onsemi NCV891330PD50R2G

Overview

NCV891330PD50R2G from onsemi is an automotive-grade dual-mode step-down regulator that operates as either a 2 MHz PWM buck converter (up to 3.0 A) or a low-noise LDO linear regulator in light-load conditions, delivering a fixed 5.0 V output. It withstands load dumps up to 45 V, features a 30 µA quiescent current in low-I_q mode, and integrates reset functionality with fixed delay for microcontroller interfacing - ideal for infotainment power rails.

For engineers reviewing the NCV891330PD50R2G datasheet, pinout, applications, or equivalent options, key selection considerations include VIN range (3.7–36 V), dual-mode transition behavior, ±2% output accuracy, thermal shutdown at 155°C, and SOIC-8 EP package compatibility with automotive PCB layout constraints.

Technical Context

The NCV891330PD50R2G implements hybrid regulation: it starts in PWM mode at power-up, then transitions to low-I_q linear mode when output current drops below ~40 mA (at 5 V), provided VIN remains between 8 V and 19 V. Mode switching is managed by internal comparators monitoring I_OUT, VIN, and DRV voltage, with blanking periods (500 µs after switcher mode, 300 µs before transition) preventing chatter.

Its control architecture includes integrated slope compensation (1.45–2.8 A/s), analog foldback short-circuit protection (450–650 kHz), hiccup mode under severe overload, and independent UVLO (4.1–4.5 V start), overvoltage shutdown (36.5–39.0 V), and frequency foldback (18.4–19.8 V) thresholds - all qualified per AEC-Q100 Grade 1 (−40°C to +150°C).

Key Specifications

Pinout & Package

NCV891330PD50R2G uses the SOIC-8 exposed pad (Case 751AC) package, requiring thermal connection of the EPAD to GND for optimal thermal performance (R_θJA = 30°C/W on 4-layer FR4).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-mode automotive regulator applications.

Compared with TPS62130AQDGSRQ1 and MAX20004AATP/V+T, the NCV891330PD50R2G uniquely combines true dual-mode operation (PWM + LDO), 45 V load dump rating, and AEC-Q100 Grade 1 qualification in a single SOIC-8 EP package - making it the only choice for cost-sensitive, space-constrained automotive modules requiring both high-current capability and sub-50 µA sleep current.

Availability

NCV891330PD50R2G is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and ADAS camera power applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for NCV891330PD50R2G 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, with leadership in automotive, industrial, and cloud power solutions.

The NCV891330PD50R2G belongs to onsemi's automotive power management portfolio, designed specifically for battery-connected ECUs needing robust, low-noise, dual-mode DC-DC conversion in harsh vehicle environments.

FAQ

What is the maximum input voltage the NCV891330PD50R2G can withstand without damage?

The NCV891330PD50R2G is rated to withstand transient input voltages up to 45 V - compliant with ISO 7637-2 Pulse 5a load dump tests. Its absolute maximum VIN is 45 V, and it incorporates an overvoltage shutdown threshold of 36.5–39.0 V to disable switching before reaching destructive levels. This makes the NCV891330PD50R2G suitable for direct connection to 12 V and 24 V automotive batteries without external clamping diodes in most applications.

Does the NCV891330PD50R2G require external components to set its 5.0 V output?

No, the NCV891330PD50R2G has a factory-trimmed fixed 5.0 V output - no external feedback resistors are needed. The VOUT pin serves as both output and internal feedback node. Required external components are minimal: input capacitor (≥10 µF ceramic), bootstrap capacitor (0.1 µF), gate driver capacitor (0.1 µF), output capacitor (≥30 µF ceramic), and inductor (2.2–3.3 µH). This simplifies layout and improves reliability versus adjustable regulators.

How does the NCV891330PD50R2G transition between PWM and linear modes?

The NCV891330PD50R2G transitions automatically: it starts in PWM mode at power-up, then monitors output current. If I_OUT falls below ~40 mA (for 5 V output) and VIN is between 8 V and 19 V, it switches to low-I_q linear mode after a 300 µs assessment window. Transition back to PWM occurs in <2 µs when load exceeds 50 mA or VIN rises above 19 V. A 500 µs blanking period prevents rapid toggling.

What is the purpose of the RSTB pin on the NCV891330PD50R2G, and how should it be used?

The RSTB pin on the NCV891330PD50R2G is an open-drain reset output that pulls low when VOUT drops below 4.50–4.75 V (5 V option), with 10–25 µs noise filtering and a 14–18 ms restart delay. It must be pulled up to VOUT via a resistor (e.g., 10 kΩ) to generate a logic-high signal. This provides a clean, debounced reset signal to microcontrollers in automotive ECUs, eliminating need for external reset ICs in designs like infotainment head units.

Is the NCV891330PD50R2G compatible with standard SOIC-8 footprints?

The NCV891330PD50R2G uses the SOIC-8 exposed pad (Case 751AC) package, which has the same body dimensions and lead pitch as standard SOIC-8 but includes a thermally enhanced EPAD on the underside. It is not compatible with standard SOIC-8 land patterns - the EPAD must be connected to GND with ≥4 thermal vias and a dedicated copper pour. Use the manufacturer-recommended footprint from the datasheet page 15 to ensure thermal performance and solder joint reliability.