onsemi NCV59301DS28R4G

Overview

NCV59301DS28R4G from onsemi is an automotive-grade, 3.0 A very low-dropout (VLDO) linear regulator in D2PAK-5 package, delivering fixed 2.8 V output with typical dropout voltage of 300 mV at 3.0 A load and ±2.5% output voltage accuracy across –40°C to +125°C. It integrates logic-compatible enable and open-collector error flag pins, reverse output current protection, thermal shutdown, and current limiting - designed for FPGA, DSP, and post-regulation in automotive power systems.

For engineers reviewing the NCV59301DS28R4G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, 2.8 V fixed output, 13.5 V max input, ceramic-capacitor stability, and integrated fault signaling via FLG pin - all critical for high-reliability embedded power rails.

Technical Context

The NCV59301DS28R4G implements a PMOS pass transistor architecture enabling ultra-low dropout and fast transient response. Its internal error amplifier drives the pass element with precision feedback from a trimmed bandgap reference, supporting stable regulation under dynamic loads up to 3.0 A.

It features dual-level protection: overcurrent limiting (3.5–5 A trip range) and thermal shutdown (>125°C), plus reverse output current blocking when EN = low or VIN = 0 V (up to 6.5 V reverse bias). The FLG pin asserts low when VOUT drops below 95% of nominal (2.66 V), with 2% hysteresis.

Key Specifications

Pinout & Package

D2PAK-5 surface-mount package (Case 936A) with exposed tab thermally and electrically connected to GND - requires PCB copper pour for thermal management and EMI reduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current, automotive-grade LDO applications.

Compared with NCV59300DS28R4G, the NCV59301DS28R4G adds system-level controllability and diagnostics via EN/FLG; versus TPS7A83AQRGWRQ1, it delivers automotive-specific protections (reverse current, wider temp range, AEC-Q100) at the cost of higher ground current.

Availability

NCV59301DS28R4G is available at Aetrix Electronics and suitable for automotive body electronics, FPGA power delivery, and industrial PLC I/O modules requiring stable component supply, AEC-Q100 compliance, and full production traceability.

Supply support for NCV59301DS28R4G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The NCV59301DS28R4G belongs to the NCV59300 series of automotive-qualified VLDO regulators, engineered specifically for high-current, fault-aware point-of-load regulation in safety-critical vehicle subsystems.

FAQ

What is the maximum input voltage rating for the NCV59301DS28R4G?

The NCV59301DS28R4G supports a maximum input voltage of 13.5 V under recommended operating conditions, with absolute maximum rating up to 18 V. Operation above 13.5 V is not guaranteed and may impact reliability or regulation accuracy. For automotive applications with load-dump transients, external clamping or pre-regulation is advised to keep VIN within 13.5 V during normal operation.

Does the NCV59301DS28R4G require an external pull-up resistor on the FLG pin?

Yes, the NCV59301DS28R4G FLG pin is an open-collector output and requires an external pull-up resistor to a valid logic rail (e.g., 3.3 V or 5 V). Typical values range from 10 kΩ to 100 kΩ. Without pull-up, the flag cannot assert a valid high state, disabling fault detection capability. The FLG sink current is rated up to 5 mA during fault conditions.

Can the NCV59301DS28R4G be used with ceramic output capacitors only?

Yes, the NCV59301DS28R4G is explicitly designed for stability with ceramic output capacitors ≥47 µF (X7R or X5R dielectric). Unlike older LDOs, it does not require ESR-based damping, eliminating the need for aluminum or tantalum capacitors. This reduces footprint, improves reliability, and enhances high-frequency noise rejection.

What is the dropout voltage of the NCV59301DS28R4G at 2.0 A load?

The NCV59301DS28R4G exhibits a typical dropout voltage of 250 mV at 2.0 A load (based on Figure 5 in the datasheet, extrapolated from 1.5 A and 3.0 A curves). At this condition, minimum input voltage required to maintain 2.8 V output is 3.05 V. Dropout increases with temperature and varies ±150 mV across process and voltage extremes.

Is the exposed tab of the NCV59301DS28R4G electrically connected, and how should it be handled on the PCB?

Yes, the exposed tab of the NCV59301DS28R4G is internally connected to the GND pin and must be soldered to a large PCB copper pour tied to the system ground plane. This connection provides both thermal dissipation (R_JC = 2.1°C/W) and low-inductance grounding for noise suppression. Isolating or floating the tab violates thermal and electrical specifications and risks thermal runaway or instability.