onsemi NCV8702MX25TCG

Overview

NCV8702MX25TCG from onsemi is an automotive-grade ultra-low-noise, ultra-low-quiescent-current LDO linear voltage regulator delivering 200 mA output with 2.5 V fixed output voltage, 140 mV typical dropout at full load, ±2% output accuracy, and 11 µV_RMS integrated noise (100 Hz–100 kHz). It powers noise-sensitive analog circuits in satellite radio receivers, rear-view cameras, and portable entertainment systems.

For engineers reviewing the NCV8702MX25TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, adaptive ground current circuit enabling 10 µA quiescent current at no load, active output discharge, and stability with only a 1 µF ceramic output capacitor.

Technical Context

The NCV8702MX25TCG employs a PMOS pass transistor architecture with integrated adaptive ground current control that dynamically reduces quiescent current under light loads. Its internal bandgap reference, soft-start circuitry, and UVLO (1.2–1.9 V threshold) ensure robust startup and brownout immunity.

It features active output discharge via a 1 kΩ internal pull-down path when disabled, and thermal shutdown (160°C trip, 20°C hysteresis) with current limiting (385 mA typ.) for fault protection. The EN pin provides precise logic-level enable control with 0.4 V low-threshold and 0.9 V high-threshold.

Key Specifications

Pinout & Package

NCV8702MX25TCG is housed in a 6-pin XDFN 1.5 × 1.5 mm package (Case 711AE), optimized for space-constrained automotive PCBs and thermally enhanced with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0525PDBVR and NCP114AMX25T2G, the NCV8702MX25TCG delivers superior noise performance (11 vs. ≥18 µV_RMS), automotive qualification, and active discharge-making it the only viable choice for AEC-Q100-compliant camera and radar power rails.

Availability

NCV8702MX25TCG is available at Aetrix Electronics and suitable for satellite radio receivers, rear-view camera modules, and electronic mirrors requiring stable component supply across automotive production lifecycles.

Supply support for NCV8702MX25TCG 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCV8702MX25TCG belongs to onsemi's NCV automotive LDO family, engineered specifically for powering noise-sensitive analog and RF circuitry in AEC-Q100-compliant vehicle subsystems.

FAQ

What is the maximum input voltage rating for the NCV8702MX25TCG?

The NCV8702MX25TCG has an absolute maximum input voltage of 6 V. Operation above this level risks permanent damage. For reliable long-term use, the recommended operating input voltage range is 2.0 V to 5.5 V, which aligns with common automotive battery and USB-powered system rails. This range ensures optimal PSRR and dropout performance across temperature and load conditions.

Does the NCV8702MX25TCG require an external noise-bypass capacitor?

No, the NCV8702MX25TCG does not require an external noise-bypass capacitor. Its ultra-low 11 µV_RMS output noise (100 Hz–100 kHz) is achieved through internal design, eliminating the need for a dedicated 10 nF–100 nF bypass cap. This simplifies layout, reduces BOM count, and avoids potential resonance issues associated with discrete bypass networks - a key advantage over legacy LDOs like the LP2985 series.

How does the active discharge function operate in the NCV8702MX25TCG?

When the EN pin is driven below 0.4 V, the NCV8702MX25TCG activates an internal 1 kΩ pull-down path from OUT to GND. This discharges the output capacitor rapidly, ensuring monotonic turn-off behavior critical for power sequencing in multi-rail systems. The discharge current is limited to prevent excessive stress on downstream components, and the feature remains fully functional across the −40°C to +125°C junction temperature range.

Is the NCV8702MX25TCG compatible with ceramic output capacitors smaller than 1 µF?

No - the NCV8702MX25TCG is specified and guaranteed stable only with a minimum 1 µF ceramic output capacitor (X5R or X7R dielectric, ±10% initial tolerance). Using smaller values risks instability, oscillation, or degraded transient response. The datasheet explicitly states that 1 µF is the lower bound for guaranteed stability, and evaluation was performed using 0402- and 1206-size MLCCs meeting these specifications.

What thermal derating applies to the NCV8702MX25TCG in a typical 1 oz FR4 PCB layout?

On a standard 1 oz FR4 PCB with 645 mm² copper area, the NCV8702MX25TCG exhibits a junction-to-ambient thermal resistance (θ_JA) of 149°C/W. At 25°C ambient, its maximum safe power dissipation is ~0.5 W. With 200 mA load and 140 mV dropout, power dissipation is 28 mW - well within limits. However, at 125°C ambient, the maximum allowable power drops to ~0.25 W, still comfortably above operational needs for most automotive cabin applications.