AEC-Q100 Grade 1 LDO for Automotive Power Rails
The NCV8163AMX280TBG: It delivers a fixed 2.8V output at up to 250mA from a 5.5V maximum input rail, with a maximum dropout voltage of 0.16V at full load — the input-to-output headroom must stay above 160mV across load and temperature to maintain regulation.
PSRR Profile and Noise Rejection
Power-supply rejection ratio is specified as 92dB at 100Hz, falling to 60dB at 100kHz — this sweep covers the fundamental and harmonics of a typical 400kHz automotive buck converter, so the LDO attenuates upstream switching ripple by at least 60dB before it reaches the load. At 20µA typical quiescent current, the regulator's own draw is well below the leakage floor of a battery-backed always-on domain — a body controller or sensor module that stays powered in sleep mode sees negligible drain from the LDO itself.
Protection and Control Features for Fault-Tolerant Design
Built-in over-current and over-temperature protection contain fault conditions — a shorted output or high ambient temperature event triggers foldback or thermal shutdown, preventing the pass device from entering secondary breakdown. An enable pin allows the output to be gated by a system supervisor or sequenced power-up controller, keeping the 2.8V rail off until the upstream supply is stable.
Package and Board Integration
Housed in a 4-XDFN with exposed pad measuring 1x1mm, the package suits space-constrained ECU boards where a 2.8V local rail must be placed close to the load — the 0.5mm pin pitch demands a controlled solder-paste stencil aperture to avoid bridging.
Sourced through authorized and independent distribution; pricing and lead time are confirmed at RFQ against the BOM quantity. No pin-compatible second-source is listed by onsemi, so the BOM position is single-sourced to this order code.