)

Output Current (A)

Output Power (W)

Typ
Efficiency (%)

SBB501S

1.0

14.0

14

72

SBB501R2S

1.2

14.0

16.8

73

SBB501R5S

1.5

14.0

21

76

SBB501R8S

1.8

14.0

25

79

SBB502R5S

2.5

12.0

30

86

SBB503R3S

3.3

9.1

30

89


* add /EM suffix for engineering evaluation model, i.e. SBB501S/EM

Datasheets for the devices in addition to a White Paper are available on the International Rectifier website at http://www.irf.com.

Availability and Pricing

Pricing begins at $5000 each for the SBB503R3S in 10-unit quantities. Production orders are available immediately. Prices are subject to change. This product is subject to U.S. export control laws and regulations.

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