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. During optocoupler-enhanced operation, 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. For maximum versatility, all BK30 devices can operate as traditional LDOs through a simple two-pin short.
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 = 0.1 A | Min Vin @ Iout = 0.1 A | QFN package |
|---|---|---|---|---|
| BK301D18V | 0 V – 2 V | 79 mA / 63 mA | Vout + 1.4 V (L) Vout + 2.8 V (M) | QFN-28 · 6×6×0.8 mm |
| BK301D33L | 2 V – 4 V | 91 mA | 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 | Vout + 4.1 V (H) | QFN-32 · 7×7×0.8 mm |
| BK300D50E | 4 V – 5 V | 62 mA | 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 info@polarissemiconductor.com.
Ready to design it in?
Request evaluation samples, detailed datasheets, and SPICE models — an engineer answers, not a sales funnel.