PMIC (Power Management IC)
Multiple rails, sequencing, supervision, and protection in one integrated chip.
What is it?
A PMIC integrates multiple regulators (bucks + LDOs), sequencing logic, supervisors, and protection circuits into a single chip. Used in systems with 3+ rails where discrete regulators would consume too much board space — automotive cameras, infotainment processors, network ASICs, etc. PMICs handle the boring orchestration (turn rails on/off in the right order, monitor for faults) so the system designer can focus on the application.
When do you need it?
- Automotive camera modules requiring multiple regulated rails (CIS analog/digital, ISP core/IO).
- Embedded SoC platforms needing 5+ rails with strict sequencing.
- Communication modules where size and BOM count must be minimised.
- Networking ASICs with on-the-fly voltage scaling.
- Multi-channel sensor front-ends with precision rails.
How to pick the right one
- Number and type of rails
- Count bucks + LDOs + protection features needed. Most PMICs are spec'd to a target SoC.
- Per-rail current capability
- Match each integrated rail's IOUT spec to your load.
- Sequencing flexibility
- OTP (one-time-programmable) factory sequencing vs I²C runtime control. OTP is simpler/cheaper, I²C lets firmware adjust.
- Functional safety / ASIL
- For automotive: does the PMIC have FMEDA, ABIST, ISO 26262 documentation? Critical for ASIL-B+ applications.
- Package and thermal
- QFN sizes 3×3 to 5×5 mm common; thermal pad sizing matters for sustained full-load operation.
What Magnias offers
Magnias PMIC family targets automotive camera and similar multi-rail applications. Flagship MI8101B-N33 offers 3 synchronous bucks + 1 LDO in compact 3×3 mm QFN with e-Fuse OTP configuration, spread-spectrum + phase-shift + dither EMI suppression, AEC-Q100 Grade 1, and clean fast-transient performance for CIS camera modules.