onsemi NCP59151DS30R4G

Overview

NCP59151DS30R4G from onsemi is a fixed-output, 3.0 V, 1.5 A very low-dropout (VLDO) linear regulator in D2PAK-5 package, featuring 300 mV typical dropout at full load, logic-compatible enable input, open-collector error flag output, and stable operation with ceramic capacitors. It delivers precision regulation for FPGA core supplies and post-regulation in switching power systems.

For engineers reviewing the NCP59151DS30R4G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed automotive-grade alternatives, and supply-chain support details specific to this D2PAK-5 3.0 V variant.

Technical Context

The NCP59151DS30R4G implements a high-precision bandgap reference with internal feedback network set for 3.0 V nominal output, enabling ±2.5% accuracy over −40°C to +125°C. Its fast transient response is achieved via optimized internal compensation and low output impedance, supporting rapid load steps up to 1.5 A without significant voltage deviation.

It integrates CMOS/TTL-compatible enable logic, open-collector flag with 93–99.2% VOUT threshold hysteresis, reverse output current protection during shutdown, and thermal shutdown triggered above +125°C junction temperature. Input voltage range is 2.24 V to 13.5 V, with absolute max rating up to 18 V.

Key Specifications

Pinout & Package

D2PAK-5 package (Case 936A), thermally enhanced with exposed tab connected to GND; footprint requires ≥100 mm² 2 oz copper pour for RJA = 52°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MIC29150-3.0WT and NCV8664ADT30RKG, the NCP59151DS30R4G uniquely combines 1.5 A capability, 300 mV dropout, integrated EN/FLG, and D2PAK-5 thermal performance-making it the only option among the three qualified for high-current, fault-aware industrial POL applications.

Availability

NCP59151DS30R4G is available at Aetrix Electronics and suitable for industrial PLCs, FPGA power rails, server BMCs, and battery-powered test equipment requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for NCP59151DS30R4G 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NCP59150 series was designed specifically for high-current, low-noise point-of-load regulation in FPGA, DSP, and ASIC applications where fast transient response, ceramic-capacitor compatibility, and robust protection are mandatory.

FAQ

What is the maximum input voltage rating for the NCP59151DS30R4G?

The NCP59151DS30R4G has an absolute maximum input voltage rating of 18 V, but its recommended operating input voltage range is 2.24 V to 13.5 V. Operation above 13.5 V may cause excessive power dissipation or thermal stress, even if within absolute ratings. The 13.5 V limit ensures safe operation under worst-case thermal conditions while maintaining specified output accuracy and protection functionality for the NCP59151DS30R4G.

Does the NCP59151DS30R4G require an external resistor divider for output voltage setting?

No, the NCP59151DS30R4G is a fixed-output 3.0 V regulator and does not require an external resistor divider. Its feedback network is fully internal; the ADJ pin is absent in this variant. Only adjustable versions like NCP59152DSADJR4G use external resistors. The NCP59151DS30R4G simplifies layout and reduces BOM count by eliminating external components needed for voltage programming.

What thermal performance can be expected from the NCP59151DS30R4G in a standard PCB layout?

With a 100 mm² 2 oz copper heat-spreading area, the NCP59151DS30R4G achieves RJA = 52°C/W. At 1.5 A load and 3.3 V input, power dissipation is ~450 mW, resulting in ~23°C rise above ambient. This allows full 1.5 A operation up to +70°C ambient without thermal shutdown. Performance degrades significantly without adequate copper pour, so the D2PAK-5 tab must be soldered to a solid GND plane per onsemi's layout guidelines for the NCP59151DS30R4G.

How does the error flag (FLG) pin function on the NCP59151DS30R4G?

The FLG pin on the NCP59151DS30R4G is an open-collector output that pulls low (<500 mV at 1 mA) when VOUT falls below 93–95% of 3.0 V (i.e., ~2.79–2.85 V). It features 2% hysteresis to prevent chatter during marginal conditions. An external pull-up resistor (typically 10 kΩ to 3.3 V) is required. This flag enables real-time monitoring of rail health in safety-critical systems using the NCP59151DS30R4G.

Is the NCP59151DS30R4G pin-compatible with other devices in the NCP59150 series?

Yes, all D2PAK-5 variants in the NCP59150 series-including NCP59151DS25R4G, NCP59151DS30R4G, and NCP59152DSADJR4G-share identical pinout (EN, VIN, GND, VOUT, FLG/ADJ). However, the fifth pin function differs: fixed-voltage parts use FLG, while adjustable parts use ADJ. Swapping requires verifying external circuitry (e.g., flag pull-up vs. feedback divider) to avoid malfunction of the NCP59151DS30R4G or replacement device.