Diodes Incorporated AP7347DQ-10FDZW-7B

Overview

AP7347DQ-10FDZW-7B from Diodes Incorporated is an automotive-grade 500mA low-dropout linear regulator with fixed 1.0V output, ±1% accuracy, 75dB PSRR at 1kHz, 60µV_rms output noise (10Hz–100kHz), and 60µA quiescent current. It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality - designed for noise-sensitive power rails in ADAS cameras and infotainment systems.

For engineers reviewing the AP7347DQ-10FDZW-7B datasheet, AP7347DQ-10FDZW-7B pinout, AP7347DQ-10FDZW-7B application, or AP7347DQ-10FDZW-7B equivalent, key selection criteria include AEC-Q100 qualification, WDFN2020-6 wettable flank package thermal performance (θ_JA = 54°C/W), dropout voltage ≤0.75V at 500mA (for V_OUT = 1.0V), and EN logic thresholds (V_IL ≤ 0.5V, V_IH ≥ 1.25V).

Technical Context

This LDO employs a CMOS-based error amplifier with integrated voltage reference and current-limit circuitry. Its architecture supports fast load transient response (<10µs settling) and stable operation with 1µF ceramic input/output capacitors - enabled by low-ESR optimization and internal compensation.

The device integrates an N-channel auto-discharge switch (R_ON ≈ 30Ω) activated during shutdown, ensuring rapid V_OUT discharge to prevent back-powering. Thermal shutdown triggers at +170°C with +20°C hysteresis, and it operates across –40°C to +125°C ambient with junction limits up to +150°C.

Key Specifications

Pinout & Package

AP7347DQ-10FDZW-7B uses the W-DFN2020-6 (SWP) wettable flank package (2.0mm × 2.0mm, 0.65mm pitch), optimized for automated optical inspection (AOI) and thermal performance via exposed pad (EP) connection to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6210B102MR-G and RT9080AL-10GJ6F, AP7347DQ-10FDZW-7B uniquely combines AEC-Q100 Grade 1, auto-discharge, 60µV_rms noise, and WDFN2020-6 thermal performance - making it the only option qualified for safety-critical ADAS camera core rails where noise, reliability, and controlled shutdown are mandatory.

Availability

AP7347DQ-10FDZW-7B is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC core supplies, and telematics always-on rails requiring stable component supply, AEC-Q100 traceability, and long-term lifecycle support.

Supply support for AP7347DQ-10FDZW-7B 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

Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets.

The AP7347DQ belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive power domains in ADAS, infotainment, and body electronics - emphasizing PSRR, low noise, and AEC-Q100 reliability.

FAQ

What is the maximum allowable input voltage for AP7347DQ-10FDZW-7B?

The absolute maximum input voltage is 6.0V, but the recommended operating range is 1.7V to 5.5V. Exceeding 5.5V risks permanent damage per Absolute Maximum Ratings. For 1.0V output, minimum input is 1.7V - sufficient to maintain regulation even during automotive battery cold-crank dips to ~6.5V system level (after upstream buck conversion).

Does AP7347DQ-10FDZW-7B require an external pull-up on the EN pin?

No external pull-up is required. The EN pin has no internal pull-up; however, it must never be left floating. If always-on operation is needed, connect EN directly to VIN. For controlled enable/disable, drive EN with a GPIO capable of meeting V_IH ≥ 1.25V and V_IL ≤ 0.5V thresholds - no series resistor needed for standard 1.8V/3.3V logic.

How should the exposed pad (EP) be connected on the W-DFN2020-6 package?

The exposed pad must be soldered to a dedicated PCB copper area connected to GND - not used as the sole GND electrode. Use ≥4 thermal vias (0.3mm diameter) connecting the pad to inner-layer ground planes. This achieves the specified θ_JA = 54°C/W; omitting vias or leaving EP unconnected degrades thermal performance by >40°C/W.

Is AP7347DQ-10FDZW-7B compatible with 1µF ceramic output capacitors?

Yes - the device is internally compensated and stable with 1µF X5R/X7R ceramic capacitors (6.3V rating) placed within 2mm of VOUT and GND pins. Larger capacitance (e.g., 10µF) improves load transient response but is not required. Avoid high-ESR tantalum or aluminum electrolytics, which may cause instability.