onsemi NCV8187AMTW110TAG

Overview

NCV8187AMTW110TAG from onsemi is a 1.2 A low-quiescent-current (30 µA typ.), low-dropout linear voltage regulator with fixed 1.1 V output, Power Good open-drain signal, and thermal shutdown protection. It operates from 1.5 V to 5.5 V input, delivers ±2% output accuracy over load/line/temperature, and is stable with a 10 µF ceramic output capacitor. It is used in automotive infotainment power rails requiring precise, low-noise 1.1 V supply for SoC core domains.

For engineers reviewing the NCV8187AMTW110TAG datasheet, pinout, applications, or equivalent options, this page provides verified technical context, package-specific pin functions, real-world design implications of PSRR (75 dB @ 1 kHz), output noise (15 µV_RMS), dropout behavior (325 mV @ 1.2 A, 1.2 V output), and validated automotive-grade alternatives.

Technical Context

The NCV8187AMTW110TAG implements a PMOS pass transistor architecture enabling ultra-low quiescent current (30 µA typ. across −40°C to +150°C) and fast soft-start response. Its internal reference is trimmed to 0.8 V, and the fixed 1.1 V output is achieved via an integrated resistor divider - eliminating external feedback components while maintaining ±2% regulation accuracy under full load, line, and temperature variation.

It integrates a dedicated open-drain Power Good (PG) output with 92% rising / 80% falling thresholds relative to nominal V_OUT, active discharge resistance (120 Ω typ.), and thermal shutdown at 170°C with 15°C hysteresis. The EN pin features CMOS-compatible thresholds (V_{EN_HI} = 0.9 V min, V_{EN_LO} = 0.3 V max) and sub-100 nA leakage.

Key Specifications

Pinout & Package

NCV8187AMTW110TAG is packaged in WDFNW6 2×2 mm wettable flank (Case 511DW), optimized for automated optical inspection (AOI) and solder joint reliability in automotive applications. Exposed thermal pad (pin 3) connects to PCB ground plane for enhanced thermal dissipation (R_JC(bot) = 7.8 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCV8187AMTW110TAG, the NCV8187AMT110TAG offers identical electrical performance in a lower-cost package lacking wettable flanks, while TLV73311PDBVR trades current capability, protection features, and automotive qualification for smaller footprint and lower I_Q - making it unsuitable for ASIL-B systems or >300 mA loads.

Availability

NCV8187AMTW110TAG is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics control units requiring stable component supply with full AEC-Q100 documentation and PPAP support.

Supply support for NCV8187AMTW110TAG 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 (Nasdaq: ON) is a global semiconductor leader focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.

The NCV8187AMTW110TAG belongs to onsemi's automotive-grade LDO family designed specifically for demanding power rails in ASIL-B compliant systems - emphasizing low noise, high accuracy, robust thermal protection, and manufacturability in automotive assembly lines.

FAQ

What is the maximum input voltage rating for NCV8187AMTW110TAG?

The absolute maximum input voltage for NCV8187AMTW110TAG is 6.0 V, but the recommended operating range is 1.5 V to 5.5 V per the datasheet. Operation above 5.5 V risks permanent damage even for short durations, and the device is not guaranteed to regulate correctly outside its specified operating range. Always include input overvoltage clamping if upstream sources may exceed 5.5 V.

Does NCV8187AMTW110TAG require an external resistor divider for its 1.1 V output?

No, NCV8187AMTW110TAG is a fixed-output variant with the 1.1 V setting implemented internally. No external resistors are needed - the SNS pin is internally tied to OUT, and the feedback network is laser-trimmed during manufacturing. This eliminates layout sensitivity and improves long-term accuracy versus adjustable configurations.

How does the Power Good (PG) output behave when the EN pin is pulled low?

When EN is low, the NCV8187AMTW110TAG enters shutdown mode and the internal PG transistor is disabled (open-circuit). The PG pin then floats at the voltage level set by the external pull-up resistor - it does not actively drive low. To ensure a defined logic-low PG during shutdown, connect the pull-up resistor to V_OUT so that PG follows V_OUT collapse.

Can NCV8187AMTW110TAG be used with ceramic output capacitors smaller than 10 µF?

The NCV8187AMTW110TAG is characterized and guaranteed stable with ≥10 µF X5R/X7R ceramic capacitors. Using smaller values (e.g., 4.7 µF) may result in marginal phase margin, increased output impedance at high frequencies, and degraded transient response - especially under 1.2 A load steps. For production designs, adhere strictly to the 10 µF minimum recommendation.

Is the thermal pad (pin 3) of NCV8187AMTW110TAG electrically connected to GND?

Yes, the exposed thermal pad (pin 3) of NCV8187AMTW110TAG is internally connected to GND and must be soldered to a PCB ground plane. This connection serves both electrical grounding and thermal conduction - omitting it increases junction temperature by >30°C at full load and violates the thermal design basis validated in the datasheet.