Diodes Incorporated AP7347DQ-12FDZW-7

Overview

AP7347DQ-12FDZW-7 from Diodes Incorporated is an automotive-grade 1.2V fixed-output low-dropout linear regulator delivering 500mA output current with ±1% output voltage accuracy, 75dB PSRR at 1kHz, and 60µV_rms output noise (10Hz–100kHz). It features enable control, thermal shutdown, short-circuit protection, and auto-discharge functionality - designed for noise-sensitive power rails in ADAS camera modules and infotainment domain controllers.

For engineers reviewing the AP7347DQ-12FDZW-7 datasheet, AP7347DQ-12FDZW-7 pinout, AP7347DQ-12FDZW-7 application, or AP7347DQ-12FDZW-7 equivalent, key selection criteria include its AEC-Q100 qualification, WDFN2020-6 wettable flank package for solder joint inspection, 0.32V max dropout at 500mA (for V_OUT = 1.2V), and guaranteed operation from –40°C to +125°C ambient.

Technical Context

The AP7347DQ-12FDZW-7 integrates a CMOS-based error amplifier, precision voltage reference, current-limit circuit, and thermal shutdown logic. Its internal architecture supports fast load transient response (<10µs settling) and includes an N-channel auto-discharge switch (30Ω typical) activated during shutdown to rapidly discharge V_OUT.

It operates across a 1.7V–5.5V input range and maintains regulation down to 1.2V output with dropout as low as 0.65V (typical) at 500mA. The EN pin accepts logic-level control (V_IL ≤ 0.5V, V_IH ≥ 1.25V) and draws only 10nA leakage, enabling ultra-low-power system sequencing.

Key Specifications

Pinout & Package

AP7347DQ-12FDZW-7 uses the W-DFN2020-6 (SWP) wettable flank package (2.0mm × 2.0mm, 0.75mm height), optimized for automated optical inspection (AOI) of solder joints. The exposed pad (EP) must be connected to GND via large copper area for thermal dissipation (θ_JA = 54°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6217D122MR-G and RT9080L-12PU5, the AP7347DQ-12FDZW-7 uniquely combines AEC-Q100 Grade 1 qualification, wettable flank packaging for automotive process control, auto-discharge, and guaranteed ±1% accuracy - making it the only drop-in solution for safety-critical automotive LDO applications requiring full PPAP support.

Availability

AP7347DQ-12FDZW-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera power management, and wireless communication modules requiring stable component supply under AEC-Q100-compliant manufacturing and traceable sourcing.

Supply support for AP7347DQ-12FDZW-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

The AP7347DQ series belongs to Diodes' automotive-qualified LDO portfolio, engineered specifically for noise-sensitive, high-reliability power rails in ADAS, infotainment, and vehicle connectivity systems.

FAQ

What is the minimum input voltage required for AP7347DQ-12FDZW-7 to regulate 1.2V output at 500mA?

The AP7347DQ-12FDZW-7 requires a minimum input voltage of 2.0V to maintain regulation at 500mA output, based on its maximum dropout voltage of 0.80V (at V_OUT = 1.2V). At lighter loads, regulation is maintained down to 1.7V input, but full 500mA capability demands VIN ≥ V_OUT + 0.8V = 2.0V.

Does AP7347DQ-12FDZW-7 require an external pull-up resistor on the EN pin?

No external pull-up is required. The EN pin has no internal pull-up; however, if unused, it must be tied directly to VIN to ensure permanent enable. Leaving EN floating risks undefined operation due to susceptibility to noise or leakage currents - Diodes explicitly states it "must not be floating" per datasheet Pin Descriptions section.

Can AP7347DQ-12FDZW-7 be used in a 1.8V output configuration?

No. AP7347DQ-12FDZW-7 is factory-trimmed for fixed 1.2V output only, as indicated by the "12" suffix in the part number. The AP7347DQ family offers multiple voltage variants (e.g., -18FDZW-7 for 1.8V), but each is a distinct orderable part with dedicated internal resistor network - no external feedback or adjustment is supported.

What is the purpose of the NC pins (2 and 5) in the W-DFN2020-6 package?

Pins 2 and 5 are internally unconnected and serve no electrical function. Diodes recommends connecting them to GND on the PCB to increase copper area for improved thermal conduction and reduced EMI coupling. This practice enhances thermal performance without altering device functionality or electrical behavior.