BK30 Series
Ultra-Low Noise, Optocoupler-Enhanced Linear Regulators
BK30 Series overview
BK30 is a series of ultra-low-noise, optocoupler-enhanced linear voltage regulators that use Polaris Semiconductor’s patented circuit topology. Built around the premium LT3045 LDO and integrated with our high-efficiency optocoupler chips, these devices deliver best-in-class noise and PSRR performance while achieving efficiencies 1.2× to >2× higher than conventional LDOs.
The BK30 series is available in a range of input and output configurations to address diverse application requirements. Available output voltage ranges include 0–2 V, 2–4 V, and 4–6 V, all with adjustable settings within their respective ranges. Polaris ELRs improve efficiency by connecting LEDs within our optocouplers in electrical series with the LDO within the package. Therefore, the input voltage requirement exceeds the output voltage by a margin determined by the optocoupler configuration. Product codes ending with “V” feature configurable optocoupler settings via board-level pin connections. Configurations with LED series string lengths of 1, 2, 4 and 5 are labeled “L”, “M”, “H” and “E”, respectively. For maximum versatility, all BK30 devices can operate as traditional LDOs by simply shorting two pins together to bypass the LEDs.
Base LDO: LT3045. Every device can also be operated as a conventional LDO by shorting two pins.
Device configurations
| Device | Nominal Vout range | Iin @ Iout = 100 mA | Min Vin @ Iout = 100 mA | QFN package |
|---|---|---|---|---|
| BK301D18V | 0 V – 2 V | 79 mA (L) 63 mA (M) | Vout + 1.4 V (L) Vout + 2.8 V (M) | QFN-28 · 6×6×0.8 mm |
| BK301D33L | 2 V – 4 V | 91 mA (L) | Vout + 1.4 V (L) | QFN-32 · 7×7×0.8 mm |
| BK301D33V | 2 V – 4 V | TBD TBD | Vout + 2.8 V (M) Vout + 5.5 V (H) | QFN-32 · 7×7×0.8 mm |
| BK301D50H | 4 V – 6 V | 79 mA (H) | Vout + 4.1 V (H) | QFN-32 · 7×7×0.8 mm |
| BK300D50E | 4 V – 5 V | 62 mA (E) | Vout + 7.0 V (E) | QFN-32 · 7×7×0.8 mm |
- All devices are adjustable down to Vout = 0 V.
- Iin is typical input current after device turn-on.
- Product IDs ending in “V” are configurable for one of two input-voltage ranges, selectable via board-level pin connections.
Applications
- Ultra-Low-Noise Supply Requirements
- Efficient Point-of-Load Regulator
- Rad-Tolerant Space Power Supply
- RF & Analog Electronics
- Medical Devices
- Scientific Instrumentation
- High-Precision Data Converters
- Low-Jitter Clocks & PLLs
- High-Speed Data Links
Technical documentation
Application notes, white papers, and spotlights covering the BK30 series.
Datasheets and SPICE models ship with a sample request — or email [email protected].
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