onsemi NCV5662DS15R4G

Overview

NCV5662DS15R4G from onsemi is an automotive-grade, fixed-output 1.5 V, 2.0 A low-dropout linear regulator in D2PAK package with ultra-fast transient response (1–3 µs), 26 µV_rms output noise, and integrated Enable and Error Flag functions. It delivers stable power to ASIC cores and server VRM post-regulation stages under high-current, thermally demanding conditions.

For engineers reviewing the NCV5662DS15R4G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 2.0 A (1.0–1.3 V), AEC-Q100 qualification, thermal shutdown at 160°C, and error flag threshold at 91–97% of nominal output.

Technical Context

The NCV5662DS15R4G implements a bipolar-based LDO architecture with a 0.9 V internal reference and low-ground-current design (≤3.0 mA, load-independent). Its error flag circuitry monitors regulated output against a precision threshold (91–97% V_OUT) and asserts open-drain low within 50 µs when out-of-regulation-excluding transient blips.

It features dual protection: current limiting clamps peak output at 3.0 A (beyond 2.0 A rated), and thermal shutdown activates at 160°C. The device operates across −40°C to +125°C ambient, with input voltage range from (V_OUT + V_DO) up to 18 V, supporting post-regulation in multi-rail systems where headroom is constrained.

Key Specifications

Pinout & Package

D2PAK-5 (Case 936A-02), thermally enhanced surface-mount package with exposed tab connected to GND. Designed for high-power dissipation with R_JA = 45°C/W (on 1-in² copper).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP5662DS15R4G, the NCV5662DS15R4G adds AEC-Q100 qualification and functional error flag-critical for automotive safety monitoring-while matching all core LDO parameters. Versus TPS7A8300RGRT, it trades smaller footprint for robust D2PAK thermal performance and integrated diagnostics, better suited for high-reliability, high-power applications.

Availability

NCV5662DS15R4G is available at Aetrix Electronics and suitable for server VRM post-regulation, automotive ADAS domain controllers, and industrial PLC I/O modules requiring stable component supply across extended temperature and long lifecycle commitments.

Supply support for NCV5662DS15R4G 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT markets.

The NCV5662 series belongs to onsemi's automotive-qualified LDO portfolio, designed specifically for high-current, low-noise, fault-aware power delivery in safety-critical vehicle subsystems.

FAQ

What is the maximum input voltage rating for the NCV5662DS15R4G?

The NCV5662DS15R4G has an absolute maximum input voltage of 18 V. Operation is specified from (V_OUT + V_DO) up to 9 V for normal use, but the device withstands transient inputs up to 18 V without damage. This headroom allows integration after wide-range DC-DC converters in automotive and industrial systems where input surges may occur. Always verify safe operating area per datasheet Figure 14 when designing for high differential voltage conditions.

Does the NCV5662DS15R4G require an external bypass capacitor to achieve its specified 26 µV_rms noise performance?

No, the NCV5662DS15R4G achieves 26 µV_rms output noise without any external bypass capacitor-this is a verified specification under standard test conditions (C_in = C_out = 150 µF, I_OUT = 10 mA, T_A = 25°C). The internal architecture eliminates the need for additional ceramic capacitors typically used for noise suppression, reducing BOM count and PCB area. However, proper input/output capacitance remains essential for stability and transient response.

How does the Error Flag (EF) pin on the NCV5662DS15R4G behave during startup and fault conditions?

The EF pin on the NCV5662DS15R4G is an open-drain output that remains high-impedance until the output reaches regulation. Once enabled and stable, EF stays logic high unless V_OUT falls below 91–97% of nominal (1.365–1.455 V for 1.5 V output), at which point it pulls low within 50 µs. During startup, EF asserts high only after V_OUT crosses the threshold and remains stable-no blanking is applied to startup overshoot. This behavior makes NCV5662DS15R4G suitable for systems requiring precise undervoltage detection without false triggers.

What thermal derating applies to the NCV5662DS15R4G when mounted on a 1 oz copper PCB without forced airflow?

With a 1-in² copper pad (1 oz), the NCV5662DS15R4G has R_JA = 45°C/W. At T_A = 125°C and T_J(max) = 150°C, maximum allowable power dissipation is 556 mW - limiting continuous output current to ~370 mA at 2.5 V input (1.0 V dropout). To sustain 2.0 A, thermal design must reduce R_JA via larger copper area, multiple thermal vias, or heatsinking. Derating curves in Figure 5 and Figure 8 confirm V_DO and I_SC remain stable across temperature, but power handling depends entirely on PCB layout.

Is the NCV5662DS15R4G pin-compatible with other members of the NCP5662/NCV5662 family?

Yes, the NCV5662DS15R4G shares identical pinout and package (D2PAK-5) with all DS-suffix fixed-output variants (e.g., NCV5662DS33R4G) and the adjustable NCV5662DSADJR4G. Pin 1 = EN, Pin 2 = Vin, Pin 3/Tab = GND, Pin 4 = Vout, Pin 5 = EF (fixed) or ADJ (adjustable). This allows drop-in replacement across output voltages and versions-though EF and ADJ functions are mutually exclusive and require corresponding schematic updates for correct operation.