onsemi NCP59301DS33R4G

Overview

NCP59301DS33R4G from onsemi is a 3.3 V, 3.0 A very low-dropout (VLDO) linear regulator in D2PAK−5 package with logic-compatible enable and open-collector error flag pins, delivering <300 mV typical dropout at full load and stable operation with ceramic output capacitors - used for FPGA/DSP core power supply post-regulation.

For engineers reviewing the NCP59301DS33R4G datasheet, pinout, applications, or equivalent options, this page provides verified functional specifications, thermal performance data, protection features, and real-world design context for point-of-load regulation in industrial and automotive systems.

Technical Context

The NCP59301DS33R4G implements a PMOS pass transistor architecture enabling fast transient response and reverse output current protection during shutdown. Its internal circuitry integrates CMOS/TTL-compatible enable logic, open-collector fault flag with 93–99.2% VOUT hysteresis, and linear current limiting that holds output current constant under overload.

It operates across 2.24 V to 13.5 V input range with ±2.5% output voltage accuracy over −40°C to +125°C, supports ceramic output capacitance ≥47 µF, and includes thermal shutdown, reverse current blocking up to 6.5 V (VOUT–VIN), and ESD protection per AEC-Q100 requirements.

Key Specifications

Pinout & Package

D2PAK−5 package (Case 936A) with exposed tab thermally and electrically connected to GND - requires PCB copper pour for thermal management and low-impedance ground return.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MIC29300-3.3WU and TPS7A8300RGRT, the NCP59301DS33R4G uniquely combines D2PAK-5 mechanical robustness, enable/flag logic interface, reverse current protection, and AEC-Q100-qualified variant - making it optimal for industrial and automotive point-of-load regulation where reliability and system visibility are critical.

Availability

NCP59301DS33R4G is available at Aetrix Electronics and suitable for FPGA power supplies, industrial PLCs, automotive infotainment systems, and networking switch ASIC biasing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for NCP59301DS33R4G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.

The NCP59300/59301 series was designed specifically for high-current, low-noise point-of-load regulation in FPGA, DSP, and ASIC power domains - emphasizing fast transient response, ceramic-capacitor compatibility, and integrated protection for mission-critical systems.

FAQ

What is the maximum input voltage rating for NCP59301DS33R4G?

The NCP59301DS33R4G supports a maximum input voltage of 18 V per absolute maximum ratings, but its recommended operating range is 2.24 V to 13.5 V. Operating above 13.5 V may compromise long-term reliability and is not guaranteed by specification. The device's internal protection remains active up to 18 V, but design margin should be maintained using the 13.5 V upper limit for normal operation.

Does NCP59301DS33R4G require an external output capacitor, and what type is recommended?

Yes, the NCP59301DS33R4G requires an external output capacitor for stability and transient performance. The datasheet specifies ≥47 µF ceramic (X7R or X5R) as the minimum value. This capacitor reduces output impedance at high frequencies, improves load step response, and suppresses noise - unlike electrolytic types, ceramic capacitors provide lower ESR and longer lifetime without derating.

How does the error flag (FLG) pin function on NCP59301DS33R4G?

The FLG pin on NCP59301DS33R4G is an open-collector output that pulls low when VOUT drops below 93–95% of nominal (≈3.07–3.14 V), indicating undervoltage or overload. It remains high otherwise and can sink up to 5 mA during fault. A pull-up resistor (typically 10 kΩ to VCC) is required externally. The flag has 2% hysteresis to prevent chatter near the threshold, and its behavior is fully specified across −40°C to +125°C.

Is NCP59301DS33R4G pin-compatible with NCP59300DS33R4G?

No, NCP59301DS33R4G (D2PAK−5) is not pin-compatible with NCP59300DS33R4G (D2PAK−3). The former has five pins (EN, VIN, GND, VOUT, FLG); the latter has three (VIN, GND, VOUT) and lacks enable and flag functionality. PCB layout, thermal pad connection, and routing must differ - they share voltage/current specs but serve distinct system roles requiring different control interfaces.

What thermal resistance values apply to NCP59301DS33R4G in typical PCB mounting?

For NCP59301DS33R4G in D2PAK−5 package, junction-to-case (R_JC) is 2.1°C/W, and junction-to-ambient (R_JA) is 52°C/W when mounted on a PCB with 100 mm² of 2 oz copper heat-spreading area. These values assume proper soldering of the exposed tab to GND plane. Without adequate copper, R_JA increases significantly - thermal design must verify junction temperature stays ≤125°C under worst-case load and ambient conditions.